195results about How to "Overcome space" patented technology

The invention relates to a method for identifying sound scenes based on a CNN (convolutional neural network) and random forest classification. The method comprises the following steps of generating Mel energy spectrum and a segment sample set of the sound scene through a Mel filter; utilizing the segment sample set to perform two-phase training on the CNN, and cutting off the feature output of a whole connecting layer, so as to obtain the CNN features of the segment sample set; finally, utilizing a random forest to classify the CNN features of the segment sample set, so as to obtain a final identifying result. Proofed by related experiment results, the method has the advantage that the identification rate on an IEEE DCASE2016 sound scene evaluation data set is better than the identification rate of an MFCC-GMM (Mel frequency cepstrum coefficient-gaussian mixed model) method, and is also better than the identification rate of the existing related identifying methods.

The invention discloses a train real-time monitoring system based on a B / S architecture. The train real-time monitoring system comprises a three-layer mode architecture based on the B / S architecture, and the three-layer mode architecture comprises an uppermost man-machine interaction layer, a middle data processing layer and a lowermost data interface layer. The train real-time monitoring system has the advantages of adaptability and extendibility of the B / S architecture, convenient maintenance and low total cost; the train real-time monitoring system also has real-time communication capacity of an application system under a C / S architecture, operates on the internet, overcomes space and regional limits and can have access to the system through a browser anywhere, a train can be monitored in time whenever and wherever possible, a communication method is simple, network resources are saved, network distribution is convenient to achieve, and the train real-time monitoring system is convenient to use and has good application prospects.

The invention discloses a debugger and a debugging method thereof. The debugging method comprises the following steps: after the debugging relation is established, a debugged task runs in a kernel mode or a user mode by means of the debugger; when the debugger receives a stop instruction sent by a top level or runs into an abnormal event during the debugging process of the debugged task or captures a concerned signal message during the debugging process of the debugged task in the user mode, the debugged task stops running, and a stop mark bit is set in the debugged task; and after the debugged task stops running, the debugger accesses the memory information and / or register information of the debugged task. By adopting the debugging method, the running status of the debugged task in user address space and kernel address space can be tracked and debugged.

The invention discloses a user similarity-based business behavior prediction method under a ubiquitous network. The objective of the invention is to realize effective mining and prediction of user behavior rules under a wireless ubiquitous environment. The method of the invention includes the followings steps that: an interest-based user behavior mining algorithm is researched, so that complete construction and cluster formation of user basic clusters can be realized; behavior rules of the user clusters are researched, and the behavior rules of the user clusters are combined so as to form behavior rules of user individuals; and a variable order Markov chain-based prediction model is researched, and complete mathematical descriptions of a whole theory model are constructed, and the solving of the model can be realized. With the user similarity-based business behavior prediction method under the ubiquitous network adopted, business states of user behaviors can be accurately predicted, and decision references can be provided for personalized customization of businesses, recommendation of optimal businesses and planning and construction of future networks, and the like.

The invention discloses an application software management system and an application software management method for a mobile terminal, and relates to the field of mobile terminals. According to the system, a terminal detection unit is suitable for detecting the mobile terminal connected with the system; a classification unit is suitable for classifying the application software of the mobile terminal, and finding the alternative software of the application software; a frequency counting unit is suitable for periodically counting the use frequency of the application software, and searching for application software of which the use frequency is lower than a preset value according to counting results; a deletion prompting unit is suitable for judging whether the application software of which the use frequency is lower than the preset value has alternative software or not, and prompting a user to delete the application software of which the use frequency is lower than the preset value if the application software of which the use frequency is lower than the preset value has the alternative software; and a clearing unit is suitable for deleting the application software of which the use frequency is lower than the preset value according to a user instruction. According to the application software management system and the application software management method for the mobile terminal, the utilization rate of a storage space of the mobile terminal is increased; and the system and the method have broad application prospect in the field of smart phones.

The invention discloses a wireless charging, alignment and metal foreign body detection system of an electric automobile and a method thereof. The detection system comprises a transmitting coil, a receiving coil, a probe, a signal conditioning module and a control module connected with the signal conditioning module, wherein the transmitting coil is connected with the output end of a wireless charging and transmitting device on the ground surface of a parking lot, the receiving coil is connected with the input end of a wireless electric energy receiving device of an electric automobile chassis and is mutually coupled with the transmitting coil, and the probe is laid on the surface of the transmitting coil and is mutually coupled with the transmitting coil and the receiving coil. The probe is of an axis-symmetric structure and is composed of two coils equal in size and turn number and opposite in winding direction. The probe is consistent with the boundary of the transmitting coil in size. The signal conditioning module is used for receiving voltage signals output by two output ends of the probe and conducting amplification, filtration and peak-holding processing on the two signals output by the two output ends. The control module is used for obtaining the difference of the two received voltage signals and comparing the obtained voltage signal difference value with a preset voltage threshold value.

The invention discloses a physical method based on environment mapping for simulating human skin subsurface scattering. The method comprises steps that, a legendre formula is utilized to project and disintegrate an illumination integration equation in a to-be-simulated scene to acquire a luminance value of each pixel; the luminance value of each pixel is multiplied with an overflow color value to acquire a scattering value of each pixel at a back light face. The physical method based on environment mapping for simulating human skin subsurface scattering solves problems of large data processing workload, large occupation storage space and low processing efficiency existing in the prior art and has advantages of small data processing workload, small occupation storage space and high processing efficiency.

The invention discloses an image perceptual hashing method based on two-sided random projection, which mainly solves the problem of quick searching of massive image data. The method comprises the following steps of (1) preprocessing original image data; (2) obtaining a two-sided random projection matrix; (3) carrying out low-rank approximating; (4) updating a low-rank matrix; (5) judging if the number of iteration times of the updated low-rank matrix is maximum or not; (6) grouping projection vectors; (7) orthogonalizing the projection vectors; (8) obtaining hashing codes; (9) obtaining a hamming distance; and (10) outputting test results. The hashing method has the advantages that the better projection vector can be obtained, the effective hashing codes can be obtained, the memory consumption is reduced, the searching time is saved, the comprehensive performance of precision ratio and recall ratio of image searching can be improved, and the hashing method is applied to the image searching services of electronic businesses and mobile terminal equipment.

The invention provides a cash voucher generation method adopting incremental mining in the retail trade, which mainly comprises a series of processes including using a card, excavating data stream, accessing of knowledge base and printing cash vouchers. Each customer has a membership card which is for free. When the customer uses the card for shopping, a computer automatically checks the shopping mode of the customer, if the shopping mode meets certain conditions, a cash voucher for the customer is automatically printed after a shopping receipt is printed. Concrete steps are as follows: 1. a commodity inventory of retail enterprises, discount commodity database and customer resource database are established; 2. the collection of daily database information and the excavation of long-term data are carried out; 3. commodities bought are scanned and input and each POS machine sends shopping lists of customers to a data excavating tool for generating customer consumption records after data preprocessing; and 4. cash vouchers of conventional consumables or commodities predicted to be bought are printed and discount information is stored in the customer resource database simultaneously.

The invention provides a lithium ion battery system for a hybrid electric vehicle (HEV), comprising a battery box body, battery module groups in the battery box body, a battery management system and a high-voltage device, wherein the battery management system is arranged in the battery box body and is close to one end of a forward engine room in the HEV; the battery box body is provided with an air inlet and an air outlet; the battery module groups are symmetrically arranged at the left and the right in two rows along an air-in / air-out direction; an air-in wedge-shaped channel is reserved between the two rows of the battery module groups; an air-out channel is reserved between the outside of the left and the right battery module groups and the battery box body; the air-out channel is communicated with the air outlet of the battery box body; and a diffuser grid plate is arranged in the air-in wedge-shaped channel so as to strengthen wind resistance to evenly disperse the air at the two sides of a battery pack. Air channels are arranged in a gap between the battery module groups, thus solving the problems of long air flow, unconspicuous cooling effect, and larger temperature difference between the air inlet and the air outlet, and ensuring that the single battery inside the battery pack is even in temperature, simple in structure, and easy to manufacture.

The embodiment of the invention provides an automatic parking implementation method and device based on wireless signal recognition. The method comprises the steps that a wireless signal recognizer on a vehicle reads and obtains a wireless signal transmitted by a wireless signal transmitter, and information of the coordinate position of the wireless signal transmitter carried in the wireless signal is transmitted to automatic parking control equipment which is arranged outside the vehicle; the automatic parking control equipment utilizes the information of the coordinate position of the wireless signal transmitter for calculating and obtaining information of the location of a parking stall, according to the information of the location of the parking stall and information of the current location of the vehicle, relative positions and distance between the vehicle and the parking stall are calculated out, according to the relative positions and the distance, an automatic parking control instruction for the vehicle is generated, the automatic parking control instruction is transmitted to driving control equipment in the vehicle, and the driving control equipment implements the automatic parking control instruction, so that the vehicle is controlled to be parked into the parking stall automatically. By means of the automatic parking implementation method and device based on the wireless signal recognition, the automatic parking of the vehicle can be achieved.

The invention discloses a fourth-generation multi-standard fully-compatible mobile radio-frequency front-end broadband low-noise amplifying device which comprises a single-end input and differential output noise cancellation type low-noise amplifier, a tracking filter quality factor boosting circuit and a class AB module, wherein the single-end input and differential output noise cancellation type low-noise amplifier is used for enabling noise cancellation and signal complementary addition by the aid of opposite phases of signals and noise; the tracking filter quality factor boosting circuit is used for increasing quality factors of an output cavity by adjusting negative transconductance so as to obtain optimal out-of-band interference filtering effects; and the class AB module is used for enabling a current mode amplifier not to be unsaturated so as to respond to strong out-of-band interference. The broadband amplifier adopts single-end input and uses single inductor to meet noise performance, can filter large out-of-band signals and covers TD-LTE (time division-long term evolution), TD-SCDMA (time division-synchronous code division multiple access) and quad-band GSM (global system for mobile communications), and the fourth-generation multi-standard fully-compatible mobile radio-frequency front-end broadband low-noise amplifying device has the advantages of low cost, multiple applicable standards, high data rate, high sensitivity, low noise and small occupied space.

The invention discloses an application software management system and a method. The method comprises the following steps of: detecting a mobile terminal to be detected; classifying application software on the mobile terminal, and finding replaceable software of the application software; periodically counting the service frequency of the application software, and searching application software of which the service frequency is lower than a preset value according to a statistical result; judging whether replaceable software exists in the application software of which the service frequency is lower than the preset value, if so, prompting a user of deleting the application software of which the service frequency is lower than the preset value; and deleting the application software of which the service frequency is lower than the preset value according to a user instruction, wherein the replaceable software of the application software of which the service frequency is lower than the preset value is homogeneous software of the application software, or other homogeneous software except the homogeneous software. According to the application software management system and method, the utilization rate of a storage space at the mobile terminal is improved, and the system and method have wide application prospects in the field of intelligent mobile phones.

The invention discloses a method for evaluating the correctness of voice phonemes. The method comprises the steps that audio data input according to a predetermined text is obtained, wherein the predetermined text comprises at least one target voice phoneme; actual pronunciation data corresponding to the target voice phonemes is analyzed from the audio data; the index, namely the correctness, of the voice phonemes of the actual pronunciation data is evaluated to generate feedback information for reflecting whether the pronunciations of the target voice phonemes are correct or not. By means ofthe method, whether the pronunciations in a voice phoneme level are corrected or not can be fed back in detail, a user is helped to master the correctness of the pronunciations of the voice phonemes,the learning efficiency is improved, and the learning effect is improved. When the user practices pronunciation by using the method, it is not required that a teacher teaches by demonstration or correct the user in reality face to face, so that the limitations of learning time and space are overcome, and the user can do the relevant exercises anytime and anywhere. Besides, the invention further provides a device and equipment for evaluating the correctness of the voice phonemes and a computer readable storage medium. The device, the equipment and the computer readable storage medium has the above advantages.

The invention discloses an actuator cylinder for a folding stay bar and a folding stay bar structure. The actuator cylinder is of a sleeve type structure, and an oil way is arranged on the side wall of a cylinder barrel; a bush which can bi-directionally move relative to a piston rod is arranged at one end of the piston rod, and an elastic element is arranged between the bush and the cylinder barrel. When a rodless cavity of the actuator cylinder has no oil pressure, the piston rod and the bush can completely extend out by the spring force; when the rodless cavity of the actuator cylinder applies pressure, the oil pressure overcomes the spring force to drive the piston rod and the bush to realize the withdrawal function of an eyebolt at the end part. The folding stay bar of the actuator cylinder structurally comprises the actuator cylinder. A rotary joint with an inlet and outlet oil way is integrated in an earhole in the end of the cylinder barrel, and a spring is integrated on the actuator cylinder, so that the structure is simplified, the layout space of a pipeline, the joint and the external spring is omitted, the system weight is reduced. The actuator cylinder can be applied to the folding stay bar structure with a narrow space, strict weight control and need for unfolding locking.

The invention discloses a processing method and a processing device for big data and a terminal. The method comprises the following steps of collecting the big data in internet; performing structured processing on the big data; using the structured data obtained by the structured processing. According to the scheme provided by the invention, the defects of high processing difficulty, large occupied space, low utilization rate and the like in the prior art can be overcome, and beneficial effects of low processing difficulty, small occupied space and high utilization rate are realized.

The invention discloses a five-phase fault-tolerant permanent magnet planetary gear motor for a hybrid electric vehicle and an operation method of the five-phase fault-tolerant permanent magnet planetary gear motor. A permanent magnet gear ring and a permanent magnet sun gear which are coaxial are nested in a stator sequentially, a plurality of pairs of permanent magnets are adhered to both the inner surface and the outer surface of the permanent magnet gear ring, four consistent permanent magnet planetary gears evenly distributed on the periphery are arranged between the inner surface of the permanent magnet gear ring and the outer surface of the permanent magnet sun gear, the permanent magnets are closely adhered to the outer surface of each permanent magnet planetary gear, and the permanent magnet planetary gears are connected with a planet carrier; the permanent magnets closely arrayed are adhered on the outer surface of the permanent magnet sun gear; all the permanent magnets are magnetized along circles in which the permanent magnets are located radially, and each adjacent two permanent magnets are arrayed according to a polarity order of N, S, N and S; and a high-power-density multiple-phase fault-tolerant permanent magnet brushless motor is integrated with the high-torque-density permanent magnet planetary gears, and accordingly space utilization rate, transmission efficiency and torque density are high.

The invention embodiment provides a method for realizing dictionary memory management of Trie tree based on one-dimensional linear space. The method comprises the following steps: acquiring integral dictionary data; generating ordered dictionary data, and storing the data in a one-dimensional array; creating the Trie tree to realize the storing of the dictionary data. The method adopts a one-dimensional array to replace a double array (base [ ] and check [ ]). The method enables the serialization and the serialization of the Trie tree to be more convenient and faster, enables the load storage of the dictionary to be more efficient, meanwhile the method can solve the problem of the data moving or the backtracking of the storage space existing in the method for realizing the dictionary data storing of the Trie tree by the double array.

The invention discloses a method for forecasting ecological risks of pollutant in surface water environment on living beings. Combined with a non-constant water environment module and a water ecology toxicology comprehensive module, the invention discloses a method for assessing the ecological risks in the surface water environment, which comprises a long-term ecological risks assessing method and an acute ecological risks assessing method. The long-term ecological risks assessing method emphasizes the long-term accumulation effect of the pollutant and also takes the ecological toxicology effect and hydrodynamic and water quality space-time trends characteristics into consideration, which is a comprehensive ecological risk assessment method; and the acute ecological risks assessing method emphasizes the acute ecological risk assessment for the pollutant and provides methodology support for rapid ecological risk assessment in surface water pollution events.

The invention relates to a technology for preparing a metal surface coating through compounding multiple processes, which is characterized by preparing a coating on the surface of a metal substrate by simultaneously using three coating preparation processes of thermal spraying, cold spraying and laser remelting. The technology comprises the following steps of: (1) pretreating the surface of the metal substrate; (2) spraying by using electric arcs; (3) remelting by using a laser; and (4) spraying coldly. By simultaneously utilizing the three coating preparation processes, combining the advantages of the three processes and overcoming the defects of the three processes, the technology can be used for preparing the high-performance coating with the functions of abrasion resistance, corrosion resistance, heat resistance, high-temperature oxidation resistance and fatigue spalling resistance in low cost and high efficiency.

The invention discloses a fire-proof rubber material for an air spring. The fire-proof rubber material for the air spring is mainly prepared by raw rubber, a flame-retardant nano composite material, aliquid fire retardant, a plasticizer, an active agent, reinforcement filler, and a vulcanization accelerant, wherein the raw rubber is formed by chloroprene rubber, general solid natural rubber and epoxidized natural rubber, and the flame-retardant nano composite material is a composite nano fire retardant mainly formed by melamine cyanurate, ammonium polyphosphate, polyhedral oligometric silsesquioxane, and organic nano montmorillonite, or the composite nano fire retardant mainly formed by the melamine cyanurate, the ammonium polyphosphate, the polyhedral oligometric silsesquioxane, and nanoaluminum hydroxide. The invention further discloses a preparation method for the fire-proof rubber material. The fire-proof rubber material is capable of keeping a good physical mechanical property of outer rubber of the air spring, and flexing resistance, improving ozone resistance, low-temperature resistance, and oil resistance, and meeting requirements of a European Union rail traffic fire protection standard EN45545-2.

The invention relates to an integrated flywheel and clutch drive mechanism. A drive body has a big outer circle and a small outer circle; convex-concave teeth are uniformly distributed on the big outer circle of the drive body; friction plates are riveted to the two lateral surfaces of a drive plate; a round hole is formed in the center of the drive plate; concave-convex teeth similar to those on the outer circle of the drive body are manufactured on the inner circular surface of the round hole; the drive plate is clamped on the concave-convex teeth on the outer circle of the drive body through the concave-convex teeth on the inner circle; an air cylinder and a drive plate chamber are manufactured on each of the two sides of the flywheel respectively; the drive plate chambers face to the direction of the drive plate; a flywheel is arranged on the small outer circle of the drive body through a gear shaft; a piston is arranged at the opening part of the air cylinder on one side of the flywheel; the piston is sealed with the air cylinder through an air cylinder inner seal ring and an air cylinder outer seal ring; an adjusting nut is screwed at one end of a pull rod; a rotary air inlet joint is arranged in the center of the head of the drive body; and an air intake pipe and an air exhaust pipe are connected with the inner cavity of the air cylinder and the rotary air inlet joint respectively.

The invention relates to the field of auxiliary installation equipment, and specifically relates to a device and a method for replacing vibration motors. The device comprises a mobile trolley, a running track, a lifting mechanism, and a bracket. The mobile trolley is arranged on the running track. The lifting mechanism is arranged on the mobile trolley. The bracket is arranged on the lifting mechanism. The mobile trolley moves on the running track to go out of and into a predetermined area. The lifting mechanism drives the bracket to go up and down to send the bracket to a specified installation or removal position of a vibration motor. By adopting the device and the method, equipment handling by workers is avoided, the labor intensity of workers is reduced, the safety coefficient is high, the problem that vibration motor installation and removal is vulnerable to space limitations and vibration motor transfer is difficult is overcome, and the work efficiency is improved. The device is simple in structure and easy to transport and carry, adapts to a variety of space operations, and is simple and easy to install.

The invention discloses a two-step phase recovery method, a device and a system based on single intensity measurement, belongs to the technical field of optical imaging. The method comprises the following steps: initializing the amplitude and phase of a 2D complex optical field to obtain an initialized space amplitude A1 and an initialized phase as shown in the description; synthesizing a complexamplitude g(x, y) according to the initialized space amplitude A1 and the initialized phase as shown in the description; performing Fourier transform and loop iteration of Fourier inverse transform onthe complex amplitude g(x, y) to obtain an amplitude estimate of the complex optical field in a spatial domain on a 2D coded aperture plane; based on a double intensity phase recovery algorithm, processing the amplitude information of the spatial domain and the measured frequency domain amplitude information to recover the phase of the complex optical field in the spatial domain on the 2D coded aperture plane. According to the two-step phase recovery method, the device and the system based on single intensity measurement, the quality of the reconstructed phase and the success rate of reconstruction can be significantly improved.

The invention discloses a plastic slip sheet based on RFID and a picking-up, placing and information reading method thereof. The plastic slip sheet is a rectangular thin plate made of high density polyethylene materials, and two adjacent side edges of the rectangular thin plate are provided with folded edges respectively. The plastic slip sheet is made of the high polymer materials, has the advantages of being thin, high in tensile strength and free of electromagnetic interference, solves the problems that an existing plastic pallet is thick and heavy and occupies large space, and a paper pallet is not water-proof, and can be widely applied to transfer of various goods. In addition, a special pull-and-push device is designed to match with the plastic slip sheet, and the plastic slip sheet is smoothly picked up and placed, so that a guarantee is provided for application of the plastic slip sheet.

The invention discloses a cylindrical tube sound-liquid comprehensive function coprocessor, comprising a cylindrical tube vessel and ultrasonic transducers, the lateral wall of the cylindrical tube vessel is provided with a plurality of ultrasonic transducers in an embattled way, the direction of ultrasonic irradiation of the ultrasonic transducers is perpendicular to the surface of the lateral wall of the cylindrical tube vessel. The cylindrical tube vessel can be internally provided with an ultraviolet generator, a multi-pore ring tube for exhausting ozone and a catalyst. The invention effectively overcomes the shortcomings of cavitated weak-bit angle space and dead-bit angle space existing in structures with square straight angle-bit form, such as square groove, flat plate, polyhedron and the like. By utilizing the synergistic action of ultrasonic wave, ultraviolet, ozone and nanometer titanium dioxide catalysts, sterilization is carried out on wastewater, dusty gas and solid materials effectively; the coprocessor can be made into supercritical processors and ultrasonic reactors to carry out traditional Chinese medicine extraction, perfume purification, alcoholic beverage seasoning, biodiesel preparation, wood powder and bamboo powder pretreatment and antiscaling and descaling treatment of vessels effectively.

The invention relates to an intelligent assistant diagnostic system for skin ulcer with a machine vision 3D reconstruction technique. A calibration method is adopted and the internal and external parameters of two cameras are obtained respectively; through a set of fixed points in the same world coordinate system, the position relation between the two cameras is set up, through a 3D reconstructionmodel, the color feature of a wound surface, a 3D surface area feature and a texture feature of the wound surface are digitally extracted, at the same time, the color characteristics of the ulcer wound in traditional Chinese medicine are digitally converted, and the therapeutic effect is dynamically evaluated by using the change of skin wound characteristics. The intelligent assistant diagnosticsystem has the advantages that the surface shape and surface area information of chronic wound surface can be calculated directly, which provides the digitized basis for the diagnosis and treatment ofulcer in traditional Chinese medicine, so as to create a more direct and convenient observation and evaluation method for the diagnosis and treatment of chronic ulcer, at the same time, the system accumulates 3D image information, thus establishing a first digital differentiation AI resource database of skin ulcer in the whole process of treatment.

The invention relates to an automatic loading and unloading system for a logistics robot, and belongs to the technical field of logistics application robots. The system comprises a transport mechanism, a lifting mechanism mounted on the conveying mechanism, a bracket mounted on the lifting mechanism, a conveying mechanism and a loading and unloading mechanical arm mechanism, wherein the conveyingmechanism and the loading and unloading mechanical arm mechanism are mounted on the bracket. A part of the bracket is mounted on the lifting mechanism, the rest of the bracket is suspended, and the loading and unloading mechanical arm mechanism is mounted at the tail end of the suspended part of the bracket. The conveying mechanism comprises a driving motor mounted on the bracket, a driving wheelmounted at the output end of the driving motor, a driven wheel, a tightening wheel and a conveying belt, wherein the driven wheel and the tightening wheel are rotatably mounted on the bracket, and thefeeding belt sleeves the driving wheel and the driven wheel. The tightening wheel is located below the feeding belt and extrudes the lower surface of the belt, supporting columns and guardrail beltsare arranged on the two sides of the bracket, the supporting columns are fixed to the bracket, the guardrail belts are fixed to the supporting column, and the guardrail belts are located on the two sides of the feeding belt. The system can realize automatic loading and unloading on containers and cargo vehicles.

The invention relates to an impact testing device for a parachute landing unmanned aerial vehicle damper and a method thereof. The impact testing device comprises a displacement sensor, an electric discharging loop, an electric discharging coil, an induction coil, a conical driving head, a guiding shaft and a pressure sensor. The electric discharging loop performs instantaneous electric discharging on the electric discharging coil. Strong pulse current is generated in the discharging coil and furthermore an alternated high-strength magnetic field is formed at the periphery of the discharging coil. The induction coil closely abuts against the electric discharging coil. Because electromagnetic induction generates strong eddy current, the directions of the magnetic fields generated by the electric discharging coil and the induction coil are opposite, thereby generating an electromagnetic repulsion force, namely an electromagnetic impact force. The electromagnetic impact force performs impact loading on a to-be-tested damper through the conical driving head and the guiding shaft. Impact force data are acquired through a pressure sensor. Compression amount of the damper is acquired through the displacement sensor. The impact testing device and the method have advantages of accurate controllable impact force, high stability, simple operation and small land occupation. The impact testing device and the method thereof overcome defects of large land occupation, tedious operation and limited impact energy in a landing vibration testing platform for damper impact testing.

The invention provides a pedestrian re-identification method and system based on a residual attention mechanism space-time joint model. The pedestrian re-identification method comprises the steps of performing feature extraction on an input pedestrian through a pre-trained ResNet-50 model; constructing a residual attention mechanism network, wherein a residual attention mechanism network comprisesa residual attention mechanism module, a feature sampling layer, a global pooling layer and a local feature connection layer; according to the trained residual attention mechanism network, using cosine distance to calculate a characteristic distance and recording the characteristic distance as a visual probability; performing modeling according to a camera ID and the frame number information space-time probability in the training sample pedestrian label, and performing Laplace smoothing processing on a probability model to acquire a pedestrian re-identification result by utilizing the visualprobability, the space-time probability and the final joint space-time probability. The pedestrian re-identification method based on the Bayesian joint probability solves the problem that an existingmethod ignores time and space prior information in a camera network, optimizes network iteration by using an attention residual mechanism network, accelerates convergence, and enables pedestrian re-identification precision to be higher through optimized Bayesian joint probability solution.