33results about How to "Resolve incompatibilities" patented technology

The invention relates to the technical field of industrial automation, and discloses a method for detecting abnormal operation of industrial control equipment based on industrial control protocol analysis, which comprises the following steps of: 1, acquiring operation data of the industrial control equipment through at least one industrial control protocol which is a Modbus protocol, an OPC UA protocol or a PROFIBUS protocol, the operation data comprises sensor data, register data and equipment state data of the equipment; and 2, analyzing the collected data packet by using a protocol analyzer, extracting key information related to the equipment operation state, the key information comprising parameters such as equipment working frequency, load, vibration, temperature and pressure, and converting the key information into a uniform data format. By collecting, analyzing and analyzing the operation data of the industrial control equipment in real time, abnormal conditions in operation of the equipment can be found in time, spreading of equipment faults is avoided, and stable operation of the equipment is guaranteed.

The invention provides a 3D printing lining ground test device fusing in-situ laying of reinforcing steel bars. The device comprises a stirring and pumping module, a 3D printing lining module, a 3D printing lining mechanical arm, a reinforcing steel bar in-situ laying module, a reinforcing steel bar in-situ laying mechanical arm and a tunnel ring, the 3D printing lining module comprises a spray head, and the reinforcing steel bar in-situ laying module comprises a flexible reinforcing steel bar clamping head and a structured light camera; the stirring and pumping module stirs to prepare a fresh concrete material and pumps the material to the 3D printing lining module, the material pumped to the 3D printing lining module is printed in the tunnel ring through the spray head, and the flexible steel bar clamping head clamps and places a steel bar on the printed concrete. And the structured light camera scans the tunnel section morphology and the surface morphology of the printed lining part, and provides data support for motion planning of the mechanical arm. The method has great application potential in simplifying the lining construction process and efficiently building the long-term stable tunnel.

The invention provides a page code generation method and device, electronic equipment and a storage medium, and the page code generation method comprises the steps: determining target component configuration information adaptive to different types of fields in a JSON configuration file of a CRUD page to be developed; performing code generation based on the configuration information of each target component and a preset EJS template, and determining a front-end React Type file code of the CRUD page to be developed; wherein the preset EJS template is an EJS template which is extracted from common codes of different CRUD pages in advance based on React project specifications. By using the method, the code generator can solve the technical problems that an existing low-code development platform does not have a unified standard and is high in learning cost, and existing old project code splitting and customization extension are limited, the development efficiency of an existing reaction front-end system is greatly improved, and project iteration online time is shortened.

The invention relates to a novel power system power supply planning method based on a reliability evaluation feasible region. In order to solve the problem that time sequence reliability simulation and power supply switching decision modeling optimization are not compatible in mathematical structure in the existing novel power system power supply planning, the method comprises the following steps: selecting a characteristic power supply type for each level year, and generating a characteristic power supply potential operable quantity decision sample set with a reliability evaluation label; based on the decision sample set, utilizing a recursion strategy of an embedded L-BFGS algorithm to train an oblique decision tree model, utilizing a depth-first search strategy to extract a reliability evaluation feasible region, and expressing the reliability evaluation feasible region in a logic or constraint form; and a convex hull modeling method is utilized to convert logic or constraint into mixed integer linear constraint, the mixed integer linear constraint is integrated into the new and old power supply switching decision and unit combination integrated optimization model, a novel electric power system power supply planning model embedded with a reliability evaluation feasible region is formed, and then novel electric power system power supply planning is realized based on the model.

The invention belongs to the field of artificial intelligence and big data, and relates to an artificial intelligence-based verbal skill quality inspection method, which comprises the following steps of: obtaining session information, and converting the session information into to-be-identified text information; based on a pre-trained sentiment analysis model, analyzing whether the to-be-recognized text information has a sentiment guiding behavior or not; if the to-be-identified text information does not exist, performing illegal behavior identification on the to-be-identified text information based on an illegal rule base and a pre-trained quality inspection model, and judging whether an illegal behavior exists or not; and if the emotion guiding behavior or the illegal behavior exists, sending out an illegal behavior warning. The invention further provides a verbal skill quality inspection device and equipment based on artificial intelligence and a storage medium. In addition, the invention further relates to a block chain technology, and accessed data can be stored in a block chain. The method can be applied to a verbal skill quality inspection scene in the financial field, multi-aspect verbal skill violation recognition is performed by utilizing artificial intelligence in combination with multiple models, and the recognition efficiency and accuracy of violation verbal skill in a business scene can be improved.

The invention provides a low-voltage circuit breaker tester and a testing method thereof. The low-voltage circuit breaker tester comprises a collector, a current booster and a handheld tester, the collector is connected with a circuit breaker and is used for collecting current data of the circuit breaker; the current rising source is connected with the circuit breaker and is used for loading a test current to the circuit breaker; the handheld tester is connected with the collector and the current rising source through a wireless network, and is used for selecting a brand of a circuit breaker needing to be tested, switching to a corresponding communication protocol according to the selected brand, collecting equipment information of the circuit breaker through the collector based on the communication protocol, and sending the equipment information to the handheld tester. And the controller is used for controlling the current rising source to load a test current to the circuit breaker according to the equipment information, controlling the collector to collect current data of the circuit breaker based on the communication protocol, and detecting whether the function of the circuit breaker is normal or not according to the current data. According to the application, the problem that different brands of circuit breakers are incompatible in the test and detection process on site is effectively solved.

The invention relates to a bi-crosslinking cyanate ester-epoxy blended adhesive and a preparation method thereof, and relates to the technical field of high polymer materials, the adhesive comprises the following components in parts by weight: 45-85 parts of cyanate ester resin, 5-35 parts of epoxy resin, 0-20 parts of a reactive diluent, 2-6 parts of a bi-crosslinking curing agent and 0-50 parts of a functional filler, the bi-crosslinking curing agent has the following structure: R is alkyl, aliphatic amine or aryl; r'is a primary amino group and / or a secondary amino group, R ''is-C = N and / or-OCN, m is an integer from 1 to 3, and n is an integer from 1 to 2. By adding the double-crosslinking curing agent containing the amino group and the cyano group, the technical problems of high curing temperature, large stress after curing, poor temperature resistance of epoxy resin and the like of the existing cyanate ester resin system are solved, and the curing temperature, the bonding strength and the temperature resistance of the adhesive are balanced. The adhesive can be cured at the temperature lower than 90 DEG C, and has high glass transition temperature, low thermal weight loss and excellent adhesive property.

The invention discloses a distribution network automation feeder terminal switching method, system and device with a fault self-diagnosis function and a medium. The method comprises the steps that an original electrical signal is collected through an input interface unit; intermediate information data are obtained through the signal processing module; electrical characteristics are collected through a main control module to obtain an interface type identification result, adaptive adjustment is carried out on the intermediate information data, and an adaptive signal is obtained and output; and acquiring and analyzing the digital signal to obtain device operation state information, performing fault diagnosis in combination with the interface type identification result, and triggering an alarm when abnormality is diagnosed. Intelligent conversion is achieved by integrating multiple interfaces, the problem that equipment interfaces of multiple manufacturers are incompatible is solved, the tedious operation of equipping multiple adapters on site is avoided, the accuracy and stability of cross-interface signal transmission are guaranteed, and the operation reliability, operation and maintenance convenience and system overall safety of the device in a complex environment are improved.

This invention relates to a differential modulator based on a double-layer lithium niobate waveguide and its fabrication method, belonging to the field of optical communication technology. It includes an optical structure and an electrical structure; the optical structure includes a beam splitter, a first lithium niobate modulation waveguide, a second lithium niobate modulation waveguide, and a beam combiner; wherein the output end of the beam splitter is connected to the input ends of the two lithium niobate modulation waveguides, and the input end of the beam combiner is connected to the output ends of the two lithium niobate modulation waveguides; the crystal axes Z-directions of the first and second lithium niobate modulation waveguides are opposite; the electrical structure includes GSSG differential electrodes and on-chip terminating resistors; wherein the differential electrodes are sequentially arranged with a first ground electrode, a first signal electrode, a second signal electrode, and a second ground electrode; both the first and second lithium niobate modulation waveguides are disposed between the first and second signal electrodes. This invention improves modulation efficiency and enhances device stability and modulation bandwidth.

This application relates to the field of data conversion and communication technology. Specifically, an embodiment discloses a data conversion and communication device for a tobacco shredder, comprising: a programmable logic controller (PLC), an Ethernet expansion module, a wireless access point (AP) module, a mounting rail, and a backplate. The Ethernet expansion module and the wireless AP module are electrically connected to the PLC. The PLC, Ethernet expansion module, and wireless AP module are mounted on the mounting rail via connectors. The mounting rail is mounted on the backplate. The Ethernet expansion module has a first communication interface and a second communication interface, which are respectively connected to the shredder and a host computer via communication cables. This addresses the problem in the prior art where different cigarette factories may use different brands of main controller PLCs in their central control systems in the tobacco processing workshop, leading to incompatibility in communication protocols between the host computer and the lower-level devices.

The invention belongs to the technical field of energy conversion and storage devices, and particularly discloses an all-solid-state optical energy storage integrated device and a preparation method and application thereof. The all-solid-state optical energy storage integrated device sequentially comprises an energy storage electrode, an energy storage all-solid-state electrolyte, a compatible electrode, a photoelectric conversion all-solid-state electrolyte and a dye-sensitized photoanode from bottom to top, wherein the compatible electrode comprises foamed nickel and a carbon-sulfur composite material coated on the foamed nickel, the preparation raw materials of the energy storage all-solid-state electrolyte comprise polyoxyethylene, lithium bis (trifluoromethanesulfonimide) and beta-cyclodextrin, and the preparation raw materials of the photoelectric conversion all-solid-state electrolyte comprise polyoxyethylene, elemental iodine, lithium iodide and beta-cyclodextrin. And the energy storage electrode is a lithium metal anode. The photoelectric conversion unit and the energy storage unit are integrated in one device, efficient light energy conversion and electric energy storage are achieved, and good energy conversion efficiency and cycling stability are achieved.

The present application relates to the field of software testing, and discloses a method, system, computer-readable medium, and electronic device for generating a test case script. The method includes: obtaining a Rest API definition document, parsing the Rest API definition document, and obtaining element and parameter format information; outputting a graphic flow visualization editing page; displaying the target component according to the target component selected from the components of the graphic flow visualization editing page, and obtaining parameter data corresponding to each target component; drawing a graphic flow in the graphic flow visualization editing page according to the received interactive instructions; obtaining the graphic flow data corresponding to the graphic flow, and using the parameter data and the graphic flow data as the graphic flow editing data; converting the graphic flow editing data into a unified use case description information; converting the unified use case description information into a test case script. This method lowers the learning threshold for software testing, improves the efficiency of software evaluation, and solves the script incompatibility problem of different test engine environments.

The invention provides a multi-channel composite connection monitoring pipeline structure integrated with NO infusion. The multi-channel composite connection monitoring pipeline structure comprises an infusion catheter, an oxygen input connector, a rotary conversion connector, an NO injection tee joint, a gas sampling tee joint, an oxygen flow sensor and a mixed gas flow sensor. NO is injected into the infusion catheter through the NO injection tee joint and is mixed with oxygen in the infusion catheter, the gas sampling tee joint is located on the downstream of the first connecting pipe of the infusion catheter to obtain stable mixed gas for real-time concentration monitoring, and the two flow sensors are used for monitoring the oxygen and the gas flow after the NO and the oxygen are mixed in real time respectively. The rotary adapter is quickly compatible with a nasal catheter, a mask and an extracorporeal circulation related interface, so that cross-scene seamless connection of intraoperative and postoperative NO treatment is realized. According to the invention, the frequency of pipeline replacement is reduced, the risks of gas leakage, misconnection and pollution are reduced, the stability and controllability of oxygen and NO gas delivery are improved, and the safety and effectiveness of NO infusion are improved.

The present invention discloses an IPv6 terminal identity authentication method using 5GNR physical layer information, which belongs to the field of wireless communication security. First, a mobile security communication system model with eavesdroppers is constructed; then the two legal communication parties send detection signals to each other to estimate the communication channel, and then decorrelate the channel estimation matrix; the two legal communication parties respectively jointly quantize the phase and amplitude of the channel estimation matrix after decorrelation processing; the two legal communication parties generate consistent keys through a privacy coordination method based on BCH error correction code; the two legal communication parties respectively perform hash sequence transformation on the consistent keys obtained by each other to obtain the final key; the legal sender generates an identity authentication tag through hash transformation based on the generated key and the source information to be transmitted, and sends it together with the source information; the legal receiver generates an identity authentication tag after hash transformation based on the received source information and the generated key, and compares it with the received identity authentication tag to complete the authentication process. The present invention effectively resists active attacks, does not have the problem of incompatibility with the underlying network, and solves the security leakage risk brought by key distribution management, thereby enhancing the security of the system.

This invention discloses a high-voltage LDMOS device, wherein a first field plate dielectric layer is provided on a first-doped substrate / first-doped epitaxial layer, and only in the second-doped LDMOS device region, the first field plate dielectric layer being a partial LOCOS structure; a first and second-doped drift region is provided below the first field plate dielectric layer in the first-doped substrate / first-doped epitaxial layer; a second and second-doped drift region is provided below the first and second-doped drift regions in the first-doped substrate / first-doped epitaxial layer; a second field plate dielectric layer is provided on the side of the first field plate dielectric layer near the channel, the second field plate dielectric layer being constructed by filling the dielectric layer using a shallow trench isolation process; the device drain is connected to the first and second-doped drift regions and the second and second-doped drift region and the second-doped heavily doped region through a second-doped well implantation. This invention reduces specific on-resistance while ensuring high breakdown voltage, improving process compatibility and device performance.

The invention relates to the field of digital twinning, in particular to an engine system of a digital twinning city based on a multi-capability component. Comprising a capability calling terminal and a plurality of capability component response terminals, each capability component response terminal comprises a plurality of capability components, and the capability calling terminal calls an API (Application Program Interface) of the corresponding capability component according to a construction request of a digital twinning scene so as to generate a corresponding digital twinning application; the capability calling terminal operates according to the following method: generating a response matching degree corresponding to each substructure capability request class by each capability component response terminal; and determining a target capability response terminal according to the response matching degree. According to the method and the device, the capability components of different capability response terminals can be flexibly called according to the construction request of the actual digital twinning scene in an API (Application Program Interface) calling mode. Meanwhile, the capability components in the same capability response terminal can be used as much as possible, the problem of data format difference can be avoided as much as possible, and then compatibility is improved.

The present invention relates to a GOS substrate, a short-wave infrared focal plane pixel and a preparation method thereof. A GOS substrate comprises SiN x layer, doped polysilicon layer, sapphire substrate, dielectric stack layer, selective epitaxial growth germanium layer, wherein x≠0. The preparation method comprises: forming a first dielectric layer on a silicon substrate; forming a plurality of grooves on the first dielectric layer; after forming the plurality of grooves, sequentially forming a low-temperature germanium layer and a high-temperature germanium layer on the first dielectric layer until the grooves are covered to a certain thickness; forming a second dielectric layer to obtain a sacrificial substrate; forming a doped polysilicon layer, SiN on the front side of the sapphire substrate; x The invention solves the problems of large lattice mismatch and high thermal mismatch in epitaxial growth of III-V materials, improves device responsiveness and reduces dark current.

The invention discloses a remote controller, a remote controller updating system and a remote controller updating method, and belongs to the technical field of electronic equipment. The remote controller comprises a power supply, an MCU control module, function keys and an infrared emission module. The power supply, the infrared emission module and the function keys are electrically connected with the MCU control module. The function keys comprise a special key and a multiplex key, the special key comprises a first key and a second key, the first key is only used for controlling the set top box, the second key is only used for controlling the television, and the multiplex key is a key shared by the set top box and the television; the device further comprises a first communication module and a dial switch. The first communication module and the dial switch are electrically connected with the MCU control module. And the MCU control module is connected with the multiplexing key, and the control of the multiplexing key on the set top box / television is switched by dialing the dial switch. Remote control switching of the set top box and the television can be achieved through the dial switch, and operation is simpler.

The cross-protocol interaction method comprises the steps that if a target DNS request used for analyzing a target domain name into a first IP address based on a first network protocol is intercepted in a kernel mode of a Windows host, a target application program managing and controlling the target DNS request sends a first data packet originally sent to a target server side of the first IP address to a target server side of the first IP address, redirecting to a target port of a local IP address based on a second network protocol in the Windows host; adding a target flow identification head at least comprising the target domain name to a first data packet received by the target port to form a target data packet; the cloud protocol conversion module extracts a target domain name and a first data packet from the target data packet; obtaining a first IP address of the target domain name based on a first network protocol through DNS analysis; and based on the first IP address, converting the first data packet into a second data packet capable of accessing a target server side corresponding to the first IP address so as to access the target server side.

This utility model provides a shelf support, comprising: a support body including a base and a side plate perpendicularly disposed to the base, the side plate having a first elongated hole extending vertically and a first tooth pattern on the side of the first elongated hole; and a pressure block assembly mounted on the side plate, comprising a pressure block, a connecting rod, and a locking member. The pressure block is vertically adjustable and mounted above the base. One end of the connecting rod is connected to the pressure block, and the other end passes through the first elongated hole and is connected to the locking member. The side of the pressure block facing the side plate has a second tooth pattern that matches the first tooth pattern. When the pressure block moves to the desired position, it is fixed to the side plate by the locking member. The base and adjustable pressure block form a flexible clamping space, solving the problem of incompatibility with fixed-size shelves. In addition, the second tooth pattern of the pressure block cooperates with the first tooth pattern on the side plate, making the pressure block less prone to loosening after locking, greatly enhancing the reliability and safety of clamping.

The invention provides a two-dimensional / three-dimensional perovskite heterojunction subjected to solvent heat treatment, a preparation method and application. After the two-dimensional perovskite passivation layer is prepared on the surface of the three-dimensional lead halide perovskite thin film, solvent heat treatment is carried out through AX / IPA mixed steam, lead halide by-products at a two-dimensional / three-dimensional perovskite heterojunction interface are eliminated, and the number of halide octahedron layers in two-dimensional perovskite is increased. According to the invention, the non-radiation load center on the surface of the film is effectively reduced, the passivation effect of the two-dimensional perovskite is enhanced, and the photoelectric conversion efficiency is improved; moreover, the out-of-plane transmission capability of carriers is enhanced, the conductivity in the vertical direction is improved, the current loss is reduced, and the responsivity and the detection rate of the device are improved. The problem of solvent incompatibility in two-dimensional / three-dimensional perovskite heterojunction prepared by a traditional solution method is solved, effective passivation of surface defects of the perovskite thin film is realized, and powerful technical support is provided for preparation of high-performance stable perovskite thin film photoelectric devices.

The application discloses a data slice transmission system and method based on an SRV6 network, and relates to the technical field of network communication.The system comprises a data slice management module, which is used for transmitting the received data stream after processing between an IB network and an SRV6 network; an IB interface module, which is used for receiving IB data stream sent by the IB network and sending the IB data stream to the data slice management module, and is also used for receiving IB data stream sent by the data slice management module and transmitting the IB data stream to the IB network; and a MAC interface module, which is used for receiving SRV6 data stream sent by the SRV6 network and sending the SRV6 data stream to the data slice management module, and is also used for receiving IB data stream sent by the data slice management module and transmitting the IB data stream to the SRV6 network. The application can realize high-speed transmission of IB original data stream in the SRV6 network, retains the advantages of the IB network, solves the short board that the IB cannot be transmitted for a long distance through the SRV6 network, upgrades the slice function, and provides differentiated services for businesses.

The invention provides a liquid chromatography-mass spectrometry method for teicoplanin component analysis. The method comprises the following steps: firstly, analyzing a sample to be detected by adopting a one-dimensional HPLC (High Performance Liquid Chromatography) method, then, carrying out primary full scanning on a component enrichment sample and an impurity enrichment sample in a positive ion mode by adopting a two-dimensional LC-HRMS (Liquid Chromatography-High Resolution Mass Spectrometry) method, and then, respectively carrying out secondary scanning on each quasi-molecular ion peak, so as to obtain the structure of each compound and an MS2 cracking pathway thereof; a mobile phase of the one-dimensional HPLC comprises a mixed solution of a phosphate solution and acetonitrile, and a mobile phase of the two-dimensional LC-HRMS comprises a formic acid aqueous solution and acetonitrile. According to the method disclosed by the invention, the compatibility of chromatographic conditions and a liquid chromatography instrument is good, the teicoplanin samples of fermentation family compounds from different sources can be compared and analyzed, the peak sequence of components and impurities is defined, the separation of the components and the impurities is realized, and the structural identification is further carried out, so that the consistency of the pharmaceutical basis of the product is evaluated.

The invention belongs to the field of FPGA (field programmable gate array) application design, and provides an RDMA (remote direct memory access) and CXL (common X-ray language) protocol bidirectional high-speed conversion method, which adopts a brand-new FPGA heterogeneous bidirectional protocol conversion idea as a core design idea; mass resources of an FPGA chip are used as an architecture carrier, a function kernel is designed in a pipeline mode, and protocol conversion is executed in a bidirectional concurrent mode. Centralized management is achieved, a plurality of different RDMA and CXL devices are comprehensively coordinated to efficiently complete communication protocol conversion tasks in parallel, and then real-time communication of different devices is achieved.

The application discloses an intelligent recommendation and feedback evolution system and method based on agent skills, and belongs to the technical fields of artificial intelligence, agent execution framework and the like.The application first collects open-source agent skill description files in large scale, completes format verification, meta-information completion and deduplication, and builds a selected skill set;combined with rule extraction and large language model analysis, a structured skill portrait covering environment dependence, quality and verifiability evaluation is generated.For the verifiable skills, verification tasks are reversely constructed, and operation verification is completed relying on a sandbox environment and a real agent.The system adopts a two-stage mode of vector retrieval recall plus agent fine arrangement to realize accurate recommendation, and encapsulates relevant capabilities as general skills to reduce the access threshold of clients.Meanwhile, structured feedback data is collected and stored taking a conversation identifier as a carrier, so as to promote offline iterative optimization of the skill library.

This invention discloses a communication system for connecting a measurement-while-drilling (MWD) instrument to a rotary steerable tool (DSP), comprising: a single bus; multiple connection devices, each connected to the single bus and configured with a corresponding priority identifier; and a communication circuit connected to all connection devices via the single bus. This circuit first sets corresponding identification attribute values ​​for different priority identifiers, and then communicates with the current connection device according to a communication protocol matching the connection device with the first identification attribute value. At any given time, only one identification attribute value among all priority identifiers is set to the first value. This invention solves the problem of incompatibility in communication protocols between different types of instruments and reduces the difficulty of connecting instruments to each other.

The present application relates to the technical field of SAR image processing and self-supervised learning. A SAR image self-supervised pre-training method based on a mask autoencoder. In view of the problem that existing SAR target detection relies on natural image pre-training weights and there is a significant domain gap, resulting in low detection accuracy in a small sample scene, a multi-source SAR pre-training dataset is constructed, an asymmetric encoding and decoding architecture is adopted, ResNet50 is used as a feature extraction encoder to adapt to the local scattering characteristics of SAR, a lightweight convolutional decoder is constructed, a Gamma distribution speckle noise modeling mechanism is introduced, the input image is divided into non-overlapping image blocks and a random mask matrix is generated, the encoder only encodes the visible area, the decoder maps the latent representation back to the image space to complete the reconstruction, and the learning rate scheduling and gradient clipping mechanisms are combined to complete unsupervised pre-training, and the encoder weight is extracted and migrated to a downstream rotating target detection model to complete small sample fine tuning.

The invention discloses a spatio-temporal data dual-mode multi-task general analysis method and a spatio-temporal data dual-mode multi-task general analysis system. The method comprises the following steps: acquiring spatio-temporal data of different modes; converting the spatio-temporal data of different modalities into data sequences of the same format, and generating road network representation vectors according to the spatio-temporal data of different modalities; performing up-sampling on the data sequence and the road network representation vector to obtain a spatio-temporal data feature sequence; and determining a text instruction and a task placeholder, and analyzing the spatio-temporal data by using the spatio-temporal data analysis model in combination with the spatio-temporal data feature sequence. According to the method, the problem of incompatibility between different data modes is effectively solved, and the requirements of different tasks can be flexibly met.

The invention provides a pixel unit, a driving method and an image sensor. The pixel unit comprises a P-type doped region, a photodiode region, a floating diffusion region, a transmission transistor, a reset transistor, a source follower transistor and a row selection transistor, wherein the photodiode region and the floating diffusion region are located in the P-type doped region, and the transmission transistor, the reset transistor, the source follower transistor and the row selection transistor are connected with the floating diffusion region. Wherein a first N-type doped region is formed in the P-type doped region on one side, far away from the floating diffusion region, of the photodiode region, the P-type doped region is arranged between the first N-type doped region and the photodiode region, and the first N-type doped region, the P-type doped region and the photodiode region form a parasitic NPN triode. The parasitic NPN triode is in an amplification state by controlling the potential of the first N-type doped region, the purpose of charging the photodiode region is achieved, the operation of charging the photodiode through exposure is avoided, photoelectric performance testing can be carried out on a conventional WAT testing machine, and the problem that photoelectric testing is not compatible with conventional WAT testing equipment is solved.

The present invention provides a negative electrode sheet and a preparation method thereof, and a lithium battery. The preparation method comprises the following steps: coating a first negative electrode slurry on the outer surface of a current collector to form a first negative electrode layer; sequentially coating a wetting agent and a second negative electrode slurry on the outer surface of the first negative electrode layer away from the current collector to form a second negative electrode layer to obtain a negative electrode sheet; wherein the first negative electrode slurry comprises a first negative electrode material, water and an organic solvent; the second negative electrode slurry comprises a second negative electrode material and water; the first negative electrode material is different from the second negative electrode material. Based on this, the wettability of two completely different negative electrode materials can be greatly improved, further avoiding the incompatibility problem caused by the excessively large contact angle between the materials, so that they are divided into upper and lower layers and completely adhered to the negative electrode current collector, and then the battery can simultaneously take into account a better battery capacity and capacity retention rate at a conventional coating thickness.