汽车制动液贮液罐

Mulberry picking method and device capable of intelligently identifying maturity based on machine vision

The invention relates to the field of automatic mulberry picking, and particularly discloses a mulberry picking method and device capable of intelligently recognizing maturity based on machine vision. Mulberries in an orchard are grouped before picking, mulberry images corresponding to each group of mulberries are collected, color features and area features of the mulberries are extracted in combination with an image processing technology, and maturity detection is performed on the pre-grouped mulberries by using a pre-trained multi-layer perceptron maturity detection model. According to the method, the picking task of the mulberries is selected, vibration picking parameters are set for the multiple vibration picking devices participating in the picking task based on different maturity, then the whole picking task is distributed and planned, finally the mulberry picking efficiency and quality are improved, and damage to the mulberries in the picking process is reduced.

Video conference processing method and device, electronic equipment and storage medium

The embodiment of the invention provides a video conference processing method and device, and the method comprises the steps: responding to a conference creation operation of a first user of first terminal equipment, and generating a virtual object and conference invitation information of a target video conference; and pushing the conference invitation information to a second terminal device by using the virtual object, so that the second terminal device adds a second user to the target video conference in response to conference joining response operation of the second user for the conference invitation information. According to the embodiment of the invention, the conference invitation information is prevented from being directly sent through a mail or other instant messaging software, the risk that the conference invitation information is leaked in the sending process is reduced, and the security of the video conference is improved. The encrypted conference joining request generated by ...

Overhead ground wire grounding detection system

The invention provides an overhead ground wire grounding detection system. The system comprises a power supply module, a DC boost module, an inverter module, a first filtering module, a second filtering module, a coupling loading unit, a control transmission module and an acquisition unit. The output end of the power supply module is connected to the input end of the direct current boosting module, the output end of the direct current boosting module is connected to the input end of the inversion module through the first filtering module, and the output end of the inversion module is connected to the input end of the second filtering module. The output end of the second filtering module is connected to the input end of the coupling loading unit, and the coupling loading module loads test voltage to the overhead ground wire through electromagnetic induction; the acquisition unit is used for acquiring voltage and current of the overhead ground wire and outputting the voltage and current to ...

USER PORTAIT METHOD AND APPARATUS, READABLE STORAGE MEDIUM, AND TERMINAL DEVICE

The present application relates to the technical field of computers, and specifically relates to a user portrait method and apparatus, a computer readable storage medium, and a terminal device. The method comprises: acquiring feature information of a user in each evaluation dimension and, on the basis of the feature information, constructing an eigenvector of the user; selecting N training samples from a preset historical user information database, and forming a training sample set; traversing the various sorting orders of the classifiers in a preset classifier set and, on the basis of the eigenvector of the user and the training sample set, respectively calculating the average distances of the samples of the various sorting orders; selecting the sorting order having the shortest average distance of the samples from the various sorting orders as a preferred path and, on the basis of a label value of the user obtained by being processed by each classifier in the preferred path, constructing ...

STACKED CITY ROAD

A stacked city road comprising a straight section, a longitudinal slope section, and a junction section. The straight section and the junction section are connected to form a road network. The longitudinal slope section and the straight section are connected to connect the straight section to the ground. The straight section comprises a bottom-layer roadway (101), a parking layer (102), and a driving layer (103). Provided between the bottom-layer roadway (101) and the parking layer (102) and between the parking layer (102) and the driving layer (103) are bidirectional and parallel ramps (104) for vehicles to drive upwards or downwards. This facilitates vehicles in the straight section to change from the bottom-layer roadway (101) to the parking layer (102) to park thereat, or to change from the parking layer (102) to the driving layer (103) to drive thereon. The stacked city road is divided into three layers, utilizes three-dimensional space for diversion of vehicles, allows for intensive ...

Transmission pressurization system based on hollow motor

The invention relates to a transmission pressurization system based on a hollow motor, and belongs to the field of automobile braking. Comprising a bearing, a hollow motor, a hollow motor rotor, a lead screw, a nut, a steel ball, a push rod seat, a valve body, a push rod, a piston, an auxiliary leather cup, a main leather cup, a main cylinder body, a sliding block, a bolt and a limiting seat. The hollow motor linear thrust generator has the advantages that the structure is novel, the motor is used as a power source, the hollow motor linear thrust generator can be applied to conventional braking, brake-by-wire, active collision avoidance, self-adaptive cruise, intelligent driving and braking energy recovery systems, the ball screw is used, rotary motion of the hollow motor is changed into linear motion, thrust is generated, and the hollow motor linear thrust generator has the advantages of being high in response speed, high in robustness and the like; the piston is connected with the screw ...

Spray head for biogas slurry irrigation and irrigation assembly

The invention relates to the field of agricultural appliances, in particular to a spray head for biogas slurry irrigation and an irrigation assembly.The spray head for biogas slurry irrigation comprises a spray head body and a pipe connecting device, the pipe connecting device is arranged at one end of the spray head body and used for being connected with an irrigation pipeline, and a first water channel and a second water channel are arranged in the spray head body; the pressurized biogas slurry is sprayed into the air through the first water channel, the second water channel is communicated with the first water channel, and the second water channel is used for conveying clear water into the first flow channel. According to the spray head for biogas slurry irrigation, the second water channel is arranged to communicate with the first water channel, the second water channel is used for conveying clear water into the first water channel, the concentration of biogas slurry can be diluted ...

Low-altitude control and anti-unmanned aerial vehicle integrated command vehicle system and control method

The invention provides a low-altitude control and anti-unmanned aerial vehicle integrated command vehicle system and a control method, and belongs to the field of vehicle-mounted unmanned aerial vehicle prevention and control, and the method comprises the steps: making a prevention and control plan, and setting a protection region, a denial region and an early warning region; drawing a flight airspace of the vehicle-mounted unmanned aerial vehicle, planning a flight route, making a flight plan, receiving a flight plan reply, controlling the vehicle-mounted unmanned aerial vehicle to take off and execute a task, and adding the task into a white list; identifying the unmanned aerial vehicle after detecting that the unmanned aerial vehicle enters the early warning area, generating target early warning information and adding the target early warning information into a blacklist; when the unmanned aerial vehicle in the blacklist enters the denial area, judging whether the type of the unmanned ...

Establishment method and identification method of small intestine CT image identification segmentation network model

The invention provides a construction method and a recognition method of a small intestine CT image recognition segmentation network model, and the construction method comprises the following steps: obtaining a plurality of small intestine CT images with lesions, constructing an image data set, and dividing the data set into a training set and a test set according to a proportion; performing enhancement processing on the image data set in the previous step through dynamic stochastic resonance enhancement; building a U-Net network model, and training the network model by using the enhanced training set obtained in the previous step; and testing the network model by using the enhanced test set obtained in the above steps, and completing the building of the model. The invention provides a method for enhancing a CT image based on dynamic stochastic resonance. Useful signals in an original image can be effectively enhanced. The medical image processing is mainly used for assisting doctors in ...

LITHIUM COBALT METAL OXIDE POWDER AND PREPARATION METHOD THEREFOR, AND METHOD FOR MEASURING CONTENT OF TRICOBALT TETROXIDE

Disclosed is lithium cobalt metal oxide powder. The lithium cobalt metal oxide powder is in a coating structure; the lithium cobalt metal oxide powder comprises a lithium cobalt metal oxide matrix; the lithium cobalt metal oxide powder further comprises a Co3O4 coating layer; the general formula of the lithium cobalt metaloxide powder is LiaCo1-x-yMxNyO2·rCo3O4, wherein 0.002 < r ≤ 0.05, 1 ≤ a ≤ 1.1, 0 < x ≤ 0.02, 0 ≤ y ≤0.005, a < 1+3r, M is a doping element, and N is a coating element. The present invention further provides a preparation method for the lithium cobalt metal oxide powder and a method for measuring the content of Co3O4 in the lithium cobalt metal oxide powder. The material prepared in the present invention has excellent electrochemical performance.

Overhead ground wire grounding state monitoring and early warning system

The invention provides an overhead ground wire grounding state monitoring and early warning system. The system comprises a power supply unit, a DC-AC conversion unit, a control transmission unit, a coupling loading unit, a remote monitoring unit and a grounding parameter acquisition unit. The power supply unit provides a DC power supply for the DC-AC conversion unit, the control transmission unit, the coupling loading unit and the grounding parameter acquisition unit. The input end of the DC-AC conversion unit is connected to the output end of the power supply unit, the output end of the DC-AC conversion unit is connected to the coupling loading unit, and the DC-AC conversion unit is used for converting direct current provided by the power supply unit into alternating current with set frequency and set voltage; the input end of the coupling loading unit is connected to the output end of the DC-AC conversion unit, and the coupling loading unit is used for loading the alternating current ...

Multi-stage control-based crisp plum pesticide spraying method and system

The invention provides a crisp plum pesticide spraying method and system based on multistage control, and the method comprises the steps: collecting a plurality of crisp plum pesticide spraying historical images, and carrying out the clustering tagging of maturity, thereby obtaining a crisp plum tagging historical image set; key frame decision preprocessing is executed, image normalization and data noise reduction operation are completed, and a Crili training historical image set is obtained; inputting into a brittle plum clustering fragmentation network to implement loop training to obtain a brittle plum disease and insect pest clustering fragmentation model; clustering fragmentation is carried out on the images of the to-be-sprayed crisp plums, pest and disease detection results of the fragmented images of the to-be-sprayed crisp plums are obtained and integrated, and pest and disease risk of the to-be-sprayed crisp plums is obtained; in combination with the spraying duration of the to-be-sprayed ...

O2O building material supply chain management system and method

The invention relates to the technical field of building material supply chain management, in particular to an O2O building material supply chain management system and method, and the system comprises an information centralized control center, an information storage and calling module, an offline management module, an online management module and a user maintenance module. The information storing and calling module is connected with the information centralized control center and is used for storing data of other modules; the system is high in intelligent degree, the offline management module manages the offline raw material purchase, product production and sales steps of the supply chain, the standardized production of the building material supply chain is effectively ensured, the production transparency is improved, the online management module can provide sufficient product production information for the purchased customers, and the production efficiency is improved. And related commodity ...

FACIAL EXPRESSION RECOGNITION FEATURE EXTRACTION METHOD EMPLOYING EDGE DETECTION AND SIFT

The present invention provides a facial expression recognition feature extraction method employing edge detection and SIFT. The method comprises: acquiring an image containing a face; dividing the image into a background class and an object class, and performing edge detection to obtain a sub-image about face information, i.e., an object class sub-image; and extracting a feature point in the object class sub-image, and generating a SIFT descriptor for expression information in the object class sub-image. In the invention, the effects of a background on important information are eliminated during a feature extraction process, a SIFT descriptor is obtained by performing feature point extraction on an image, and the extraction process is extremely stable with regards to noise, illumination, partial occlusion, and affine transformation. A SIFT descriptor in an image is extracted to complete image matching and PCA is used for dimensionality reduction, thereby speeding up feature extraction and ...

Automatic change removal milling cutter type fluting ware

... 本实用新型公开了一种自动化移动铣刀式开槽器，属于建筑装修工具技术领域，包括开槽器和可驱动开槽器自动工作的智能驱动系统，所述开槽器包括壳体和设置于壳体内腔的开槽机构，所述开槽机构包括在壳体纵向方向前后错开的开沟轮和立铣刀，所述开沟轮与立铣刀平行设置，所述开沟轮包括在壳体前后方向左右设置的左开沟轮和右开沟轮。本实用新型通过开沟轮和立铣刀的组合运用，一次性完成开槽，简化了开槽程序，提高开槽效率，同时，通过智能驱动系统实现了自动化机械化作业，极大降低工人的劳动强度，解放了劳动力。 ...

Oily sewage treatment equipment for oil field

The invention discloses oil field oily sewage treatment equipment which comprises an oil removal tank, the output end of a dosing pump is communicated with a flocculant dosing pipe fixed on the inner wall of the oil removal tank, baffles distributed alternately are fixed in the oil removal tank, and a coarse filter screen is fixed below the baffles in the oil removal tank. The output end of the variable-frequency sewage pump on one side of the oil removal tank is led into a cavity below the coarse filter screen, an oil-water separation membrane is mounted in the oil removal tank, a sensor mounting seat is fixed above the oil-water separation membrane, and a pressure sensor in contact with the oil-water separation membrane is fixed on the sensor mounting seat; a fine filter screen is fixed below the oil-water separation membrane on the oil removal tank, a drain pipe is communicated with the oil removal tank close to the fine filter screen, an electric control valve is mounted at the drain ...

Seedling taking mechanical device, automatic transplanter and seedling taking and throwing method thereof

The invention discloses a seedling taking mechanical device, an automatic transplanter and a seedling taking and dropping method thereof.The seedling taking mechanical device comprises a seedling taking clamping jaw, the seedling taking clamping jaw comprises a fixing plate I, a pair of clamping jaws rotationally installed on the fixing plate I and a connecting rod mechanism driving the clamping jaws to be opened and closed, and the connecting rod mechanism comprises a fixing sliding seat and a sliding rod which are arranged on the fixing plate I; a sliding hole is formed in the fixed sliding seat, the sliding rod is installed in the sliding hole in a sliding mode, the first end of the sliding rod is connected with the clamping jaw through the pull rod, and the second end of the sliding rod is connected with the first connecting rod in a rotating mode. The device is simple in structure and high in operation efficiency, the positions of the seedling taking claws can be automatically adjusted ...

Engine torque analytical calculation model for real-time control

The invention relates to an engine torque analytical calculation model for real-time control, and belongs to the technical field of engines. The model comprises an engine air inlet system analytic calculation model, a thermodynamic process analytic calculation model of each cylinder, an engine exhaust system analytic calculation model and an engine crankshaft dynamics analytic calculation model. According to the engine torque analytical calculation model, starting from an engine operation mechanism, compared with a traditional average value model, the engine torque analytical calculation model can represent fluctuation characteristics of engine output torque and is suitable for torsional vibration analysis and torsional vibration control of a vehicle transmission system carrying an engine. The model is clear in structure and simple in calculation, can be used for solving the output torque of the engine and the state of each part on line without the support of a specific solver, and can ...

BORATE COMPOUND, AND SYNTHESIS METHOD THEREFOR AND USES THEREOF

A borate compound serving as a proteasome inhibitor, a preparation method for the borate compound and uses thereof.

Bridge expansion joint device

The invention discloses a bridge expansion joint device, belongs to the technical field of bridge construction, and solves the problems that a toothed plate is easy to incline, a vehicle jolts severely and a bridge expansion joint is easy to damage. Comprising two beam bodies and telescopic plates located on the two beam bodies correspondingly, an expansion joint is formed between the two beam bodies, and the ends, located in the expansion joint, of the two beam bodies are each provided with a supporting plate, a lifting base, a transmission device and a mounting groove; the supporting plate can slide in the height direction of the beam body. The top of the mounting groove is located between the top and the bottom of the supporting plate, and the lifting seat is arranged in the mounting groove and is in sliding connection with the mounting groove; the transmission device enables the lifting base and the beam bodies to be in transmission connection, when the two beam bodies are far away ...

WIRELESS HEADSET

Disclosed is a wireless headset, comprising an in-ear portion, wherein the in-ear portion is in contact with a human ear when the wireless headset is worn; the in-ear portion comprises a wearing face that is opposite the ear canal of the human ear when the wireless headset is worn; and the in-ear portion is provided with a wearing detection sensor, sound outlet holes and a contact group, and the wearing detection sensor, the sound outlet holes and the contact group are all arranged on the wearing face. The wearing detection sensor, the sound outlet holes and the contact group are all arranged on the wearing face of the in-ear portion opposite the ear canal of the human ear, so that the wearing detection sensor can be in direct contact with the human skin, thereby improving the detection accuracy of the wearing detection sensor. In addition, the sound outlet holes are located on the wearing face of the in-ear portion and can give sound to the human ear to improve the sound quality. Moreover ...

SELF SERVICE INFORMATION DISPLAY DEVICE

A self service information display device (100) is provided, which comprises a host machine (1), a display screen (2) equipped on the host machine (1), and a control circuit (3) equipped in the host machine (1). The control circuit (3) comprises a processing module (31), a memory module (32) and a display module (33).The memory module (32) and the display module (33) are connected with the module (31). The display module (33) is connected with the display screen (2). The information display device (100) further comprises a gathering system and a data interface (5) for connecting with the outside devices. The data interface (5) is connected with the processing module (31).

Low-temperature breeding device for large yellow croakers

The invention discloses a low-temperature breeding device for large yellow croakers. The low-temperature breeding device comprises a breeding pond, wherein a pollution discharge assembly is arranged at the bottom end of the breeding pond; a water return assembly is arranged on the side wall of the breeding pool; a temperature sensor and an oxygen sensor are arranged in the breeding pond; the walking channel is detachably connected to the top end of the breeding pond, a driving assembly is arranged on the walking channel, and the output end of the driving assembly extends into the breeding pond and is in threaded connection with the intercepting net; the driving assembly is rotationally connected with an oxygen supply assembly; and the water circulation mechanism comprises a filtering assembly communicated with the pollution discharge assembly, an outlet of the filtering assembly is communicated with the temperature adjusting device, and an outlet of the temperature adjusting device is communicated ...

Electric field cathode ray reinforcing device

The utility model discloses an electric field cathode ray reinforcing device which comprises a fixing frame, the fixing frame is used for fixing a cathode ray, the fixing frame comprises flat steel and hooks, the flat steel and a cathode frame are located on the same horizontal line, the flat steel is arranged in pairs to clamp the cathode ray, the flat steel is provided with a plurality of bolt holes, and the two ends of the flat steel are fixedly installed on the cathode frame through the hooks. And the bolt holes tightly attach the flat steel to the two sides of the cathode line through bolt locking. According to the cathode wire clamping device, the flat steels are arranged in pairs to clamp the cathode wire, the bolt holes formed in the flat steels tightly attach the flat steels to the two sides of the cathode wire through bolt locking, and the two ends of the flat steels are fixedly mounted on the cathode frame through the hooks, so that the cathode wire is clamped, and the cathode ...

Information acquisition system for building material brand management

The invention relates to an information acquisition system, in particular to an information acquisition system for building material brand management, which belongs to the technical field of brand management and comprises an information acquisition module, an information transmission module, an information early warning processing module, a comprehensive analysis module, an information correction module, an information comprehensive management system and an information dynamic supervision module. The information acquisition module is used for acquiring brand information of building materials, the information transmission module is connected with the information acquisition module and is used for transmitting the building material brand information acquired by the information acquisition module, the information early warning processing module is used for receiving the building material brand information and auditing a brand party, and the comprehensive analysis module is connected with the ...

Fixed-torque one-way rotating structure of electric control booster

The invention relates to a fixed-torque one-way rotating structure of an electric control booster, and belongs to electric control brake boosters in the field of automobile brake. The stator is provided with a right trapezoid groove, the rotor is provided with a right trapezoid boss, the stator is matched with the groove and boss structure of the rotor, the stator is installed on the positioning base through a buckle structure, and the spring is installed on the outer side of the rotor and fixed to the positioning base through the clamping ring. The motor has the advantages that the structure is novel, the rotor is connected with the transmission push rod, when the transmission push rod rotates clockwise, the rotor cannot rotate due to the limitation of the stator, when the transmission push rod rotates anticlockwise and the torque of the transmission push rod is smaller than the rated torque, the rotor cannot rotate due to the limitation of the stator, and when the torque of the transmission ...

Forest fire prevention emergency rescue aircraft flight situation monitoring method and system

The invention provides a forest fire prevention emergency rescue aircraft flight situation monitoring method and system. The method comprises the steps that the flight process of an emergency rescue aircraft is divided into five flight stages; performing discrete modeling on the flight process of the emergency rescue aircraft by using the automaton model; setting a flight speed curve of the emergency rescue aircraft in each flight direction stage; when the emergency rescue aircraft is located outside the blind area, the position of the emergency rescue aircraft is obtained by using a positioning technology, and the position of the emergency rescue aircraft in the blind area is predicted by combining a set flight speed curve of the emergency rescue aircraft; taking the position set sum of the whole flight stage of the emergency rescue aircraft as a planned flight trajectory of the emergency rescue aircraft; and the flight hybrid model of the emergency rescue aircraft is obtained, so that ...

Complex power distribution network fault positioning method based on multi-terminal traveling wave frequency matrix

The invention relates to a complex power distribution network fault positioning method based on a multi-terminal traveling wave frequency matrix, and the method comprises the steps: installing fault traveling wave collection equipment at each branch line of a power distribution network, and defining a reference terminal corresponding to each branch node of the power distribution network; before a real fault occurs, establishing a reference frequency matrix based on the topological structure of the power distribution network; after a real fault occurs, establishing a fault frequency matrix, and obtaining a fault judgment matrix by subtracting the established fault frequency matrix from the reference frequency matrix; judging a fault area according to the characteristics of the fault judgment matrix; the reference end of the fault point is determined according to the principle that the path from the fault point to the reference end does not pass through the branch nodes or the number of the ...

Icing wind tunnel 3D ice shape measuring method based on laser-induced fluorescence

The invention provides an icing wind tunnel 3D ice shape measurement method based on laser-induced fluorescence, and the method employs a laser-induced fluorescence imaging method according to the laser-induced fluorescence characteristics of water molecules, effectively solves the problem of imaging degradation of transparent ice body line structure light, can achieve the measurement of the cross section contour of the transparent ice body line structure light, and improves the measurement precision. And three-dimensional ice shape measurement is realized in combination with a scanning device, and a technical support is provided for realizing time-resolved 3D ice shape online measurement in an icing growth process in an icing wind tunnel.

Transmission device with swing angle for electric control booster

The invention relates to a transmission device with a swing angle for an electric control booster, and belongs to the field of automobile braking systems. The motor and the hydraulic main cylinder take the valve body as a carrier, the axis is coaxially fixed on the valve body, the piston is in radial sliding fit with the hydraulic main cylinder, one end of a transmission push rod of the transmission mechanism is in radial interference fit with a nut of the ball screw component, and a lead screw of the ball screw component is in radial interference connection with a motor rotor of the motor. A check block of the hydraulic main cylinder is limited in the piston through a spring check ring. The brake hydraulic master cylinder has the advantages that the structure is novel, the motor is used as a power source, thrust for generating hydraulic pressure is provided for the brake hydraulic master cylinder, and the push rod, the pressing block, the master cylinder push rod and the feedback disc ...

Main cylinder piston component of brake system

The invention relates to a brake system master cylinder piston component, and belongs to the technical field of vehicle brake systems. The magnet is installed at the bottom of a piston hole of the main cylinder piston, the push rod is installed in a hole of the lock sleeve, the surface of a ball head of the push rod is attached to the conical face of the hole bottom of the lock sleeve, the steel ball is placed in a steel ball containing hole of the lock sleeve, the lock sleeve is installed in an inner hole of the main cylinder piston, the end face of the lock sleeve abuts against the end face of the magnet, and the magnet abuts against the bottom of the hole of the main cylinder piston through the lock sleeve. The device has the advantages of being novel in structure, convenient to install, high in integration level, small in occupied space and high in reliability, separation of the magnet and brake fluid prevents the magnet from being corroded by the brake fluid and chipping, the coaxiality ...

Process and stirring equipment for polymer and cotton stalk composite material

The stirring equipment comprises a stirring barrel wall, a foot stool, a mounting bin and a sample collecting box, the upper surface of the stirring barrel wall is fixedly connected with a stirring barrel upper cover, the bottom end of the stirring barrel wall is provided with a discharging port, the foot stool is obliquely fixed to the outer side face of the bottom end of the stirring barrel wall, and the mounting bin is arranged on the bottom end of the stirring barrel wall. A mounting bin is fixed below the stirring barrel bottom cover, and the sample collecting box is placed on the outer side of the barrel wall of the stirring barrel. According to the process and the stirring equipment for the polymer and cotton stalk composite material, the problems that the mechanical property of the composite material is reduced and unstable due to the fact that cotton stalks are not easily and uniformly dispersed in a polymer, and stirring is insufficient in the stirring process of the polymer and ...

Application of dioscorea panthaica and/or dioscorea nipponica makino steroid total saponin extract in prevention and/or treatment of myocardial fibrosis

The invention provides an application of a dioscorea panthaica and/or dioscorea nipponica makino steroid total saponin extract in preparation of a medicine for preventing and/or treating myocardial fibrosis, and the content of steroid total saponin is not less than 35% by weight based on steroid total sapogenin. Experimental research shows that the dioscorea panthaica and/or dioscorea nipponica makino steroid total saponin extract has remarkable effects of preventing and/or treating myocardial fibrosis and improving clinical symptoms of patients, provides a new and safe medication choice with outstanding curative effect for clinical treatment of the patients with myocardial fibrosis, and has good economic benefits and social benefits.

Strong luminous gold-copper nanocluster and application thereof in preparation of luminous ink

The invention discloses a strongly luminous gold-copper nanocluster and application thereof in preparation of luminous ink, the molecular formula of the strongly luminous gold-copper nanocluster is shown as the following formula (1): Au2Cu6 (R1) 6 (R2) 2-formula (1), wherein R1 is one of C10H15S-and C4H9S-; and R2 is one of (C6H5) 2PCH2CH2P (C6H5) 2, (C6H5) 2PCH2CH2CH2P (C6H5) 2, (C6H5) 2PCH2CH2CH2CH2P (C6H5) 2, (C6H5) 2PCH2CH2CH2CH2CH2P (C6H5) 2, (C6H5) 2PCH2CH2CH2CH2CH2P (C6H5) 2, (C6H5) 2PCH2CH2CH2CH2CH2P (C6H5) 2, (C6H5) 2PCH2CH2CH2CH2CH2CH2P (C6H5) 2, (C6H5) 2PCH2CH2CH2CH2CH2CH2CH2P The gold-copper nanocluster has the characteristics of fluorescence and phosphorescence emission, high quantum yield, good stability, high yield and easiness in synthesis, the gold-copper nanocluster is combined with a high-molecular polymer to form luminous ink, and the luminous ink can be used for printing an anti-counterfeiting pattern layer and a two-dimensional code. The luminous ink based on the gold-copper ...

METHOD FOR ANALYZING ASSOCIATION BETWEEN RAIL TRANSIT AND TRANSFORMER DIRECT-CURRENT MAGNETIC BIAS

A method for analyzing association between rail transit and transformer direct-current magnetic bias, comprising the following steps: A, acquiring the magnitudes of feed cable currents and direct-current magnetic bias currents: measuring, by means of a monitoring device, the magnitudes of rail transit feed cable currents and power grid transformer direct-current magnetic bias currents within a certain period; B, on the basis of the feed cable currents acquired in step A, calculating characteristic quantities of the feed currents within the measurement period; C, according to the direct-current magnetic bias currents acquired in step A, calculating characteristic quantities of the direct-current magnetic bias currents within the measurement period; and D, according to the characteristic quantities of the feed currents and the direct-current magnetic bias currents calculated in step B and step C, calculating support levels and confidence levels, and generating an association rule. The association ...

Error detection device for machining equipment

The utility model belongs to the technical field of machining error detection, and particularly relates to an error detection device for machining equipment, which comprises a base and a top seat, load-bearing seats are slidably mounted on the two sides of the front surface and the rear surface of the top seat, and buffer layers are fixedly mounted on the sides, close to each other, of the outer surfaces of the four load-bearing seats. Stand columns are vertically welded to the middle of the lower surface of the loading seat and the two sides of the front surface and the rear surface of the base correspondingly, a supporting rod is vertically and fixedly installed in the middle of the lower surface of the stand column located at the top, and a same set of rod grooves are formed between the top and the middle of the front wall and the rear wall of the stand column located at the bottom; according to the error detection device, the support body is arranged as an assembly structure to adjust ...

3D metal printing wire cutting tool

The invention discloses a 3D metal printing wire cutting tool, and belongs to the technical field of metal part cutting. A 3D metal printing wire cutting tool comprises a mounting box with an opening formed in the top and a wire cutting machine and further comprises a main frame fixedly connected into the mounting box. The mounting frame is connected to the main frame in a sliding mode, and the wire cutting machine is arranged on the mounting frame; the second driving part is arranged in the mounting box and is used for driving the mounting frame to move; the fixing part is used for fixing a workpiece and is arranged on the mounting box; the parts are covered with the notches formed in the receiving box through the receiving box, then the second driving part drives the mounting frame to move so as to drive the wire cutting machine to move to cut the parts on the base plate, the cut parts are poured into the receiving box, and therefore the parts are prevented from falling off, and the situation ...

Metallized film capacitor self-healing point measuring device and method

The invention discloses a metallized film capacitor self-healing point measuring device and method, and the device comprises a C-shaped frame, a feeding roller and a coiling roller, the top end of one side of the C-shaped frame is fixedly provided with a top plate, and two flattening rollers are rotatably installed between the two opposite sides, close to the bottom, of the C-shaped frame. Two clamping grooves are symmetrically formed in the outer surfaces of the two opposite sides of the C-shaped frame in a penetrating mode, and the discharging roller and the winding roller are rotationally installed between the two opposite sides of the C-shaped frame through the clamping grooves. The capacitor metallized film is slowly wound through the winding roller, so that the capacitor metallized film slowly moves at the flattening roller, and the surface of the capacitor metallized film is photographed and detected through the two image sensors which are arranged on the adjacent sides of the two ...

High-precision docking transportation scheduling system for intelligent logistics

The invention provides a high-precision docking transportation scheduling system for intelligent logistics, and relates to the technical field of logistics scheduling, and the system comprises a scheduling platform and an early warning platform which are both based on a general control computer of a logistics park. The dispatching platform comprises a vehicle management module, an online map module, a comprehensive operation module and a detection control module, and the early warning platform comprises a manager early warning module and a driver reminding module. The vehicle management module is used for recording a unique code of a vehicle; according to the invention, the driving time of the vehicle is recorded, the duration of long-distance driving is forecasted and early warned, the potential safety hazard of a driver caused by fatigue driving is avoided, after the logistics vehicle continuously runs for a certain duration, automatic vehicle warehousing detection is carried out, and ...

Line report generation method and device

The invention discloses a line report generation method and device. The method comprises the following steps: acquiring point cloud data of a power transmission line, constructing a point cloud view of the power transmission line according to the point cloud data, and writing a tower identifier of each tower in the power transmission line into the point cloud view; generating tower list information corresponding to each tower in the power transmission line, and displaying the point cloud view and the tower list information; and receiving an information setting operation for the point cloud view and/or the tower list information, determining report information of a to-be-generated line report based on the information setting operation, and determining to generate the line report of the power transmission line based on the report information. The visual effect of the line report is improved, the display information of the line report is enriched, a user can accurately master the layout of ...

System for realizing cascading multifunctional radio frequency vector transceiving test

The invention relates to a system for realizing a cascading multifunctional radio frequency vector transceiving test. The system comprises a baseband unit for realizing digital signal processing and calculating a measurement result; the vector transceiving unit realizes half-duplex radio frequency double receiving and double transmitting; the spectrum analysis unit is used for testing the spectrum of the signal; the vector network test unit realizes a port standing wave test of the DUT; the controllable voltage unit provides a direct-current voltage source with programmable voltage; the current measuring unit measures the output current of the direct-current voltage source; and the multifunctional matrix switch is connected with the vector transceiving unit, the spectrum analysis unit and the vector network test unit, and is used for switching multiple ports and multiple functions, and realizing different test tasks through different switch combinations. By adopting the system for realizing ...

Flow field velocity measurement method and system based on convolutional neural network image segmentation

The invention discloses a flow field velocity measurement method and system based on convolutional neural network image segmentation, and the method comprises the steps: S1, obtaining a to-be-trained particle image sample set which comprises a preset number of artificially synthesized simulation particle images and corresponding mask images; s2, building a convolutional neural network model; s3, the particle image obtained through simulation synthesis is used for training, a trained model is obtained, and a synthesized data set comprises a training set and a verification set; s4, using the trained model to divide the particle image into a sparse region and a dense region; and S5, for the sparse region and the dense region, calculating speeds by using corresponding PIV and PTV respectively, and combining a PIV speed field and a PTV speed field to obtain a flow field measurement result. According to the flow field velocity measurement method provided by the invention, velocity measurement ...

Halogen-free low-smoke flame-retardant polyolefin sheath material and preparation process thereof

The invention relates to the technical field of flame-retardant polyolefin sheath materials, in particular to a halogen-free low-smoke flame-retardant polyolefin sheath material and a preparation process thereof. Comprising the following steps: step 1, preparing a halogen-free flame retardant; step 2, preparation of a flame-retardant synergist: montmorillonite is dispersed in N, N-dimethylformamide, and octadecyl isocyanate is used for modification, so that the flame-retardant synergist is obtained; step 3, putting an ethylene-vinyl acetate copolymer, maleic anhydride modified polyethylene, a halogen-free flame retardant, a flame-retardant synergist, a lubricant and carbazole violet pigment into a high-speed stirrer, stirring and mixing, and transferring into a pressurized internal mixer; and mixing by using a double-screw extruder, extruding by using a single-screw extruder, and granulating by using a granulator to obtain the polyolefin sheath material. The prepared polyolefin sheath material ...

Optimization system for automatic intelligent logistics scheduling path

The invention belongs to the technical field of intelligent logistics, and particularly relates to an automatic intelligent logistics scheduling path optimization system, which comprises a loading and unloading unit and a plurality of AGVs (Automatic Guided Vehicles) for logistics transportation, the loading and unloading unit comprises a control host and a mechanical arm, the control host is wirelessly connected with the AGV, and the mechanical arm is used for carrying the logistics box of the corresponding destination to the corresponding AGV; the AGV trolley comprises a main control chip, a vehicle-mounted navigation module, a plurality of laser sensors, a motor unit and an obstacle avoidance strategy module, the vehicle-mounted navigation module is used for acquiring a starting point and an ending point of the AGV trolley and formulating a navigation path according to the starting point and the ending point, and the laser sensors are arranged. Through interaction of the control host ...

Method for identifying unmanned aerial vehicle based on radar data

The invention provides a method for identifying an unmanned aerial vehicle based on radar data, which belongs to the field of unmanned aerial vehicle identification, and comprises the following steps: firstly, collecting echo and track data reported by radar detection equipment, distinguishing the characteristics of the echo data and the track data, respectively calculating the characteristic values of the track data of a flying bird and the unmanned aerial vehicle, and then calculating the characteristic values of the track data of the flying bird and the unmanned aerial vehicle; s3, constructing a training set and a test set by utilizing the characteristic value data obtained in the step S3, cutting abnormal samples and isolated samples in the training set and the test set by adopting DBSCAN clustering, then optimizing the similarity measurement of the KNN model, endowing different weights to different characteristic values, obtaining the optimized KNN model, and finally obtaining a KNN ...

Nano antibody as well as preparation method and application thereof

The invention discloses a nano antibody as well as a preparation method and application thereof. The method comprises the following steps: connecting a nucleic acid sequence of a CDR region with a nucleic acid sequence of a nano-antibody skeleton, inserting into an expression vector to obtain a recombinant expression vector, introducing the recombinant expression vector into a host cell, carrying out cell culture, collecting the cultured cell, and carrying out protein purification treatment to obtain the nano-antibody. The established rapid preparation method of the nano antibody can ensure the stability and specificity of the antibody, solves the problems of instability, aggregation, low titer and the like of a traditional antibody structure, does not need multiple rounds of panning, is simple in process and low in cost, can be used for preparing the nano antibody with stable structure and specificity on a large scale at one time, and has a wide application prospect. And a new thought ...

High-efficiency logistics sorting equipment

The invention provides efficient logistics sorting equipment and relates to the technical field of logistics sorting, the efficient logistics sorting equipment comprises a main conveying assembly, a sorting bin and guide frames, the sorting bin is arranged at the output end of the main conveying assembly, the guide frames are connected to the two sides of the sorting bin, and transfer conveyors are arranged at the output ends of the guide frames; an overturning assembly is arranged on the main conveying assembly, and the overturning assembly comprises a support and a lifting plate; a guide block moves along a guide groove, a lifting plate descends, an express parcel is clamped through relative movement of two clamping plates, the express parcel is driven to rotate face by face through equal-angle rotation of a rotating plate, when four faces, in the same direction, of the express parcel are not coded, the clamping plates loosen the parcel, and the express parcel is not coded. And the rotating ...

Aviation propeller performance testing device and use method thereof

The invention provides an aviation propeller performance testing device and a use method thereof, the device comprises a rack and a variable pitch assembly, and the variable pitch assembly comprises a power mechanism and a linear motor; the power mechanism comprises a power output shaft of a hollow structure, the power output shaft penetrates through the machine frame from the lower portion of the machine frame, extends to the upper portion of the machine frame and can rotate relative to the machine frame, the part, located above the machine frame, of the power output shaft is provided with a propeller installation position, and a hollow cavity of the power output shaft is provided with a linear motor installation position. The linear motor is arranged on the linear motor mounting position; the power output shaft is provided with an opening for air to enter and exit and an opening sealing piece, and the opening is located between the propeller installation position and the linear motor ...

Application of signal channel in CHD drug development

The invention discloses application of a signal channel in CHD drug development, and belongs to the field of siRNA and application thereof. The invention discloses that a binding site exists between LINC00926 and miR-3194-5p, and after the LINC00926 is silenced, the expression of the miR-3194-5p is up-regulated, so that a JAK1/STAT3 signal channel is inhibited, the dysfunction of human umbilical vein endothelial cells is improved, the proliferation, migration and tube forming capacities of the human umbilical vein endothelial cells are improved, and cell apoptosis is inhibited. The invention provides a new potential target spot for treating CHD, and has obvious application prospect and economic value.

Portable surface feature spectral imaging appearance of general type

... 本专利公开了一种通用型便携式地物光谱成像仪，它包括光谱分析模块、数据采集与处理模块、软件控制模块、安装基座。光谱分析模块采用视场光阑与探测器共轭成像的光学设计，以及通用型标准接口设计，实现成像镜头可切换的精细光谱成像探测；数据采集与处理模块通过多射频复合声光可调驱动技术实现可编程光谱选择，获取目标图像和光谱数据；对软件控制模块进行配置，实现光谱和图像数据实时处理与分析；光机构型采用折转设计，实现仪器紧凑、轻小型。采用本专利实施的仪器，在具备高性能精细光谱成像分析功能的同时，满足体积、重量及多种类环境、功能的特殊要求，适应多应用领域的光谱探测及应用。 ...

Milling cutter type ware of slotting

... 本实用新型公开了铣刀式开槽器，属于建筑装修工具技术领域，包括壳体和设置于壳体内腔的开槽机构，所述开槽机构包括在壳体纵向方向前后错开的开沟轮和立铣刀，所述开沟轮与立铣刀平行设置，所述开沟轮包括在壳体前后方向左右设置的左开沟轮和右开沟轮，所述开槽机构还包括对左、右开沟轮同时驱动的传动系统I和电机I，以及对立铣刀进行独立驱动的传动系统II和电机II。本实用新型通过开沟轮和立铣刀的组合运用，一次性完成开槽，简化了开槽程序，提高开槽效率，同时，实现了机械化作业，极大降低工人的劳动强度，解放了劳动力，另外，立铣刀相对开槽轮换刀更快、型号更多，利于提高开槽效率和适应更广的场合。 ...

Data communication method, communication device and communication terminal in rail transit

The invention discloses a data communication method, a communication device and a communication terminal in rail transit. A receiving host and a communication gateway generate respective corresponding secret keys; any communication gateway needing data communication is selected, identity authentication between the receiving host and the communication gateway is completed, and secure communication is established; the communication gateway transmits the common symmetric key to other communication gateways, and the other communication gateways complete secure communication with the receiving host through the communication key; sending a data communication instruction to each communication gateway through the receiving host; according to the invention, the receiving host and the communication gateways respectively generate the corresponding secret keys, then the identity authentication operation is completed through the secret keys, and the secure communication between the receiving host and ...

Logistics warehouse with monitoring and self-cleaning functions

The invention provides a logistics warehouse with monitoring and self-cleaning functions, and relates to the technical field of logistics warehouses, the logistics warehouse comprises a warehouse body, a goods shelf, a belt conveyor and a cleaning frame, the goods shelf, the belt conveyor and the cleaning frame are all arranged in the warehouse body, the belt conveyor is arranged on one side of the goods shelf, the cleaning frame is arranged at one end of the belt conveyor, and the belt conveyor is arranged in the warehouse body. Moving blocks are movably arranged on the two sides of the cleaning frame, and first pneumatic cylinders are arranged on the outer sides of the moving blocks. The cleaning frame is arranged in the device, before an object package is conveyed, the object package is placed on the cleaning frame, a first pneumatic cylinder pushes a clamping plate to clamp the package, a rotating roller rotates to drive a cleaning belt to operate, a cleaning scraper plate scrapes the ...

Multi-modal radar active deception jamming identification method based on small samples

The invention discloses a multi-mode radar active deception jamming identification method based on small samples, and belongs to the technical field of radar active deception jamming identification. The method comprises the steps of performing signal processing on an obtained radar active deception jamming signal to extract a feature parameter modal data set and a time-frequency image data set, performing Gaussian randomization expansion on the feature parameter modal data set and the time-frequency image data set, expanding the time-frequency image data set by using a handwritten character data set Omnilot data set, and dividing the time-frequency image data set into a support set and a query set; establishing a prototype network based on multi-modal fusion, calculating prototypes of the characteristic parameter modality and the time-frequency image modality according to the support set, and performing characteristic fusion on the prototypes of the characteristic parameter modality and ...

Video processing method and device, equipment and storage medium

The embodiment of the invention provides a video processing method and device, equipment and a storage medium, and relates to the technical field of video processing. According to the method, a video query signaling of a monitoring video is responded, the video query signaling comprises video identification information and video positioning information, and the video positioning information is used for matching at least one monitoring video segment according to a video matching rule. And according to the video identification information, matching a plurality of segments of monitoring videos from a video resource library, and outputting monitoring video clips conforming to the video positioning information from the plurality of segments of monitoring videos. Therefore, the user can accurately position the monitoring video clip which the user wants to watch through the video query signaling, the adjustment efficiency of the monitoring video is improved, and the user experience is improved ...

Dialysis isolation nursing method and system and electronic equipment

The invention relates to the technical field of electric appliance and electronic equipment control, in particular to a dialysis isolation nursing method and system and electronic equipment. The scheme comprises the following steps: starting expression monitoring equipment and key monitoring data monitoring equipment; calculating the anxiety degree of each nursed person according to the video acquisition data obtained by the expression monitoring equipment; obtaining a key monitoring data calculation quantification abnormal index; determining an optimal scheme in a next execution set according to the quantized abnormal index and the anxiety degree of each nursed person; executing according to the optimal scheme; and periodically updating the optimal scheme until no nursed person exists. According to the scheme, anxiety self-evaluation and depression external evaluation are carried out, and quantitative abnormal index optimization is combined, so that comprehensive nursing of minimum anxiety ...

Abnormal cell determination method and device, equipment and storage medium

The invention discloses an abnormal cell determination method and device, equipment and a storage medium, and relates to the technical field of communication. The determination method comprises the following steps: respectively acquiring a first service parameter of a first network type and a second service parameter of a second network type of a target cell; respectively determining a first load state of the first network type and a second load state of the second network type; the first load state is obtained based on the first data service parameter, and the second load state is obtained based on the second data service parameter. And respectively determining a first user perception state of the first network type and a second user perception state of the second network type. And determining an anomaly type of the target cell based on the first load state, the second load state, the first user perception state and the second user perception state. Therefore, the cells of the abnormal ...

Deep foundation pit support system and construction method

The invention discloses a deep foundation pit support system and a construction method, and relates to the technical field of foundation pit support. The device comprises steel piles which are arranged along the side wall of a foundation pit at intervals in a staggered mode, enclosing purlins are fixed to the two side faces of each steel pile respectively, a top beam is fixed to the top of each steel pile, and a supporting base is clamped between the top of each steel pile and the bottom of the top beam; a base matched with the steel pile is fixedly arranged at the bottom of the steel pile, an anchoring part penetrates through the base, and the steel pile is fixedly connected with the base through the anchoring part. Multiple adjusting rods are hinged to the side faces, away from the steel piles, of the enclosing purlins. According to the foundation pit enclosure system, the steel piles which are arranged at intervals in a staggered mode serve as main fixing piles, the supporting bases ...

Fender positioning tool and fender self-adaptive positioning method

The invention discloses a fender positioning tool and a fender self-adaptive positioning method. The device comprises a bottom layer frame, an upper layer frame and a centering mechanism, the bottom of the bottom layer frame is provided with a positioning mechanism used for conducting three-direction positioning with a vehicle body, the upper layer frame is installed above the bottom layer frame through a sliding mechanism, and the X-direction displacement of the upper layer frame relative to the vehicle body can be adjusted through the sliding mechanism; the centering mechanism is installed on the top of the upper-layer frame, Y-direction displacement of the upper-layer frame relative to a vehicle body can be adjusted through the centering mechanism, clamping mechanisms used for fixing a fender are arranged on the two sides of the upper-layer frame respectively, a linkage mechanism is further arranged on the upper-layer frame, and the two ends of the linkage mechanism are connected with ...

Electronic gas meter and assembling method thereof

The invention discloses an electronic gas meter and an assembling method thereof.The electronic gas meter comprises a first shell, a second shell, a connector part, a temperature and pressure sensor module, a film cable and a controller assembly.The electronic gas meter is characterized in that compared with a traditional up-down assembly relation, the first shell and the second shell can be assembled according to the requirement of the installation position; an up-and-down assembly mode or a left-and-right assembly mode is arranged, so that the installation convenience of the electronic gas meter is improved; according to the electronic gas meter, holes do not need to be formed in the meter body, wire passing bolts do not need to be installed, the technology is greatly simplified, the sealing reliability and the production efficiency are improved, and the production cost is reduced; the thin film cable is resistant to folding and aging and good in weather resistance in high and low temperature ...

Movable biogas slurry irrigation system

The invention relates to the field of agricultural appliances, in particular to a movable biogas slurry irrigation system which comprises a first water pump, a smashing device, a biogas slurry conveying pipe and a spray head arranged at a liquid outlet of the biogas slurry conveying pipe, the smashing device is arranged between the first water pump and the biogas slurry conveying pipe, and the smashing device is communicated with the first water pump and the biogas slurry conveying pipe. The crushing device is used for crushing impurities in the biogas slurry, so that the maximum granularity of the biogas slurry impurities entering the biogas slurry conveying pipe is smaller than the diameter of the nozzle runner. According to the movable biogas slurry irrigation system, the crushing device is arranged to crush impurities in biogas slurry, so that the maximum particle size of the biogas slurry impurities entering the biogas slurry conveying pipe is smaller than the diameter of the nozzle ...

River crab quality grading device and method based on visual inspection

The invention provides a river crab quality grading device and method based on visual inspection, and belongs to the technical field of intelligent sorting. The grading device comprises a feeding module, a visual module, a weighing module and a sorting module which are sequentially connected and comprehensively controlled by a control module, and the control module is installed on a supporting rack of the visual module. The visual module collects river crab image data through an industrial camera and a 3D camera and then transmits the river crab image data to the control module, the control module achieves river crab male and female classification through a double population-support vector machine algorithm, the river crab volume is calculated by combining river crab length, width and height data fitting, and the river crab specific gravity is calculated according to the volume and weight data collected by the weighing module. And finally, the sorting module is controlled to sort the river ...

Data acquisition and data sharing method and system based on mine risk monitoring

The invention provides a data acquisition and data sharing method based on mine risk monitoring. The method comprises the steps that a management platform sends a data acquisition instruction; a data acquisition network is constructed and divided into n sub-networks, each sub-network is provided with a plurality of data acquisition points according to the risk indexes, each data acquisition point is connected with a plurality of data acquisition devices, and each data acquisition device performs data acquisition on the corresponding risk index according to the data acquisition instruction; preprocessing the collected data according to the format of the data to obtain standardized data and storing the standardized data; identifying the standardized data to obtain identification data and sharing the identification data. The invention also provides a data acquisition and data sharing system based on mine risk monitoring. According to the invention, a pyramid-type data acquisition network is ...

Network security monitoring equipment

A network security monitoring device disclosed by the present invention comprises a shell and a dust cleaning mechanism, the lower end face of the shell is fixedly connected with a fixed box, the lower end face of the fixed box is fixedly connected with a gear motor, and the output end of the gear motor penetrates through the lower end face of the fixed box and is fixedly connected with a first vertical rod. According to the device, through cooperative arrangement of a gear motor, a first vertical rod, a large gear and a small gear, a second vertical rod can be driven to rotate, the second vertical rod can drive a connecting rod to rotate through a first driving wheel, a first toothed belt and a first driven wheel, and the connecting rod can drive one-way blades to rotate through a worm, a worm gear and a cross rod; the one-way blades rotate to generate suction force and suck heat in the shell into the air bellow, and then the heat is exhausted to the outside through the air outlet, so ...

Track mechanical vibration energy recovery device

The invention discloses a track mechanical vibration energy recovery device, belongs to the technical field of track traffic, and solves the problems that when an existing train runs on a track, the track and roads nearby the track can generate strong vibration, but the vibration energy is not collected in the prior art. The device comprises a power generation device, a stand column, a transmission device, a rotating device and a connecting device. The power generation device comprises a main generator, the stand column is located above the generator, the rotating device comprises a rotating shaft and a supporting seat, the supporting seat is arranged on one side of the generator, the rotating shaft is rotationally connected to the supporting seat, the connecting device connects the rotating shaft with an input shaft of the main generator, and the transmission device connects the stand column with the rotating shaft. Kinetic energy of the stand column is transmitted to the rotating shaft ...

Metal powder 3D printer

The invention relates to the technical field of 3D printing equipment, in particular to a metal powder 3D printer which comprises a bottom plate, an equipment body and a printing assembly, and the printing assembly comprises a partition plate, a mounting frame, a powder discharging cylinder, a powder laying assembly, a transferring assembly and a cleaning assembly; after the printer completes first-time printing, residual metal powder in the forming cabin is firstly cleaned through the cleaning assembly, the metal powder is recycled through the excess material recycling pipe, then an air cylinder in the forming cylinder drags a cylinder sealing plate to move downwards, so that a printed finished product moves downwards to be separated from the forming cabin, and a first sliding block drives the forming cylinder to move; a standby cylinder is arranged in a printing station and matched with an air cylinder to move a finished product into a part taking cabin, a series of work such as powder ...

Rail type storage robot applied to intelligent logistics

The invention discloses a rail type storage robot applied to intelligent logistics, and belongs to the technical field of logistics storage robots. A cleaning shovel is installed at the joint of the middle of the bottom of a cleaning power connection plug-in and the top of a moving guide rail, rotating discs are installed on the four sides of a bottom table, and a moving anchor point induction piece is installed in the middle of the inner wall of the cleaning power connection plug-in; outer adsorption pieces are mounted at the two ends of the outer side of the storage plate, drive the front and rear drive motors in the control process, and move along the moving guide rails in the driving process; when the storage plate moves towards the first power storage feeding and discharging table and the second power storage feeding and discharging table to feeding and discharging attaching grooves in the first power storage feeding and discharging table and the second power storage feeding and discharging ...

Entry generation method and apparatus, and electronic device

The embodiment of the invention provides an entry generation method and device and electronic equipment. The method comprises the steps that information, sent by a document server side, of a document used for generating entries is received; extracting entry elements from the document; and generating an entry based on the entry element. According to the scheme, the entry is generated according to the document of the document server, a user does not need to manually create the entry, the workload of creating the entry is reduced, and the labor cost of entry maintenance can be reduced.

Formula and method for preparing edible and medicinal insect breeding soil by taking waste vinasse as main raw material

The invention belongs to the field of food processing, and particularly relates to a medicine and food dual-purpose insect breeding soil formula taking waste distiller's grains as a main raw material and a preparation method thereof, and the formula comprises the following components by mass: 55%-80% of waste distiller's grains, 5%-15% of peat, 0%-25% of vegetable garden soil and 5%-15% of plant ash; wherein the humidity of the breeding soil is kept at 18%-25%. According to the method, the waste distiller's grains are used as main raw materials, the survival rate of the medicinal and edible dual-purpose insects is increased, the feeding cost is reduced, and the waste distiller's grains become an organic fertilizer through the way of'medicinal and edible dual-purpose insect feeding soil 'through final metabolites of a series of digestion and metabolism processes after the insects and other organisms eat the waste distiller's grains; according to the method, secondary pollution to the environment ...

Convolutional blind source separation method for identifying related noise source of gas turbine

The invention discloses a convolution blind source separation method for gas turbine related noise source identification, and the method comprises the steps: collecting an observation signal of gas turbine noise, and carrying out the synchronous compression transformation of the observation signal, and obtaining a corresponding time-frequency domain complex value signal X; performing instantaneous blind source separation on the time-frequency domain complex value signal X at each frequency point, establishing a complex value normalized boundary objective function, performing iterative optimization based on a subgradient optimization method at each frequency point, and performing blind extraction for multiple times to estimate a separation matrix to obtain a complex value separation matrix and a separation signal; performing permutation calibration on the separation signal by using a power spectrum density distance method, and performing amplitude calibration by using a minimum distortion ...

Chemical molecule graph classification method and system based on graph neural network

The invention provides a chemical molecule classification method and system based on a graph neural network. The method comprises the following steps: representing a chemical molecule graph as a topological graph; generating feature vectors of all nodes and forming a feature matrix; constructing a degree matrix of the topological graph; generating a first neighbor subgraph of each node; calculating a residual sub-graph Laplacian matrix after symmetric normalization of each node, generating a residual whole graph Laplacian matrix, calculating structure coefficients of each node and neighbor nodes thereof, and constructing a structure coefficient matrix; calculating a weighted adjacency matrix; constructing an initial chemical molecule classification model based on the graph neural network; and obtaining a sample graph to train an initial chemical molecule classification model. According to the method, a residual structure is constructed on a local neighbor sub-graph, the relation between ...

Automatic equipment stationing decision-making method considering reliability of power distribution network

The invention relates to an automatic equipment stationing decision-making method considering the reliability of a power distribution network. The method comprises the following steps: establishing a topological model for the connection relationship between internal elements and nodes of the power distribution network; a block Gaussian elimination method is adopted to judge the connection relation of the nodes of the power distribution network; analyzing the influence result of the fault on the load point according to the judgment result of the power distribution network node connection relationship; solving a load reliability index and a system reliability index of the power distribution network by combining an analytic solving method of the reliability of the power distribution network; establishing a target function of the power distribution network automation equipment optimization stationing solving model by combining two parts of investment cost and benefit improvement of the power ...

Chinese complaint classification method based on multi-task learning hybrid neural network

The invention provides a Chinese complaint classification method based on a multi-task learning hybrid neural network, and relates to the technical field of text classification. According to the method, firstly, a knowledge integration enhancement representation model (ERNIE) is used for pre-training an appeal text, then a CNN and BiLSTM mixed neural network is used for replacing a single neural network, the defects of the single neural network are overcome, the competitive advantage of the model is enhanced, then a multi-task learning mode is combined with a deep learning model, learning information is shared among multiple tasks, and the learning efficiency is improved. Therefore, the optimization target can be achieved more quickly, and the learning performance is improved.

Fluorination liquid and preparation method thereof

The invention belongs to the field of fluorine chemical industry, and particularly relates to a fluorination liquid and a preparation method thereof. The preparation method comprises the following steps: taking hexafluoropropylene oxide oligomer and hexafluoropropylene as initial raw materials, putting the initial raw materials into a solvent, and reacting under the catalysis of a catalyst to obtain perfluoropolyether fluorinated liquid; a reaction formula is shown as a formula (I), wherein n is an integer of 2-4. The method has the advantages of mild reaction temperature, fast reaction speed, high reaction yield, safe process, and almost no three wastes, so that the amplification of the product is easy to realize.

Video rebroadcasting method and device, equipment and storage medium

The embodiment of the invention provides a video rebroadcasting method and device, equipment and a storage medium, and relates to the technical field of video processing. According to the method, firstly, a conference summary corresponding to a target conference is obtained and returned by responding to a query instruction of the target conference; the conference summary is obtained by summarizing key points of a conference audio text determined for a target data stream of the target conference, and the conference summary comprises multiple pieces of conference key information. According to the method, a target data stream is acquired, then a video playing instruction generated based on the conference key information is responded, a target video clip associated with the conference key information is matched, the target video clip is generated by editing the target data stream, and finally, the target video clip is returned, so that a user can inquire the conference summary through a terminal ...

Control method of building material purchasing management multi-user system based on cloud computing

The invention relates to the technical field of building material purchasing management, in particular to a control method of a building material purchasing management multi-user system based on cloud computing, and the method comprises the steps: building an Internet transaction platform, inputting supplier information, logging in a purchasing user, producing a transaction order, ending the transaction, and maintaining background data. A purchasing user transactions with a supplier through an internet transaction platform, supplier information and purchasing user information are monitored through background data maintenance and operation, the stability of the internet transaction platform and the accuracy of the information are improved, and by carrying out sampling inspection on supplied products and displaying a production detection report, the production efficiency is improved. According to the method, the purchase safety and the purchase experience of the purchase users are improved ...

Information transmission platform and transmission method for cold storage and distribution of vaccine biological products

The invention discloses an information transmission platform for cold storage and distribution of vaccine biological products and a transmission method thereof, the information transmission platform comprises a central processing unit, a real-time detection unit, a judgment early warning unit, an action feedback unit, a data recording library and an information sharing unit, the output end of the central processing unit is in communication connection with the real-time detection unit; the output end of the real-time detection unit is in communication connection with a judgment early warning unit, and the real-time detection unit in the information transmission platform is arranged in the transportation compartment, so that the vehicle and the transportation state can be detected in real time, and the judgment early warning unit is matched to carry out judgment early warning on data beyond a threshold value; the action feedback unit can send early warning to the control unit and logistics ...

Intelligent and accurate crab feeding system based on computer vision

The invention discloses an intelligent and accurate crab feeding system based on computer vision, and relates to the technical field of crab feeding systems. Comprising an intelligent crab identification subsystem and a feeding control subsystem, wherein the crab intelligent identification subsystem comprises an image acquisition module, and the image acquisition module is used for acquiring on-site images through CCD acquisition equipment; the image recognition module is used for carrying out analysis and recognition based on the collected on-site image; the crab positioning module is used for determining the specific position of the crab according to the position and the shooting angle of the CCD acquisition equipment; and the control module is used for generating a control instruction. By arranging the crab intelligent identification subsystem and the feeding control subsystem, crabs can be reliably positioned, accurate feeding operation is achieved, and manpower is saved; and signal ...

Online quotation error correction system for building material entity merchant

The invention relates to an online quotation error correction system, in particular to an online quotation error correction system for building material entity merchants, and belongs to the technical field of quotation systems. Comprising a data input module, a price information transmission module, a price information docking module, a supplier price database, a price comparison module, a price interval modification module, a price error correction analysis module, a price modification unit, a search instruction module, a price monitoring system and a price display module. The data input module is used for inputting overall information of building material quotation data, the price information transmission module is used for transmitting building material price information, and the price information connection module is used for receiving the building material price information transmitted by the price information transmission module. The error quotation can be accurately positioned, the ...

Electric pitch-variable aviation propeller

The invention discloses an electric variable-pitch aviation propeller which comprises a propeller hub, propeller blades, a variable-pitch rod, a first linear motor and a first linear motor control mechanism. The propeller blades are rotatably connected to the propeller hub; the variable pitch rod is arranged in the propeller hub in the axial direction of the propeller hub and drives the propeller to change the pitch through axial movement. The output end of the first linear motor is connected with the variable-pitch rod, and the first linear motor is used for driving the variable-pitch rod to move axially; a limiting switch is arranged in a circuit system of the first linear motor; and the first linear motor control mechanism is used for controlling the limiting switch. According to the electric variable-pitch aviation propeller, the pitch is changed through electric driving, and the pitch changing time is short; no lubricating oil corrosion exists; a speed regulator is not needed, the ...

Automatic change milling cutter type fluting ware

... 本实用新型公开了一种自动化铣刀式开槽器，属于建筑装修工具技术领域，包括开槽器和可驱动开槽器自动工作的智能驱动系统，所述开槽器包括壳体和设置于壳体内腔的开槽机构，所述开槽机构包括在壳体纵向方向前后错开的开沟轮和立铣刀。本实用新型通过开沟轮和立铣刀的组合运用，一次性完成对墙面的开槽，简化了开槽程序，提高开槽效率，同时，通过智能驱动系统驱动开槽器自动工作，实现了机械化、自动化作业，极大降低工人的劳动强度，解放了劳动力，且进一步提高了工作效率，有利于工程进度及质量的保证和降低操作风险。 ...

Flexible wearable composite material with conductive stability and preparation method thereof

The invention relates to the technical field of conductive stable functional materials, in particular to a flexible wearable composite material with conductive stability and a preparation method thereof.The flexible wearable composite material comprises a flexible substrate, conductive filler, a bonding piece and a flexible top layer, the flexible substrate is filled with the conductive filler, and the bonding piece is used for packaging the conductive filler to the flexible substrate; a packing groove is formed in the flexible substrate, the packing groove comprises Tesla valve grooves, circular grooves and a rectangular groove which are communicated with one another, the number of the circular grooves is three, two of the circular grooves are located on one side of the rectangular groove and are symmetrically arranged, the other circular groove is located on the other side of the rectangular groove, the number of the Tesla valve grooves is two, and the number of the Tesla valve grooves ...

Risk identification and evaluation method based on complex product supplier supply chain

The invention relates to a risk identification and evaluation method based on a supply chain of complex product suppliers, which is used for improving the accuracy of risk evaluation of the complex product suppliers. According to the method, a complex product structure is taken as a core, and a complex product supplier directed graph is generated through mapping according to the corresponding relation between products and suppliers. By calculating the supplier risk of each node, the edge weight between the nodes in the directed graph is used as the risk conduction probability, and based on the risk conduction principle, the final risk of each node supplier is obtained through layer-by-layer convergence and layer-by-layer calculation until a root node. According to the method, the risk of a complex product supplier is calculated, the overall risk change condition of a supplier supply chain and the influence degree of matched products on the whole can be observed, key suppliers are emphatically ...

Anti-sugar composition, essence and production method

The invention belongs to the field of new daily chemical materials, and discloses an anti-sugar composition, which is prepared from the following components in parts by weight: 0.1 to 2 parts of HA60 and 0.1 to 2 parts of Quincine IS anti-oxidation dipolypeptide. The anti-sugar composition has an excellent anti-sugar effect. Meanwhile, the invention further discloses the essence.

Electric control booster with pressure cylinder provided with anti-eccentric-wear transmission mechanism

The invention relates to an electric control booster with a pressure cylinder provided with an anti-eccentric-wear transmission mechanism, and belongs to the field of automobile braking systems. The motor and the hydraulic master cylinder take the valve body as a carrier, the axis is coaxially fixed on the valve body, one end of the transmission mechanism is fixedly connected with the ball screw component, the other end of the transmission mechanism is fixedly connected with the piston, and the piston is in radial sliding fit with the hydraulic master cylinder. The hydraulic cylinder has the advantages that the hydraulic cylinder is novel and reliable in structure, and the transmission push rod, the main cylinder push rod, the spring seat, the spring, the pressing block and the check block structure avoid the problem of brake fluid leakage caused by eccentric wear of a piston when parts are not completely and coaxially matched. The purpose of improving the working reliability and durability ...

Fertilizer injection pipe and fertilizer applicator

The invention relates to the field of agricultural appliances, in particular to a fertilizer injection pipe and a fertilizer applicator, the fertilizer injection pipe comprises a rack, a fertilizer injection pipe body and a furrowing blade assembly are arranged on the rack, the furrowing blade assembly comprises a blade handle and a blade head, the fertilizer injection pipe body comprises a conveying section and a fertilizer falling section, and the central axis of the fertilizer falling section is parallel to the central axis of the blade head; the fertilizer falling section and the shovel head are separately matched, a vibration motor is further arranged on the conveying section, and the vibration motor can make the fertilizer falling section collide with the shovel head in the running state. According to the fertilizer injection pipe disclosed by the invention, the fertilizer falling section and the shovel head are separately matched, so that heat exchange between the fertilizer falling ...

Preparation method of spinning polyacrylic acid magnetic mesoporous carrier for nucleic acid extraction

The invention discloses a preparation method of a spinning polyacrylic acid magnetic mesoporous carrier for nucleic acid extraction. The preparation method comprises the following steps: preparing a spinning magnetic iron oxide nanorod-like carrier core, coating mesoporous silica outside the spinning magnetic iron oxide nanorod-like carrier core, carrying out amino modification on the spinning magnetic iron oxide nanorod-like carrier core, and finally modifying by using an acrylic acid modification layer to obtain the spinning polyacrylic acid magnetic mesoporous carrier. Through the synergistic effect of the spinning magnetic iron oxide nanorod-shaped carrier core, the mesoporous silica structure layer and the polyacrylic acid modification layer, the nucleic acid adsorption sites are improved, the mass transfer rate in the nucleic acid adsorption process is improved, and finally the nucleic acid extraction efficiency is improved.

Intelligent dining table

The utility model discloses an intelligent dining table which comprises a supporting mechanism, a table top assembly, a collecting mechanism and a cleaning mechanism. The dining table can automatically clean residues and tableware on the table top after dining, reduces cleaning work of people on the dining table after dining, liberates labor force, and enables life to be easier. The expenditure of service personnel required by the catering industry is reduced, and manpower and financial resources are saved; the cleaning efficiency is improved, the table top can be rotated, after one side is used, the button can be pressed down, the used table top can be rotated into the table, the clean table top can be turned over and can be immediately used by people, the used table top can be automatically cleaned in the table, and therefore a large amount of time for guests to wait for cleaning the table can be saved, and the service life of the guests is prolonged. The passenger flow volume and the ...

Scanning device for intelligent logistics warehouse in-out scheduling management

The invention discloses a scanning device for intelligent logistics warehouse in-out dispatching management, and belongs to the technical field of intelligent logistics. Two ends of a main rotating rod are sleeved with main gears, the inner walls of the main gears are engaged with driven gears, a warehouse-out conveying belt and a warehouse-in conveying belt are of reverse conveying structures, adsorption sensing parts are extruded in the lifting process, and the adsorption sensing parts are driven to move in the warehouse; after extrusion is sensed, the goods are sucked by starting an air exhaust piece in the goods suction disc, after overturning is completed, a lifting electric telescopic rod is started to push the goods suction disc and an adsorption sensing piece to descend, goods suction is stopped, the goods are placed on the conveying belt, and the goods are continuously conveyed for next operation; in the conveying process, a worker can enter the warehouse through the inner end ...

Fabricated hollow floor structure and manufacturing method

The invention discloses a fabricated hollow floor structure and a manufacturing method, and the method comprises the following steps: S1, bending a first group of reinforcing steel bars into three sections, and splicing the bent first group of reinforcing steel bars to obtain a first reinforcing mesh; s2, the first reinforcing mesh is placed in a first mold, concrete is poured into the first mold, and demolding is conducted to obtain a [-shaped assembly; s3, bending the second group of reinforcing steel bars into three sections, and splicing the bent second group of reinforcing steel bars to obtain a second reinforcing mesh; s4, the second reinforcing mesh is placed in a second mold, and the [-shaped assembly and the second reinforcing mesh are connected; and S5, concrete is poured into the second mold, demolding is conducted, and the fabricated hollow floor structure is obtained. The fabricated hollow floor structure can be obtained through two times of pouring, the manufacturing process ...

Efficient transplanting device with automatic seedling taking and supplementing functions

An efficient transplanting device with an automatic seedling taking and supplementing function comprises a seedling taking device, a seedling falling device and a seedling supplementing device, falling transplanting of pot seedlings is achieved through the seedling falling device, transferring of the pot seedlings is achieved through the seedling taking device, inferior pot seedlings can be recognized in the seedling taking process, only high-quality pot seedlings can be transferred, and the seedling taking device is simple in structure and convenient to operate. And then vacant positions generated by inferior pot seedlings are supplemented through the seedling supplementing device, so that not only can the inferior pot seedlings be removed instead of manual work, but also the pot seedlings can be automatically supplemented under the condition that grabbing fails or the inferior pot seedlings occur, so that the situation that throwing fails due to empty seedling throwing cups is avoided ...

Remote control blowing type aerator

The invention discloses a remote control blowing type aerator which comprises an aeration device and an aeration pipeline, the aeration device comprises a driving turbine, a signal receiving and transmitting module, a dissolved oxygen sensor, a shell, an air inlet turbine and an anchor, the air inlet turbine is fixed in the shell, the dissolved oxygen sensor is fixed outside the shell, and a control circuit and a communication module are fixed in the shell; the oxygenation pipeline comprises a hose, a diverter valve and a foaming stone, the hose is connected with one end of the air inlet turbine, a plurality of branches extend out through a check valve and the diverter valve, and the tail ends of the branches are connected with the foaming stone; the fixing device is used for fixing the whole aerator in water. The invention provides an advanced oxygenation system arrangement scheme for traditional aquaculture.

Method for rapidly constructing sanwichELISA (enzyme-linked immunosorbent assay)

The invention discloses a method for rapidly constructing a sanwich ELISA (enzyme-linked immunosorbent assay), and belongs to the technical field of biologica.According to the method, a co-immunoprecipitation principle is utilized, a known monoclonal antibody is utilized to combine a target antigen, direct screening is performed in a polyclonal antibody, a target antibody sequence is obtained, combination of the sanwich ELISA antibody and the antigen is simulated in the whole process, and the target antibody sequence is obtained. Factors such as overlapping of recognition structural domains of two antibodies and interference of a steric effect of proteins are avoided, and the sanwich ELISA and the corresponding kit are rapidly developed in a time-saving and labor-saving manner.

Multifunctional sorting robot for distribution of automobile parts

The invention discloses an automobile part distribution multifunctional sorting robot, and relates to the technical field of automobile part processing, the automobile part distribution multifunctional sorting robot comprises a conveying table, the conveying table is rotatably connected with a plurality of groups of driving rollers, the driving rollers are sleeved with a material conveying belt, the two sides of the conveying table are fixedly connected with first buckles, and the first buckles are fixedly connected with second buckles; and a connecting rod is rotationally connected to the first buckle, the other end of the connecting rod is sleeved with a second buckle, the second buckle is fixedly connected to the baffle, supporting bases are fixedly connected to the bottom end of the conveying table, and a fixing rod is fixedly connected between the supporting bases. The automobile part conveying device is reasonable in structure, automobile parts are conveyed through the conveying belt ...

Unmanned aerial vehicle positioning method and system

The invention provides an unmanned aerial vehicle positioning method and system. The method comprises the following steps: receiving current unmanned aerial vehicle signal data sent by a plurality of receiving stations; the plurality of receiving stations comprise a master station and a plurality of slave stations which are used for acquiring unmanned aerial vehicle signals; based on the acquisition time in the current unmanned aerial vehicle signal data sent by the plurality of receiving stations, calculating the difference between the arrival time of the current unmanned aerial vehicle signal arriving at each slave station and the arrival time of the current unmanned aerial vehicle signal arriving at the master station; and calculating the current position of the unmanned aerial vehicle by applying an M estimation algorithm based on the difference between the arrival time of the current unmanned aerial vehicle signal to each slave station and the arrival time of the current unmanned aerial ...

Cleaning device and application of cleaning device to side wall welding seam

The invention relates to the technical field of cleaning devices, and discloses a cleaning device and application to a side wall welding seam, the cleaning device comprises a sliding rod, and the sliding rod is provided with a clamping wheel, a locking assembly and a connecting shaft connected with the locking assembly; the support is provided with a driving wheel, a driven wheel, a gas spring and a motor connected with the driving wheel, the driving wheel and the driven wheel are arranged at the two ends of the support, the two ends of the gas spring are connected to the positions, close to the driving wheel and the driven wheel, of the support respectively, and connecting holes are formed in the support; the cleaning ring belt is arranged on the outer sides of the driving wheel and the driven wheel in a sleeving manner; the sliding rod is connected with a connecting hole in the support through a connecting shaft. The cleaning ring belt is kept in an elastic and tight state through the ...

Rock soil collecting device

The invention provides a rock-soil collecting device, and relates to the technical field of exploration, the rock-soil collecting device comprises a main cylinder, a brake seat and a collecting box, the brake seat is arranged at the upper end of the main cylinder, and the collecting box is arranged at the upper end of the brake seat; the main cylinder comprises a collecting cylinder, an outer cylinder and an inner cylinder, the collecting cylinder, the outer cylinder and the inner cylinder are wrapped layer by layer from outside to inside, and the cylinder structure serves as a soil layer drilling collecting end of the collecting device; the device has the beneficial effects that rock-soil drilling and rock-soil collecting work can be completed through the collecting barrel, the outer barrel column and the inner barrel column which are combined layer by layer, and the outer barrel column with the relatively large diameter is used for fixing a soil layer rock-soil structure continuously ...

Method for reducing residual stress of additive manufacturing high-temperature alloy based on hot isostatic pressing

The invention provides a method for reducing residual stress of an additive manufacturing high-temperature alloy based on hot isostatic pressing, which comprises the following steps of: 1) putting the additive manufacturing high-temperature alloy into a hot isostatic pressing furnace, vacuumizing, when the vacuum degree is 10 <-3 >-10 <-4 > Pa, closing a vacuum pump, introducing inert gas into the hot isostatic pressing furnace, heating the additive manufacturing high-temperature alloy, and keeping the temperature for 2-3 hours; heating to a first preset hot isostatic pressure temperature; (2) the additive manufacturing high-temperature alloy is subjected to heat preservation for a first set time under the first preset hot isostatic pressing temperature and the first pressure; raising the temperature of the additive manufacturing high-temperature alloy to a second preset hot isostatic pressing temperature, and keeping the temperature for a second set time at the second preset hot isostatic ...

New energy automobile heater with high yield

The invention provides a high-yield new energy automobile heater, which comprises a heating unit, an inner frame body and an outer frame body made of an insulating material, and is characterized in that the heating unit comprises a heating pipe, fins fixed on the heating pipe and a heating wire positioned in the heating pipe; a plurality of heating units are arranged in the inner frame body in parallel, and two ends of each heating pipe are respectively fixed with the inner frame body; the inner frame body and the outer frame body are both rectangular frames, the inner frame body is fixed to the inner side of the outer frame body, and a space is reserved between the top wall of the inner frame body and the inner peripheral wall of the outer frame body to form a main air duct. The low-temperature air flow in the main air duct can be used for blocking heat damage to the outer frame body caused by the heating unit, and meanwhile waste heat of the outer wall of the inner frame body can be used ...