Coaxial S-parameter phase standard device and design, implementation and calibration method thereof

The invention discloses a coaxial S parameter phase standard device and a design, implementation and calibration method thereof. The method comprises the following steps: S1, determining the type of a coaxial S-parameter phase standard device according to a working frequency band, and determining the inner diameter of an outer conductor and the outer diameter of an inner conductor of the coaxial S-parameter phase standard device; s2, determining a length value corresponding to phase change coverage of-180 degrees to + 180 degrees in the whole working frequency band as the length of a coaxial S parameter phase standard device; s3, performing physical dimension calibration on the inner diameter of the outer conductor, the outer diameter of the inner conductor and the length of the processed coaxial S parameter phase standard device; and S4, calculating a phase shift value corresponding to each frequency in the working frequency band, and setting the phase shift value as a standard value corresponding ...

Device design capable of automatically adjusting preheating position of cutting gun and application of device design

The invention relates to a device capable of automatically adjusting a preheating position of a cutting gun. The device comprises a motor, wherein a baffle block is arranged on an output shaft of the motor, a counting proximity switch is arranged on a speed reducer, and the other end of the output shaft of the motor is connected with the speed reducer; a cutting gun in-situ proximity switch is arranged on a frame of a cutting trolley, a distance X exists between the cutting gun in-situ of the cutting gun and the edge of a casting blank needing to be cut, and the whole device is controlled by a PLC (Programmable Logic Controller). According to the device disclosed by the invention, the problem that the cutting gun in-situ proximity switch needs to be frequently adjusted on line as the casting blank cannot be preheated due to misalignment between the edge of the casting blank and the preheating position of the cutting gun caused by uneven cooling and the like is solved, remote adjustment ...

Multi-frequency time sequence combined steady-stage visual evoked potential brain-computer interface method

The invention discloses a multi-frequency time sequence combined steady-stage visual evoked potential brain-computer interface method. The method comprises the following steps of: putting a measurement electrode on the head of a subject and connecting the measurement electrode with an electroencephalogram amplifier, a computer and a computer screen; and forming n different representation targets by using n stimulus frequencies, wherein n is an integer more than 1; and realizing the representation of the visual targets and the visual feedback of the subject by using the computer screen. The method improves the information transmission rate of the brain-computer interface by constructing a plurality of representation targets from a few stimulus frequencies, has the advantages of multiple representation targets and high specificity of the detection result, can realize communication between the disabled having normal mind but suffering from paralysis of the neuromuscular system and an external ...

Continuous casting tundish submerged nozzle baking method

Plate heat exchanger composite corrugated plate bind

The invention discloses a plate exchanger compound ripple lamella bundle. A plurality of ripple plates are folded to form a lamella bundle of the plate exchanger; the ripple plate is struck out of a plurality of rectangle compound ripples arranged by matrix on a flat plate, and each matrix unit comprises two layers of ripples of different height and different shapes. Ripples arranged in the outer circle have relatively high wave height and a relatively big pitch of waves with the top being a bearing part between plates, and the ripples of the outer circle are arranged in pairs and in parallel with the vertical axes of two pairs of ripples forming a rectangle. Ripples heave transversely arranged in the rectangle, vertical ripples subside, and one or a plurality of raised inner layer ripples of relatively small wave height is/are arranged between the ripples of the outer circle. The invention has the advantages that the invention has high efficiency and intensifies the heat transmitting; ...

Primer, probe, kit and method for detecting A, B and H5 subtype influenza virus by triple fluorescent quantitative RT-PCR

The invention discloses a primer, a probe and a detection kit containing the primer and the probe, which are used for detecting A type, B type and H5 subtype influenza viruses through triple fluorescence quantitative RT-PCR. The invention also discloses a method for executing fluorescence quantitative RT-PCR for A type, B type and H5 subtype influenza viruses by using the primer and the probe. The detection kit includes RT-PCR reaction buffer, Taq enzyme, inverse transcriptase, DEPC liquid, positive control and negative control. The process involves the steps of establishing a RT-PCR reaction system by using the primer and the probe, extracting DNA or RNA from a specimen to be detected, adding the extracted DNA or RNA into the aforesaid reaction system, setting reaction conditions, carrying out RT-PCR augmentation and fluorescence signal detection. The invention can identify A type, B type and H5 subtype influenza viruses in the detected specimen within 3-4 hours in a fast, exact, specific ...

Tool assisting in disassembling and assembling ball body of top-mounted ball valve

The tool comprises a fixed block, a middle flange bolt, a movable plate, a supporting strip, a pull rod and a guide rod, two through holes are formed in the upper end face of the fixed block and are connected with the middle flange bolt in a fastened mode, and three through holes are formed in the side end face of the fixed block; three through holes are machined in the side end face of the movable plate, two symmetrically-distributed guide rods are installed in the two through holes in the outer side of the movable plate respectively, a pull rod is installed in a middle hole, an arc-shaped groove is machined in the middle of the outer side face of the movable plate, two through hole grooves are machined in the two sides of the outer side face of the movable plate, and the supporting strip is fixedly connected with the movable plate. The device has the advantages that the device is convenient to disassemble and assemble and simple in structure, through hole grooves can be formed in the ...

Modularized discharging mechanism with inverted buckle for punching short pipe

The modularized discharging mechanism comprises a linear module, a sliding table and a carrying table, a first air cylinder and a mounting base are arranged on the sliding table, a piston rod of the first air cylinder is fixedly connected with the mounting base, a first adjusting groove is formed in the lower end of the mounting base, and a plurality of back-off collet chucks are fixedly connected to the first adjusting groove through screws; the back-off collet comprises a barrel, a sliding rod and a check block, the sliding rod and the check block are slidably connected to the barrel, one end of the sliding rod extends out of the barrel to be provided with a rotating shaft, the sliding rod is sleeved with a first spring, a second air cylinder is arranged on the carrying table, a supporting plate is fixedly connected to a piston rod of the second air cylinder, and a second adjusting groove is formed in the side wall of the carrying table. The automatic unloading device has the beneficial ...

Plate type air cooling system

The invention discloses a plate type air cooling system comprising a plurality of plate type air coolers sequentially connected through pipelines. Each plate type air cooler comprises a bracket, a plate bundle, a steam pipe, a steam distribution box and a condensation water collecting box, wherein the plate bundle, the steam pipe, the steam distribution box and the condensation water collecting box are arranged on the bracket; the plate bundle is formed by sequentially overlapping a plurality of plates with concave-convex corrugations and positioned between the steam distribution box and the condensation water collecting box; and the steam pipe is connected with the steam distribution box to deliver steam to the plate bundle. The plate type air cooling system has the advantages of high heat exchange efficiency, simple and reasonable structure and easy and convenient manufacture and later maintenance.

Motor control method based on DCS system

The invention relates to a motor control method and discloses a motor control method based on a DCS system. A computer sets motor operation and control parameters via network service so as to operate and control the motor. The DCS system comprises a control motor and an upper computer connected with the control motor, wherein the control motor is connected with a plurality of motors of various types, and a standard motor module is arranged in the control motor. The control method is as follows: firstly setting the equipment parameter, the operation parameter, the starting up and stopping parameter and the fault alarm parameter of each motor; calling the motor subprogram; then calling the standard motor module to perform signal processing and control on different types of motors; after finishing subprogram processing, returning to the body program which controls the motor; and meanwhile, outputting a corresponding control order, the current operation state of each motor and the fault information ...

Online repairing equipment and method for sealing surface of valve seat of safety valve

The invention belongs to the technical field of nuclear power, and particularly relates to online repairing equipment and method for a sealing surface of a safety valve seat. The online cutting device can be integrally mounted in the safety valve through the first connecting plate, and mounting and dismounting are convenient; the space position of the cutter in the safety valve can be adjusted through the Z-axis transmission mechanism, the Y-axis transmission mechanism and the X-axis transmission mechanism, and the positions of the cutter and the sealing surface can be finely adjusted through the cutter transmission mechanism, so that the safety valve turning device can adapt to safety valves of various models and sizes, can turn any position of the sealing surface, and is wide in application and high in practicability. The purchase and replacement cost of spare parts of the whole valve is effectively reduced; through the first control device and the first camera, turning of the alloy layer ...

Calibration method of quasi-optical cavity dielectric constant measurement system and dielectric constant measurement method

The invention belongs to the technical field of electromagnetism, and particularly discloses a calibration method of a quasi-optical cavity dielectric constant measurement system and a dielectric constant measurement method. The calibration method comprises the following steps: compiling frequency response isolation calibration software, wherein the frequency response isolation calibration software comprises transmission frequency response standard software compiled according to a transmission frequency response standard and isolation standard software compiled according to an isolation standard; when the transmission frequency response standard and the isolation standard are sequentially connected into the quasi-optical cavity dielectric constant measurement system, transmission frequency response standard software and isolation standard software are adopted respectively, and transmission frequency response calibration and isolation calibration are carried out on the quasi-optical cavity ...

Composition with hair growing and strengthening functions, preparation method and application

The invention discloses a composition with hair growing and strengthening functions, a preparation method and application, and belongs to the technical field of hair growing and strengthening. The composition comprises the following raw materials in parts by weight: main components: 1020-3050 parts of protein and 22.4-140 parts of a nutrition enhancer; the functional components comprise 20 to 200 parts of powdery phytosterol ester, 100 to 500 parts of millet extract, 100 to 500 parts of rhizoma polygonati powder, 100 to 400 parts of mulberry powder and 100 to 500 parts of aronia melanocarpa fruit powder; and the auxiliary component comprises 200-1800 parts of a flavoring agent. The composition is free of toxic and side effects, can promote metabolism and proliferation of hair follicle cells, can effectively promote formation of hair follicle melanin, shortens the time that hair follicles enter a growth period from a rest period and grow hair, and can enhance the tightness of hair in scalp ...

Method for controlling flow of transmission control system of paper machine

The invention discloses a method for controlling the flow of a transmission control system of a paper machine. In the method, a control system comprising a programmable control device PLC, a speed governing device and a field bus is used; the control operating flow of preparation, operation, creeping, shut-down, cleaning and fault treating functions, which is included in the transmission control system of the paper machine is modularized; according to the functions required to control by the transmission system of the paper machine, 10 to 50 subsection states are set, and the address indexed addressing mode is used for subsection state logic control of all subsections such as logic conversion, data treatment and speed/torque control switch; the PLC repeatedly controls the transmission system according to the steps of input sampling, program operation, output refreshing and under the support of a flow control module; and the speed governing device executes all functions according to the ...

Pace-making signal detecting method and system and electrocardio detecting device

The invention discloses a pace-making signal detecting method and system and an electrocardio detecting device. The method comprises preprocessing original pace-making signals separated from pace-making electrocardio signals, and then based on the preprocessed signals, computing the basic morphological parameters of the pace-making signals, wherein the basic morphological parameters include the width, the slew rate and the amplitude of the pace-making signals; based on the calculated basic morphological parameters of the pace-making signals, determining whether the pace-making signals are true or false, and recording the position information of the pace-making signals which are determined to be true. The pace-making signal detecting device can detect the pace-making signals more accurately and mark the pace-making signals on electrocardio signals for output.

Protection positioner of paper roll moves back on rewinding machine

The utility model relates to a protection positioner of paper roll moves back on rewinding machine, moving back the paper roll, to pass through the support fixed, its distolateral clutch that be, the clutch is driven by the clutch hydraulic stem of horizontal setting, moving back the tip of paper roll and installing the arm lock, the arm lock is driven by the arm lock hydraulic stem of vertical setting, the locating lever of protection positioner below being located the arm lock hydraulic stem, but the locating lever articulates on the fixed block through the pivot and the relatively fixed piece carries out vertical luffing motion, the upper end of locating lever is located the below of the arm lock link of arm lock hydraulic stem, and the constant head tank on the frame board is arranged in to its lower extreme. The utility model discloses a cooperation structure of locating lever and constant head tank, through observe the locating lever whether fall into deciliter position that constant ...

Crystallizer casting powder for peritectic steel slab continuous casting and formula thereof

The invention relates to crystallizer casting powder for peritectic steel slab continuous casting. The physical property parameters of the crystallizer casting powder for the peritectic steel slab continuous casting are that the melting point is 1100-1160 DEG C, the water content is 0.16%, and the viscosity is 0.1 Pa. S. The components of the formula of the crystallizer casting powder comprise, by weight ratio, 25.45-31.45 of SiO2, 2.41-5.41 of Al2O3, 37.73-43.73 of CaO, 0.5-1.5 of MgO, 9.97-10.97 of Na2O, 2.71-4.31 of T.C, 11.17-11.97 of F- and 1.37-1.49 of R. According to the crystallizer casting powder for peritectic steel slab continuous casting and the formula thereof, the viscosity and the melting point of the casting powder are reduced, the lubrication effect of the casting powder is improved, and the melting rate of the casting powder is improved; meanwhile, the alkalinity of the casting powder is improved, the crystal phase ratio in the melt cinder of the casting powder is improved ...

HHT-based high-frequency combined coding steady state visual evoked potential brain-computer interface method

The invention discloses a Hilbert-Huang Transform (HHT)-based high-frequency combined coding steady state visual evoked potential brain-computer interface method, which comprises the following steps of: connecting hardware, expressing different targets by using nn stimulation sequences formed by time sequence permutation and combination through n high-frequency stimulation frequencies, coding the stimulation sequences to form a code base, then executing electroencephalogram data characteristics by adopting a Hilbert-Huang Transform (HHT)-based variable frequency electroencephalogram signal characteristic extraction method, acquiring a Hilbert time-frequency graph of the electroencephalogram data, and comparing the extracted electroencephalogram data characteristics with the code base by using a local frequency spectrum extreme value target identification method to realize quantified target identification accuracy. The method has the advantages of simple operation, little electrode number ...

Dual real-time fluorescent RT-PC detection kit for subtypes of flu viruses N1 and N2

The invention relates to belongs to the field of flu virus detection, in particular to a dual real-time fluorescent RT-PC detection kit for the subtypes of flu viruses N1 and N2. The kit comprises a specific amplification flu virus N1 gene sequence primer with base sequences shown as SEQ ID NO I and SEQ ID NO:2, a Taqman probe which is used for detecting a flu virus N1 gene and has a base sequence shown as SEQ UD NO:3, a specific amplification flu virus N2 gene sequence primer with base sequences shown as SEQ ID NO:4 and SEQ IDNO:5 and a Taqman probe which is used for detecting the flu virus N2 gene and has a base sequence shown as SEQ IDNO:6; and all the Taqman probe sequences can be replaced by base complementation sequences thereof. The kit is used for detecting the subtypes of the flu viruses N1 and N2 and has the advantages of rapidness, simpleness, low cost, stable result, and the like.

Municipal sludge water conveying pipe convenient for treating sediment

The utility model discloses a municipal sludge water conveying pipe convenient for treating sediment. Wherein the spliced sewage pipe is perpendicular to the axis direction, the section of the splicedsewage pipe is in an arc shape, and the radian of the spliced sewage pipe is larger than 180 degrees; the sewage pipe containing channel is used for containing the spliced sewage pipe; the spliced sewage pipe is formed by connecting and splicing a plurality of sewage conveying short pipes end to end, the C-shaped opening portion of each sewage conveying short pipe is arranged upwards, and the spliced sewage pipe can move in the sewage pipe containing channel in the axial direction. The utility model provides a municipal sludge water conveying pipe convenient for treating sediment. The splicedsewage pipe formed by splicing a plurality of sewage conveying short pipes is arranged, sludge water can be conveyed by adopting a closed structure, and the sewage conveying short pipes can be conveniently ...

Multi-frequency time sequence combined steady-stage visual evoked potential brain-computer interface method

The invention discloses a multi-frequency time sequence combined steady-stage visual evoked potential brain-computer interface method. The method comprises the following steps of: putting a measurement electrode on the head of a subject and connecting the measurement electrode with an electroencephalogram amplifier, a computer and a computer screen; and forming n different representation targets by using n stimulus frequencies, wherein n is an integer more than 1; and realizing the representation of the visual targets and the visual feedback of the subject by using the computer screen. The method improves the information transmission rate of the brain-computer interface by constructing a plurality of representation targets from a few stimulus frequencies, has the advantages of multiple representation targets and high specificity of the detection result, can realize communication between the disabled having normal mind but suffering from paralysis of the neuromuscular system and an external ...

Dual real-time fluorescent RT-PC detection kit for subtypes of flu viruses N1 and N2

The invention relates to belongs to the field of flu virus detection, in particular to a dual real-time fluorescent RT-PC detection kit for the subtypes of flu viruses N1 and N2. The kit comprises a specific amplification flu virus N1 gene sequence primer with base sequences shown as SEQ ID NO I and SEQ ID NO:2, a Taqman probe which is used for detecting a flu virus N1 gene and has a base sequence shown as SEQ UD NO:3, a specific amplification flu virus N2 gene sequence primer with base sequences shown as SEQ ID NO:4 and SEQ IDNO:5 and a Taqman probe which is used for detecting the flu virus N2 gene and has a base sequence shown as SEQ IDNO:6; and all the Taqman probe sequences can be replaced by base complementation sequences thereof. The kit is used for detecting the subtypes of the fluviruses N1 and N2 and has the advantages of rapidness, simpleness, low cost, stable result, and the like.

Motor control method based on DCS system

The invention relates to a motor control method and discloses a motor control method based on a DCS system. A computer sets motor operation and control parameters via network service so as to operateand control the motor. The DCS system comprises a control motor and an upper computer connected with the control motor, wherein the control motor is connected with a plurality of motors of various types, and a standard motor module is arranged in the control motor. The control method is as follows: firstly setting the equipment parameter, the operation parameter, the starting up and stopping parameter and the fault alarm parameter of each motor; calling the motor subprogram; then calling the standard motor module to perform signal processing and control on different types of motors; after finishing subprogram processing, returning to the body program which controls the motor; and meanwhile, outputting a corresponding control order, the current operation state of each motor and the fault information ...

HHT-based high-frequency combined coding steady state visual evoked potential brain-computer interface method

The invention discloses a Hilbert-Huang Transform (HHT)-based high-frequency combined coding steady state visual evoked potential brain-computer interface method, which comprises the following steps of: connecting hardware, expressing different targets by using nn stimulation sequences formed by time sequence permutation and combination through n high-frequency stimulation frequencies, coding thestimulation sequences to form a code base, then executing electroencephalogram data characteristics by adopting a Hilbert-Huang Transform (HHT)-based variable frequency electroencephalogram signal characteristic extraction method, acquiring a Hilbert time-frequency graph of the electroencephalogram data, and comparing the extracted electroencephalogram data characteristics with the code base by using a local frequency spectrum extreme value target identification method to realize quantified target identification accuracy. The method has the advantages of simple operation, little electrode number ...

Process for dip-coating fiber surface with emulsion polymerization chloroquine diphosphate microcapsules

The invention belongs to the technical field of spinning, and particularly relates to a process for dip-coating fiber surface with emulsion polymerization chloroquine diphosphate microcapsules. The process comprises the steps that a fiber main material and hydroxypropyl methyl cellulose are added into a solvent, a stock solution is prepared by heating and dissolving, and then the stock solution isadded into a spinning box; the stock solution in the spinning box is ejected by a spinning jet, and is solidified in a DMAC aqueous solution to obtain a composite fiber; and the surface of the composite fiber is coated with the microcapsules with an antiviral agent containing chloroquine diphosphate as capsule cores and the fiber main material as capsule walls to obtain a finished fiber. According to the process, the antiviral agent containing chloroquine diphosphate is taken as the capsule cores of the microcapsules, then the surface of the composite fiber is coated with the microcapsules toobtain ...

Primer, probe, kit and method for detecting A, B and H5 subtype influenza virus by triple fluorescent quantitative RT-PCR

The invention discloses a primer, a probe and a detection kit containing the primer and the probe, which are used for detecting A type, B type and H5 subtype influenza viruses through triple fluorescence quantitative RT-PCR. The invention also discloses a method for executing fluorescence quantitative RT-PCR for A type, B type and H5 subtype influenza viruses by using the primer and the probe. The detection kit includes RT-PCR reaction buffer, Taq enzyme, inverse transcriptase, DEPC liquid, positive control and negative control. The process involves the steps of establishing a RT-PCR reaction system by using the primer and the probe, extracting DNA or RNA from a specimen to be detected, adding the extracted DNA or RNA into the aforesaid reaction system, setting reaction conditions, carrying out RT-PCR augmentation and fluorescence signal detection. The invention can identify A type, B type and H5 subtype influenza viruses in the detected specimen within 3-4 hours in a fast, exact, specific ...

Acousto-optic-based sleep-aiding auxiliary equipment and installation method thereof

The invention discloses sound and light-based sleep-aiding auxiliary equipment and an installation method thereof, the sleep-aiding auxiliary equipment comprises an equipment base, the periphery of the equipment base is provided with a barrel cover, and the periphery of the bottom surface of the equipment base is provided with a retention structure for fixing the position of the equipment; the equipment base comprises a base plate, inserting grooves are formed in the periphery of the base plate, positioning holes are formed in one sides of a group of inserting grooves located in the diagonal positions of the base plate, connecting pieces are arranged on the periphery of the barrel cover, and the connecting pieces of the barrel cover are connected with the positioning holes of the equipment base so that the barrel cover can be connected to the position above the equipment base. The device can be quickly connected, compared with an integrated structure which adopts a screw and other structures ...

Virus establishment method for reducing mutation rate of cotton bollworm singly-embedded capsid nuclear polyhedrosis virus G4 strain

The invention relates to a virus establishment method for reducing the mutation rate of a cotton bollworm singly-embedded capsid nuclear polyhedrosis virus G4 strain. The virus establishment method comprises the following steps: adopting the virion of the wild HaSNPV (helicoverpa armigera single nucleocapsid nucleopolyhedrovirus) G4 strain with an fp25k gene not mutated as an experimental material; carrying out site-directed silent mutation twice by establishing a plasmid which contains the fp25k gene; and then carrying out cotransfection, fluorescent screening and plaque purification by establishing a plasmid which contains fluorescent protein to obtain a mutated G4 virus. According to the mutated G4 virus obtained through the method disclosed by the invention, a genetic factor which generates high mutation rate during the passage of a wild virus is eliminated and the stability is strong.

Method for controlling flow of transmission control system of paper machine

The invention discloses a method for controlling the flow of a transmission control system of a paper machine. In the method, a control system comprising a programmable control device PLC, a speed governing device and a field bus is used; the control operating flow of preparation, operation, creeping, shut-down, cleaning and fault treating functions, which is included in the transmission control system of the paper machine is modularized; according to the functions required to control by the transmission system of the paper machine, 10 to 50 subsection states are set, and the address indexed addressing mode is used for subsection state logic control of all subsections such as logic conversion, data treatment and speed/torque control switch; the PLC repeatedly controls the transmission system according to the steps of input sampling, program operation, output refreshing and under the support of a flow control module; and the speed governing device executes all functions according to thePLC ...