193results about How to "Simplify the design process" patented technology

The invention relates to the technical field of railway engineering construction, and discloses a complex region railway engineering construction road intelligent line selection and evaluation decision method, which comprises the following steps: S1, in combination with terrain environment conditions and construction technology standards of a construction road, constructing an improved HAO plane line shape mathematical model, designing plane line shape constraint conditions, and constructing a line shape model; and establishing a line comprehensive cost model as an optimization objective function, and searching an optimal plane linear position parameter in a target area by using a particle swarm optimization algorithm. Compared with other intelligent line selection methods, the method can quickly evaluate and decide the advantages and disadvantages of the route scheme while quickly generating the horizontal and vertical section line shape of the construction road, optimizes the design process, facilitates the shortening of the construction period of the construction road, can remarkably reduce the workload of site survey and manual design, and improves the construction efficiency. The working efficiency and benefits of line selection design are practically improved, the investment of line selection cost is reduced, use is convenient, and the degree of dependence on equipment performance is low.

The embodiment of the invention provides a dexterous hand control method and device, an intelligent agent and a storage medium, and the method comprises the steps: obtaining sensor data, preprocessing the sensor data, obtaining input information which comprises environment information and state information of a dexterous hand, inputting the input information into a cerebellum model, and obtaining a corresponding control instruction, the cerebellum model comprises a trajectory planning model and a motion controller, the trajectory planning model is used for outputting a corresponding trajectory planning result according to the input information, and the motion controller is used for converting the trajectory planning result into a corresponding control instruction; the motion controller is obtained by combining a cerebellum model neural network and a whole body dynamic model based on a model predictive control algorithm, and performs driving control on an execution mechanism module of the dexterous hand according to a control instruction. According to the dexterous hand control method provided by the embodiment of the invention, the control flexibility and accuracy can be improved.

The invention relates to the technical field of data processing and three-dimensional model construction, in particular to an intelligent three-dimensional model design method and system based on small-opening press-blow molding equipment. The method comprises the following steps that an intelligent sensor is used for collecting parameters of small-opening press-blow forming equipment, and initial equipment parameter information is recorded; according to the initial equipment parameter information, establishing an equipment three-dimensional initial model by using computer aided design software; and acquiring characteristic data of the glass material drops, inputting the characteristic data of the glass material drops into the three-dimensional initial model of the equipment, simulating a press-blow molding process by utilizing simulation software, and carrying out influence evaluation on the simulated press-blow molding process to obtain a molding process evaluation result. Through a data processing technology, a three-dimensional modeling technology and an automatic control technology, various parameters of the small-opening press-blow molding equipment are associated and evaluated, and an intelligent three-dimensional model of the equipment is constructed; and the accuracy of control operation of the forming equipment is improved, so that the produced glass containers are kept consistent in specification.

The invention provides a three-dimensional pipeline support hanger batch plotting method and device, and the method comprises the steps: obtaining model data of a selected plotting three-dimensional pipeline support hanger, supplementing and matching material information data and inputting self-defined data, and carrying out the conversion to form final three-dimensional pipeline support hanger model output data; and outputting data based on the three-dimensional pipeline support hanger model, matching and replacing data in a standard drawing template, and generating a finished product support hanger construction drawing. The overall drawing efficiency of the support hanger can be improved, the workload of manual drawing is reduced, human errors are reduced, the design process is optimized, and the design efficiency and quality are improved.

The invention discloses an adaptive power control method for a duplex-winding induction generator system, and belongs to the technical field of generator control. The double-winding induction generator system is composed of a double-winding induction generator, an energy storage unit, a static excitation converter and a diesel engine. According to the self-adaptive power control method, control winding current is decoupled into excitation control and electromagnetic torque control through coordinate transformation based on rotor flux linkage orientation, independent adjustment of output power of the generator is achieved, passive regulation and control of power of an energy storage unit are achieved through control of electromagnetic torque of the generator, and the self-adaptive power control method is achieved. The problem that the control freedom degree of a single converter system is insufficient is solved. Besides, according to the control method adopted by the invention, a dynamic planning-based generator / energy storage unit power distribution strategy with minimum fuel loss as a target is adopted, so that the generator is ensured to always work in a high-efficiency interval of the diesel engine within a wide load change range, and the power generation cost is remarkably reduced.

The invention discloses a listed company risk assessment method based on cross validation and Bayesian optimization, and the method comprises the following steps: 1, obtaining the comprehensive factor data of a listed company, carrying out the dimension reduction of the factor data through employing a principal component analysis method, obtaining a principal component factor, carrying out the effectiveness verification of the principal component factor through an IC and IR analysis method, and carrying out the calculation of the risk of the listed company; selecting a plurality of principal component factors as input features; 2, on the basis of the multi-factor model, constructing an ensemble learning index enhancement model by taking a decision tree and an AdaBoost algorithm as cores; 3, performing system optimization on parameters of the ensemble learning index enhancement model by adopting cross validation and a Bayesian method, and finally determining an optimal parameter combination to obtain a trained ensemble learning index enhancement model; and 4, evaluating the risk of the listed company by using the trained integrated learning index enhancement model. According to the method, the calculation resource consumption of the model can be reduced, the calculation efficiency is improved, and the over-fitting risk of the model can be reduced.

The invention discloses a local removable movable denture design method based on a large model, which comprises the following steps: S1, collecting diversified oral cavity scanning data, and constructing a standard model covering different tooth arrangements, occlusion relationships and jaw structures; s2, scanning oral cavity model data of a target object to generate a 3D digital model; s3, comparing the generated 3D digital model with a standard model, and identifying and marking tooth restoration elements; and S4, determining a design scheme of the locally removable removable denture according to the marked tooth restoration elements. The method provided by the invention solves the challenges faced by current grassroots physicians and medical students in denture design, and has wide application prospects and social benefits.

The invention relates to the technical field of data mining, in particular to a method and a system for generating a printed circuit board design drawing. The method comprises the following steps: obtaining customer demands, structuring the customer demands into circuit board design demand data, and then carrying out mode clustering to obtain design demand mode data; acquiring a historical design log, performing circuit board hierarchical design clustering based on the historical design log to obtain historical hierarchical design data, and performing wiring structure topology analysis to form a wiring structure model set; quantifying a wiring demand, obtaining wiring demand data based on demand mode data, and matching the hierarchical wiring structure model set to form a matching model; the layout component is used for carrying out component layout on the matched wiring structure model, generating component layout data and planning the direction of a signal line to form a hierarchical structure model; and performing electromagnetic interference simulation, optimizing the hierarchical structure model based on simulation data to balance heat flow, and finally generating a circuit board design drawing. The design efficiency of the circuit board can be improved.

The invention provides a nonlinear system tracking control method with segmented discontinuous output constraints, and aims to solve the problem that a constraint boundary function is discontinuous but bounded at a certain moment within a period of time when a system starts to run and solve the problem that system output is not limited by constraints at a certain moment. Different from most existing methods requiring consecutive and bounded constrained boundary functions and high-order derivatives thereof, the method provided by the invention only needs consecutive and bounded converted constrained boundary functions and first-order derivatives thereof, so that the requirements on the constrained boundary functions are relaxed, the practicability of a control strategy is greatly improved, and the complexity and calculation burden of a controller are reduced. Besides, by changing discontinuous moments without changing the structure and design parameters of the controller, the proposed control strategy can also be suitable for other constraint situations, such as continuous constraint conditions, discontinuous constraint conditions at specific moments and unconstrained limitation of system output at a certain moment, so that the practicability of the control strategy is further enhanced.

The silencing body comprises a first wall and a second wall which are arranged in a spaced mode, at least one partition plate is connected between the first wall and the second wall so that at least one sound cavity can be formed between the first wall and the second wall, and an opening penetrating through the wall thickness is formed in the part, corresponding to the sound cavity, of one of the first wall and the second wall; when the number of the sound cavities is at least two, the structures and the sizes of all the sound cavities are the same, and all the sound cavities correspond to the preset target frequency, so that the noise elimination body can perform noise elimination and noise reduction on the noise of the target frequency; wherein when the size parameter of the sound cavity is determined, the target frequency of the noise absorbed by the sound cavity is acquired; determining a frequency correction coefficient; obtaining a correction frequency according to the frequency correction coefficient and the target frequency; and designing size parameters of the acoustic cavity according to the correction frequency. The silencing body corresponds to the target frequency to be eliminated, the silencing and noise reduction effect is good, and the silencing body can be modularized easily.

The invention discloses a relay which comprises a contact assembly and an arc extinguishing assembly. The contact assembly comprises two contact parts, one contact part is provided with a first static contact and a first leading-out piece, the first static contact is arranged on the first leading-out piece, and the other contact part is provided with a first movable contact used for making contact with or being separated from the first static contact. The arc extinguishing assembly comprises a magnetic conductive piece and a permanent magnet, the magnetic conductive piece is connected with the first leading-out piece, and the permanent magnet is arranged on the side, facing the first movable contact and the first static contact, of the magnetic conductive piece, located around the first movable contact and the first static contact and used for extinguishing electric arcs generated between the first movable contact and the first static contact.

The invention provides a nucleic acid full-atom structure generation method and device, electronic equipment and a storage medium. The method comprises the following steps: acquiring an initial nucleic acid sequence containing a random sequence and a noise-added initial full-atom coordinate; inputting the initial nucleic acid sequence and the initial full-atom coordinate into a trained diffusion model to obtain a generated nucleic acid sequence and a generated full-atom coordinate output by the diffusion model; wherein the diffusion model is obtained based on sample nucleic acid structure training. According to the nucleic acid full-atomic structure generation method and device, the electronic equipment and the storage medium, the sequence and the full-atomic coordinates are diffused at the same time by applying the diffusion model, and the nucleic acid full-atomic structure generation method and device have the capacity of generating nucleic acid full-atomic coordinates from the beginning and controllably generating the nucleic acid full-atomic coordinates. In addition, a single model is used for completing the work of separately designing a plurality of models in the past, the design process is more concise, and the result is more credible.

The present application provides a method and device for processing the worst performance of integrated circuits, electronic equipment, and medium, which are applied to the field of integrated circuit design and reliability assessment technology. By further narrowing the sampling range based on the importance sampling principle near the initially obtained failure boundary, and determining the circuit performance prediction value of the circuit performance normally distributed at the 6-sigma position, and then combining the prediction value with the linear model of the circuit performance to form an optimization problem, the process deviation vector close to the actual situation is solved, and finally the actual circuit performance value at the 6-sigma position is obtained through circuit simulation based on the process deviation vector close to the actual situation. The boundary value of the circuit performance space is quickly and accurately solved to the worst performance close to the actual situation at limited simulation points, which significantly improves the efficiency and accuracy of integrated circuit performance evaluation.

The invention relates to a heat pool and a heat management system for realizing automobile exhaust waste heat recovery by utilizing fused salt heat transfer and heat conduction. The hot pool comprises a tail gas flowing pipe, a heat conduction oil flowing pipe and a hot pool shell, and a phase-change material fused salt is contained in the hot pool shell. According to the heat pool, on the basis of two media, high-boiling-point heat conduction oil is used for replacing low-boiling-point refrigerants, fused salt media are added, mutual heat exchange of the three media is achieved, corrugated pipes are used for replacing common steel pipes, the problem that circulation of heat exchange media is interrupted due to indirect and random automobile exhaust emission is solved, integration of heat transfer and heat storage is achieved, and the service life of the heat pool is prolonged. The heat transfer and storage capacity is high. The system comprises an air conditioner loop module, an engine loop module, a heat pool heat release loop module, a battery loop module and two five-way valves. The system has various different application scenes, tail gas directly exchanges heat with heat conduction oil in the heat pool heat exchanger to achieve direct heat release, heat in the tail gas is stored in the phase change material, and heat storage and heat exchange are achieved when the system needs to be used.

The invention discloses a double-screw compressor rotor profile and a double-screw compressor, and belongs to the technical field of compressors, the rotor profile comprises a male rotor tooth curve and a female rotor tooth curve, the male rotor tooth curve comprises an A1B1 section, a B1C1 section, a C1D1 section, a D1E1 section, an E1F1 section, an F1G1 section, a G1H1 section and an H1I1 section which are sequentially and smoothly connected; the tooth curve of the female rotor comprises an A2B2 section, a B2C2 section, a C2D2 section, a D2E2 section, an E2F2 section, an F2G2 section, a G2H2 section and an H2I2 section which are sequentially and smoothly connected. The tooth curve of the male rotor is obtained by converting the rack line from a rack coordinate system to a tooth profile coordinate system of the male rotor; and the female rotor tooth curve is obtained by converting the rack line from the rack coordinate system to the tooth profile coordinate system of the female rotor. By means of the sectional tooth curve, the large calculation amount caused by directly optimizing the female rotor profile and the male rotor profile can be avoided, and therefore the design efficiency of the rotor profiles is improved.

The invention discloses a reflection / transmission integrated color filter based on a photonic crystal-dye-transparent polymer composite and a preparation method thereof, and the color filter is composed of an opal photonic crystal template formed by nanometer microspheres and a dye-transparent polymer composite filled in gaps of the opal photonic crystal template. Through compounding of the nano-microspheres, the dye and the transparent polymer, the photonic crystal and the dye can cooperatively filter visible light with specific wavelength, and two filtering modes of reflection and transmission are achieved; the absorption peak width of the photonic crystal can be widened due to the light absorption characteristic of the dye, and a high-purity light filtering effect is generated in a reflection mode; the photonic band gap of the photonic crystal can adjust the light cut-off wave band of the dye, a high-purity light filtering effect is formed in a transmission mode, the photonic crystal-dye-transparent polymer composite reflection / transmission integrated color filter with high-purity color output is finally achieved, the property is stable, and the photonic crystal-dye-transparent polymer composite reflection / transmission integrated color filter has wide application prospects in the fields of display, optical instruments and the like.

The invention discloses an implementation system and method for parametric modeling and construction drawing drawing of a truss trestle in the technical field of auxiliary building design, and the implementation system and method are implemented based on a Y-GAMA platform, and the implementation method comprises the steps: obtaining control parameters input by a user; on the basis of the control parameters input by the user, a truss trestle component model is established in combination with a pre-manufactured card bag; the truss trestle component model is endowed with structural attributes, parametric modeling load guiding is completed, and a three-dimensional model is generated; after components of the three-dimensional model are classified, the components are projected to a view plane to form an arrangement diagram; performing linear labeling and geometric transformation on the arrangement diagram to generate a construction drawing; and parameterized node design and node construction drawing drawing are carried out on the construction drawing. According to the method, the innovation of trestle design work in the industrial building field is greatly promoted, the design period is remarkably shortened, the design quality is improved, and errors and omission caused by manual operation are avoided.

The invention discloses a BIM-based existing building parameterization design method, and particularly relates to the field of building optimization design, and the method comprises the following steps: firstly, carrying out the data collection of an existing building, building a BIM model, simulating the daily use condition of the BIM model, and obtaining a noise data set of each region; judging whether noise pollution exists or not through the noise data, if yes, dividing the area into pollution areas, and summarizing the data to generate a pollution information set; performing clustering analysis based on the information set, generating a pollution level form, and generating a comprehensive pollution coefficient by using a pre-trained machine learning model; and selecting average or maximum noise as an optimization target according to the coefficient, finding an optimal optimization parameter combination by using a genetic algorithm, and finally forming an optimization design scheme of the whole building. According to the method, differentiated design of different noise level areas is guaranteed, the forced sound insulation requirement of a high-noise area can be met, and an area with low noise can be moderately optimized.

The invention discloses a low-profile dual-circularly-polarized Ka-band phased-array antenna which mainly solves the problems that a traditional circularly-polarized phased-array antenna is high in profile, complex in structure and incapable of polarization multiplexing. The antenna feed structure and the metal patch structure are symmetrical, the left-hand and right-hand circular polarization feed ports are directly connected with the radiation patch to excite the patch to generate left-hand circular polarization and right-hand circular polarization respectively, regulation and control from single circular polarization to dual circular polarization are achieved, the left-hand and right-hand circular polarization feed ports are directly connected with the radiation patch, and the radiation patch is directly connected with the left-hand and right-hand circular polarization feed ports. The patches are excited to generate left-hand circular polarization and right-hand circular polarization respectively, other extra structures are not introduced, the antenna design process is simplified, and polarization multiplexing of the circularly polarized antenna is achieved. The antenna is composed of the two layers of dielectric plates, a complex middle feed network is omitted, and the antenna has the advantages of being simple in structure and low in profile.

The invention is applicable to the technical field of organic liquid addition and dehydrogenation, and provides an organic liquid addition and dehydrogenation integrated reactor and system.The integrated reactor comprises a reactor shell, and a reactor upper seal head and a reactor lower seal head are arranged on the reactor shell; a first hydrogen opening, a liquid inlet distributor, an LOHC inlet and an LOHC outlet are formed in the reactor upper sealing head; a second hydrogen opening and an LOHC liquid opening are formed in a lower sealing head of the reactor; a plurality of reaction tubes are arranged in the reactor shell, and the reaction tubes are filled with a catalyst; a sieve plate is arranged at the bottom of the reactor shell; a heat-conducting oil inlet and a heat-conducting oil outlet are further formed in the reactor shell, and a baffle plate is further arranged in the reactor shell. The system effectively solves a plurality of problems and cost pain points of a traditional separated reactor, and provides a hydrogen storage solution which is more efficient, economical and safe.

A physical information machine learning design method of a multi-component composite high-thermal-conductivity filler belongs to the technical field of composite high-thermal-conductivity filler design, and comprises the following steps: S1, establishing a material intrinsic attribute data set; s2, establishing a three-dimensional space closest packing model; s3, setting boundary constraint conditions; s4, optimizing a machine learning algorithm; and S5, carrying out proportion conversion. According to the method, an existing machine learning technology is utilized, a comprehensive data set is constructed, a machine learning algorithm is applied, the porosity is reduced and heat conduction paths are increased through accurate material particle size matching, and different three-dimensional space closest packing theoretical models are correspondingly selected according to material intrinsic attributes; therefore, on the basis of optimizing the stacking structure of the optimal filler of the heat-conducting polymer composite material, forming an efficient heat-conducting path and keeping the processing performance of the heat-conducting polymer composite material, the design and manufacturing processes are simplified, the production efficiency is improved, and powerful technical support is provided for effective heat dissipation and reliable and stable work of electronic equipment.

The present invention belongs to the field of motor heat dissipation, and specifically relates to a semi-superconducting motor adaptive heat dissipation control method and system, which aims to solve the problems of insufficient real-time performance, complex models, high difficulty in optimizing control strategies, and poor adaptability in the prior art. The present invention includes: obtaining real-time temperature data of the motor; inputting the real-time temperature data and motor load data as input data into a fuzzy control algorithm optimized based on a genetic algorithm; the fuzzy control algorithm calculates control parameters based on fuzzy rules, and adjusts the speed of the motor fan and the heat dissipation area of ​​the radiator based on the control parameters. The present invention can flexibly change the search strategy of the genetic algorithm according to the individual's fitness, improve the search efficiency and optimization results, can accurately control and adapt to a variety of systems, increase the service life of the motor, and simplify design and debugging.

The hydraulic system comprises an oil tank, a power unit, a high-pressure filter assembly and a control valve assembly, a mounting groove is formed in the upper end of the oil tank and penetrates through the left side and the right side of the oil tank, the power unit is connected into the mounting groove, and the high-pressure filter assembly is connected with the control valve assembly. The power unit is communicated with the interior of the oil tank through a pipeline, the high-pressure filter assembly is connected to the side, penetrated by the mounting groove, of the oil tank and communicated with the power unit through a pipeline, and the control valve assembly is connected to the upper end of the oil tank and communicated with the high-pressure filter assembly and the execution element through pipelines. An oil return valve set is further arranged on the oil tank and connected with the oil tank and the execution element through pipelines. The power unit, the high-pressure filter assembly, the control valve assembly, the oil return valve set and other key assemblies are integrated around the oil tank, the vehicle space is greatly saved, and the whole hydraulic system is more compact.

The invention discloses a singular perturbation-based preset performance control method for a multi-motor driving system, which realizes effective control on slow and fast states and ensures the performance and stability of the system in the presence of singular perturbation. The method comprises the following steps: carrying out dynamic modeling on a multi-motor driving system, and decomposing a dynamic equation of the system into a fast subsystem and a slow subsystem by adopting a singular perturbation system; converting the tracking error by using a preset performance boundary, and obtaining a dynamic equation of the conversion error; the method comprises the following steps: converting an original limited tracking error into an unlimited tracking error through error conversion, converting an original limited tracking control problem into an unlimited tracking control problem, and ensuring that the converted tracking error is bounded, so that the original tracking error is kept within a preset performance boundary; designing a sliding mode surface and a disturbance observer, and estimating external disturbance suffered by the system; and designing a sliding mode controller, and performing compensation control by using the estimated external disturbance.

The invention discloses an under-actuated underwater robot predefined time sliding mode control method, and belongs to the technical field of ship control. Firstly, a five-degree-of-freedom mathematical model for trajectory tracking of the under-actuated underwater robot is constructed; then constructing a model conversion scheme, and designing a radial basis function neural network compensation rate according to the basic constant force of the minimized learning parameter; thirdly, integrating the results of the above steps on time, and designing an adaptive tracking controller with predefined time convergence performance in combination with a Gaussian error function; and finally, according to the expected trajectory and the control parameters, motion control is performed through the adaptive tracking controller. Under the action of the integrated predefined time controller designed by the invention, the under-actuated underwater robot can effectively avoid the influence of external interference and unknown model parameters on the under-actuated underwater robot, and three-dimensional trajectory tracking control with predefined time convergence is realized.

The invention discloses a Wreshark message analysis plug-in generation method and system, and relates to the technical field of computer networks, and the method comprises the steps: obtaining a designed protocol hierarchical relation graph; analyzing the protocol hierarchical relation graph by adopting a hierarchical relation graph analysis engine to obtain association and key contents of field values between hierarchies and in the layer, and analyzing a protocol design document by adopting a protocol design document engine to obtain a field set; taking the bit width of the data type in the Wireshark plug-in as a reference set, processing the bit width of a field according to a protocol field splitting algorithm, and marking the type and mask of the field to obtain a field set mask; building plug-in elements according to the field set masks; and generating a protocol analysis plug-in according to the hierarchical relation graph, the protocol design document and the plug-in element. According to the method, the plugin development threshold can be reduced, the problems of complexity and diversity of protocol design, uncertain fields and the like are solved, and the Wreshark message analysis plugin is efficiently, accurately and automatically generated.

The invention discloses a variable-flow submersed nozzle based on continuous cast steel production, and relates to the technical field of submersed nozzles, the variable-flow submersed nozzle comprises a base, the top surface of the base is provided with a flow control mechanism used for controlling the flow of cast steel liquid, and the top surface of the base is provided with an auxiliary flow mechanism used for assisting the flow of the liquid steel; the flow control mechanism can be blocked in the submersed nozzle, so that the flowing space of molten steel in the nozzle is reduced, the flow of the molten steel is controlled, a stop block is relatively simple to use, a complex flow control system and related equipment are not needed, the complexity and cost of the system are reduced, potential fault points are reduced, and the service life of the system is prolonged. The auxiliary flowing mechanism can knock the isolation plate, impurities attached to the isolation plate can be shaken off by knocking the isolation plate, the cleaning effect is achieved, blockage of a water gap can be reduced by cleaning the blocked isolation net, the fluidity of molten metal is improved, and therefore the production efficiency is improved, and the rejection rate can be reduced and the product quality can be improved by cleaning the blocked isolation net.

The invention discloses an absorbent for fine desulfurization and decarburization of blast furnace gas, and relates to the technical field of desulfurization and decarburization of blast furnace gas. The phase-splitting agent comprises a phase-splitting agent, an alcohol amine chemical absorbent and water, the phase-splitting agent is sulfolane, and the alcohol amine chemical absorbent is diethanol amine; wherein the mass fraction of sulfolane accounts for 50-70%, the mass fraction of diethanol amine accounts for 15-25%, the balance is water, and the sum of the mass fraction percentages of the components is 100%. According to the invention, a two-phase absorbent is innovatively adopted, and the absorbent aims to overcome the limitation of a traditional absorbent and realize the function of fine desulfurization cooperating with carbon capture; the invention further relates to a blast furnace gas fine desulfurization and decarbonization combined device and a using method thereof.

The invention provides a blood brain barrier bionic micro-fluidic chip device, and belongs to the technical field of bionic chips. The system comprises a concentration gradient generation module and a blood brain barrier bionic module. A concentration gradient generation module chip of the concentration gradient generation module is of a tree-shaped structure, and the concentration gradient of the medicine is generated through a multiple dilution method; according to the module, the uniform concentration gradient is formed at the outlet by accurately controlling the drug concentration, and the intervention effect of the drug on the disease can be researched according to the dose-effect relationship in one experiment. The blood-brain barrier bionic module comprises an upper-layer chip and a lower-layer chip which are separated by a porous film, and the upper-layer chip simulates a blood vessel end of a blood-brain barrier; and the lower-layer chip simulates a brain end. The design partially reproduces the cell structure and function of the blood-brain barrier, and allows researchers to establish a more effective blood-brain barrier model in vitro.

The invention discloses a real-time target detection, tracking and motion prediction method for automatic driving, and belongs to the technical field of automatic driving. The method mainly comprises the following steps: 1, receiving three-dimensional point cloud data and corresponding two-dimensional image data; 2, extracting feature representation of the point cloud and the image; 3, performing multi-modal information fusion on the image features and the point cloud features by adopting a step-by-step fusion mode to obtain self-adaptive fused voxel features; 4, according to the self-adaptive fused voxel features, a target detection output head, a behavior tracking output head and a behavior prediction output head are adopted for analysis, and a detection result, a tracking result and a prediction result of the moving objects around the vehicle are obtained. According to the method, a single convolutional neural network is utilized, and three-dimensional point cloud data and corresponding two-dimensional image information are combined, so that efficient and accurate three-dimensional object detection, tracking and motion prediction are realized. Through a unified network architecture, traditional multi-stage processes are integrated into one model, and the efficiency and performance of the system are improved.