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2857results about How to "Realize function" patented technology

Monitoring alarm method and system of photovoltaic system

The invention relates to the field of photovoltaic systems, in particular to a monitoring alarm method and system for a photovoltaic system. The method comprises the following steps: performing all-directional thermal imaging scanning on a photovoltaic module array to generate a photovoltaic module multi-directional thermal imaging view; performing temperature distribution analysis on the multi-azimuth thermal imaging view of the photovoltaic module to obtain temperature distribution data of the photovoltaic module; obtaining space structure data of the photovoltaic module based on the multi-azimuth thermal imaging view of the photovoltaic module; performing three-dimensional point cloud reconstruction on the space structure data of the photovoltaic module, and constructing a three-dimensional point cloud structure model of the photovoltaic module; performing abnormal temperature analysis on the three-dimensional temperature distribution field model on the basis of a preset temperature threshold value on the basis of the temperature distribution data of the photovoltaic module so as to generate a local abnormal hot spot region; and performing hot spot region accurate positioning on the three-dimensional point cloud structure model of the photovoltaic module based on the local abnormal hot spot region so as to generate abnormal hot spot module position data. According to the invention, efficient and accurate monitoring alarm of the photovoltaic system is realized.
Owner:SHENZHEN YIBANG IOT TECH CO LTD

Litchi-shaped hollow polymer microspheres as well as preparation method and application thereof

The invention belongs to the field of petrochemical engineering, and particularly relates to a litchi-shaped hollow polymer microsphere as well as a preparation method and application thereof. The preparation method comprises the following steps: preparing litchi-shaped polymer hollow microspheres by adopting an inverse emulsion polymerization method, uniformly dispersing a water-soluble initiator and a water-soluble monomer solution in an oil-phase continuous phase under the emulsification action of a surfactant, and initiating polymerization in a water-in-oil reaction system through modified mesoporous microspheres loaded with metal copper quantum dots. Because the initiation rates of the water-soluble initiator and the metal copper quantum dots are different, a litchi-shaped structure is presented on the surface of the microsphere, and then the template is etched to form the litchi-shaped hollow-structure microsphere. The hollow structure in the microsphere improves the elastic deformation capacity of the microsphere, and the litchi-shaped appearance of the microsphere can play a better plugging effect, so that the dual functions of'displacement 'and'plugging' of the microsphere are really realized.
Owner:SUZHOU CHUXIN MOYI TECH CO LTD

Live broadcast method and device for free matching combined type e-commerce operation

The invention discloses a live broadcast method and device for free matching combined e-commerce operation, and the method comprises the steps: S1, collecting and analyzing user data, and building a user portrait; s2, based on the user portrait and the real-time behavior data, generating and dynamically updating a personalized commodity recommendation list; s3, in the live broadcast process, the anchor displays a commodity combination effect and provides a real-time interaction function; s4, virtual reality and augmented reality technologies are adopted to realize virtual commodity display and trial; s5, analyzing the real-time behavior data of the user by using an improved collaborative filtering algorithm, and recommending related commodities; s6, analyzing the emotional tendency of the user in interaction by adopting a multi-modal fusion emotion analysis algorithm, and providing personalized interaction suggestions for the anchor; and S7, providing an integrated online shopping function, and supporting the user to seamlessly complete the purchase operation. Through the technical steps, the personalized shopping experience of the user is improved, the live broadcast interactivity is enhanced, and the method has the beneficial effects of high recommendation accuracy, strong participation sense of the user and the like.
Owner:BAOXIAN INFORMATION TECHNOLOGY (SHANGHAI) CO LTD

Marketing data link abnormity diagnosis method, system and device and storage medium

The invention discloses a marketing data link abnormity diagnosis method, system and device and a storage medium. Relates to the technical field of power system data management. At present, the problems of multi-source data format difference, lack of real-time anomaly detection mechanism and low data management efficiency exist in anomaly diagnosis. The method comprises the steps that multi-source heterogeneous data of a marketing data link is collected in real time, and data cleaning, missing value filling and abnormal value processing are completed; extracting statistical characteristics of the link data, performing clustering analysis on the data, and generating a self-supervision label; constructing a support vector machine classification model, and detecting normal and abnormal data in the link; optimizing the anomaly detection model through a deep neural network; and realizing interpretability analysis and decision support of anomaly diagnosis by using a multi-classification result generated by the LSTM model and a self-supervised learning strategy. According to the invention, data link abnormity diagnosis is efficiently and intelligently realized, and data quality management, abnormity detection precision and service decision support capability are improved.
Owner:STATE GRID ZHEJIANG ELECTRIC POWER CO MARKETING SERVICE CENT +1

Electric power resource intelligent control system based on digital twinning

The invention relates to the technical field of electric power system control, in particular to an electric power resource intelligent control system based on digital twinning, which comprises a data acquisition module, a digital twinning model module, an electric power dispatching module, a fault early warning module and a three-dimensional visualization module. According to the method, the load demand prediction model is established based on the hybrid RNN, the RNN and full-connection network hybrid neural network model is constructed, the historical time sequence, the time feature, the historical statistical feature and the similarity feature are learned, and the problem that the power load demand is difficult to predict due to renewable energy source grid connection and power demand increase is solved; a power dispatching decision is made through a multi-objective function optimization algorithm based on an improved particle swarm, the particle swarm optimization algorithm is improved by adding a variation strategy for high-fitness particles, the problem that the particle swarm optimization algorithm is prone to falling into a local optimal solution in the practice process is solved, and therefore the problem that power dispatching of multi-objective optimization is difficult to achieve is solved.
Owner:SHENZHEN POWER SUPPLY BUREAU

Intelligent data information rapid checking and question-answering system

The invention discloses an intelligent data information rapid checking and question-answering system, which relates to the technical field of intelligent data information and comprises a document import module, a vectorization analysis module, an NLP processing module, a question-answering matching module and a result output module. The document import module is used for receiving and importing documents including but not limited to PDF, DOC, TXT and PPT, analyzing the documents in different formats by adopting corresponding libraries and tools, identifying and classifying the files by identifying title formats and question number formats when processing the files in test questions and test paper formats, and performing preliminary analysis on the contents of the documents by utilizing a machine learning algorithm; according to the invention, the system not only can realize the rapid checking and question-answering functions of documents, but also can be applied to the field of educational training, realizes the online editing, management and test paper formation of test questions, reduces the manpower consumption in basic training business, and integrally improves the working quality and efficiency; meanwhile, the system can help enterprises to carry out internal training and examination, and improves the practicability and application range of the system.
Owner:HANGZHOU WORTH TECH CO LTD

Interventional device for tubular bodies

An interventional device for a tubular body, comprising: a stent switchable between a first state and a second state, the diameter of the stent in the second state being greater than the diameter of the stent in the first state; the at least one puncture part is arranged on the stent, and the puncture part is used for puncturing the wall of the tubular body when the stent is in the second state; the at least one electrode is arranged on the at least one puncture part, and the electrode is used for extending out of the tubular body from the area, punctured by the puncture part, of the wall. By means of the scheme, effective implantation of the electrode can be achieved based on the intervention device, the implanted electrode can make direct contact with the biological tissue target area outside the tubular body, direct and non-barrier signal interaction is achieved, and the signal collecting and stimulation applying effects of the electrode are greatly improved.
Owner:SHANGHAI STAIRMED TECHNOLOGY CO LTD

Genome prediction method and model for corn genotype and environment cross-modal feature fusion

The invention provides a corn genotype and environment cross-modal feature fusion genome prediction method and model, a deep learning method is adopted to model a complex nonlinear transformation relationship between different omics data including a genome and an environment group, and a GECFGP model is constructed to fuse corn cross-genotype and environment interaction features. Time sequence characteristics and important growth periods related to phenotypes are well mined, and the function of predicting the phenotypes of the complex agronomic traits of the corn is achieved. The method shows high robustness in different experimental settings, has superiority in genome prediction of G * E interaction, explores phenotype-related important growth periods and performance of predicting phenotypes across different years, provides a new thought for a genome prediction analysis method, and has wide application prospects. Therefore, theoretical and application value reference is provided for adaptability analysis of corn in different environments and exploration of key growth periods, and development of the field of intelligent breeding is accelerated.
Owner:HUBEI HONGSHAN LABORATORY

Automatic flexible butt joint oil extraction system and method for transformer

The invention belongs to the technical field of power robots. The transformer automatic flexible butt joint oil taking system comprises an oil taking box and an oil taking robot, the oil taking robot comprises an oil taking robot chassis, an automatic butt joint device and an oil sample extracting device, and the automatic butt joint device and the oil sample extracting device are installed on the oil taking robot chassis; the oil taking tank comprises a flexible butt joint oil taking opening fixed to an oil taking tank body, a fixed rod and a movable rod assembly, the automatic butt joint device comprises a guiding butt joint mechanism and a flexible butt joint oil taking mechanism, and the guiding butt joint mechanism is used for being matched with the fixed rod and the movable rod assembly for guiding butt joint. The flexible butt joint oil taking mechanism is used for being in flexible butt joint with the flexible butt joint oil taking opening. Manual operation is replaced through automatic cooperation of the oil taking robot and the oil taking tank, the automatic docking device is applied, the operation process is optimized, the operation and maintenance efficiency and safety of the electric power system are improved, and the risk of manual operation is reduced.
Owner:STATE GRID INTELLIGENCE TECHNOLOGY CO LTD

Micro-fluidic chip device for cell fusion and in-situ sorting

The invention discloses a micro-fluidic chip device for cell fusion and in-situ sorting. The micro-fluidic chip device comprises a PDMS (Polydimethylsiloxane) micro-fluidic chip, a PCB (Printed Circuit Board) and a patterned gold electrode micro-array layer which are sequentially arranged from top to bottom, the PDMS micro-fluidic chip is provided with a sample inlet, a sample outlet and a collection cavity, and the sample inlet, the sample outlet and the collection cavity are communicated through the experiment cavity; a plurality of independent channels and a capturing cavity connected with the independent channels are arranged in the experiment cavity, and a double-cavity capturing structure is arranged at an inlet of the capturing cavity; and an independent microelectrode matched with the double-cavity capture structure is arranged on the patterned gold electrode microarray. The independent microelectrodes on the patterned gold electrode microarray layer are matched with the double-cavity capture structure, so that cell capture, cell electrofusion and cell in-situ release can be realized in the same chip, and cells in the double-cavity capture structure can be controlled more accurately.
Owner:CHONGQING UNIV

Database integrity verification method, device and system, medium and equipment

The embodiment of the invention discloses a database integrity verification method, device and system, a medium and equipment, and the method comprises the steps: firstly, injecting a section enhancement code at a preset tangency point position of a database; then, when a modification operation for the database is received, executing the section enhancement code to generate a verification hash value corresponding to the modification operation; and further, calling a password service of a trusted third party, and performing data signature on the target data corresponding to the modification operation by the verification hash value through the password service. And finally, verifying the database data based on a hash operation message authentication code obtained by verifying the hash value and the data signature so as to determine whether the database is tampered or not.
Owner:ALIPAY (HANGZHOU) INFORMATION TECH CO LTD

Air blower based on magnetic and air combination axial force balance and control method thereof

The invention relates to an air blower based on magnetic and gas combination axial force balance and a control method of the air blower, and belongs to the technical field of axial force regulation and control of air blowers. An axial air suspension bearing and an axial magnetic bearing are arranged in a main machine of the air blower, the axial magnetic bearing is connected with a magnetic bearing controller, and the magnetic bearing controller controls the axial position of a rotor by controlling the current of the axial magnetic bearing; an axial displacement sensor and a radial displacement sensor are arranged to detect the displacement of the rotor; and the main controller is used for controlling the starting and stopping of the axial magnetic bearing and the main machine based on the axial displacement and the radial displacement of the rotor, and sending out early warning. According to the magnetic and air combined axial force balance device, the axial magnetic bearing is used for providing active control force, the air bearing is used for providing passive support, the stability and reliability of a system are improved, and an important protection effect is achieved on core parts of an air blower.
Owner:SHANDONG ZHANGQIU HUADONG BLOWER

Non-ideal ISAC system beam forming method with anti-eavesdropping capability

The invention discloses a non-ideal ISAC system beam forming method with an anti-eavesdropping capability, which is characterized in that a base station is intelligently optimized to transmit beam forming so as to ensure that radar sensing requirements are met under the condition of limited power resources, and attacks of potential eavesdroppers and guards are effectively resisted, so that the anti-eavesdropping capability of the non-ideal ISAC system is improved. Therefore, the safety communication and covert communication performance of system communication users is obviously improved. Specifically, according to the method, a safe ISAC scene which has potential eavesdroppers and guards at the same time, legal nodes of a system have hardware damage, and CSI of illegal nodes cannot be obtained perfectly is considered, and in order to guarantee safe communication and sensing performance, a legal signal energy minimization optimization problem is established. And then, the original problem is converted into a convex optimization problem by utilizing a positive semidefinite relaxation technology and an S process technology, and the convex optimization problem is solved by utilizing a CVX toolbox, so that the strategy effectively ensures the safety communication and target sensing performance of the system under limited power resources, and the complexity of the problem is reduced.
Owner:NINGBO UNIV

Key switch and socket

The invention discloses a key switch and a socket, and relates to the technical field of electric appliances. The key switch comprises a shell, an overload protection piece, a movable contact piece, a first terminal and a pressing assembly, the shell is provided with an installation cavity, and the overload protection piece with the static contact and the movable contact piece with the movable contact are located in the installation cavity; the first terminal comprises an input terminal and an output terminal which are mutually independent, and the input terminal and the output terminal are respectively connected with the overload protection piece and the movable contact piece; the pressing assembly is installed on the shell and located on the side, away from the overload protection piece, of the movable contact piece, and the pressing assembly can be pressed to enable the movable contact to move in the direction close to the static contact. When the movable contact is in contact with the static contact, the input terminal and the output terminal are electrically conducted; and the overload protection piece is configured to drive the static contact to be separated from the movable contact when the current flowing through the overload protection piece exceeds a set threshold value. Therefore, the key switch and the socket disclosed by the invention are simple in structure and small in occupied space.
Owner:GONEO GRP CO LTD

OFDM-LFM (Orthogonal Frequency Division Multiplexing-Low Frequency Modulation) flux-inductance integrated signal waveform receiving method and equipment based on fractional Fourier transform

The invention discloses an OFDM-LFM (Orthogonal Frequency Division Multiplexing-Local Frequency Modulation) integrated signal waveform receiving method and equipment based on fractional Fourier transform, LFM and OFDM are combined and improved, an OFDM-LFM integrated radar communication signal taking an orthogonal LFM signal as a subcarrier is adopted, and as the LFM subcarrier has larger Doppler tolerance, compared with a normal subcarrier, the OFDM-LFM integrated signal waveform receiving method and equipment based on fractional Fourier transform have higher Doppler tolerance, the radar communication signal can be received more accurately. The method not only can improve radar distance resolution and spectral efficiency, but also has a strong capability of avoiding Doppler effect, and can reliably transmit information, and when OFDM-LFM signals are received, in order to solve the problems of subcarrier frequency linear transformation, radar parameter extraction and the like, based on the sensitivity of fractional Fourier transform (FRFT) to LFM signals, the method can be used for solving the problems of subcarrier frequency linear transformation, radar parameter extraction and the like. According to the invention, the FRFT is used as the integrated signal receiver, the separation of the integrated signal communication receiver and the radar receiver is realized, and the system performance is improved while the complexity of the system is reduced.
Owner:SOUTHWEST JIAOTONG UNIV

Heat dissipation system and method for server of Internet of Things

The invention discloses an Internet of Things server heat dissipation system and method, and relates to the technical field of server heat dissipation, and the system comprises a cooling device, a heat dissipation device, a circulation device, a server housing, and a supporting device. According to the heat dissipation device, a water-cooling rotating shaft is driven by cooling liquid to rotate anticlockwise, at the moment, the air-cooling rotating shaft is limited by an arc-shaped ring to rotate anticlockwise, the water-cooling rotating shaft drives a second friction wheel to rotate anticlockwise through a limiting block and a semicircular lantern ring, the second friction wheel drives a first friction wheel and air-cooling fan blades to rotate, and therefore the deflection angle of the air-cooling fan blades is changed; when the air cooling fan blades are parallel to the end face of the air cooling rotating disc, the cleaning assembly can automatically pop up and clean the air cooling fan blades. According to the cooling device, cooling liquid in the circulating device enters a second cooling pipe or a third cooling pipe under the action of gravity, then the cooling liquid enters the flow control cylinder, and then the flow control cylinder is combined and communicated through a first cooling pipe or a fourth cooling pipe, so that integrated control over the cooling liquid and the air cooling fan blades is achieved.
Owner:XIAN AERONAUTICAL UNIV

Semi-fragile diffusion watermarking method and system based on elliptic curve

The invention discloses a semi-fragile diffusion watermarking method and system based on an elliptic curve. The method comprises the following steps: constructing first-stage watermark information for tampering detection and second-stage watermark information for model traceability based on the elliptic curve; the method comprises the following steps of: performing first-stage watermark information embedding in a back stage of denoising through a diffusion process based on initial noise to obtain hidden space noise, introducing an extractor for extracting second-stage watermark information from an image generated by a fine-tuning decoder, and taking the second-stage watermark information as a label, embedding of two-stage watermark information is realized by pre-training an extractor and finely adjusting a decoder; the method comprises the following steps: extracting two-stage watermark information from a to-be-detected image by using a pre-trained extractor to realize model traceability, and detecting whether the to-be-detected image is tampered or not by comparing added noise estimated from hidden space representation inversion with the first-stage watermark information. Therefore, whether the image is maliciously tampered or not can be detected while the diffusion model corresponding to the image is traced.
Owner:ZHEJIANG JUNTONG INTELLIGENT TECH CO LTD

Wireless communication interference automatic identification and adaptive optimization system and method

The invention provides a wireless communication interference automatic identification and adaptive optimization system and method, and the method comprises the steps: a signal data collection module is used for carrying out the collection of original signal data; the signal analysis and identification module is used for preprocessing the collected original signal data to obtain preprocessed signal data; the deep learning algorithm module is used for carrying out model training through the neural network model building module based on the preprocessed signal data, carrying out feature extraction through the interference feature extraction module, and carrying out feature extraction according to the trained model and the extracted features; self-adaptive adjustment processing is carried out through the self-adaptive adjustment module, and signal optimization processing is carried out through the self-adaptive optimization module. According to the invention, wireless communication interference automatic identification and adaptive optimization functions can be realized.
Owner:CHINA UNITED NETWORK COMM GRP CO LTD

Full-automatic laser outer diameter detection equipment and method

The invention relates to the technical field of laser outer diameter detection, and discloses a full-automatic laser outer diameter detection device and method.The full-automatic laser outer diameter detection device comprises an operation platform, an electric conveying belt is arranged on one side of the operation platform, and a laser diameter measuring instrument body is fixedly connected to the top of the operation platform. Through the design of the feeding mechanism, a steel pipe to be subjected to outer diameter detection is conveyed to a material receiving frame on an electric conveying belt, the steel pipe and a guide groove are placed in the horizontal direction after rolling, after a first motor works, a moving plate moves to push the steel pipe to the direction of a laser diameter measuring instrument body, and the purpose of automatic feeding is achieved; the second electric push rod pulls the first support downwards, a positioning wheel on the inner side of the first support is made to be lower than a positioning wheel on the inner side of the second support, the end, facing the first support, of the steel pipe inclines downwards, and finally the steel pipe slides out downwards under the influence of gravity, so that the automatic feeding and discharging functions are achieved. And the situation that manpower is consumed due to manual operation is avoided.
Owner:JIANGSU ZHONGYING JINGTE TECH CO LTD

Preparation method of antibacterial degradable sponge material

The invention relates to the field of sponge materials, and provides an antibacterial degradable sponge material and a preparation method thereof. The material is prepared from protocatechuic acid modified quaternized chitosan, quaternary ammonium salt grafted gelatin, sodium alginate, polyhydroxybutyrate, polycaprolactone, a polylactic acid-glycolic acid copolymer, hexamethylene diisocyanate, a foaming agent, nano cellulose, vitamin E, polyethylene glycol, triethylamine and dimethylformamide. Protocatechuic acid and quaternized chitosan are subjected to amidation modification, and chitosan and gelatin are subjected to quaternization treatment by adopting 2, 3-epoxypropyl trimethyl ammonium chloride, so that the antibacterial property and biodegradability of the material are improved. In the material preparation process, through vacuum degassing, foaming vacuum degree and humidity control and a multi-step drying process, it is ensured that the average pore size of the material is uniform (50-200 microns) and the porosity is high (50%-90%), and the obtained material has excellent antibacterial property and degradability and has wide application value.
Owner:NANTONG FENGSHENG TEXTILE CO LTD

Code-changeable key password padlock

According to the key password padlock capable of changing the password, the lock beam is pushed out of the shell through vertical pushing of the movable plate, unlocking and locking are conducted in this way, the limiting protrusion on the pressing column can play a role in stopping the movable plate from moving, and if no password is input (the pressing column is not pressed), unlocking is not conducted. The limiting protrusions correspond to the limiting protrusions on the movable plate, so that the movable plate is prevented from moving, after a password is input, the limiting protrusions and the limiting protrusions on the movable plate are staggered, and at the moment, the movable plate can move up and down to conduct unlocking operation. The whole structure is simple, and the function of the lock body is achieved mainly through cooperation of the movable plate and the pressing column.
Owner:WENZHOU XINMIMA COMBINATION LOCK CO LTD

Hollow electrical stimulation electrode array device and preparation method thereof

The invention provides a hollow electrical stimulation electrode array device and a preparation method thereof, and belongs to the technical field of medical instruments, the hollow electrical stimulation electrode array device comprises a substrate and a microneedle array, the substrate comprises a substrate base body, a first conductive lead, a second conductive lead and a substrate insulating layer, the first conductive lead and the second conductive lead are oppositely arranged and are laid on the first surface of the substrate base body at a certain interval; the microneedle array comprises a microneedle array base body, and a hollow channel used as a drug delivery channel is formed in a microneedle base body of the microneedle array base body. An electroporation electrode is improved to be a hollow electrode, medicine in a liquid storage tank can enter intracellular fluid through a hollow channel, the medicine can be injected into a human body through a medicine feeding opening by adopting the hollow electrode, then electroporation is applied to open nanometer through holes of a cell membrane, the medicine enters the intracellular fluid, the steps are simple, the cost is low, and the efficiency is high. The infection risk and the treatment cost of a user are reduced, and due to the design of the liquid storage pool, the functions of medicine storage and injection buffering can be achieved.
Owner:PEKING UNIV

Warehousing device and warehousing system

ActiveCN222292652URealize functionImprove the efficiency of inbound and outboundStorage devicesDatabaseReal-time computing
The embodiment of the utility model provides a warehousing device and a warehousing system. The warehousing device comprises a first robot goods shelf and a second robot goods shelf, the first robot goods shelf comprises a first storage space used for storing containers and a first containing space used for containing the second robot goods shelf. The second robot goods shelf comprises a second storage space used for temporarily storing the containers and a second containing space used for allowing a second robot to move the second robot goods shelf; the warehousing system comprises a warehousing device, a first robot and a second robot. The first robot is installed on the first robot goods shelf and can pick and place containers between the first robot goods shelf and the second robot goods shelf so as to achieve the goods tallying function; and the second robot can drive the second robot shelf to move between the first robot shelf and the destination, so that the warehouse-in and warehouse-out efficiency is improved.
Owner:HANGZHOU HIKROBOT TECH CO LTD

Multi-degree-of-freedom mechanical arm obstacle avoidance path planning method and system

The invention provides a multi-degree-of-freedom mechanical arm obstacle avoidance path planning method and system, and relates to the technical field of robot obstacle avoidance. According to the method, forward kinematics is used for solving the transformation relation and three-dimensional coordinates of all joints of a mechanical arm, a working space of the mechanical arm is generated, modeling is conducted on an obstacle in the working space, and a corresponding obstacle space is generated; building an obstacle avoidance space, generating a preliminary global path, optimizing the preliminary path, calculating the movement speed, the acceleration and the joint limit moment of the mechanical arm, comprehensively generating a maximum obstacle avoidance angle, comparing the obstacle avoidance angle of each joint with the maximum obstacle avoidance angle, screening extreme joint angles, and counting the number of the extreme joint angles. And calculating a redundancy degree of freedom and setting a threshold value, and if the redundancy degree of freedom exceeds the threshold value, determining that obstacle avoidance succeeds and path planning is effective. According to the method, the obstacle avoidance space of the mechanical arm is determined, the path is optimized, and the redundant degree of freedom is managed and evaluated, so that effective obstacle avoidance of the mechanical arm in a complex environment is realized.
Owner:WUHAN UNIV OF SCI & TECH

Wafer positioning device for glue coating and developing machine

The present invention belongs to the technical field of semiconductor integrated circuit manufacturing, and discloses a wafer positioning device for a coating and developing machine, including a base and a pillar, a mounting cylinder is installed on the top of the pillar, a wafer is arranged above the mounting cylinder, a No. 1 cavity and a No. 2 cavity are provided inside the mounting cylinder, and an air pressure hole connected to the No. 1 cavity is provided, and a telescopic rod is installed in the inner cavity of the No. 1 cavity. This device adopts a relatively gentle way to realize the positioning function of the wafer, by providing a supporting mechanism to support the wafer in advance, and using a rotator to rotate the outer surface of the supporting column, so that the roller realizes the synchronous function of self-rotation and revolution, and can rotate and adapt the displacement of the wafer in any direction. This design realizes the full rotation support of the roller to the bottom of the wafer, completely avoiding the sliding friction of the supporting component to the wafer due to the relative displacement during the positioning process, and greatly reducing the wear and damage of the wafer.
Owner:冠礼控制科技(上海)有限公司

Preparation method of amphiphilic carbon dots, amphiphilic carbon dots and application of amphiphilic carbon dots

The invention discloses a preparation method of an amphiphilic carbon dot, the amphiphilic carbon dot and application of the amphiphilic carbon dot. According to the amphiphilic carbon dots, at least one of phenol, catechol, resorcinol or hydroquinone is used as a first precursor, and at least one of urea, aniline, o-phenylenediamine or 1, 2, 4-triaminobenzene is selected as a second precursor; after mixing and dissolving, reacting for 4-8 hours under the condition of 180-220 DEG C to prepare initial carbon dots; separating and purifying the initial carbon dots in a chromatographic column, collecting a second component, removing the solvent through rotary evaporation, and drying to obtain the amphiphilic carbon dots. The degreasing agent prepared from the obtained amphiphilic carbon dots has strong adsorption capacity, low toxicity and good stability, can effectively remove oil stains, has the characteristic of low foam in the use process, simplifies the cleaning process and improves the efficiency.
Owner:JIANGSU XUE BAO DAILY CHEM CO

System authority management method based on composite authority access control model

The invention relates to the technical field of authority management, in particular to a system authority management method based on a composite authority access control model, and the method comprises the steps: obtaining user information, dynamically allocating roles for users, and dynamically allocating authorities for the roles; establishing association between the operation corresponding to the authority and the object; adding tasks and tense constraints in the association of the operation and the object; according to the system function and the user environment, the length of a permission chain is controlled by selecting a matrix so as to associate the system permission, and the permission chain comprises one or more of a user, a role, a task, an operation and an object. Establishing a data storage strategy matched with the composite permission access control model, and constructing a corresponding database according to the data storage strategy to store user, role, object, operation and permission data; setting a data sharing strategy; in the data transmission process, sensitive data in a database is encrypted, and an access control strategy, an auditing and monitoring strategy and an emergency response strategy are set.
Owner:CHINA UNICOM (JIANGSU) IND INTERNET CO LTD

Alternating current-direct current converter for realizing bidirectional current flow based on primary energy conversion

The invention provides an AC / DC converter for realizing bidirectional current flow based on primary energy conversion, and relates to the technical field of converters. The AC / DC converter is used for realizing a single-phase rectification function or an inversion function; when a single-phase rectification function is realized, a first end and a second end of the AC-DC converter are respectively connected with two ends of an AC power supply, and a third end and a fourth end of the AC-DC converter are respectively connected with two ends of a load. When the inversion function is realized, the third end and the fourth end of the AC-DC converter are respectively connected with the two ends of the DC power supply; in the off-grid mode, the first end and the second end of the AC-DC converter are connected with the two ends of the load respectively. In the grid-connected mode, the first end and the second end of the AC-DC converter are connected with the two ends of the power grid respectively. According to the invention, a forward rectification function and a reverse-phase inversion function can be realized by adopting primary energy conversion, fewer devices are used, fewer sampling circuits are used, the equipment cost is lower, and the size is smaller.
Owner:HUNAN UNIV

Airplane deicing / electromagnetic low-scattering compatible structure and design method thereof

The invention relates to the field of electronic materials, in particular to an airplane deicing / electromagnetic low-scattering compatible structure and a design method thereof. The periodic high-wave-transmission electric heating impedance network is adopted, the impedance network is conformal to the wave absorbing structure, and the high-wave-transmission-rate performance is achieved through the patterning design of the impedance network; and the key icing area on the surface of the wave-absorbing structure is optimized to carry out partition resistance regulation and control, so that the purposes of partition heating and heat concentration adjustment are achieved, and more targeted deicing is achieved. According to the invention, the functions of electric heating deicing and electromagnetic low scattering can be realized at the same time, the deicing requirement of an airplane in a high-altitude or cold environment can be met, so that the flight safety of the airplane is protected, and the electromagnetic low scattering function of the airplane is not influenced. The method is expected to be applied to safety protection and electromagnetic compatibility of low detectable aircrafts in the future and becomes an important technical accumulation.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA

Self-adaptive exoskeleton robot

The invention discloses a self-adaptive exoskeleton robot which comprises a hand exoskeleton device used for capturing the degree of freedom of hand joints of 20 persons at the same time and conducting force feedback. The perception and force feedback system is used for data acquisition and master control driving and is matched with IO resources of a master control chip; the self-adaptive wearing module is used for sewing the finger exoskeleton to a light, thin and elastic fiber glove, the wearing mode is reinforced through a restraint ring, and meanwhile, an exoskeleton palm structure is designed to be a variable structure capable of being attached to the back of the hand in a self-adaptive mode; the man-machine interaction module is used for man-machine interaction; and the master-slave control system realizes master-slave control. According to the invention, the bionic flexible muscle optimization design, the force feedback technology and the touch force sensor integrated with force feedback are adopted, so that the force of a user can be acquired, and a foundation is laid for force closed-loop control.
Owner:KUNSHAN ZHIBO MICRO INTELLIGENT TECHNOLOGY CO LTD