Preparation method for high-temperature-resistant ceramic precursor adhesive

The invention discloses a preparation method for a high-temperature-resistant ceramic precursor adhesive. The preparation method comprises the following steps of (1) adding metal sodium and methylbenzene into a three-opening flask with a condensation backflow device and a mechanical stirring device, heating to 80-120 DEG C under the protection of inert atmosphere, dropping methyl dichloresilane, preserving the heat of 80-140 DEG C for 2-4 hours after dropping is finished, and filtering and distilling to remove an organic solvent to obtain liquid polymethylsilane; (2) mixing liquid polymethylsilane and tetramethyldivinyldisilazane according to a mass ratio of 1:(1 to 10), preserving the heat of 100-250 DEG C for 1-10 hours under the protection of inert atmosphere, and obtaining a liquid polymethylsilane precursor; (3) respectively adding a micron-level inorganic filler and a nano-level inorganic filler into the liquid polymethylsilane precursor, and uniformly mixing to obtain the high-temperature-resistant ...

Nano silicon oxide modified high polymer composite material and preparation technique thereof

The invention relates to a series superfine powder which adopts nano silicon oxide and can release negative ions. Anion series negative ion additive is prepared by a doping and mixing method, and is added into the high molecular materials of fibers of polyurethane, polyether, polystyrene, polyvinyl chloride, polyvinyl acetal, polypropylene, polyethylene and epoxide resin, plastics, rubber, paintings, bonding agents and the like, thus successfully producing modified high molecular material of nano silicon oxide with the function of releasing the negative ions. The nano silicon oxide and superfine powder which can release the negative ions in the composite material has good dispersion and does not have any technique defects in the processing process.

Water pressure detection device based on intelligent internet of things

The utility model discloses a water pressure detection device based on an intelligent internet of things. Detection cylinder, the top of the detection cylinder is communicated with a detection tube; the left side of an inner cavity of the detection cylinder is slidably connected with a piston, the surface of the piston is sleeved with a sealing ring, a baffle ring is fixedly connected to the position, located on the right side of the piston, of the middle of the inner surface of the detection cylinder, and a protruding block is fixedly connected to the position, located on the right side of the baffle ring, of the inner surface of the detection cylinder. The utility model discloses a water pressure detection device based on the intelligent Internet of Things. The airtight cavity between the piston and the electronic barometer is inflated by arranging the inflating pipe; the maximum static friction force of the piston can be detected, the influence of the friction force of the piston ondetection ...

PROCEDURE AND DEVICE FOR PR�FUNG A CONTENTS SERVER

Intelligent Internet of Things energy consumption detection device based on smart park

The utility model discloses an intelligent Internet of Things energy consumption detection device based on a smart park. The utility model relates to the technical field of Internet of Things energy consumption monitoring. The device comprises a fixed bracket and a machine body, the machine body is located on one side of the fixing support. A plurality of connecting rods are fixedly mounted in thefixed bracket; fixing rods are fixedly installed on the two sides of the front end of the fixing support. A groove is formed in the fixed rod; a display screen is fixedly mounted at the front end, close to the upper end, of the machine body; a regulation and control keyboard is fixedly mounted in the middle of the front end of the machine body; a data interface is fixedly mounted at the front end, close to the lower end, of the machine body; installation supports are fixedly installed on the two sides of the lower end of the machine body, so that the installation process of the device body iseasier ...

A GIS ELECTRONIC INSTRUMENT TRANSFORMER TEST SYSTEM AND METHOD THEREOF

A testing system of a GIS electronic mutual inductor for opening/closing a capacitive low current based on an isolating switch. The testing system comprises a high-voltage testing transformer connected to one BSG bushing, a capacitor voltage divider, a load capacitor positioned on the other BSG bushing, and an isolating switch positioned between the two bushings. A one-time transient testing system and an electronic mutual inductor to be tested are calibrated, the electronic mutual inductor to be tested is connected to one end of a two-time converter, a merging unit is connected to the other end thereof, and a fault recorder is connected to the other end of the merging unit. A voltage value and a current value of a high-voltage bus are tested when the isolating switch is opened/closed, thereby being compared with the output of the electronic mutual inductor to be tested. By means of the testing system, the electromagnetic environments with voltage levels of 110KV, 220KV and 500KV in the ...

PGaN epitaxial wafer with high carrier concentration, preparation method and application

The invention discloses a PGaN epitaxial wafer with high carrier concentration, a preparation method and application, the epitaxial wafer comprises a substrate, and a UGaN isolation layer, a PGaN epitaxial layer and a PGaN ohmic contact layer which are sequentially arranged on the substrate, and Mg atoms and O atoms are doped in the PGaN epitaxial layer. The method comprises the following steps: arranging a substrate in an MOCVD reaction chamber; introducing an Al source, a Ga source and an N source to form a low-temperature AlGaN buffer layer; a UGaN isolation layer is formed on the AlGaN buffer layer; a Ga source, an N source and an Mg source are introduced, a PGaN epitaxial layer is formed, and the Ga source comprises oxygen-containing TMGa and common TMGa; and increasing the flow of the Mg source to form the PGaN ohmic contact layer. An oxygen-containing Ga source, an oxygen-containing N source and an oxygen-containing Mg source are introduced, so that O atoms and H atoms are combined ...

Battery cover assembly for portable electronic device

A battery cover assembly includes a battery cover (3) defining a pair of guide rails (326) therein, a connecting member (2), a housing (1) defining a receiving slot (164) and at least a battery-receiving compartment (194), a plurality of springs (5), and an antenna rod (4). The connecting member is slidingly received in the guide rails along a lateral direction, and the antenna rod inserts into the receiving slot through the connecting member and the springs such that the battery cover can rotate about the antenna rod. When the battery cover is rotated downwardly to the housing, a force is required to press the battery cover down upon the housing, and then inwardly along a direction toward the antenna rod until locking projections (302) on the cover catch in troughs (182) defined in the housing.

Method and system for presentation of content from one cellular phone to another through a computer network

A cellular phone issues a request for content from a server. The cellular requests and authorizes the content for use by another cellular phone. When the content is received by the second cellular phone, the first cellular phone is billed.

Server device, subscriber machine for corporation system and said corporation system

Method for recycling ethylene glycol monomethyl ether

The invention relates to a method for recycling ethylene glycol monomethyl ether. The method disclosed by the invention comprises the following steps: recycling an ethylene glycol monomethyl ether solution with the moisture content of being less than 20% from ethylene glycol monomethyl ether industrial waste water with the moisture content of being more than or equal to 40% by using a salting-out layering method at first, and then, rectifying to remove water in an azeotropic manner or dehydrating through a drying agent so as to obtain an ethylene glycol monomethyl ether finished product with the moisture content of being less than or equal to 0.2%. According to the invention, the methods, such as the salting-out layering method and the method for rectifying to remove water in an azeotropic manner or dehydrating through the drying agent, are combined; therefore, the method for recycling ethylene glycol monomethyl ether from industrial waste water can be realized with low cost; particularly ...

Preparation method for prestressed high-strength concrete pile

The invention provides a prestressed high-strength concrete pile, belongs to the filed of building, and in particular relates to a driven fender pile applied to deep foundation pit engineering. The prestressed high-strength concrete pile comprises concrete, a reinforcing cage and an end plate, wherein the shape of the end plate is round-angle square; diameters of circular arc segments of round angles are equal and are 1.1 to 1.3 folds of the side length of the square, preferably 1.2 folds; central angles of the circular arc segments are 13 degrees to 17 degrees, and the length of a straight-line segment is 0.3 to 0.5 fold of the side length of the square; the grade of the concrete strength is higher than C40; and a main reinforcement of the reinforcing cage is arranged on a circle taking a centroid of the end plate as a center or on the square. The prestressed high-strength concrete pile greatly reduces the problem of stress concentration and the damage to a pile body in construction, and ...

GaN epitaxial layer stripping structure, preparation method and stripping method

The invention discloses a GaN epitaxial layer stripping structure, a preparation method and a stripping method.The GaN epitaxial layer stripping structure comprises a substrate, an etching layer set and a GaN stripping layer which are sequentially arranged from bottom to top, and the etching layer set comprises an AlGaN buffer layer, an n-GaN layer, a u-GaN layer and a GaN sacrificial layer which are sequentially arranged from bottom to top; and the etching layer group is provided with a groove group penetrating through the etching layer group. Compared with the prior art, the etching layer group has the groove group penetrating through the whole etching layer group, when subsequent electrochemical stripping is carried out, a solution enters the groove group with the cavity and then is in full contact with the etching layer group, etching can be carried out from the cavity area to the middle, the distance needed by etching is greatly reduced, and the chemical reaction efficiency during ...

Defeated thick liquid mud press of atmospheric pressure

Defeated thick liquid mud press of atmospheric pressure relates to filter mud mechanical equipment field. Its characterized in that: including mud press, air compressor and forcing transmission device, air compressor connection pressure conveyor, pressure conveyor connects the mud press, the forcing transmission device include overhead tank (18) and pressure cover (19), install in overhead tank (18) feed inlet department through fastener pressure cover (19), overhead tank (18) upper portion is equipped with air inlet (14), air inlet (14) are equipped with the discharge gate through tube coupling air compressor, overhead tank (18) lower part, the discharge gate passes through conveying pipeline (17) and connects the mud press. Change that defeated thick liquid mud press of atmospheric pressure design is simple, area is little, work efficiency improves three times than former mud pumping over thick liquid, has avoided the mud material to pollute, improves operational environment, the convenient ...

Self-driven polarized photoelectric detector and preparation method thereof

The invention discloses a self-driven polarized photoelectric detector and a preparation method thereof, and the self-driven polarized photoelectric detector comprises an Al2O3 substrate which is provided with a first surface and a second surface; the intrinsic GaN epitaxial layer is located on the first surface of the Al2O3 substrate; the SiNx insulating layer is positioned on the surface of the intrinsic GaN epitaxial layer; the two-dimensional Te layer covers the SiNx insulating layer and the intrinsic GaN epitaxial layer at the same time; the Te layer electrode is positioned on the surface of the two-dimensional Te layer; and the GaN layer electrode is positioned on the surface of the intrinsic GaN epitaxial layer. The photoelectric detector is made of the novel material Te, so that the performance of the photoelectric detector is comprehensively improved.

4H-SiC JBS diode structure and preparation method thereof

The invention discloses a 4H-SiC JBS diode structure and a preparation method thereof, and the 4H-SiC JBS diode structure comprises an N-type SiC substrate; the first metal electrode is positioned on the back surface of the N-type SiC substrate; the N-type SiC epitaxial layer is positioned on the front surface of the N-type SiC substrate, and an active region above the N-type SiC epitaxial layer is provided with a groove; the secondary epitaxial P-type material is positioned on the groove; the SiO2 isolation layer is positioned above the N-type SiC epitaxial layer and the secondary epitaxial P-type material; and the second metal electrode is positioned above the SiO2 isolation layer. According to the invention, a P-type injection region formed by ion injection is replaced by the growth-type secondary epitaxial P-type material, serious damage to the surface of a device due to complexity and large implementation difficulty of the existing process is avoided, the growth thickness and the doping ...

VERFAHREN UND VORRICHTUNG ZUR PRÜFUNG EINES INHALTSERVERS

Electronic transformer status monitor system

The invention provides an electronic transformer status monitor system. The electronic transformer status monitor system comprises a distributed control unit, a main control unit and an output unit, wherein the distributed control unit is used to collect data volume signals and state variable signals of an electronic transformer, and comprises a data volume collection unit, a state variable collection unit, a standard transformer collection unit, a synchronous interface control unit and a wave record storage control unit, the main control unit is used to monitor, display and store data volume signal errors and work status of the electronic transformer, and comprises a control module, a status monitor module, an accuracy monitor module and a wave record monitor module, and the output unit comprises a local real time display unit and a remote real time display unit. Compared with the prior art, the electronic transformer status monitor system can monitor a plurality of the electronic transformers ...

Medical ophthalmology equipment

The utility model relates to a medical ophthalmology equipment, including camera bellows, operating area and flute profile box, the bottom of flute profile box is equipped with the waffle slab, be equipped with the lug on the outer wall of the left and right side frame of flute profile box respectively, the both ends of flute profile box are equipped with the curb plate, the bottom of curb plate is fixed on the camera bellows, pass through spring coupling between curb plate and the lug, be equipped with the leader casing on the back side frame outer wall of flute profile box, the operating area comprises flute profile box leader casing, curb plate and waffle slab. The utility model discloses a set up the operating area and help operating personnel to carry out eye diagnostic apparatus tool disinfection cleaning, help the operating personnel subregion to diagnose parts operation work through setting up the waffle slab, help reducing the operating area and wait to collide parts and carry ...

Bridge bored pile hole wall opening protection method

The invention discloses a bridge bored pile hole wall opening protection method, which is used for protecting a hole wall opening of a bridge bored pile, which is provided with a sand covering layer and a crushed rock layer. The method comprises the following steps of: a, building a construction platform; b, inserting a steel casing in the construction platform to make the steel casing embedded in the crushed rock layer; c, arranging a drilling machine on the construction platform, and pre-drilling the steel casing to form pre-bored holes; d, pulling out the drilling machine, and inserting small casings into the pre-bored holes, wherein the small casings are provided with a plurality of stop lever holes and grouting nozzles; e, arranging stop levers in the stop lever holes, and arranging grouting devices on the grouting nozzles; and f, grouting by using the grouting devices, and detaching the grouting devices after the slurry is primarily cured. A mixture of cement and water glass is adopted ...

Method and system for presentation of content from one cellular phone to another through a computer network

A cellular phone issues a request for content from a server. The cellular requests and authorizes the content for use by another cellular phone. When the content is received by the second cellular phone, the first cellular phone is billed.

Parking platform with automatic position adjustment function, parking chamber and mechanical equipment for parking automobile

The invention discloses a parking platform with the automatic position adjustment function, a parking chamber and mechanical equipment for parking an automobile. The parking platform with the automatic position adjustment function comprises a parking frame and a plurality of wheel transverse movement mechanisms, wherein the parking frame is provided with a supporting surface, the wheel transverse movement mechanisms are arranged on the supporting surface, and are arranged at the parking positions, of front wheels, on the supporting surface and the parking positions, of rear wheels, on the supporting surface respectively, and the wheel transverse movement mechanisms are arranged on the two sides, perpendicular to the heading direction of a vehicle, of the supporting surface in an opposite mode. When the vehicle enters the parking chamber and gets out of the parking chamber, the position of the vehicle can be adjusted through wheel transverse movement mechanisms, it is ensured that the vehicle ...

Non-fusible treatment method of polysilazane or polyborosilazane fibres

The invention discloses a non-fusible treatment method of polysilazane or polyborosilazane fibres, which comprises the following steps: (1) drying a non-fusible reactor with a chemical vapor non-fusible device and a microwave generator, repeatedly vacuumizing the non-fusible reactor, and charging an inert atmosphere for at least three times so as to discharge the air and moisture from the reactor; (2) putting polysilazane or polyborosilazane fibril which contains Si-H or/and N-H or/and B-Hand needs non-fusible treatment in the non-fusible device, introducing a chemical crosslinking atmospherefor 10s to 120min, and introducing a chemical atmosphere containing the N-H for 30s to 60min; and (3) putting the fibre processed by step (2) in the microwave generator, exposing the fiber in the microwave generated by the microwave generator for 5s to 240 min, and thus obtaining the non-fusible polysilazane or polyborosilazane fibres. The method of the invention has the advantages of simple process ...

Non-fusible treatment method of polysilazane or polyborosilazane fibres

The invention discloses a non-fusible treatment method of polysilazane or polyborosilazane fibres, which comprises the following steps: (1) drying a non-fusible reactor with a chemical vapor non-fusible device and a microwave generator, repeatedly vacuumizing the non-fusible reactor, and charging an inert atmosphere for at least three times so as to discharge the air and moisture from the reactor; (2) putting polysilazane or polyborosilazane fibril which contains Si-H or/and N-H or/and B-Hand needs non-fusible treatment in the non-fusible device, introducing a chemical crosslinking atmosphere for 10s to 120min, and introducing a chemical atmosphere containing the N-H for 30s to 60min; and (3) putting the fibre processed by step (2) in the microwave generator, exposing the fiber in the microwave generated by the microwave generator for 5s to 240 min, and thus obtaining the non-fusible polysilazane or polyborosilazane fibres. The method of the invention has the advantages of simple process ...

General purpose type chest cavity indwelling drainage tube

The invention discloses a universal thoracic retention drainage tube, which comprises a double-chamber duct with flexibility and plasticity, wherein one chamber is a washing chamber, the other chamber is a drainage chamber, and the section of the washing chamber is smaller than the section of the drainage chamber; the front end of the double-chamber duct is processed into a circle shaped leading-in part, while the rear end is provided with a washing horn mouth communicated with the washing chamber and a drainage horn mouth communicated with the drainage chamber; and the inner side of the circle of the leading-in part is provided with a drainage hole communicated with the drainage chamber, while the outer side is provided with a washing hole communicated with the washing chamber. The universal thoracic retention drainage tube is provided with the drainage chamber and the washing chamber simultaneously and can simultaneously perform drainage and washing; the drainage chamber is large and ...

Preparation for polyborosilazanes precursor

The invention relates to a preparation method of a polyborosilazane precursor. The preparation method adopts halogenosilane, halogenoborane and small molecular disilazane as initial raw materials which are heated to 150 to 500 DEG C after being mixed according to a certain mixture ratio, kept at the temperature for 2 to 30 hours, decompressed and distilled after the temperature is reduced, and cooled to room temperature, thus the polyborosilazane precursor is prepared. The polyborosilazane precursor prepared by the preparation method can be used for preparing ceramic fibers, ceramic massive material and ceramic-based compound material, and is especially suitable for preparing wave transparent ceramic material.

Merchandise management device and merchandise management method

A merchandise management device is provided for a store having a first display location where a number of first merchandise is to be displayed and a second display location where a number of second merchandise is to be displayed. The merchandise management device includes cameras positioned to capture a first image indicating how many of the first merchandise is displayed at the first location and a second image indicating how many of the second merchandise is displayed at the second location, and a processor configured to detect whether or not there is a change in a displayed number of the first merchandise and a displayed number of the second merchandise, and for each merchandise item for which the change is detected, determine a degree and a direction of change and generate a replenishment alert if the degree of change in a decreasing direction is greater than a threshold.

Anti-falling device for climbing frame

The invention discloses a climbing frame anti-falling device which comprises a main protection structure and an auxiliary protection structure, and the auxiliary protection structure is fixedly arranged on the main protection structure; the invention relates to the technical field of anti-falling devices, and through the cooperation of the main protection structure and the auxiliary protection structure, the safety of the climbing frame can be enhanced; electronic equipment is adopted, and by means of speed induction generated in the falling process of a rotating speed detector, clamping protection of an iron chain which is released when power is lost is achieved; the device can be matched with an existing steel structure falling protection device which achieves falling prevention through differential speed and is installed on a rail for use; and the use safety of the climbing frame can be improved, a safety guarantee is added for constructors, and locking protection at different positions ...

Message processing method, and method and device for detecting medium access control (MAC) address

Electrode with intrakardial pace-making device

The invention discloses an electrode with intrakardial pace-making device, which comprises an electric conduction wire, wherein the front part of the electric conduction wire is connected with an electric conduction head; the electric conduction head is a memory alloy spring wire which is manufactured by using memory alloy microfilament and has a diameter less than or equal to 0.2mm. The invention can be used for rapidly, efficiently and safely rescuing patients in an emergency room, can improve rescue mission success rate of heart arrest patients, and obviously improve prognosis dispose and survival quality of a patient.

Solar cell volt-ampere characteristic test system

The invention belongs to the technical field of instrument testing, and particularly relates to a solar cell volt-ampere characteristic testing system. The hardware of the test system mainly comprises a field effect transistor, a data acquisition card and a sampling resistor. The software mainly comprises a data acquisition module, a data analysis processing module and a data storage module. According to the test system, the volt-ampere characteristic of the solar cell is automatically tested, the test period is greatly shortened, and the test error of a resistance box load method is reduced. The system has a good man-machine interaction interface and is easy to operate.

Chassis assembly and air conditioner

The invention provides a chassis assembly and an air conditioner, the chassis assembly comprises a chassis and a roller assembly, the chassis is provided with a bottom surface facing the ground, the chassis is further provided with a supporting block and a limiting structure, the roller assembly comprises a roller and a supporting rod, the roller is rotatably mounted at the first end of the supporting rod, and the roller is rotatably mounted at the second end of the supporting rod; the supporting rod is connected to the base plate and configured to rotate relative to the base plate, and the supporting rod has an extending position and a folding position. When the supporting rod is located at the stretching position, the supporting rod extends in the gravity direction and is connected with the limiting structure, the limiting structure is used for limiting the supporting rod at the stretching position, and at least part of the rolling wheel protrudes relative to the bottom face; when the ...

Novel P-GaN buried layer enhanced HEMT device and manufacturing method thereof

The invention discloses a novel GaN buried layer enhanced HEMT (High Electron Mobility Transistor) device and a manufacturing method, the device comprises a substrate, a first U-GaN high-resistance layer, a P-GaN buried layer, a second U-GaN high-resistance layer, a U-AlGaN layer, an N-AlGaN layer, a gate dielectric layer and an electrode which are stacked in sequence, and the AlGaN layer is etched to form a first groove. The method comprises the steps of sequentially forming a substrate, a first U-GaN high-resistance layer, a P-GaN buried layer, a second U-GaN high-resistance layer, a U-AlGaN layer and an N-AlGaN layer, etching the AlGaN layer to form a first groove, and then forming a gate dielectric layer and an electrode. According to the enhanced HEMT device provided by the invention, the AlGaN layer is thinned, so that the polarization at the interface of the AlGaN and the GaN is weaker, the density of two-dimensional electron gas below the groove is reduced, and a U-GaN/P-GaN/U-GaN ...

Scrape tongue ware with disinfection function

The utility model discloses a scrape tongue ware with disinfection function, including handle (1) and sleeve (2), be equipped with recess (3) of L shape on the lower surface of handle (1), what the one end hinged joint of handle (1) had a L shape scrapes the tongue ware, the other end hinged joint of handle (1) has sleeve (2), scraping in recess (3) of tongue ware embedding L shape of L shape, sleeve (2) cover the lower surface of handle (1) completely, be equipped with lithium cell (5) in sleeve (2), on the internal surface of sleeve (2) with scrape the corresponding department in tongue ware position and be equipped with a plurality of ultraviolet ray disinfection lamp (6), be equipped with ultraviolet ray disinfection lamp shift knob (7) on the surface of sleeve (2). The beneficial effects of the utility model are that, simple structure, the practicality is strong.

Technique for reading data from a recording medium without contact and processing the read data

A technique for retrieving and processing data retrieved from a non-contact recording medium without physically contacting the non-contact recording medium. The non-contact medium contains coded data including a data declaration, a graphical user interface, a determining function, and specification of a communication protocol. A portable terminal reads the data from the non-contact medium, decodes the data into a structured language code file including a data declaration function, a determining function, and a communication protocol specifying function, and stores the code file. A user may select a stored code file, which executes on the portable terminal and performs display control. The portable terminal then communicates data from the selected code file to an external device by using a specified communication protocol from the selected code file.

Preparation method of silicon-nitrogen-boron continuous ceramic fibers

The invention relates to a preparation method of silicon-nitrogen-boron continuous ceramic fibers. The method comprises the following steps: (1) nitriding and removing carbon; (2) carrying out boronizing; and (3) firing at high temperature to obtain the silicon-nitrogen-boron continuous ceramic fibers. According to the preparation method, boron is added in silicon nitride fibers to prepare silicon-nitrogen-boron fibers, compared with existing silicon-nitrogen-boron fibers, the preparation method provided by the invention adopts a simple process and is low in manufacturing cost. The preparation method can be implemented by production equipment of silicon nitride fibers and is easy to industrialize.

Method for preparing nitride ceramic fibre

The present invention provides a preparation method of nitrogen ceramic fiber. In the preparation method, the halides of the target element and small molecules disilazane are used as starting materials and are mixed according to a certain ratio; the temperature is raised to be between 125 and 500 DEG C and is maintained for 2 to 30 hours; after the temperature is lowered, the mixture is processedthrough vacuum distillation and is cooled to be at the room temperature; thus the nitrogen ceramics precursor of the target element can be prepared; the nitrogen ceramics precursor is fused for spinning to prepare the precursor fiber of nitride that is not treated through fusing; the non-molten fiber is dispersed at high temperature; after the fiber is cooled, the product of nitride ceramic fibercan be prepared. The preparation method has the advantages of low costs of raw materials, reliable source, higher synthetic yield, simple process and one-step preparation of the precursor. The efficiency ...

Growth process of MOCVD epitaxial monocrystalline silicon and epitaxial monocrystalline silicon

The invention discloses a growth process of MOCVD epitaxial monocrystalline silicon and epitaxial monocrystalline silicon, and the process comprises the steps: arranging a substrate on a graphite turntable of MOCVD equipment, the substrate comprising a natural silicon oxide layer; setting initial reaction cavity pressure, and introducing a first airflow source; h2 is introduced, and heating treatment is conducted on the graphite rotating disc; removing silicon oxide on the natural silicon oxide layer by using H2; the growth temperature is regulated and controlled to be 800-1000 DEG C, and the growth pressure is regulated and controlled to be 95-200 torr; pumping out gas in the reaction cavity, and stably introducing SiH4 into the reaction cavity to form a monocrystalline silicon buffer layer; continuously and stably introducing SiH4 into the reaction cavity to form a monocrystalline silicon epitaxial layer; and stopping introducing the SiH4, and cooling the graphite turntable. SiH4 and ...

MERCHANDISE MANAGEMENT DEVICE AND MERCHANDISE MANAGEMENT METHOD

A merchandise management device is provided for a store having a first display location where a number of first merchandise is to be displayed and a second display location where a number of second merchandise is to be displayed. The merchandise management device includes cameras positioned to capture a first image indicating how many of the first merchandise is displayed at the first location and a second image indicating how many of the second merchandise is displayed at the second location, and a processor configured to detect whether or not there is a change in a displayed number of the first merchandise and a displayed number of the second merchandise, and for each merchandise item for which the change is detected, determine a degree and a direction of change and generate a replenishment alert if the degree of change in a decreasing direction is greater than a threshold. 1. A merchandise management device for a store having a plurality of display locations for merchandise , including a first display location where a number of first merchandise is to be displayed and a second display location where a number of second merchandise is to be displayed , comprising:one or more cameras positioned to capture a first image indicating how many of the first merchandise is displayed at the first location and a second image indicating how many of the second merchandise is displayed at the second location; and detect whether or not there is a change in a displayed number of the first merchandise and a displayed number of the second merchandise, and', 'for each merchandise item for which the change is detected, determine a degree and a direction of change and generate a replenishment alert if the degree of change in a decreasing direction is greater than a threshold., 'a processor connected to the cameras and configured to'}2. The device according to claim 1 , whereinupon determining that the degree of change in the decreasing direction of the first merchandise is greater ...

Piezoelectric ceramic modulation type all-fiber current transformer component-level vibration test method

The invention discloses a piezoelectric ceramic modulation type all-fiber current transformer component-level vibration test method, which comprises the following steps of: disassembling a modulation module from an all-fiber current transformer, and still keeping a complete optical path and a complete circuit of the all-fiber current transformer; the whole modulation module is fixed on a vibration table, the all-fiber current transformer does not apply primary current, and vibration in the vertical direction, the horizontal transverse direction and the horizontal axial direction is sequentially applied to the whole modulation module; a fault recorder is adopted to continuously monitor the secondary output of the all-fiber current transformer and record the abnormal output current of the all-fiber current transformer. The anti-vibration performance of the whole modulation module and the anti-vibration performance of all components in the modulation module are effectively assessed, and then ...

JBS type organic-inorganic hybrid perovskite photoelectric detector and preparation method thereof

The invention discloses a JBS type organic-inorganic hybrid perovskite photoelectric detector and a preparation method thereof. The JBS type organic-inorganic hybrid perovskite photoelectric detector comprises a SiO2 substrate, metal electrodes are arranged on the two sides of the SiO2 substrate, P-type Si layers are arranged on the two sides of the metal electrodes, N-type Si layers are arranged at the upper ends of the P-type Si layers, and perovskite light absorption layers are arranged at the upper ends of the N-type Si layers. The organic-inorganic hybrid perovskite material has the advantages that the organic-inorganic hybrid perovskite material combines the advantages of organic molecules and inorganic molecules at the same time, the inorganic component provides a molecular network necessary for ordered transmission of current carriers, the overall thermal stability and mechanical stability of the material can be improved, and meanwhile, the organic-inorganic hybrid perovskite material ...

Hinge assembly with rotating mechanism

A hinge assembly ( 1 ) includes a housing ( 10 ) encasing a rotating mechanism ( 30 ) and an elastic plate ( 40 ) therein, with an open end ( 12 ) of the housing being covered by an end cover ( 50 ). The rotating mechanism has a cam portion ( 32 ), and a connector ( 31 ) and a shaft ( 33 ) located at opposite ends of the cam portion. The connector rotatably extends through a hole ( 51 ) of the end cover. The rotating mechanism is rotatably engaged in the housing, with the shaft being rotatably received in a bushing ( 13 ) inside the housing. The cam portion has an arcuate cam surface ( 322 ) defining at least one flat surface ( 324 ) thereon. The elastic plate abuts between an inside wall of the housing and the arcuate surface. During rotation of a cover of a folding phone, the arcuate surface is rotatably engaged with the elastic plate until the elastic plate is positioned on the flat surface of the cam portion.

Preparation method for liquid polycarbosilane precusor

The invention discloses a preparation method for liquid polycarbosilane precursor, which comprises the following steps: taking alkoxy halogenosilane, methylenehalide and magnesium as raw materials; mixing the alkoxy halogenosilane, the methylenehalide and the magnesium according to the ratio of 1:0.55:1-10; performing heat preservation and polymerization reaction on the mixture at a temperature of between 50 and 150 DEG C for 20 to 48 hours; reducing the temperature of the mixture and adding a reducing agent; raising the temperature to between 50 and 150 DEG C; performing heat preservation on the mixture for 12 to 36 hours for hydrogen reduction; reducing the temperature and performing acidification on the mixture; adding alkane and extracting an organic layer after solid-liquid separation; forming the organic layer by reduced pressure distillation; and cooling the mixture to room temperature to obtain the liquid polycarbosilane precursor. The preparation method has low cost of the raw ...

Fabricated safe unloading platform for building construction

The invention relates to the technical field of unloading platforms, and discloses an assembly type safe unloading platform for building construction, which comprises a base, four upright posts are fixedly mounted on the upper wall surface of the base, lifting blocks are respectively mounted in the four upright posts in a sliding manner, and a pair of lifting beams is fixedly connected between the two pairs of lifting blocks; a telescopic guide rod device is installed between the pair of lifting beams and used for adjusting the inclination degree during material conveying and the comprehensive angle of the moving direction of the conveying platform, an adjusting platform device is installed on the telescopic guide rod device and used for keeping the conveyed materials horizontal and the positions of the conveyed materials on the telescopic guide rod device, and a lifting adjusting device is installed on the base. The lifting adjusting device is matched with the telescopic guide rod device ...

Silicon carbide homoepitaxy-based PIN diode and preparation method thereof

The invention relates to the technical field of power electronics, and particularly discloses a silicon carbide homoepitaxy-based PIN diode and a preparation method thereof, and the preparation method comprises the steps: depositing a film, spin-coating positive photoresist, etching, removing the photoresist, removing residual SiO2, spin-coating negative photoresist, carrying out electrode evaporation, annealing and carrying out evaporation. According to the PIN diode disclosed by the invention, the material is prepared through complex epitaxial growth, so that lattice damage and pollution caused by ion implantation or physical vapor deposition can be avoided; the P-type SiC composite contact electrode structure can realize ohmic contact through short-time (within 3min) and low-temperature (700-850 DEG C) rapid annealing, so that the production cost is reduced; the total thickness of the epitaxial layer of the PIN diode is 6 microns, the starting current can reach 1A at about 2.5 V, the ...

Polycarbosilane fiber low-oxygen non-melting method

The invention relates to a polycarbosilane fiber low-oxygen non-melting method which comprises the following steps: winding a raw polycarbosilane fiber on a raw polycarbosilane fiber cylinder, putting in a drying oven provided with a gas inlet/outlet system and a blast system, heating to 130-140 DEG C at the rate of 120-180 DEG C/hour, keeping the temperature for 1-2 hours, removing the adsorbed moisture, heating to 175-180 DEG C at the rate of 10-30 DEG C/hour, and keeping the temperature for 2-3 hours; introducing nitrogen into the blast drying oven while continuing heating to 195-210 DEG C at the rate of 5-10 DEG C/hour, and keeping the temperature for 1-2 hours; and stopping heating, and naturally cooling to obtain the low-oxygen polycarbosilane non-molten fiber. The high-linearity polycarbosilane with lower softening point can be adopted, so the raw fiber has high quality. The non-melting technique is simple to control and lower in cost, and can perform mass production of the low-oxygen ...

Ultraviolet photoelectric detector and preparation method thereof

The invention discloses an ultraviolet photoelectric detector and a preparation method thereof, and the ultraviolet photoelectric detector comprises a substrate; the buffer layer is located on the surface of the substrate; the high-resistance GaN layer is located on the surface of the buffer layer; the p-GaN buried layer is located on the surface of the high-resistance GaN layer; the n-GaN channel layer is located on the surface of the p-GaN buried layer; the AlN insertion layer is located on the surface of the n-GaN channel layer; the Al < 0.25 > Ga < 0.75 > N isolation layer is located on the surface of the AlN insertion layer; the n-Al < 0.25 > Ga < 0.75 > N layer is located on the surface of the Al < 0.25 > Ga < 0.75 > N isolation layer; the p-GaN cap layer is located on the surface of the n-Al < 0.25 > Ga < 0.75 > N layer, and the p-GaN cap layer, the n-Al < 0.25 > Ga < 0.75 > N layer and the Al < 0.25 > Ga < 0.75 > N isolation layer form a first notch; the gate dielectric layer is ...

Low-cost preparation method of fiber surface silicon carbide coating

The invention provides a low-cost preparation method of a fiber surface silicon carbide coating. The low-cost preparation method comprises the following steps: (1) performing ultrasonic cleaning on fibers or a fiber fabric body, drying and then putting the dried fibers or the fiber fabric body into a deposition hearth; (2) performing vacuuming and nitrogen charging operations; (3) increasing the temperature to the range of 500-1000 DEG C, and after the temperature is stable, vacuumizing the deposition hearth to realize the pressure with the range of 1-10kPa; (4) guiding carrier gas and diluent gas into the deposition hearth and maintaining the system pressure in the range of 1-10kPa; putting a precursor, namely liquid low-molecular silicon carbide, into a bubbling bolt of which the temperature is maintained in the range of 0-25 DEG C, and bringing the liquid low-molecular silicon carbide into a deposition furnace by the carrier gas in a bubbling way so that the liquid low-molecular silicon ...

Method for preparing SiBN(C) ceramic fibre

The present invention provides a preparation method of SiBN(C) ceramic fiber. In the preparation method, silicon haloganide, boron halide and disilazane of small molecules are used as starting materials and are mixed according to a certain ratio; the temperature is raised to be between 150 and 500 DEG C and is maintained for a certain period; after the temperature is lowered, the mixture is processed through vacuum distillation and is cooled to be at the room temperature; thus the precursory of solid boron-containing polysilazane can be prepared and is then used for fusing filature to prepare precursor fiber of SiBN(C) ceramic fiber. Compared with the existing method, the preparation method has the advantages of low costs in raw materials, reliable source, higher synthetic yield, simple process and one-step preparation of the precursor; the fiber of the precursor is treated through chemical crosslinking that has high efficiency and is conducive to the integrative operation of spinning, ...

Battery fixing device

The invention provides a battery fixing device which comprises a shell for accommodating a battery, wherein the shell comprises a bottom wall, two opposite blocking parts are arranged on the bottom wall, an abutting part is arranged at a position on the bottom wall which is adjacent to one end of the blocking part, and a telescopic stop piece is arranged at a position on the bottom wall which is adjacent to the other end of the blocking part; two ends of the battery support against between the stop piece and the abutting part when the battery is accommodated in the shell, and two sides of the battery are blocked between the blocking parts; and when the battery is taken out, the stop piece is pressed to be in a compressed state so as to release the abutting to the battery from the stop piece.

Schottky heterojunction photoelectric detector and preparation method thereof

The invention discloses a Schottky type heterojunction photoelectric detector and a preparation method thereof. The Schottky type heterojunction photoelectric detector comprises a substrate, a U-shaped GaN layer, an insulating layer, a metal material layer, a source electrode and a drain electrode, the U-shaped GaN layer is arranged above the substrate; the insulating layer is arranged above the U-shaped GaN layer, a plurality of open holes are formed in the insulating layer, and the U-shaped GaN layer is exposed out of the insulating layer through the open holes; the metal material layer is arranged in the open pore and is in contact with the U-shaped GaN layer to form a Schottky heterojunction; the source electrode is arranged above the U-shaped GaN layer; the drain electrode is arranged above the metal material layer, one end of the drain electrode is stacked on the insulating layer, the other end of the drain electrode is stacked on the metal material layer, the drain electrode is not ...

VERFAHREN UND VORRICHTUNG ZUR PRÜFUNG EINES INHALTSERVERS

Application of N-[4-(benzofuran-5-radical) thiazole-2-radical] fatty acid amide as insecticide

The invention discloses application of N-[4-(benzofuran-5-radical) thiazole-2-radical] fatty acid amide as an insecticide, wherein the chemical structure of N-[4-(benzofuran-5-radical) thiazole-2-radical] fatty acid amide is shown as formula I in the specification. N-[4-(benzofuran-5-radical) thiazole-2-radical] fatty acid amide as an insecticide has very high insecticidal activity for preventing and treating aphids, red spiders and the like.

COMMODITY DATA PROCESSING DEVICE AND CONTROL METHOD

According to one embodiment, a commodity data processing device identifies a purchaser who has visited a store. The commodity data processing device acquires order information on a commodity ordered by the purchaser. The commodity data processing device acquires purchase information related to a commodity purchased by the purchaser at the store. The commodity data processing device provides a service when a condition of the service is satisfied from the order information and the purchase information. 1. A commodity data processing device , comprising:an identification component for identifying a purchaser who visits a store;a first acquisition component for acquiring order information on a commodity ordered by the purchaser;a second acquisition component for acquiring purchase information on a commodity purchased by the purchaser at the store; anda provision component for providing a service when a conclusion condition of the service is satisfied from the order information acquired by the first acquisition component and the purchase information acquired by the second acquisition component.2. The device according to claim 1 , further comprising:a search component for searching for a commodity satisfying the condition of the service from the order information acquired by the first acquisition component; anda notification component for notifying information relating to the commodity detected by the search component.3. The device according to claim 2 , whereinthe notification component notifies an information terminal used by the purchaser in the store.4. The device according to claim 1 , further comprising:a determination component for determining whether or not to provide the service based on a price of the commodity when the purchaser orders the commodity, whereinthe provision component provides the service when the condition of the service is satisfied and the determination component determines to provide the service.5. The device according to claim 1 , whereinthe ...

Connection method of Cf/SiC composite

The invention provides a connection method of a Cf/SiC composite. In the method, a Cf/SiC composite silica gel bead connector template is prepared from monodispersed silica gel beads used as template raw material by the natural sedimentation method; then the template is soaked with a ceramic precursor; after soaking, the constant-pressure high-temperature pyrolysis method is utilized to convert the ceramic precursor into SiC ceramic in the presence of protective gas N2; then the silica gel beads are eroded off with hydrofluoric acid so as to prepare a ordered porous Cf/SiC composite ceramic connector; polymethylsilane (PMS) glue is used to connect the porous ends of two ordered porous Cf/SiC composite ceramic connectors through high temperature pyrolysis, and then the sample connected by PMS glue is subjected to soaking/pyrolysis enhancement treatments three times with 40wt% of PCS tetrahydrofuran solution to finally prepare the effective connector of the Cf/SiC composite. The intermediate ...

Preparation method for prestressed high-strength concrete octagonal pile

The invention provides a prestressed high-strength concrete octagonal pile, belongs to the field of building, and in particular relates to a driven fender pile applied to deep foundation pit engineering. The prestressed high-strength concrete octagonal pile comprises concrete, a reinforcing cage, and an end plate, wherein the shape of the end plate is round-angle square; diameters of circular arcsegments of round angles are equal and are 1.1 to 1.3 folds of the side length of the square, preferably 1.2 folds; central angles of the circular arc segments are 13 degrees to 17 degrees, and the length of a straight-line segment is 0.3 to 0.5 fold of the side length of the square; the grade of the concrete strength is higher than C40; and a main reinforcement of the reinforcing cage is arranged on a circle taking a centroid of the end plate as a center or on the square. The prestressed high-strength concrete octagonal pile greatly reduces the problem of stress concentration and the damage to ...

Method for reducing thickness of subsealing concrete of steel cofferdam and preventing seepage

The invention discloses a method for reducing the thickness of subsealing concrete of a steel cofferdam and preventing seepage, comprising the following steps of: a. assembling the steel cofferdam and welding an upper circle of shearing resistant structure and a lower circle of shearing resistant structure along the inner wall of the steel cofferdam; b. feeding the steel cofferdam in water; c. welding an upper circle of shearing resistant structure and a lower circle of shearing resistant structure on the outer wall of each steel protecting tube and sequentially punching the steel protecting tubes into a foundation in the steel cofferdam; d. constructing all drilling piles; e. cleaning the foundation in the steel cofferdam and flushing the steel cofferdam and the shearing resistant structures underwater on the steel protecting tubes; f. pouring the subsealing concrete to be combined with the steel protecting tubes, the steel cofferdam and the shearing resistant structure into a whole; and ...

E-HEMT epitaxial wafer and preparation method thereof

The invention discloses an E-HEMT epitaxial wafer. The E-HEMT epitaxial wafer comprises a substrate, a U-GaN buffer layer, a P-GaN layer, a U-GaN channel layer, an AlGaN barrier layer and a gate dielectric layer, wherein the U-GaN buffer layer, the P-GaN layer, the U-GaN channel layer, the AlGaN barrier layer and the gate dielectric layer are sequentially stacked on the substrate. The P-GaN layer is not located on the topmost layer of the epitaxial wafer, but located below the AlGaN barrier layer and the U-GaN channel layer, the problem that the AlGaN barrier layer is damaged due to inaccurate P-GaN etching depth control, and accordingly 2DEG is affected is solved, and reliability and stability are improved. And meanwhile, the possibility of generating an additional leakage path on the interface side wall can be avoided, and gate electric leakage is reduced.

Fixing and holding device of chip card

The invention provides a fixing and holding device of a chip card, which comprises a basal body, a card containing chamber and an elastomer, wherein the card containing chamber is formed on the basal body and is used for installing a chip card. The card containing chamber is concavely arranged on one surface of the basal body, and a bottom wall, two oppositely arranged longitudinal side walls andanother two oppositely arranged transverse side walls are correspondingly formed on the basal body. The elastomer is arranged on one transverse side wall of the card containing chamber and is contained in the card containing chamber, the chip card is elastically arranged in the card containing chamber, and elastic push force is provided when the chip card is taken out. The fixing and holding device of the chip card has simple structure, the installation and the disassembly of the chip card are easily realized, the processes of installing and replacing the chip card become simpler, and the operation ...

Strut type electronic current transformer one-time vibration detecting device and method

The invention provides a strut type electronic current transformer one-time vibration detecting device which comprises a strut type electronic current transformer and a contact monitoring circuit. The strut type electronic current transformer and the contact monitoring circuit are respectively connected with a breaker. The contact monitoring circuit is connected with an industrial personal computer through a collecting card. The strut type electronic current transformer is connected with the industrial personal computer through a merging unit and a photoelectric converter in sequence. The invention further provides a method based on the detecting device. Opening operation, closing operation and opening-closing-opening operation are carried out on the breaker in sequence, and vibration output verification is carried out on the current transformer according to the industrial personal computer. Compared with the prior art, according to the strut type electronic current transformer one-time ...

STORE MANAGEMENT SYSTEM, ELECTRONIC RECEIPT SYSTEM, AND STORE MANAGEMENT METHOD

According to an embodiment, a store management system includes a store entry management device and a sales management device. The store entry management device reads identification data, of a shopper, for using the electronic receipt service from an information terminal of a shopper who wants to enter the store. The sales management device causes the store entry management device to permit the shopper to enter the store when the settlement data can be acquired based on the read shopper identification data. 1. A store management system comprising:a store entry management device that reads, from a processing terminal owned by a shopper who wants to enter a store, identification data of the shopper and manages entry of the shopper into the store;a behavior monitoring device that monitors behavior of the shopper that has entered the store;a settlement processing device that performs a settlement process for a product purchased by the shopper;a communication device that communicates with an external server that manages settlement data of the shopper in association with the shopper identification data; anda sales management device, the sales management deviceacquiring the shopper settlement data from the external server via the communication device based on the shopper identification data read by the store entry management device,creating sales data of a product purchased by the shopper based on a monitoring result by the behavior monitoring device, and registering the created sales data in association with the acquired settlement data,causing a settlement processing device to perform the settlement process based on the acquired settlement data and the registered sales data,generating electronic receipt data based on the acquired settlement data and the registered sales data, andtransmitting the generated receipt data, together with the acquired settlement data, to the external server via the communication device.2. The store management system according to claim 1 , ...

Preparation method and application of [2-(2-methallylpropoxy)phenoxy] aluminum hydroxycarboxylate

The invention discloses a preparation method of [2-(2-methallylpropoxy)phenoxy] aluminum hydroxycarboxylate and application of [2-(2-methallylpropoxy)phenoxy] aluminum hydroxycarboxylate in catalytic preparation of furan phenol. [2-(2-methallylpropoxy)phenoxy] aluminum hydroxycarboxylate is prepared by reacting aluminum isopropoxide or aluminum powder, hydroxy carboxylic acid and 2-(2-methallylpropoxy) phenol. [2-(2-methallylpropoxy)phenoxy] aluminum hydroxycarboxylate has a chemical structural formula shown in a formula I, wherein the structural formula is as shown in the specification. [2-(2-methallylpropoxy)phenoxy] aluminum hydroxycarboxylate is simple and convenient to prepare and convenient to use. Moreover, prepared [2-(2-methallylpropoxy)phenoxy] aluminum hydroxycarboxylate serving as a cyclization catalyst is used for catalyzing 2-(2-methallylpropoxy) phenol to prepare furan phenol, the reaction time is short, and the product is high in selectivity and high in yield.

Preparation method for ceramic precursor binder allowed to be cured at room temperature

The invention discloses a preparation method for a ceramic precursor binder allowed to be cured at the room temperature. The preparation method comprises the following steps: firstly, adding metallic sodium and methylbenzene in a three-mouth flask with a condensation flux device and a mechanical stirring device; heating the mixture to 80-120DEG C under the protection of inert gases, and dropping methyl dichloresilane; after the dropping is finished, preserving the heat at the temperature of 80-120DEG C for 4-12 hours, filtering, distilling and removing an organic solvent to obtain liquid polysilane; secondly, performing heat preservation on the liquid polysilane and 2,4,6,8-tetramethyl-2,4,6,8-tetravinyl cyclotetrasiloxane at the temperature of 80-160DEG C under the protection of the inert gases for 1-6 hours to obtain a liquid siloxane polycarbonate precursor; thirdly, uniformly mixing the liquid siloxane polycarbonate precursor with boron carbide powder, glass powder and a compound containing ...

Method for preparing multicomponent nitride ceramic precursor

The present invention provides a preparation method of multi-nitrogen ceramics precursor. In the preparation method, the halides of the target element and small molecules disilazane are used as starting materials and are mixed according to a certain ratio; the temperature is raised to be between 125 and 500 DEG C and is maintained for a certain period; after the temperature is lowered, the mixture is processed through vacuum distillation and is cooled to be at the room temperature; thus the nitrogen ceramics precursor of the target element can be prepared. The preparation method has the advantages of low costs in raw materials, reliable source, simple process of reaction, higher synthetic yield, wide applicability for preparing a ceramic system of a plurality of nitrides, simple technology, and low cost in manufacture. The by-product R<2>3SiR<3> can be recycled, which is conducive to the environmental protection.

Fire prevention baffler

The utility model provides a fire prevention baffler, including baffle, a plurality of bracing pieces, a plurality of elastic bag, the bracing piece the same with elastic bag's quantity, the one end of bracing piece be fixed in the baffle on, the other end links to each other with corresponding elastic bag, elastic bag's inside all packed phosphoric acid ammonium salt dry powder. Fire prevention baffler reliably put on the warehouse wall when flat, if any the conflagration emergence, the user can hold the handle and erect the baffle, rolls up the ceiling that the warehouse room was lived to the integrated circuit board about utilizing, with controlling two walls that the warehouse room was lived to roll integrated circuit board, utilizes the baffle to get up the shutoff of whole warehouseand keep the handle towards inflammables, the baffle can stop that the intensity of a fire spreads, and the bracing piece can separate the debris that block the burning and collapse, can burst apart after ...

Preparation method for liquid organic silicone polymer for high-temperature-resistant adhesive

The invention discloses a preparation method for a liquid organic silicone polymer for a high-temperature-resistant adhesive. The preparation method comprises the following steps of (1) adding metal sodium and an organic solvent into a three-opening flask with a condensation backflow device and a mechanical stirring device, heating to 60-120 DEG C under the protection of inert atmosphere, dropping chlorosilane, preserving the heat of 60-120 DEG C for 2-14 hours after dropping is finished, and filtering and distilling to remove the organic solvent to obtain liquid polysilane; (2) mixing liquid polysilane obtained in the step (1) and vinyl siloxane or vinyl silazane, heating a reaction system to 60-300 DEG C at the temperature rising speed of 0.5-10 DEG C per minute under the protection of inert atmosphere, performing mechanical stirring, and preserving the heat for 1-10 hours to obtain the liquid organic silicon polymer. The liquid organic silicon polymer is used as the high-temperature-resistant ...

Electromagnetic wave transmitting antenna

The invention discloses an electromagnetic wave transmitting antenna, relating to an antenna for underground transmission of measuring signals. The electromagnetic wave transmitting antenna solves the problems that insulating short sections with large processing difficulty and expensive materials are needed to connect when the traditional electromagnetic wave transmitting antenna is connected with a drill column. The electromagnetic wave transmitting antenna comprises a transmission antenna (3), wherein the transmission antenna (3) is pipe-shaped, a through hole for embedding a cable sealing head (4) is arranged on the transmission antenna (3), and an insulating connection layer (2) connected with the drill column (1) is fixed at the inside of the transmission antenna (3); and a cable (5) is fixed at one end of the cable sealing head (4). The invention has the advantages of simple processing technique and low cost.

Preparation method of GaN-based HEMT device

The invention discloses a preparation method of a GaN-based HEMT device. The preparation method comprises the following steps: S1, preparing an epitaxial wafer; s2, etching a table surface on the epitaxial wafer; s3, etching a first groove and a second groove on the AlGaN layer; s4, forming a source electrode on the first groove, forming a drain electrode on the second groove, and then annealing at the temperature of 550-600 DEG C for 1.5-3 minutes; s5, depositing a gate dielectric layer on the surface of the epitaxial wafer; and S6, performing evaporation on the surface of the gate dielectric layer to obtain a gate electrode. According to the manufacturing method, the congenital advantages of two-dimensional electron gas formed by spontaneous polarization and piezoelectric polarization of the HEMT are utilized, the relatively low annealing temperature of 550-600 DEG C and the shorter annealing time of 1.5-3 min are combined, good ohmic contact of the source electrode and the drain electrode ...

计算机系统之间的系统通信

... 提供一种用于从一个不带有终端ID的传统个人计算机到一个用于移动电话终端的服务站点的连接技术。一个模拟服务器(4)被设置为一个用于个人计算机(5或9)的代理服务器。在代理服务器(模拟服务器4)中，生成适合该格式的终端ID，并对于每一个人计算机或会话生成一cookie。终端ID和cookie相互关联并存储为一个散列表10。在代理服务器(4)中，一个终端ID被附加到来自个人计算机(5或9)的请求中，并且该请求与该终端ID一起，被传送给一个i-模式服务器(3)。 ...

Satellite disk structure for improving quality of SIC epitaxial wafer and SiC epitaxial growth equipment

The invention discloses a satellite disc structure for improving the quality of an SIC epitaxial wafer and SiC epitaxial growth equipment, and the satellite disc structure comprises a plurality of satellite disc bodies, each satellite disc body is rotatably installed on a corresponding cylindrical groove of a stone mill disc, and each satellite disc body is provided with an installation groove; the soaking sealing piece is arranged in the mounting groove of the satellite disc body in a sliding and sealing mode, an air cavity is formed between the soaking sealing piece and the mounting groove, the soaking sealing piece is provided with a growth groove for containing the SiC epitaxial wafer, and the growth groove is provided with a sunken bottom wall sunken towards the middle; and one end of each air pipe communicates with the corresponding air cavity, and the air pipes control the height of the soaking sealing piece in the mounting groove by inflating or sucking air into the air cavities ...

Preparation method for preformed hole split pouring fender pile

The invention provides a preformed hole split pouring fender pile, belongs to the field of building, in particular relate to a fender pile capable of barricading earth and water and applied to deep foundation pit engineering, and discloses a preparation method for the preformed hole split pouring fender pile. The cross section mode of the fender file is a square of which two semi-circles of opposite lateral surfaces are cut off. The fender pile is a preformed pile, has better compactness, permeability resistance, side pressure resistance and shearing resistance capacity, and does not need maintenance. The fender pile has simple construction, saves time and labor, and has short construction period and water retaining function; and the construction is completed by only driving a row of piles.

All-fiber current sensor based on in-situ deployment and modulation and demodulation method thereof

The invention discloses an all-fiber current sensor based on in-situ deployment and a modulation and demodulation method thereof, and the sensor comprises an electronic case which is used for generating a digital modulation signal and a light wave signal, transmitting the digital modulation signal to a modulation signal circuit through a modulation optical fiber, and transmitting the light wave signal to a modulation box through a first sensing optical fiber; the modulation signal circuit is used for converting the digital modulation signal into an analog signal and then sending the analog signal to the modulation box through a modulation cable; the modulation box is used for modulating the light wave signal according to the analog signal and sending the modulated light wave signal to the sensor primary body through a second sensing optical fiber; and the sensor primary body is used for processing the modulated light wave signal to generate phase difference information and sending the phase ...

Method for preparing silicon carbide fiber through high-softening-point polycarbosilane

The invention provides a method for preparing silicon carbide fiber through high-softening-point polycarbosilane. The method includes the following steps that 1. low-molecular-weight polycarbosilane is mixed with organosilane containing vinyl or silazane compound containing the vinyl, the polymerization reaction is catalyzed through hydrosilylation or spinning-class polycarbosilane is precipitated or classified, and high-softening-point polycarbosilane is obtained; 2. melt spinning is conducted on the high-softening-point polycarbosilane, and continuous polycarbosilane fiber is obtained; 3. the continuous polycarbosilane is placed in the non-oxidative activity atmosphere to be subjected to non-melting treatment, and polycarbosilane non-melting fiber is obtained; 4. the polycarbosilane non-melting fiber is subjected to hard fire again after being subjected to hard fire or pyrolysis decarburization, and the low-oxygen-content silicon carbide fiber or near-stoichiometric silicon carbide fiber ...

User integral processing method and device, storage medium and electronic equipment

The invention discloses a user integral processing method and device, a storage medium and electronic equipment. Relates to the big data field. The method comprises the steps of obtaining user information of multiple target users from a service system to obtain multiple pieces of target user information, and inputting the multiple pieces of target user information into a target model to obtain sequence information of the multiple pieces of target user information; generating prompt information of each target user according to the current integral information and the sequence information, and sending the corresponding prompt information to each target user; and receiving instruction information returned by the target user, modifying the current integral information in the target user information according to the instruction information, and storing the modified target user information in the service system. Through the method and the device, the problem of low efficiency of a method for ...

Electric control box and air conditioner

The invention provides an electric control box and an air conditioner, the electric control box comprises an electric control box cover made of a heat dissipation material, the electric control box cover is provided with an arc concave surface part, and when the electric control box is installed in the air conditioner, the arc concave surface part on the electric control box cover can directly face an outdoor side fan of the air conditioner so as to achieve the heat dissipation effect on the electric control box; and the arc concave surface part can enable the airflow flowing on the electric control box cover to be in contact with more surfaces of the electric control box, so that the heat dissipation effect of the airflow on the electric control box is further improved. Besides, the arc-shaped concave surface part on the electric control box cover can also face the water beating ring of the air conditioner, so that water in the water beating ring can flow to the arc-shaped concave surface ...

P-type polycrystalline silicon/AlGaN heterojunction depletion mode HEMT device and preparation method thereof

The invention discloses a P-type polycrystalline silicon/AlGaN heterojunction depletion mode HEMT device and a preparation method thereof. The device comprises a substrate, a P-type polycrystalline silicon/AlGaN heterojunction depletion mode HEMT device, a The undoped GaN layer is arranged above the substrate; the first AlGaN layer which is not doped is arranged on the GaN layer; the second AlGaN layer is arranged above the first AlGaN layer and contains Si doping; the P-type polycrystalline silicon layer is arranged on the second AlGaN layer, and the P-type polycrystalline silicon layer and the second AlGaN layer form a heterojunction; the gate dielectric layer is arranged above the second AlGaN layer and coats the periphery of the polycrystalline silicon layer; and a gate electrode, a source electrode, and a drain electrode. The P-type polycrystalline silicon and the Si-doped second AlGaN layer form a heterojunction and form a built-in electric field at the same time, and when negative ...

Method for synthesizing high-ceramic-yield polycarbosilane

The invention discloses a method for synthesizing high-ceramic-yield polycarbosilane. The method comprises the following steps: mixing polycarbosilane of which the molecular weight is 500-1,500 with an allyl compound according to the proportion 100:(12-4); dissolving the mixture into dimethylbenzene; putting into a reaction vessel; adding an organic lithium reagent; heating under the protection of protection gas for reacting; controlling the highest reaction temperature at 100-150 DEG C; preserving heat for reacting for 2-8 hours; after finishing the reaction, filtering insoluble substances; removing a solvent by evaporating to obtain the high-ceramic-yield polycarbosilane. The method has the characteristics of easiness in controlling of the reaction conditions, simple and convenient steps, self-crosslinking performance of a product, and adjustable Si-H and allyl content. The method can be used for preparing liquid-state or solid-state high-ceramic-yield polycarbosilane conveniently.

Three-phase voltage sensor with isolation

The invention discloses a three-phase voltage sensor with isolation, which is used for realizing measurement of three-phase voltage and zero-sequence voltage, and comprises a first high-voltage arm, a first low-voltage arm and a second low-voltage arm which are arranged at an A phase; the second high-voltage arm, the third low-voltage arm and the fourth low-voltage arm are arranged at the B phase; the third high-voltage arm, the fifth low-voltage arm and the sixth low-voltage arm are arranged at the C phase; the first voltage transformer is arranged at the A phase; the second voltage transformer is arranged at the B phase; and the first voltage transformer, the second voltage transformer and the third voltage transformer realize zero-sequence voltage series connection of the A phase, the B phase and the C phase and are used for measuring the zero-sequence voltage.

GaN substrate transistor device and preparation method thereof

The invention discloses a GaN substrate transistor device and a preparation method thereof, and the GaN substrate transistor device comprises a GaN substrate which is provided with a first surface and a second surface; the SiNx thin film is formed on the first surface of the GaN substrate; the gate electrode is formed on the second surface of the GaN substrate; the Te material layer is formed on the surface of the SiNx thin film; a source electrode formed on the Te material layer; and the drain electrode is formed on the Te material layer. According to the GaN device, the dielectric constant of the SiNx thin film is higher than that of SiO2, electrons can be prevented from being gathered on the gate layer under the action of an applied electric field, leakage of gate current can be effectively reduced, and the breakdown resistance and the stability of the GaN device are improved; according to the transistor formed by GaN and Te, the Te material has high carrier mobility and has a polarization ...

Healthy energy-saving water dispenser

The invention discloses a healthy energy-saving water dispenser, which has the aims of health and energy conservation, carries out reconstruction of a water dispenser and design of control logic basedon a programmable logic device, is designed for users of households and offices, and adopts various technology to furthest meet the requirements of different users. The water dispenser comprises three water tanks orderly connected in series, pipes connected with the three water tanks, and controllers, wherein the first water tank (1) is a water inlet end and is used for accommodating raw water which is not heated; the second water tank (2) is used for boiling water, directly boils the raw water injected into the water tank during use, cuts off a power supply after the raw water is boiled andwaits for next injected water; the third water tank (3) is provided with a water outlet, has the function of heat insulation, is provided with a multi-shift adjustable water temperature controller, ispumped ...

High-current depletion type HEMT device and preparation method thereof

The invention discloses a large current depletion type HEMT device and a preparation method thereof, and the device comprises a substrate; the GaN buffer layer is located on the upper surface of the substrate; the U-GaN layer is located on the upper surface of the GaN buffer layer; the AlN insertion layer is located on the upper surface of the U-GaN layer; the AlGaN layer is located on the upper surface of the AlN insertion layer; the gate dielectric layer is located on the upper surface of the AlGaN layer, a first contact hole and a second contact hole which extend to the AlGaN layer are formed in the gate dielectric layer, and the gate dielectric layer is Al2O3; a source electrode formed on the first contact hole; the drain electrode is formed on the second contact hole; the gate electrode is formed on the gate dielectric layer; the AlGaN layer comprises a non-doped layer located at the lower part and a doped layer located at the upper part, and the doped layer is subjected to Si atom ...

Air conditioner outdoor unit, air conditioner and control method of air conditioner

The invention provides an air conditioner outdoor unit, an air conditioner and a control method of the air conditioner. The air conditioner outdoor unit comprises a machine shell, an outdoor heat exchanger, an outdoor fan, a shutter assembly and a driving part, the outdoor heat exchanger and the outdoor fan are both arranged in the machine shell, the outdoor heat exchanger is located on the air outlet side of the outdoor fan, and an outdoor air inlet and an outdoor air outlet are formed in the machine shell; the shutter assembly is arranged at the outdoor air outlet and comprises a connecting rod and a plurality of blades, one end of each blade is rotationally connected with the connecting rod, the other end of each blade is rotationally connected with the machine shell, and the driving part can drive the connecting rod to reciprocate in the first direction so that the blades can rotate relative to the machine shell to adjust the air outlet direction of the outdoor air outlet. The two ends ...

SiCN ceramic fiber with rich interface phase as well as preparation method and application of SiCN ceramic fiber

The invention discloses a SiCN ceramic fiber with rich interface phases and a preparation method and application thereof.The preparation method comprises the steps that a precursor containing a Si-N main chain and a precursor containing a Si-C main chain serve as raw materials, and a bi-component precursor polymer with rich interface bonding is obtained by means of the similar and compatible characteristics and complementary reaction activity of the two precursors; the precursor is subjected to the steps of melt spinning, radiation non-melting, high-temperature pyrolysis and the like, and the SiCN ceramic fiber with the rich interface phase is prepared. The double-component precursor used in the preparation method provided by the invention is relatively low in air sensitivity, the fiber preparation process flow is easy to simplify, and the fiber preparation cost is reduced; rich interface phases can form more polarization loss sites, so that the SiCN fiber has excellent electromagnetic ...

Comb tooth type automobile carrier and mechanical equipment for parking automobile

The invention discloses a comb tooth type automobile carrier and mechanical equipment for parking an automobile. The comb tooth type automobile carrier comprises an automobile frame, a comb tooth frame, traveling mechanisms and jacking mechanisms; the comb tooth frame is positioned on the automobile frame and is connected to the automobile frame in a liftable manner; the traveling mechanisms are connected to two sides of the automobile frame and are opposite to each other; each jacking mechanism is connected to the comb tooth frame and comprises at least one jacking driving portion and jacking transmission portions, and the jacking transmission portions are connected to the jacking driving portions; the jacking transmission portions comprise first stay rods and second stay rods which are respectively connected to transmission elements and shells of the jacking driving portions, an output direction of each first stay rod is opposite to an output direction of the corresponding second stay ...

Device for automatically cleaning glue spraying head of gluing machine

The invention relates to the technical field of gluing machine cleaning equipment, and particularly discloses a gluing machine glue spraying head automatic cleaning device which comprises a glue spraying head, a monitor, a cleaning agent spraying head, a nitrogen pipeline and a baffle. The photoresist spraying device has the beneficial effects that the monitor is installed on one side of the photoresist spraying head, the cleaning agent spraying head and the nitrogen pipeline are sequentially installed on the other side of the photoresist spraying head, the baffle is installed on the side, away from the cleaning agent spraying head, of the photoresist spraying head, and whether residual photoresist exists at the photoresist spraying head or not can be detected in real time through the monitor; according to the invention, the step of manual inspection can be omitted, the automation of the production line is improved, the working efficiency is improved, through the cooperation of the automatic ...

Oxygen-free non-melting Polycarbosilane fiber preparation method and device

The invention provides an oxygen-free non-melting polycarbosilane fiber preparation method and device. The method comprises the following steps: immersing polycarbosilane fibers into a solution of a peroxide or azo-compound free radical initiator; drying and putting the polycarbosilane fibers into a heating device; vacuumizing and replacing nitrogen or argon; gasifying silane containing vinyl or silazane containing vinyl and circulating in the device; carrying out two-section temperature rising heating under an axis-heating temperature field; and cooling to a room temperature to obtain oxygen-free non-melting polycarbosilane fibers. The invention further provides the oxygen-free non-melting polycarbosilane fiber preparation device which comprises a gasification chamber (1), a circulating fan (2), a reverse spoiler (3), an axis heating circular roller (4) and a tube furnace (5). The oxygen-free non-melting polycarbosilane fiber preparation method and device have the advantages that a chemical ...

Intelligent street lamp control device based on low-carbon intelligent community

The utility model discloses an intelligent street lamp control device based on a low-carbon intelligent community. The control device comprises a horizontal stabilizing bottom plate, the top of the horizontal stabilizing bottom plate is rotationally connected with a rotating shaft through a rotating bearing, a fixing sleeve is fixedly connected to the top of the horizontal stabilizing bottom plateand located outside the rotating shaft, and a first bevel gear is fixedly connected to the surface of the rotating shaft. The utility model discloses an intelligent street lamp control device based on a low-carbon intelligent community. Ice and snow are broken and fall through expansion of the air bag. Therefore, the snow and ice removing effect is quickly realized; damage to the device due to excessive ice and snow is effectively prevented, through combined arrangement of a rotating shaft, a first bevel gear, a second bevel gear, a reinforcing plate and a rotating handle, residual snow ice on ...

Preparation method of fluorescent powder

The invention discloses a preparation method of fluorescent powder. The preparation method comprises the following steps: providing pure CaS: Eu; the preparation method comprises the following steps: respectively adding oleic acid OA, pure CaS: Eu and oleylamine OAm into 1-octadecene C18H36, and stirring for a first time period to obtain a first mixed solution; 3-methylacryloyloxy propyl trimethoxy silane C10H20O5Si and diphenyl silane glycol C12H12O2Si are respectively dispersed into 1-octadecene C18H36, so that a second mixed solution is obtained, and the reaction time is a second time period; and adding the second mixed solution into the first mixed solution, adding a photoinitiator BDK into the first mixed solution and the second mixed solution after the reaction, and keeping for a third time period to obtain the Si compound coating modified fluorescent powder CaS: Eu. The fluorescent powder CaS: Eu modified by the Si compound coating prepared by the method is a silicon compound CaS ...

Enhanced MOSFET device and preparation method thereof

The invention discloses an enhanced MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor) device, which comprises a substrate; the N-type GaN buffer layer is positioned above the substrate; the U-type GaN layer is positioned above the N-type GaN buffer layer; the P type GaN layer is positioned above the U type GaN layer; the N type Poly-Si layer is positioned above the P type GaN layer; the gate dielectric layer is positioned above the N type Poly-Si layer; the grid electrode is positioned above the gate dielectric layer; the source electrode is positioned above the N type Poly-Si layer; the drain electrode is located above the U-shaped GaN layer, and the drain electrode and the source electrode are located on the two sides of the grid electrode respectively. The N-type Poly-Si layer is directly formed on the U-type GaN layer with low carrier concentration, then the drain electrode is formed on the N-type Poly-Si layer, the structure is equivalent to forming a diffusion region of the ...

Wide-gate enhanced HEMT device and preparation method thereof

The invention discloses a wide-gate enhanced HEMT device and a preparation method thereof, and the wide-gate enhanced HEMT device comprises a substrate; the U-GaN buffer layer is located on the upper surface of the substrate; the P-GaN layer is located on the surface of the U-GaN buffer layer; the U-GaN channel layer is located on the surface of the P-GaN layer; the AlGaN barrier layer is located on the surface of the U-GaN channel layer and is provided with a first groove and a second groove; a source electrode formed in the first trench; a drain electrode formed in the second trench; the gate dielectric layer is located on the surfaces of the AlGaN barrier layer, the source electrode and the drain electrode; and the wide gate electrode is formed on the surface of the gate dielectric layer. According to the invention, the structure that the P-GaN is arranged on the upper layer is not adopted, but the P-GaN is arranged below the AlGaN barrier layer, so that the damage to the AlGaN barrier ...

Method for stripping gallium nitride epitaxy by confocal laser

The invention discloses a method for stripping gallium nitride epitaxy by confocal laser, which comprises the following steps: preparing a substrate, depositing an etching layer and a gallium nitride layer on the substrate, providing a first laser light path and a second laser light path, and enabling the first laser light path and the second laser light path to form a focus point of the confocal laser on the etching layer to guide an etching behavior; the curvature radius of an etching layer is determined, and the advancing route of a focus point is formulated as a path to be etched; calculating a path of a focus point and an etching area, wherein the path of the focus point needing to be generated is a required focusing track; and the angle change rate of the light path is calculated, so that the focusing track is consistent with the to-be-etched path. By respectively changing the light emitting angles of the first laser light path and the second laser light path, a focusing point of ...

Femoral compression haemostat

The invention discloses a femoral artery compression hemostat, which is characterized in that the top of a bracket is connected with a height adjustable pressure lever, the bottom end of the pressure lever is sleeved with an elastic liquid storage bag, one side of the liquid storage bag is provided with a nozzle, and an injection tube is inserted in the nozzle. When the femoral artery compression hemostat is used, liquid is injected into the injection tube through modes of holding a pipet bulb or a liquid injector or other injection modes; and after the liquid is communicated with the elastic liquid storage bag, the liquid is pressed into the liquid storage bag, and the injection tube is folded in half and clipped by a clip to prevent the liquid from flowing back. The liquid storage bag is pressed on a hemostasis point to achieve the aim of hemostasis. Because the liquid storage bag has elasticity and small heat absorption coefficient, the pressure is easily controlled during liquid injection ...

Preparation method for liquid polycarbosilane precusor

The present invention discloses a preparation method for liquid polycarbosilane precursor, which comprises the following steps: taking alkoxy halogenosilane, methylenehalide and magnesium as raw materials; mixing the alkoxy halogenosilane, the methylenehalide and the magnesium according to the ratio of 1:0.5-5:1-10; performing heat preservation and polymerization reaction on the mixture at a temperature of between 50 and 150 DEG C for 20 to 48 hours; reducing the temperature of the mixture and adding a reducing agent; raising the temperature to between 50 and 150 DEG C; performing heat preservation on the mixture for 12 to 36 hours for hydrogen reduction; reducing the temperature and performing acidification on the mixture; adding alkane and extracting an organic layer after solid-liquid separation; forming the organic layer by reduced pressure distillation; and cooling the mixture to room temperature to obtain the liquid polycarbosilane precursor. The preparation method has low cost of ...

Satellite navigation co-frequency multi-system signal generation system and method

The invention discloses a satellite navigation co-frequency multi-system signal generation system, which comprises a radio frequency circuit module and an FPGA (Field Programmable Gate Array) module, one end of a GNSS (Global Navigation Satellite System) antenna is coupled with one end of the radio frequency circuit module, and the other end of the radio frequency circuit module is coupled with one end of the FPGA module; the radio frequency circuit module receives a signal transmitted by the GNSS antenna and carries out signal processing, intermediate frequency filtering processing, signal amplification processing and signal conversion processing on the signal to obtain a digital signal; the FPGA module receives the digital signal generated by the radio frequency circuit module and performs digital filtering to obtain a filtered first digital signal, and the first digital signal is subjected to distributed sampling to obtain second digital signals with different frequencies. The system ...

GaN HEMT device and preparation method thereof

The invention discloses a GaN HEMT (High Electron Mobility Transistor) device and a preparation method thereof, and the GAN HEMT device comprises an Al2O3 substrate which is provided with a first surface and a second surface; the intrinsic GaN epitaxial layer is located on the first surface of the Al2O3 substrate; the AlGaN epitaxial layer is located on the surface of the intrinsic GaN epitaxial layer; the h-BN gate dielectric layer is located on the surface of the AlGaN epitaxial layer; the gate metal electrode is located on the surface of the h-BN gate dielectric layer; the source metal electrode is located on the surface of the AlGaN epitaxial layer; the drain metal electrode is located on the surface of the AlGaN epitaxial layer, and the drain metal electrode and the source metal electrode are located on the two sides of the h-BN gate dielectric layer respectively. The gate dielectric layer is made of the two-dimensional material h-BN, and the contact between the h-BN gate dielectric ...

Preparation method for prestressed high-strength concrete octagonal pile

The invention provides a prestressed high-strength concrete octagonal pile, belongs to the field of building, and in particular relates to a driven fender pile applied to deep foundation pit engineering. The prestressed high-strength concrete octagonal pile comprises concrete, a reinforcing cage, and an end plate, wherein the shape of the end plate is round-angle square; diameters of circular arc segments of round angles are equal and are 1.1 to 1.3 folds of the side length of the square, preferably 1.2 folds; central angles of the circular arc segments are 13 degrees to 17 degrees, and the length of a straight-line segment is 0.3 to 0.5 fold of the side length of the square; the grade of the concrete strength is higher than C40; and a main reinforcement of the reinforcing cage is arranged on a circle taking a centroid of the end plate as a center or on the square. The prestressed high-strength concrete octagonal pile greatly reduces the problem of stress concentration and the damage to ...

Method for preparing multicomponent nitride ceramic precursor

The present invention provides a preparation method of multi-nitrogen ceramics precursor. In the preparation method, the halides of the target element and small molecules disilazane are used as starting materials and are mixed according to a certain ratio; the temperature is raised to be between 125 and 500 DEG C and is maintained for a certain period; after the temperature is lowered, the mixtureis processed through vacuum distillation and is cooled to be at the room temperature; thus the nitrogen ceramics precursor of the target element can be prepared. The preparation method has the advantages of low costs in raw materials, reliable source, simple process of reaction, higher synthetic yield, wide applicability for preparing a ceramic system of a plurality of nitrides, simple technology, and low cost in manufacture. The by-product R<2>3SiR<3> can be recycled, which is conducive to the environmental protection.

Method for preparing SiBN(C) ceramic fibre

The present invention provides a preparation method of SiBN(C) ceramic fiber. In the preparation method, silicon haloganide, boron halide and disilazane of small molecules are used as starting materials and are mixed according to a certain ratio; the temperature is raised to be between 150 and 500 DEG C and is maintained for a certain period; after the temperature is lowered, the mixture is processed through vacuum distillation and is cooled to be at the room temperature; thus the precursory of solid boron-containing polysilazane can be prepared and is then used for fusing filature to prepareprecursor fiber of SiBN(C) ceramic fiber. Compared with the existing method, the preparation method has the advantages of low costs in raw materials, reliable source, higher synthetic yield, simple process and one-step preparation of the precursor; the fiber of the precursor is treated through chemical crosslinking that has high efficiency and is conducive to the integrative operation of spinning, non-melting ...

Preparation method of oxide ceramic coating layer on surface of silicon carbide fiber

The invention discloses a preparation method of an oxide ceramic coating layer on a surface of a silicon carbide fiber. The preparation method comprises the following steps: (1) the silicon carbide fiber is removed glue for cleaning; (2) the silicon carbide fiber is put in an ALD reaction chamber to repeatedly vacuumize and replace nitrogen for three times; (3) a reaction precursor is selected according to the type of a deposited oxide coating layer; and the parameters of a deposition process are set; (4) precursor steam is guided in the ALD reaction chamber under the carrying of nitrogen or argon; (5) the reaction chamber is blown by the nitrogen or argon; (6) oxygen source steam is guided in the ALD reaction chamber under the carrying of the nitrogen or argon; (7) the reaction chamber is blown by the nitrogen or argon; (8) the steps (4)-(7) are repeated until the needed thickness of the coating layer is deposited; and (9) the coating layer is put in a high-temperature tube furnace, and ...

System communication between computer systems

SENDING METHOD AND DEVICE FOR 8-ANTENNA DOWNLINK CONTROL CHANNEL

A method for an 8-antenna downlink control channel, is described. the method includes virtualizing a first pair and a third pair of dual-polarized antennas as a first port, and virtualizing a second pair and a fourth pair of dual-polarized antennas as a second port. The weighted values of the broadcast right of the four antennas in the first port satisfy that the weighted value of one antenna is +1 and the weighted values of the other three antennas are −1, or the weighted value of one antenna is −1 and the weighted values of the other three antennas are +1, and weighted values of the broadcast right of the four antennas in the second port satisfy that the weighted value of one antenna is +1 and the weighted values of the other three antennas are −1. 1. A method of transmitting a downlink control channel on 8 antennas , comprising:for the 8 antennas used by a base station for downlink transmission, virtualizing 4 antennas among the 8 antennas into a first port and virtualizing the other 4 antennas among the 8 antennas into a second port,wherein broadcast weights of the 4 antennas of the first port satisfy that the weight of one of the antennas is +1 and the weights of the remaining three antennas are −1, or the weight of one of the antennas is −1 and the weights of the remaining three antennas are +1, andbroadcast weights of the 4 antennas of the second port satisfy that the weight of one of the antennas is +1 and the weights of the remaining three antennas are −1, or the weight of one of the antennas is −1 and the weights of the remaining three antennas are +1; andthe base station transmitting a downlink control signal through the first port and the second port.2. The method of claim 1 , wherein the first and third pairs of dual-polarized antennas among the 8 antennas are virtualized into the first port and the second and fourth pairs of dual-polarized antennas among the 8 antennas are virtualized into the second.3. The method of claim 1 , whereinthe first and ...

COMMODITY DATA PROCESSING DEVICE AND CONTROL METHOD

According to one embodiment, a commodity data processing device identifies a purchaser who has visited a store. The commodity data processing device acquires order information on a commodity ordered by the purchaser. The commodity data processing device acquires purchase information related to a commodity purchased by the purchaser at the store. The commodity data processing device provides a service when a condition of the service is satisfied from the order information and the purchase information. 1. A commodity data processing device , comprising:an identification component for identifying a purchaser who visits a store;a first acquisition component for acquiring order information on a first commodity ordered by the purchaser previously at an internet site of the store;a second acquisition component for acquiring purchase information on a second commodity purchased by the purchaser at the store; anda provision component for providing a price discount to the second commodity when a conclusion condition is satisfied from the order information acquired by the first acquisition component and the purchase information acquired by the second acquisition component.2. The device according to claim 1 , further comprising:a search component for searching for a commodity satisfying the condition from the order information acquired by the first acquisition component; anda notification component for notifying information relating to the commodity detected by the search component.3. The device according to claim 2 , whereinthe notification component notifies an information terminal used by the purchaser in the store.4. The device according to claim 1 , further comprising:a determination component for determining whether or not to provide a service based on a price of the first commodity when the purchaser orders the first commodity, whereinthe provision component provides the service when the condition of the service is satisfied and the determination component determines to ...

COMB-SHAPED STRUCTURE POLYBENZIMIDAZOLE ANION EXCHANGE MEMBRANE WITH HIGH CONDUCTIVITY AND PREPARATION METHOD THEREOF

The present invention belongs to the field of alkaline polymer electrolyte membranes, and relates to a comb-shaped structure polybenzimidazole anion exchange membrane with high conductivity and preparation method thereof. In the invention, firstly, polybenzimidazole is grafted with the non-cationic side chains to the max grafting rate to synthesize the de-protonated comb-shaped polybenzimidazole material, avoiding the N—H in benzimidazole forms ionic binding with cationic functional groups, which will reduce the reactivity and mobility of cationic groups; then react de-protonated comb-shaped polybenzimidazole with quaternization reagent to attach the pendent side chain with cationic functional groups, making it easy to aggregate to form ion clusters and hydrophilic/hydrophobic microphase separation. The anion exchange membrane prepared in this invention has excellent conductivity, mechanical properties and alkaline stability. 1. (canceled)2. (canceled)4. The preparation method of the comb-shaped structure polybenzimidazole anion exchange membrane with high conductivity according to claim 3 , wherein deprotonation refers to grafting polybenzimidazole with the side chain without cationic groups to max grafting rate claim 3 , thereby removing all N—H protons from the main chain of polybenzimidazole claim 3 , and each polybenzimidazole repeat unit is grafted with a functional side chain to form the comb-shaped structure.5. The preparation method of the comb-shaped structure polybenzimidazole anion exchange membrane with high conductivity according to claim 3 , wherein the acid binding agent is one or more of sodium hydroxide claim 3 , potassium hydroxide claim 3 , sodium carbonate claim 3 , sodium hydroxide or potassium hydride; the quaternization reagent is one or more mixtures of trimethylamine claim 3 , 1-methylimidazole claim 3 , 1-dimethylimidazole claim 3 , N-methylpiperidine or N-methylmorpholine.6. The preparation method of the comb-shaped structure ...

COMMODITY DATA PROCESSING APPARATUS AND CONTROL METHOD BY THE SAME

A commodity data processing apparatus includes a communication interface connected to a network, and a processor that executes a program that includes an acquiring module that acquires order information relating to an ordered commodity, a specifying module that identifies a purchaser who comes to a store, and a notifying module that notifies the identified purchaser through the communication interface that the ordered commodity is in stock at the store if the ordered commodity is in stock at the store. 1. A commodity data processing apparatus , comprising:a communication interface connected to a network; and an acquiring module that acquires order information relating to an ordered commodity;', 'a specifying module that identifies a purchaser who comes to a store; and', 'a notifying module that notifies the identified purchaser through the communication interface that the ordered commodity is in stock at the store if the ordered commodity is in stock at the store., 'a processor that executes a program that includes2. The commodity data processing apparatus according to claim 1 , wherein the program further includes:a registration module that compares a first price of the ordered commodity at a time the purchaser ordered the commodity and a second price of the ordered commodity when the purchaser is at the store and selects the lower of the first and second prices when registering sales information relating to the ordered commodity.3. The commodity data processing apparatus according to claim 2 , whereinthe notifying module notifies the purchaser that the commodity is being sold at the selected price.4. The commodity data processing apparatus according to claim 3 , whereinan information terminal is used by the identified purchaser, andthe specifying module identifies the purchaser based on information input into the information terminal.5. The commodity data processing apparatus according to claim 4 , whereinthe notifying module sends a notification to the ...

Battery cover for a mobile phone

Sending method and device for 8-antenna downlink control channel

A sending method and device for an 8-antenna downlink control channel, comprising: for eight antennas used for downlink transmission of a base station, virtualizing a first pair and a third pair of dual-polarized antennas as a first port, and virtualizing a second pair and a fourth pair of dual-polarized antennas as a second port, wherein weighted values of the broadcast right of the four antennas in the first port satisfy that the weighted value of one antenna is +1 and the weighted values of the other three antennas are -1, or the weighted value of one antenna is -1 and the weighted values of the other three antennas are +1, and weighted values of the broadcast right of the four antennas in the second port satisfy that the weighted value of one antenna is +1 and the weighted values of the other three antennas are -1, or the weighted value of one antenna is -1 and the weighted values of the other three antennas are +1; and the base station sending downlink control signals through the first port and the second port. The method can expand the coverage of the downlink control channel of the base station using eight antennas.

Cover assembly of mobile phone

A cover assembly ( 1 ) of a mobile phone includes a front cover ( 2 ) and a back cover ( 3 ). The front cover defines a front microphone cavity ( 4 ) at an end thereof with at least one opening formed in a wall of said front microphone cavity. The back cover defines a back microphone cavity ( 5 ) at an end thereof, corresponding in position to that of the front microphone cavity in the front cover. At least one opening is formed in a wall of said back microphone cavity. Said front and back covers are assembled together to form the cover assembly, resulting in a combination of said front and back cavities to create a combined microphone cavity ( 90 ) for receiving a microphone ( 70 ) therein, the combined cavity having at least one aperture ( 46 ) at its lower end, thereby improving voice quality and structural integrity of the mobile phone.

Battery cover assembly for portable electronic device

A battery cover assembly includes a battery cover ( 3 ) defining a pair of guide rails ( 326 ) therein, a connecting member ( 2 ), a housing ( 1 ) defining a receiving slot ( 164 ) and at least a battery-receiving compartment ( 194 ), a plurality of springs ( 5 ), and an antenna rod ( 4 ). The connecting member is slidingly received in the guide rails along a lateral direction, and the antenna rod inserts into the receiving slot through the connecting member and the springs such that the battery cover can rotate about the antenna rod. When the battery cover is rotated downwardly to the housing, a force is required to press the battery cover down upon the housing, and then inwardly along a direction toward the antenna rod until locking projections ( 302 ) on the cover catch in troughs ( 182 ) defined in the housing.

Computer network system, computer system, method for communication between computer systems, method for measuring computer system performance, and storage medium

To provide a technique for connection from a conventional personal computer having no terminal ID to a service site for mobile phone terminals. A simulation server 4 is set as the proxy server for a personal computer 5 or 9. In the proxy server (simulation server 4 ), terminal ID's suitable for the format are generated, and a cookie is generated for each personal computer or session. The terminal ID's and cookies are related and stored as a hash table 10. In the proxy server 4, a terminal ID is appended to a request from the personal computer 5 or 9, and the request is transferred to an i-mode server 3 along with the terminal ID.

Comb-shaped structure polybenzimidazole anion exchange membrane with high conductivity and preparation method thereof

The present invention belongs to the field of alkaline polymer electrolyte membranes, and relates to a comb-shaped structure polybenzimidazole anion exchange membrane with high conductivity and preparation method thereof. In the invention, firstly, polybenzimidazole is grafted with the non-cationic side chains to the max grafting rate to synthesize the de-protonated comb-shaped polybenzimidazole material, avoiding the N—H in benzimidazole forms ionic binding with cationic functional groups, which will reduce the reactivity and mobility of cationic groups; then react de-protonated comb-shaped polybenzimidazole with quaternization reagent to attach the pendent side chain with cationic functional groups, making it easy to aggregate to form ion clusters and hydrophilic/hydrophobic microphase separation. The anion exchange membrane prepared in this invention has excellent conductivity, mechanical properties and alkaline stability.

Testing system of gis electronic mutual inductor and method therefor

Service management system, token issuing server, and method for token issuing server

According to one embodiment, a service management system includes a relay device to relay communications between a client and a server providing a service that comprises one or more microservices. The relay device generates an authentication token, authenticates the authentication token when included in a service request from the client, and issues a command to the server to execute a service requested by the client after the authentication token is successfully authenticated. A token issuing server is provided to communicate with the relay device and the client and includes a storage unit and a processor. The processor is configured to store an access key issued by the relay device in the storage unit, acquire the authentication token from the relay device by using the access key, and send the acquired authentication token to the client in response to a token request from the client.

Verfahren und vorrichtung zur prüfung eines inhaltservers

Low temperature co-fired dielectric material and preparation method thereof

Disclosed is a low temperature co-fired dielectric material with an adjustable dielectric constant, wherein it comprises a zirconia main phase and a silicon-based amorphous filler, a weight ratio of the zirconia main phase to the silicon-based amorphous filler is 40-65: 35-60; a weight percentage of SiO2. in the silicon-based amorphous filler is ≥50%. The dielectric constant of low temperature co-fired dielectric material can be continuously adjusted in a wide range of 7-12, the dielectric loss can be as low as 0.1% at 1 MHz. The material system can be sintered at 800-900° C. and co-fired with silver electrode. It can be used as the low temperature co-fired dielectric material. The invention also discloses a method for preparing the low temperature co-fired dielectric material with an adjustable dielectric constant.

Device control apparatus and control method

According to one embodiment, a device control apparatus includes a communication interface connectable to several client terminals via a network and a local device interface connectable to several peripheral devices. The device control apparatus functions as registration unit configured to receive an occupation request for a peripheral device from a client terminal and then register the peripheral device for which the occupation request has been received as occupied by the client terminal if the peripheral device is not registered as occupied by another client terminal. A setting unit sets a release time for releasing the occupation of the registered peripheral device, and an update unit updates the release time whenever communication occurs between the registered peripheral device and the client terminal. A release unit releases the registered occupation of the peripheral device once the release time elapses.

商品管理装置及び商品管理プログラム

【課題】売れ行きのペースが早い商品に対して的確に補充を指示し、欠品による販売チャンスロスを未然に防ぐ。【解決手段】商品管理装置は、商品毎に陳列数の変化を検出する。そして商品管理装置は、陳列数の変化が検出された商品の減少方向への変化の度合いを判定する。その結果、判定手段により減少方向への変化の度合いが規定よりも大きいと判定された商品について、商品管理装置は補充アラートを出力する。【選択図】 図９

Service management system, token issuing server, and method for token issuing server

According to one embodiment, a service management system includes a relay device to relay communications between a client and a server providing a service that comprises one or more microservices. The relay device generates an authentication token, authenticates the authentication token when included in a service request from the client, and issues a command to the server to execute a service requested by the client after the authentication token is successfully authenticated. A token issuing server is provided to communicate with the relay device and the client and includes a storage unit and a processor. The processor is configured to store an access key issued by the relay device in the storage unit, acquire the authentication token from the relay device by using the access key, and send the acquired authentication token to the client in response to a token request from the client.

サービス管理システム、トークン発行サーバ及びそのプログラム

【課題】中継装置の性能が低下するのを防ぐ。【解決手段】トークン発行サーバは、アクセスキー記憶部と、トークン取得部と、トークン発行部とを備える。アクセスキー記憶部は、中継装置が発行するアクセスキーを記憶する。トークン取得部は、アクセスキー記憶部で記憶したアクセスキーを用いて中継装置から認証用トークンを取得する。トークン発行部は、クライアントからのトークン要求に応じて、トークン取得部で取得した認証用トークンを当該クライアントに発行する。中継装置は、トークン生成部と、トークン認証部と、サービス処理部とを備える。トークン生成部は、認証用トークンを生成する。トークン認証部は、クライアントからのサービス要求に含まれる認証用トークンを認証する。サービス処理部は、トークン認証部において認証用トークンの認証が成立すると、サービス提供サーバに対し、クライアントから要求のあったサービスの実行を指令する。【選択図】 図７

Device control apparatus and control method

According to one embodiment, a device control apparatus includes a communication interface connectable to several client terminals via a network and a local device interface connectable to several peripheral devices. The device control apparatus functions as registration unit configured to receive an occupation request for a peripheral device from a client terminal and then register the peripheral device for which the occupation request has been received as occupied by the client terminal if the peripheral device is not registered as occupied by another client terminal. A setting unit sets a release time for releasing the occupation of the registered peripheral device, and an update unit updates the release time whenever communication occurs between the registered peripheral device and the client terminal. A release unit releases the registered occupation of the peripheral device once the release time elapses.

Device control apparatus and control method

According to one embodiment, a device control apparatus includes a communication interface connectable to several client terminals via a network and a local device interface connectable to several peripheral devices. The device control apparatus functions as registration unit configured to receive an occupation request for a peripheral device from a client terminal and then register the peripheral device for which the occupation request has been received as occupied by the client terminal if the peripheral device is not registered as occupied by another client terminal. A setting unit sets a release time for releasing the occupation of the registered peripheral device, and an update unit updates the release time whenever communication occurs between the registered peripheral device and the client terminal. A release unit releases the registered occupation of the peripheral device once the release time elapses.

Store management system, electronic receipt system, and store management method

According to an embodiment, a store management system includes a store entry management device and a sales management device. The store entry management device reads identification data, of a shopper, for using the electronic receipt service from an information terminal of a shopper who wants to enter the store. The sales management device causes the store entry management device to permit the shopper to enter the store when the settlement data can be acquired based on the read shopper identification data.

High-performance heterojunction and preparation method thereof

The present invention relates to the field of microelectronic devices, and in particular to a high-performance heterojunction and a preparation method thereof. The 5 high-performance heterojunction includes a heterogeneous P-N junction consisting of two-dimensional materials MoTez and two-dimensional materials InSe. In the present invention, a MoTez layer, an InSe layer, and a first Au electrode layer and a second Au electrode layer thereof cross to form a Van der Waals heterostructure in which different two-dimensional materials are artificially stacked. The high-performance 10 heterojunction has the advantages of a large optical responsivity, etc. Furthermore, the high-performance heterojunction has a simple structure, is easy to prepare, and is advantageous in large-scale production and application.

物流管理システム、物流管理装置及びそのプログラム

【課題】識別情報の関連付けを意識することなく物品のトレーサビリティを可能とする。【解決手段】物流管理システムは、物品の物流工程毎に物品の状態に係る情報を収集する複数の情報収集装置と、複数の情報収集装置がそれぞれ収集した物流工程毎の情報を取得するサーバとを含む。サーバは、１つの情報収集装置から取得した物流工程単位の情報からブロックデータを生成する。サーバは、ブロックデータのハッシュ値を算出する。サーバは、算出されたハッシュ値を、そのハッシュ値の元となるブロックデータに対応した物流工程の第１識別情報と関連付けて保持する。サーバは、生成されたブロックデータに、当該ブロックデータに対応した物流工程の１つ前の物流工程の第２識別情報と関連付けて保持されているハッシュ値を追加することでブロックデータを連結する。【選択図】 図５

Service management system, token issuing server, and method for token issuing server

According to one embodiment, a service management system includes a relay device to relay communications between a client and a server providing a service that comprises one or more microservices. The relay device generates an authentication token, authenticates the authentication token when included in a service request from the client, and issues a command to the server to execute a service requested by the client after the authentication token is successfully authenticated. A token issuing server is provided to communicate with the relay device and the client and includes a storage unit and a processor. The processor is configured to store an access key issued by the relay device in the storage unit, acquire the authentication token from the relay device by using the access key, and send the acquired authentication token to the client in response to a token request from the client.

High-performance heterojunction and preparation method thereof

The present invention relates to the field of microelectronic devices, and in particular to a high-performance heterojunction and a preparation method thereof. The 5 high-performance heterojunction includes a heterogeneous P-N junction consisting of two-dimensional materials MoTez and two-dimensional materials InSe. In the present invention, a MoTez layer, an InSe layer, and a first Au electrode layer and a second Au electrode layer thereof cross to form a Van der Waals heterostructure in which different two-dimensional materials are artificially stacked. The high-performance 10 heterojunction has the advantages of a large optical responsivity, etc. Furthermore, the high-performance heterojunction has a simple structure, is easy to prepare, and is advantageous in large-scale production and application.

V-shaped groove mos structure with hafnium oxide material as gate dielectric layer and preparation method thereof