36results about How to "Meet the simulation requirements" patented technology

The invention discloses a finite element human body modeling method oriented to human body communications, belonging to the technical field of human body communications. The method comprises the following steps: (1) performing geometrical abstraction to every part of a human body according to the shape properties of every part of the human body; (2) defining an inner geometrical structure of every part of the human body; (3) setting electromagnetic property parameters of stratum mediums in every part of the human body; (4) connecting every part of the human body to form a completed finite element model of human body. The finite element human body modeling method oriented to human body communications provided in the invention can form a finite element human body software model with the geometrical property and electromagnetic property which are similar to an authentic human body, and the finite element human body software model has significance to the study and application of the human body communication technology.

The invention provides a light-source optimization method adopting a compressed sensing technology. The light-source optimization method comprises the following steps: firstly selecting a group of standard orthogonal basis and enabling a light-source graphic to be sparse on the standard orthogonal basis; then expanding the light-source graphic on the standard orthogonal basis to obtain coefficient vector theta and constructing the SO optimization problem into an image restoration problem of solving a minimum L1 norm of theta under the linear-limitation condition, wherein the linear-limitation condition is as follows: imaging in photoresist on a plurality of observation points set at a wafer is consistent to a target graphic. Compared with the traditional SO algorithm adopting the conjugate gradient method, the SO method has the advantages that the operation efficiency can be more effectively improved, and the manufacturability of the optimized light source and a process window of a photoetching system can be improved; simultaneously, a vector imaging model is adopted for describing the imaging process of the photoetching system, the optimized light source not only is applicable to the condition of small NA, but also is applicable to the condition that NA is more than 0.6, and meets the requirement for the simulation precision of high-NA immersed type photoetching system.

The invention discloses a dual-chord width earth simulator. A first earth simulator consists of a first cold plate, a second cold plate and a first hot plate. A second earth simulator consists of a third cold plate, a fourth cold plate and a second hot plate. The first hot plate is a semicircular sheet embedded into a pedestal, and has an upward opening. A motor driving mechanism passes through the central point of the semicircle of the first hot plate to serve as a main shaft of the first earth simulator, and can control the rotation of the first and second cold plates to shade the outer surface of the semicircle of the first hot plate respectively. The second hot plate is semi-cylindrical and embedded into the pedestal, and has the upward opening. A driving shaft of the motor driving mechanism is overlapped with the axis of the semi-cylinder. The motor driving mechanism can control the rotation of the third and fourth cold plates to shade the inner surface of the semi-cylinder of the second hot plate to simulate variations of the chord width of the earth respectively. The dual-chord width earth simulator can meet the scanning requirements of a biconical earth sensor, and simultaneously provides a measurement target for two paths of infrared channels.

The invention relates to a high-altitude environmental simulation cabin, and optimally selects a highland airline civil aircraft simulation cabin and a construction method thereof. A vacuum system anda special temperature system are added on the basis of a hyperbaric oxygen chamber, and the improved parts mainly include the functions of an air supplying and discharging system, a humidity adjusting system and an oxygen supplying and discharging system; after transformation, a high-low pressure oxygen cabin with a pressure increasing function and a pressure decreasing function can be obtained,and besides the functions of a conventional hyperbaric oxygen therapy, the function of simulating a high-altitude environment is further achieved, so that the cabin can serve as the highland airline simulation cabin. The highland airline simulation cabin can be used for selection of pilots and astronauts, high-altitude physical and psychological training, medical identification, low-pressure oxygen deficit simulation experience, highland adaptability experience, aerospace medical experience, physical training, basic medical researches and other work.

The invention provides a method for winding a dynamic analogue element by adopting stranded conductors, wherein, stranded enameled insulation conductors are taken as winding conductors of transformer model and reactor model to wind coils, thus achieving the aim of reducing eddy current loss and reducing unbalanced current loss; stranded enameled insulation conductors are taken as winding conductors of circuit model element in dynamic analogue system of the electric power system to wind the coils, thus achieving the aim of ensuring that the variation trend of the time constant frequency characteristic is in conformity with the prototype; additionally, the circuit model wired by stranded conductors also greatly reduces the skin effect of circuit. Therefore, the method for winding circuit model element by adopting stranded enameled insulation conductors in the invention can satisfy the requirement of realistic simulation.

The invention provides a micro-mirror array control method for implementation of a free illumination pupil. The method includes: limiting an initial value of deflection angle of each micro-mirror unit to a certain range so that reflected spots on a target face are close to a target light density distribution area; using differences between actual light intensity distribution of the target face and light intensity density of a target to be produced, as evaluation functions, and grouping the evaluation functions according to magnitudes of pixel values of points; keeping unchanged defection angle for each micro-mirror unit which corresponds to one point having the pixel value satisfying the convergence condition; calculating an optimal value of the defection angle of each micro-mirror unit which corresponds to each point which has the pixel value not satisfying the convergence condition, updating the evaluation functions, screening the points each having the pixel value not satisfying the convergence condition, and re-updating the optimal values until convergence. The method has the advantages that the drive voltage value of a micro-mirror array can be effectively returned fast, and quick switching of different illumination modes is achieved.

The invention discloses a coal bed similar material and a preparation method thereof. The coal bed similar material is prepared from the following raw materials in percentages by weight: 15% to 36% of pulverized coal, 18% to 45% of aluminate cement, 10% to 35% of gypsum, 0.5% to 3.6% of active carbon, 0.4% to 1.8% of a polycarboxylate superplasticizer, 0.2% to 1.0% of sodium dodecyl sulfate, 0.3% to 1.5% of carboxymethylcellulose and 10% to 35% of water. The preparation method comprises the following steps: weighing the raw materials in proportion; uniformly mixing the pulverized coal, the aluminate cement, the gypsum, the active carbon and the carboxymethylcellulose to prepare a powder material A; adding water to the polycarboxylate superplasticizer and the sodium dodecyl sulfate, and uniformly stirring to prepare a liquid material B; adding the powder material A into the liquid material B, and uniformly mixing; then putting a mixture into a mold, and carrying out compression molding; conserving the material for 14 d after forming so as to obtain the similar material. The similar material is similar to a real coal bed, is simple in preparation method, easy in operation and high in stability, and has wide practicability.

The invention belongs to the technical field of simulation of gearboxes, and provides a method for designing a universal model of a Matlab based dead axle gearbox in order that the universal model can be applied to simulation of an AMT (automated mechanical transmission) system and can complete dynamic analysis during gear shift and control strategic debugging. The method designs a universal gearbox dynamic model which is integrated with a synchronizer and shafting, realizes prediction of performance of a control system, solves the problem that variation laws of torque and rotation speed during gear shift cannot be obtained, provides a powerful support for selecting gear shifting laws during development of the AMT system and power breakage control during gear shift, and gives a big help for improving gear shifting stability and reliability of friction components of vehicles. By the method, development period of the AMT system is shortened, development cost is reduced, work efficiency is improved, and great and progressive significance is provided for project development.

The invention relates to a virtual crowd motion simulation framework. The virtual crowd motion simulation framework comprises 1) a main control console part which comprises a display control sub part, a rendering management sub part, an environment management sub part, a crowd management sub part, a clock updating control sub part and the like and supplies various configurations required by normal running of a program and scheduling and management functions to the sub parts, 2) an environment expression part for organizing and managing environment information of an environment where a crowd is positioned and supporting inquiry and updating for the environment information, and 3) an individual simulation part which consists of a behavior generation layer, a behavior execution layer and a physical implementation layer and is used for simulating motion behaviors of a single individual in the crowd, wherein the behaviors of the individuals in the crowd are organically combined, so that the motion simulation of the crowd is implemented. The virtual crowd motion simulation framework is relatively high in generality, verisimilitude and flexibility and can simulate the virtual crowd motion under various scenes and influence of multiple environment factors.

The invention discloses an expandable internal combustion engine crankshaft system simulation device, which comprises a mounting platform, a crankshaft group, a servo motor and a crankshaft working condition equivalent assembly, the crankshaft set is driven by the servo motor, the crankshaft working condition equivalent assembly is driven by the crankshaft set, and the crankshaft set and the crankshaft working condition equivalent assembly are both installed on the installation platform. Wherein the crankshaft group is formed by modularizing more than one crankshaft; the device can truly simulate the working condition of the crankshaft system in the internal combustion engine, and meets the equivalence requirement.

The invention relates to the technical field of agriculture, and provides a salinized soil water and fertilizer strategy acquisition method and system, a storage medium and electronic equipment, and the method comprises the steps: obtaining a preset value of soil conductivity used for representing the soil salinization degree at a preset time point, and determining a target value of each parameter associated with soil salinization at the preset time point; and inputting the preset value and all the target values into a trained reverse residual neural network to obtain a salinized soil water and fertilizer strategy corresponding to the soil with the soil conductivity being the preset value. The constructed reverse residual neural network can better fit an actual application scene of irrigation and water conservancy, the reverse residual neural network can directly simulate and optimize according to the target soil salinity corresponding to the preset value of the soil conductivity to obtain a salinized soil water and fertilizer strategy, the model precision is high, the simulation requirement can be met, a powerful technical means is provided for optimizing a field irrigation and fertilization strategy, and the analysis efficiency is improved.

The invention provides a universal radio radar and target signal simulator and a using method thereof. The simulator is composed of three parts of video combination, radio frequency combination and control combination. The radio frequency combination part is used for generating three paths of carrier frequency signals of irradiation straight waves, echo waves and clutters for simulating differentradio homing devices; the video combination part is used for generating analog video signals of different wireless homing devices, and modulating the video signals to carrier frequency signals to generate three paths of radio frequency signals of analog irradiation straight waves, echoes and clutters; the control combination part controls the radio frequency combination part and the video combination part to generate signals of corresponding parameters and modulation characteristics between the signals through man-machine conversation or by receiving an analog control instruction from an uppercomputer. The simulator has the advantages that the combination mode in the video combination, the radio frequency combination and the control combination is optimized, so that the simulator can meetthe simulation requirements of radars and target signals of radio homing devices with various homing modes and various models.

The invention discloses a laser three-dimensional forming closed-loop simulation method. The simulation method is different from a common thermal coupling model. The constant laser power is simply adopted in the whole simulation process; the laser power of the next molten pool is continuously and dynamically adjusted based on the technological characteristics of laser three-dimensional forming, and compared with an existing laser three-dimensional forming thermal coupling model, the finite element optimization modeling method based on temperature closed-loop control better conforms to the objective law of the actual forming process. The optimization model more suitable for the real machining process can inevitably and more accurately reveal the thermal-force field evolution law and the coupling mechanism thereof, and a scientific criterion is provided for relieving laser three-dimensional forming stress and deformation.

The invention discloses a design method and system for an unmanned ship cluster simulation environment. The method comprises the following steps: constructing a cluster comprising a plurality of virtual unmanned ships by using a hardware virtualization technology; receiving a sensor type configured for the unmanned ship by a user; configuring corresponding sensor data for each unmanned ship; receiving a power control instruction of each unmanned ship; and inputting the power control instruction into a pre-constructed mathematical model, calculating the position of each unmanned ship at the next moment, and simulating the navigation of the unmanned ship. According to the technical scheme, a frame foundation is provided for building a simulation environment of the unmanned ship, and the simulation requirement of an unmanned ship system carrying multiple sensors in a complex environment is met.

The invention provides a data processing method and device for a virtual signal network. For an upper computer, a plurality of acquisition devices and a plurality of restoration devices in a virtual signal network, an engineering conversion module can be arranged in each acquisition device and each restoration device; the engineering conversion module comprises a conversion function, and the conversion function comprises a group of parameters to be configured. Further, a first parameter of a first engineering quantity conversion module set in a target acquisition device corresponding to the simulation task and a second parameter of a second engineering quantity conversion module set in a target restoration device corresponding to the simulation task are configured through an upper computer based on the simulation task under the current working condition; and finally, engineering quantity conversion between the target acquisition equipment and the target restoration equipment is realized through the first engineering quantity conversion module configured with the first parameter and the second engineering quantity conversion module configured with the second parameter.

The invention discloses a GaN HEMT scaling model circuit topological structure, which is characterized in that a grid electrode G, a source electrode S and a drain electrode D of a transistor GH1 arerespectively connected with positive electrodes of direct-current power supplies VG, VS and VD; a grid electrode G, a source electrode S and a drain electrode D of the transistor GH2 are respectivelyconnected with one end of the inductor L2, one end of the inductor L1 and one end of the inductor L3; the other end of the inductor L2 is connected with the positive electrode of a direct-current power supply Vgs; the other end of the inductor L1 is connected with the negative electrode of the direct-current power supply V0; the other end of the inductor L3 is connected with the positive electrodeof a direct-current power supply Vds; wherein the source electrode S and the drain electrode D of the transistor GH2 are also connected with the two ends of the meter-based current source. Accordingto the GaN HEMT scaling model circuit topological structure disclosed by the invention, the problems of model precision and ductility can be solved, and the temperature change characteristic is met atthe same time, so that higher model precision is achieved, and the circuit simulation requirement is met.