923results about How to "Easy to compress" patented technology

The invention discloses a method for performing efficient lossless text compression based on a large language model, which relates to the technical field of text compression and comprises the following steps of: preprocessing to-be-compressed text data to obtain an initial token sequence; selecting and loading a pre-trained big language model, analyzing the current context information by using the big language model, obtaining a probability value of each token, forming a probability distribution list, and recording a ranking sequence number of the current token; the context window is moved backwards by one token, and context information is updated until all the tokens are processed; and recording the ranking sequence numbers of all the tokens in sequence to form a sequence number list so as to obtain a final text compression result. According to the method, the compression rate is remarkably increased, the requirements for storage space and transmission bandwidth are reduced, the high processing speed is kept, and the method is suitable for real-time compression and decompression of large-scale text data.

The invention discloses a high-compression-ratio image compression method based on optimal transmission mapping, which is suitable for application scenes such as network transmission, image storage and image transmission, and can remarkably improve the image transmission efficiency and save network bandwidth and storage resources. Compression can be carried out based on generative adversarial learning or a diffusion model, and the generative adversarial learning is utilized by the generative adversarial learning to train an image compression model based on optimal transmission mapping. The model comprises a feature extraction layer, a mapping layer, a quantization coding layer and a decoding reconstruction layer. The mapping layer realizes mapping and optimization of image features through optimal transmission mapping based on convex mapping; an image compression model of the latter comprises a feature extraction layer, a mapping layer, a quantization coding layer and a decoding reconstruction layer, the feature extraction layer is responsible for coding the preprocessed image into low-dimensional feature representation, quantized features are restored into image features through a denoising network of a diffusion model, and the decoding reconstruction layer is responsible for decoding the image. And decoding the image into a high-quality compressed image close to the original image.

The invention relates to the technical field of data storage, and discloses a lossless compression algorithm-based data storage method, which comprises the following steps of: receiving to-be-stored data through a data interface, automatically identifying a data format by using a data analysis tool, and performing feature analysis to obtain the size, the type and the complexity of the data; through deep analysis of data features, the method can flexibly select a proper Huffman coding processing mode, and optimizes a compression process according to different data types and complexity. In addition, a context modeling optimization mechanism is introduced, the coding mode is dynamically adjusted, and the compression ratio and the storage efficiency are further improved; efficient storage and reliability verification of data are ensured through a block storage strategy in combination with metadata management; the problem that an existing compression algorithm is low in efficiency is solved, the integrity and reliability of data storage are improved, and the method is suitable for storage requirements of large-scale data and diversified data.

The invention provides a swing vibrator type piezoelectric micropump and a driving and manufacturing method thereof. The piezoelectric micropump comprises a supporting structure, a first through-flow layer, a second through-flow layer and an actuator, wherein the first through-flow layer and the second through-flow layer are arranged at the two ends of the supporting structure, and the actuator is arranged in the supporting structure. The actuator comprises two actuating units which are arranged in parallel. The actuation unit includes a substrate and a vibration element. The vibration element is fixed on the substrate; the two actuating units are of the parallel and opposite cantilever structures on the opposite sides, center stress similar to that of a conventional annular actuator structure cannot be generated in the swing gas pumping process of the two actuating units, and the service life of the piezoelectric micropump can be prolonged. Meanwhile, when different excitation signals are input into the two actuating units, the two actuating units can generate asynchronous vibration, so that reverse airflow with certain continuity is generated in the piezoelectric micropump, the effect of regularly self-cleaning the air inlet is achieved, and long-time continuous work of the piezoelectric micropump in a complex environment is achieved.

The present invention discloses an ultrasonic-assisted annular laser coaxial wire feeding welding device and a welding method, and belongs to the field of welding technology. A clamping mechanism is arranged above the support frame of the ultrasonic-assisted annular laser coaxial wire feeding welding device, a vibration mechanism is arranged on the support frame, a welding mechanism is arranged above the support frame, the welding mechanism is connected to a mechanical arm, and an ultrasonic mechanism is arranged on the welding mechanism. A connecting pipe is arranged at the center of the welding mechanism fixed seat, a wire feeding tube is arranged inside the connecting pipe, a plurality of lasers are evenly arranged on the fixed seat, a light inlet channel for the laser to pass through the fixed seat is arranged inside the fixed seat, the circle where the laser is located is coaxial with the wire feeding tube, a nozzle is arranged below the fixed seat, and a cavity for the wire feeding tube and the laser to pass through the nozzle is arranged inside the nozzle. The ultrasonic-assisted annular laser coaxial wire feeding welding device and the welding method described in the present invention can solve the problems of poor adaptability and poor ultrasonic treatment effect of the existing welding device.

The invention relates to the technical field of sodium ion battery positive electrode materials, in particular to a carbon-coated sodium ferric phosphate pyrophosphate positive electrode material and a preparation method and application thereof.The preparation method includes the steps that carbon nanotubes and an organic carbon source serve as carbon sources to prepare two kinds of sodium ferric phosphate pyrophosphate particles, and the two kinds of particles are mixed in proportion and then sintered to obtain the carbon-coated sodium ferric phosphate pyrophosphate positive electrode material. In the carbon layer coated on the surface of the material, the carbon nanotubes and the organic carbon source exert respective conductive advantages to form a strong conductive network, so that the conductivity of the material is improved, and the overall structural rigidity of the material is enhanced.

The invention relates to a power load high-frequency data compression and acquisition method based on edge adaptive mode matching, and the method comprises the steps: dividing load data into non-stationary segment data and stationary segment data based on different characteristics of contained information data; compressing the non-stationary segment data by adopting a method based on edge adaptive mode matching; compressing the stationary segment data in a differential coding mode; and reconstructing the compressed non-stationary segment data and the compressed stationary segment data, and splicing reconstruction results. The power load high-frequency data compression and acquisition method based on edge adaptive mode matching is provided by combining event detection and mode matching compression theories, key information is reserved as far as possible, data compression is performed, the transmission communication bandwidth is reduced, the communication pressure is relieved, and a good compression effect is obtained.

The invention provides a time sequence data compression-based database monitoring operation and maintenance method and system, which realize real-time monitoring of various index data of a database platform through an efficient data acquisition and compression technology. The system can efficiently collect various performance data generated in the operation process of the database, optimizes time series data through a compression algorithm, and reduces redundant storage of the data. In a data storage and management process, a primary differential sequence and a secondary differential sequence are calculated, so that the stored data volume is reduced; according to the method, a trend in an original data sequence is removed by using difference, so that a subsequent difference sequence is easier to compress, and meanwhile, for non-constant difference, by setting a dynamic threshold value and only recording a difference value greater than the threshold value, small changes are ignored and the compression ratio is improved on the premise of ensuring that important data information is not lost. And on the other hand, the regularity of the differential sequence is judged through Srelative, and a compression strategy can be selectively applied, so that proper compression methods can be specifically applied to time sequence data with different characteristics, and the processing efficiency is improved. Through the design, the storage and processing efficiency of the compressed data is improved, the system can decompress and analyze the data more quickly, and the running state of the database is monitored in real time.

The invention provides a flexible nano thermal insulation material and a preparation method and application thereof, and the preparation method of the flexible nano thermal insulation material comprises the following steps: mixing low-heat-conductivity-coefficient powder, a fibrosis adhesive and an optional additive, carrying out ball milling to obtain floccule, and rolling the floccule into a film-shaped flexible nano thermal insulation material. According to the invention, the low-thermal-conductivity powder is cross-linked, fixed and rolled to form the flexible film by using the fibril formed by the fibrillating adhesive, so that the pore structure of the low-thermal-conductivity powder is maintained without introducing the adhesive with high thermal conductivity for forming; therefore, the low heat conductivity coefficient of the powder is kept, and meanwhile, the powder has good processing formability. The prepared flexible nano heat insulation material has excellent flexibility, heat insulation performance and certain tensile and compression performance, and can be widely applied to the fields of aerospace, constructional engineering, shipbuilding, automobile manufacturing and the like.

The invention relates to the technical field of armoring machines, and provides a cable copper strip armoring machine which is used for winding a copper strip on a moving core wire to form an armoring wire, a first sleeve is provided with a first hole channel, two ends of the first hole channel are respectively a bare wire inlet and an armoring wire outlet, and the core wire enters the first hole channel through the bare wire inlet and enters the armoring wire outlet through the armoring wire outlet. The armored wire moves out of the first hole channel through the armored wire outlet, the first sleeve is further provided with a first belt inlet, and a copper belt enters the first hole channel through the first belt inlet. The first compression roller is rotationally arranged on the first sleeve and is in rolling butt joint with the surface of the armored wire; the two second pressing rollers are rotationally arranged in the first belt inlet and abut against the surface of the armored wire in a rolling mode. According to the technical scheme, the problems of winding path deviation, winding clearance, loosening after winding, insufficient compactness and the like in the copper strip armoring process caused by deformation of a certain degree due to the fact that the cable and the copper strip are possibly subjected to various external forces in the production, transportation and installation processes in the prior art are solved.

The invention relates to the technical field of data processing, in particular to a data compression and block storage processing method based on deep learning. The method comprises the following steps: acquiring integrated data to be compressed; analyzing the effective to-be-compressed integrated analysis data according to the to-be-compressed integrated data; constructing a heterogeneous data feature analysis tree model; extracting to-be-compressed feature data of the effective to-be-compressed integrated data through the heterogeneous data feature analysis tree model; designing a recursive sparse coefficient evaluation objective function based on the to-be-compressed feature data; performing adaptive sparse compression processing on the effective to-be-compressed integrated data based on the recursive compression sparse coefficient evaluation objective function to obtain compressed data; performing block processing on the compressed data to generate block compressed data; and performing compressed data block storage optimization processing on the partitioned compressed data to generate an optimized storage compressed data block. According to the method, data features are analyzed through a deep learning algorithm, so that efficient processing of data compression and block storage is realized.

The utility model relates to the technical field of pipeline and pipe fitting machining, in particular to a cutting device convenient to position and used for pipeline and pipe fitting machining, which comprises an operation table, upper pressing mechanisms arranged on two sides of the top of the operation table, a cutting mechanism arranged between the two groups of upper pressing mechanisms, and a limiting mechanism arranged on one of the upper pressing mechanisms. A one-way guide supporting mechanism capable of conveying towards the limiting mechanism side is arranged below the two sets of upper pressing mechanisms in a penetrating mode, a displacement measuring sensor is arranged below the limiting mechanism, the two sets of upper pressing mechanisms are both electrically connected with the displacement measuring sensor, and the cutting device is high in cutting stability and cutting precision.

The invention discloses building aluminum formwork welding equipment which comprises a lifting frame, a pressing and correcting mechanism is arranged at the top of the lifting frame, a left and right station switching mechanism located above the pressing and correcting mechanism is arranged on the lifting frame, and a telescopic welding part is rotationally and slidably connected to the left and right station switching mechanism. The left and right station switching mechanism is used for controlling the telescopic welding part to be switched on the left side and the right side of the pressing and correcting mechanism, and a control combination used for controlling the telescopic welding part to transversely slide is arranged at the top of the lifting frame. According to the device, the pressing and correcting mechanism is arranged, so that the ribbed tube freely placed in the aluminum template is conveniently pressed after being corrected, manual righting or clamp pressing control is not needed, the problem of displacement deformation cannot occur during welding after the ribbed tube is pressed, the welding efficiency is improved, and meanwhile, the problem of deformation of the whole aluminum template can be effectively avoided.

The invention belongs to the technical field of gas pipe networks, and particularly relates to a performance test system and method based on an urban gas pipe network connecting piece and key equipment sealing material in a hydrogen-doped environment. The system comprises a hydrogen cylinder, a natural gas cylinder, a gas mixing tank, a compressor, a horizontal stainless steel tank, an electric tracing band, a pressing sheet clamping device, a prestress loading measuring device, a hanging sheet clamping device, a pressure transmitter, a thermocouple temperature transmitter, a computer, a nitrogen cylinder, a flame arrester and a hydrogen concentration detector. The hydrogen cylinder and the natural gas cylinder are respectively communicated with the gas mixing tank, an outlet of the gas mixing tank is communicated with the horizontal stainless steel tank after passing through the compressor, and the nitrogen tank is respectively communicated with the horizontal stainless steel tank, the hydrogen cylinder and the natural gas cylinder; an electric tracing band, a pressing sheet clamping device, a prestress loading measuring device, a hanging sheet clamping device, a pressure transmitter and a thermocouple temperature transmitter are arranged in the horizontal stainless steel tank. The system achieves the purpose of constant temperature control.

The invention provides a communication method and system for time-delay-free ultra-high-definition image transmission IP core software, and relates to the technical field of image communication, and the method comprises the steps: analyzing the image content, and recognizing a static scene and a dynamic scene; performing scene complexity evaluation, and performing coding parameter adaptive analysis to obtain a coding strategy; a display device connected with the IP core software and used for identifying display parameters; performing mode matching adjustment, and determining an adjustment coding strategy; and according to the adjustment coding strategy, transmission network bandwidth is optimally allocated with no transmission delay as a target, a transmission channel is established, the transmission channel comprises a transmission forcing timestamp, and the transmission forcing timestamp is used for controlling a data transmission time sequence and a transmission time node. The technical problem that the real-time performance and efficiency of ultra-high-definition image transmission are poor due to the fact that the prior art lacks effective bandwidth management and parameter optimization strategies for dynamic image content and is difficult to meet the requirement of non-delay transmission in different scenes is solved.

The invention relates to the technical field of pouring sealants, in particular to a pouring sealant and a preparation method and application thereof, and the pouring sealant comprises epoxy resin, a curing agent and filler; the filler comprises a first filler, a second filler and a third filler; the first filler comprises quartz and / or silica powder; the second filler comprises a flame-retardant filler; the third filler comprises fumed silica. The pouring sealant has excellent high-temperature resistance, compression performance and flame retardance after being cured, is low in flowability, can meet the application requirements of the pouring sealant for mounting the inserts for the airplane, and is particularly suitable for pouring when the inserts of the airplane are mounted at the curing temperature of 120-180 DEG C; moreover, the pouring sealant provided by the invention belongs to a single-component pouring sealant, does not need to be prepared on site when being used, and is simple to operate and convenient to use.

The invention relates to a content video-based hypercompression storage method. The method comprises the following steps of S1, acquiring video stream data of a camera through a network; s2, for the video stream data, performing corresponding decoding according to the code stream type to generate YUV data; s3, analyzing the YUV data, determining an ROI (Region of Interest), and extracting content feature values of a plurality of moving targets and position data of images where the moving targets are located as element data of the video; the ROI is logically separated from the non-ROI, secondary high-fidelity compression is carried out on the ROI, high compression is carried out on the non-ROI, and the high compression rate of the ROI under the high-fidelity condition is achieved; s4, combining the code streams of the ROI and the non-ROI into the same frame of code stream; s5, taking the ROI metadata of each region of interest as structured description data of the frame data; and S6, sending the coded code stream and the ROI metadata to a video storage engine for intelligent video storage.

The invention relates to the field of machine learning, in particular to a knowledge distillation method based on teacher model output reconstruction, which comprises the following steps of: preprocessing a data set to obtain a preprocessed data set capable of being directly input into a teacher model, inputting the teacher model and a student model, respectively obtaining classification results corresponding to the teacher model and the student model and outputting logit, and calculating the output logit of the teacher model and the student model; obtaining the probability distribution of the output logit after the teacher model is corrected, the probability distribution of the non-target category, and the probability distribution of the output logit of the student model; and performing knowledge distillation based on the probability distribution of the output logit corrected by the teacher model, the probability distribution of the non-target category and the probability distribution of the output logit of the student model, and training the student model to obtain the required student model. According to the method, the output probability distribution of the teacher model can be reconstructed, the knowledge quality is improved, the knowledge type is perfected, the student model learning is more accurate, the model compression performance is optimized, and the generalization ability of the student model is enhanced.

The invention provides a design method of a variable-size variable-density lattice structure wing with optimized heat dissipation load, and relates to the technical field of aerospace engineering, and the design method comprises the following steps: S10: carrying out variable cross-section design on a D-type unit to obtain a variable cross-section D-type unit, taking the variable cross-section D-type unit as a lattice unit configuration, and filling the wing to form a skin lattice structure; the skin lattice structure of the wing comprises a skin and a lattice filling area; s20, cell element variable-size design is adopted for the dot matrix units, and variable-size dot matrix units are constructed; s30, according to the stress field of the wing, cell element variable-density design is adopted for the variable-size dot matrix units, and variable-size variable-density dot matrix units are constructed; and S40, establishing a wing configuration. The variable-cross-section D-type unit is used as a dot matrix unit configuration, deep coupling of integrated design of heat dissipation and bearing performance is achieved through variable-size and variable-density design, application scenes are flexibly adjusted, and complex working condition requirements are met.

The invention relates to a low-temperature-resistant dry-type transformer and a high-voltage coil manufacturing method, a high-voltage coil comprises a coil inner insulator, an air channel and a coil outer insulator, and multiple layers of electromagnetic wires are wound between the coil inner insulator and the air channel inner insulator and between the air channel outer insulator and the coil outer insulator. An interlayer insulator is arranged between every two adjacent layers of electromagnetic wires, end insulators are arranged at the two ends of the high-voltage coil, the electromagnetic wires are fixed by pouring low-temperature-resistant epoxy resin, and each of the coil inner insulator and the coil outer insulator comprises multiple layers of round-edge gridding cloth. The end insulation comprises end insulation gridding cloth and a first glass fiber continuous felt wrapping the end insulation gridding cloth from the outer side, the interlayer insulation comprises multiple layers of interlayer gridding cloth, a second glass fiber continuous felt is arranged between every two adjacent air channels, and a coil panel is arranged on the front side of the high-voltage coil. And panel filling gridding cloth is arranged between the coil panel and the outer diameter surface of the coil. The device can adapt to low-temperature and severe-cold environmental conditions, and heat preservation cotton and a heating device do not need to be additionally arranged.

The embodiment of the invention provides a training method of an image compression model and an image compression method and device.The training method of the image compression model comprises the steps that a sample image is obtained, the sample image is divided to obtain region information, and the region information is used for indicating at least two regions included in the sample image; inputting the sample image and the regional information into the initial image compression model to obtain a corresponding predicted reconstructed image; according to the predicted reconstructed image and the sample image, the loss functions corresponding to the at least two areas are adopted to determine model reconstruction loss, the initial image compression model is trained according to the model reconstruction loss, a trained target image compression model is obtained, and the loss functions corresponding to the at least two areas are different. A sample image is divided into at least two regions, different loss functions are adopted for different regions to determine model reconstruction loss, and the characteristics of different loss functions are utilized to constrain image reconstruction targets of different regions, so that the compression effect of different regions is relatively good.

The invention provides a channel context-based full-I-frame video compression method, which mainly comprises the following steps of: firstly, converting an input frame # imgabs0 # into a potential feature y through an encoder network, and introducing a hyper-prior model to capture hidden information of potential representation so as to assist in parameter generation of an entropy model; then, the information is converted and expressed as new intermediate information # imgabs1 #. Intermediate information # imgabS2 # is quantized and then enters an arithmetic encoder to obtain a bit stream, a super-prior decoding network reconstructs super-prior information to obtain entropy model estimation parameters, the data passes through a decoding network, the decoding network decodes by using the parameters to obtain reconstructed data, the reconstructed data passes through an image enhancement module, and image data reconstructed under deep learning is output. Experimental results show that the method can effectively improve the compression effect, and original information is reserved as far as possible after the image is compressed.

The utility model discloses a hot riveting welding device for auto spare part processing, which comprises a top plate and a base, the top plate is fixedly arranged on the base through a first upright post, a bearing plate is fixedly arranged above the base, a movable plate is arranged above the bearing plate, a welding mechanism matched with the bearing plate is arranged on the movable plate, and the welding mechanism is arranged on the base. A welding gun of the welding mechanism is arranged in a sliding groove of a movable plate in a sliding mode through a sliding block, and a third lead screw used for driving the sliding block is arranged on the movable plate. And the movable plate is arranged between the bearing plate and the top plate in a manner of moving up and down, and is driven by a first lead screw and a second lead screw. The hot riveting welding device for machining the automobile parts is ingenious in design and practical in function, and effectively solves the problems that when an automobile filter screen is subjected to hot riveting, manual operation is usually adopted, the machining process depends on artificial experience, quality is unstable, and machining efficiency is low.

The invention discloses a cutting device for metal door and window frame production in the technical field of machine tool metal cutting machining. The cutting device comprises a first pushing assembly, a pushing assembly, a first pressing piece assembly, a cutting assembly, a second pushing assembly and a second pressing piece assembly. The first pushing assembly drives the first pressing assembly to ascend and descend. The first casting die assembly comprises a driving module and an adjustable first casting die module; the second pushing assembly drives the second pressing assembly to ascend and descend. The second pressing assembly comprises a driving module and an adjustable second pressing module. According to the door frame aluminum profile cutting device, door frame aluminum profile feeding, positioning, pressing and cutting operation can be automatically conducted, the door frame aluminum profile cutting device can be suitable for door frame aluminum profiles of different sizes and styles, structural improvement is conducted on the special-shaped faces of the door frame aluminum profiles, door frame aluminum profile positioning and pressing operation can be better conducted, and the production efficiency is improved. And the situation of bending caused by vibration and uneven stress of the special-shaped surface during cutting is effectively avoided, and the cutting effect is improved.

The invention provides a cellulose composite carbon aerogel and a preparation method thereof, and the cellulose composite carbon aerogel is prepared by taking cellulose nanofibers and carbon nanotubes as raw materials, mixing and dispersing the raw materials through dispersoid, and then preparing cellulose nanofiber / carbon nanotube composite carbon aerogel through bidirectional freezing, freeze drying and high-temperature carbonization. The invention also provides an application of the cellulose composite carbon aerogel in the aspect of a battery electrode, and the cellulose composite carbon aerogel has an ultra-large specific surface area and an excellent compression ratio under ultra-low density, and shows super-hydrophilicity, high electrochemical activity, good compression resilience, good structural stability and certain mechanical strength; and the method can be used for various electrochemistry-based water-based flow batteries. The invention solves the technical problem that the existing cellulose carbon aerogel is poor in compressibility and mechanical strength, and belongs to the technical field of batteries.

The invention discloses a precise turning and milling combined machining device for thin-walled parts, and relates to the technical field of thin-walled part machining, the precise turning and milling combined machining device comprises a support, the side face of the support is fixedly connected with a side plate, the top face of the support is fixedly connected with a table top, and the top face of the table top is fixedly connected with a strip-shaped sliding rail; and an adsorption clamping mechanism is slidably connected to the front side of the top end of the strip-shaped sliding rail, an angle adjusting machining mechanism is arranged on the top face of the rear side of the table top, a collecting mechanism is arranged on the bottom face of the table top, a hydraulic rod is arranged on the side face of the collecting mechanism, and the adsorption clamping mechanism comprises a clamping base. According to the clamping device, the two clamping sliding blocks get close to each other through the sliding groove hinge plate under the action of the groove pushing rod to achieve automatic clamping, in the clamping process of the clamping plate, the suction piston is contracted to enable the suction cup to fix the thin-wall part to achieve the adsorption and fixing effect, and the situation that the machining effect is affected due to deformation caused by excessive pressing of the thin-wall part is avoided.

The utility model discloses a protective device for a joint of a gas pipeline. Comprising a pipe sleeve, an upper fixing screw sleeve spirally connected to the upper portion of the pipe sleeve, a lower fixing screw sleeve spirally connected to the lower portion of the pipe sleeve, a connecting plate attached to the inner side of the opening side of the pipe sleeve, a connecting mechanism arranged between the pipe sleeve and the connecting plate, and a protection mechanism fixedly connected to the inner wall of the connecting plate. In the protective device for the gas pipeline joint, the pipe sleeve is coated with epoxy resin and cyclohexanone, and the waterproof surface layer and the flame-retardant surface layer are arranged, so that the service life of the protective device is prolonged, and the protective device has higher contractility, creep resistance, aging resistance, impact resistance, heat resistance and the like, and has good chemical corrosion resistance, water soaking resistance, water vapor permeation resistance and the like; the service life is the same as that of the pipeline.

The invention discloses a fingerprint-imitating high-sensitivity flexible sensor capable of identifying directions and a preparation method thereof, and belongs to the technical field of flexible sensors. The capacitive pressure sensor array and the CPU connected with the capacitive pressure sensor array are used for detecting the magnitude and direction of the acting force between the pre-recognition material and the fingerprint bionic texture, and the periodic surface texture information of the pre-recognition material is detected. According to the capacitive pressure sensor, the strip-shaped air gaps are formed in the dielectric layer, so that the insulativity of the capacitive pressure sensor can be improved, and the capacitive pressure sensor can recognize the direction more accurately. Meanwhile, the strip-shaped air gap can significantly enhance the deformation and pressure response of the sensor, thereby improving the sensitivity of the sensor, preventing the material from being broken, and prolonging the service life. The fingerprint bionic texture has a ridge line structure, and each fingerprint is equivalent to an amplification lever, so that the sensitivity of the sensor is further enhanced. According to the method, a new research direction is provided for restoring the perception ability of the handicapped and researching the humanoid tactile receptor applied to the humanoid robot.

The invention belongs to the technical field of printed circuit board pressing, and particularly relates to a pressing assembly for printed circuit board processing, which comprises a workbench, a first sliding rod is fixedly connected to the middle of the rear side of the upper end surface of the workbench, a first fixing ring is slidably connected to the first sliding rod, and a plurality of pressing rods are slidably connected to the first fixing ring. The workbench is provided with a telescopic stacking mechanism used for placing a plurality of circuit boards. By means of the telescopic stacking mechanism, the circuit board pressed by the pressing rod can be transferred to the supporting block to be placed after dispensing of the circuit board is completed, the process that workers take down the circuit board frequently and manually is omitted, labor is saved, and the subsequent circuit board can be pressed conveniently.