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61results about How to "Improve design and development efficiency" patented technology

Differential evolution algorithm based multi-layer frequency selection surface composite wave-absorbing structure and material optimum design method

The invention discloses a differential evolution algorithm based multi-layer frequency selection surface composite wave-absorbing structure and material optimum design method. The method includes: performing mutation and crossover operations by the aid of the different evolution algorithm; subjecting the composite structure to modeling calculation by the aid of electromagnetic simulation software and feeding back calculated results to a program to complete the operations; searching and generating an optimum model reaching the objective function and optimal structure parameters and material materials in variant fields. By the differential evolution algorithm based multi-layer frequency selection surface composite wave-absorbing structure and material, the model can be optimized in structure parameters, and a new material with the optimal ratio can be obtained through the differential evolution algorithm according to an original absorber and the electromagnetic parameters on the substrate. The optimum design method has the advantages that design cycle is short, and the composite wave-absorbing structure and material low in reflection coefficient, wide in frequency band and thin in thickness can be obtained rapidly.
Owner:BEIJING UNIV OF TECH

Scientific research project life cycle data management customization control method and system based on quantification DMP

The invention relates to a scientific research project life cycle data management customization control method and system based on a quantification DMP. According to the method, first, a model and a standard for scientific research project life cycle data management are established, and then content of a data management plan DMP is quantified based on the established model and standard; protocol control function points and trigger conditions of scientific research project life cycle data management are generalized in a classified mode according to a metadata standard of the quantification DMP in combination with a function control demand; and the corresponding protocol control function points are triggered according to the trigger conditions, then protocol control demands are submitted to a data management protocol control engine for centralized processing, and control realization of corresponding functions is completed through protocol control logic judgment. In this way, decoupling of data management system protocol control functions and quantification DMP metadata element settings is realized, the efficiency of design and development of a scientific research project life cycle data management system is greatly improved, and high customizability and high reusability of the system are enhanced.
Owner:COMP NETWORK INFORMATION CENT CHINESE ACADEMY OF SCI

Logic comprehensive control method and device

The invention discloses a logic comprehensive control method and device. The logic comprehensive control method comprises the steps of detecting whether an initial value of a memory in a read RTL design file is changed or not; when the detection result is yes, according to a pre-established mapping relationship, correspondingly modifying an initial value of a memory instance in a synthesized netlist obtained by executing logic synthesis operation on the RTL design file most recently so as to update the synthesized netlist, wherein the mapping relationship is used for representing a corresponding relationship between the initial value of the memory in the RTL design file and the initial value of the memory instance in the synthesized netlist obtained by performing logic synthesis operationon the RTL design file last time. Obviously, according to the method, under the condition that the initial value of the memory in the RTL design file is changed, only the initial value of the memory instance in the synthesized netlist needs to be correspondingly modified according to the pre-established mapping relation, logic synthesis does not need to be carried out again, logic synthesis time can be shortened, and the development and design efficiency of the FPGA is improved.
Owner:GOWIN SEMICON CORP LTD

System and method for integrating product design and environment influence evaluation in CAD system environment

The invention provides a system for integrating product design and environment influence evaluation in a CAD system environment. The system comprises a product model importing module which imports a target product model from a CAD system, a product life cycle integrated modeling module which performs characteristic-based product state-process operation modeling to realize life cycle data integrated management, a product environment influence analysis module which is connected with the product life cycle integrated modeling module and performs product life cycle evaluation to generate an environment influence quantitative analysis result, and a product environment influence analysis result output module which is connected with the product environment influence analysis module and displays an environment influence analysis result in multiple forms. Meanwhile, the invention provides an integrating method of the integrating system. According to the system and method, integrated management of product design information and process design information is realized, product concurrent development is supported, and product design and development efficiency is improved; and integration of product design and environment influence evaluation is favorable for design and development of environment-friendly products.
Owner:SHANGHAI JIAO TONG UNIV

Component partitioning simulation method based on lunar probe landing mechanical environment prefiguration

The invention relates to a component partitioning simulation method based on lunar probe landing mechanical environment prefiguration, belonging to the technical field of deep space exploration. The invention provides a reasonable component partitioning simulation method based on the requirement of lunar probe landing mechanical environment prefiguration. The method can orderly and efficiently carry out the work of finite element analysis and provide convenience for the subsequent work of mechanical environment prefiguration, so that the defect that finite element modeling of a complex aerospace structure is tedious and fallible is avoided, and integrated analysis of component partitioning, finite element analysis and mechanical environment prefiguration is achieved. According to the component portioning simulation method, component partitioning can be carried out on a complex lunar probe according to the requirement of lunar probe landing mechanical environment prefiguration, so that the obtained result can be orderly stored; furthermore, modeling component partitioning keeps consistence with component partitioning required by mechanical environment prefiguration analysis, so that the problem of disordered result file management is avoided.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY

Calcium carbonate filled composite material design method based on BP neural network

The invention discloses a design method of a calcium carbonate filled composite material based on a BP neural network. The design method comprises the following steps: preparing a test sample; testing mechanical property parameters; generating a representative volume unit, and calculating a three-dimensional box dimension; collecting various different filling process parameters and corresponding mechanical property indexes, and sorting into a data set; carrying out BP neural network system modeling; optimizing the initial BP neural network by adopting a GA (Genetic Algorithm), and training the model by utilizing a training set in the data set; calculating an error percentage; the BP neural network model can be used for process design and performance prediction of the calcium carbonate filled composite material. According to the method, the defect that a two-dimensional image is difficult to reflect representative volume unit structure characteristics under different filling process parameters can be overcome, the filling process parameters of the calcium carbonate powder filled polymer-based composite material are scientifically designed, the design, research and development efficiency of the calcium carbonate powder filled polymer-based composite material is improved, and the research and development period can be shortened to half.
Owner:HEZHOU UNIV

Structure-based fine simulation method for high-pressure water supply heater in nuclear power plant

The invention provides a structure-based fine simulation method for a high-pressure water supply heater in a nuclear power plant. The high-pressure water supply heater in the nuclear power plant is divided into eight sub-model areas according to an actual physical structure, and the steam condensation area and the drainage cooling area in the sub-model areas are divided into a plurality of segments in a more detailed mode according to the actual pipe row and partition forms; simulation sub-module programs of the areas are established correspondingly according to the heat transfer and flowing characteristics in the segments; model input parameters are combined, and checking, feedback and correcting are conducted; and combination and dispatching are conducted through a main program to generate a corresponding calculation sequence and a calling sequence, and thus a structure-based fine simulation model of the high-pressure water supply heater in the nuclear power plant is built. The structure-based fine simulation method does not need to depend on the specific parameters of any high-pressure water supply heater equipment in the nuclear power plant, can be applied to the high-pressurewater supply heater equipment with the various parameters and forms in the nuclear power plants under general conditions, and has good universality.
Owner:HARBIN ENG UNIV

Steel-making continuous casting intrusive flow nozzle and numerical simulation method thereof

InactiveCN108920821AReduce the risk of water accumulation in the mouthIncrease the frequency of continuous pouringDesign optimisation/simulationSpecial data processing applicationsGeometric designNarrow face
The invention discloses a steel-making continuous casting intrusive flow nozzle which includes a flow nozzle body. The flow nozzle body is cylindrical and is internally provided with a cylindrical inner chamber, the open end of the cylindrical inner chamber is a flow nozzle inlet, the closed end of the cylindrical inner chamber is a flow nozzle bottom, the side wall of the flow nozzle bottom is provided with a flow nozzle outlet, and the ratio of the height of the flow nozzle outlet on the side wall of the flow nozzle body and the width of the flow nozzle outlet on the side wall of the flow nozzle body is smaller than 1. A numerical simulation method for the intrusive flow nozzle is also disclosed. First the prototype-based intrusive flow nozzle and a model of a crystallizer are established using simulation platform numerical simulation software ANSYS, and flow field numerical simulation is performed; a geometric design of the intrusive flow nozzle is changed on the basis of the prototype numerical simulation, and the modified intrusive flow nozzle is subjected to numerical simulation; finally a molten steel backflow region of the flow nozzle outlet, crystallizer liquid level fluctuation and crystallizer narrow face molten steel flow velocity and other numerical simulation results are finally analyzed, and data supporting is provided for design development of the flow nozzle.
Owner:MAANSHAN IRON & STEEL CO LTD

Ceramic injection mould optimal design method and ceramic injection mould

The invention discloses a ceramic injection mould optimal design method and a ceramic injection mould. The optimal design method includes the following steps that a required ceramic injection mould model is designed through mould design software to serve as an original ceramic injection mould needing to be optimized; a 3D mould model of the original ceramic injection mould is guided out and guided into simulation software; an initial injection moudling channel allowing injection moulding materials to flow into a cavity is built in the 3D model; the 3D model is subjected to ceramic injection moulding forming process simulation through simulation software, and the difference of injection moudling time required by injection moulding of two ceramic products is recorded; whether the injection moulding time is within a preset time range is judged, and the injection moulding channel built in the original ceramic injection mould is improved till injection moulding time difference is within a preset time range. The software is used for injection moulding process simulation, cost in the mould development process is greatly reduced, and mould development and design efficiency is improved. The precision and the quality of the ceramic products are guaranteed, and meanwhile waste of ceramic materials is reduced.
Owner:SHENZHEN SUNTECH ADVANCED CERAMICS

Car ecu key emulation implementation method and its system and verification method

The invention relates to an automobile electronic control unit (ECU) secret key simulation implementation method, a system and a verification method thereof. The automobile ECU secret key simulation implementation method includes that an automobile ECU simulation operating model is constructed and operated in a computer, an encryption unit is connected with the computer in a communication mode, the encryption unit has the same encryption processing business rules with an encryption control which is used for generating a secret key in the automobile ECU, an automobile diagnostic apparatus is connected with the computer and a vehicle-mounted bus in a communication mode, required safety algorithm numbers are set by the automobile diagnostic apparatus, a signal request seed numbers are transmitted to the simulation operating model by the automobile diagnostic apparatus, the safety algorithm numbers and the seed numbers back fed and output from the simulation operating model are transmitted to the encryption unit so that the encryption unit can generate the secret key relevant to the safety algorithm numbers and the seed numbers, and a communication with the encryption unit is performed for an analysis to obtain the secret key. The automobile ECU secret key simulation implementation method, the system and the verification method thereof have the advantages that the development design efficiency is high, the usage is reliable, the application is convenient and fast, the cost is saved, debugging workload and difficulties are remarkably reduced, and the like.
Owner:SAIC GENERAL MOTORS +1

Evaluation method of automobile ground line design scheme

The invention relates to an automobile model development technology, in particular to an evaluation method of an automobile ground line design scheme. The evaluation method of the automobile ground line design scheme according to one embodiment comprises the following steps: obtaining ground line data by a ground line design input parameter, finished automobile load and a suspension rigidity parameter; obtaining a chassis part index and a finished automobile index of an automobile by the ground line data; scoring the chassis part index and the finished automobile index; according to an evaluation result, determining whether the chassis part index and the finished automobile index pass a preliminary design or not, if the chassis part index and the finished automobile index pass the preliminary design, generating a ground line preliminary design mathematic model, otherwise, revising the finished automobile load or the suspension rigidity parameter, and returning back to the step of obtaining the ground line data; measuring an automobile structure parameter by the ground line preliminary design mathematic model; and if the automobile structure parameter conforms to an engineering standard, determining a current ground line preliminary design mathematic model as a final ground line preliminary design mathematic model, otherwise, revising the finished automobile load or the suspension rigidity parameter, and returning back to the step of obtaining the ground line data.
Owner:SAIC GENERAL MOTORS +1

A general online service platform customized evaluation method and system

The present invention relates to a universal online service platform customized assessment method and system. The method includes the following steps that: 1) the universal evaluation index model of an online service platform is established, wherein evaluation indexes include qualitative indexes and quantitative indexes; 2) the qualitative indexes and quantitative indexes are created and set in a customized manner according to the universal evaluation index model; and 3) a universal evaluation index service engine is built, the setting data of the qualitative indexes and quantitative indexes are read through the universal evaluation index service engine, information demonstration and index quantity logic calculation are performed on the qualitative indexes and quantitative indexes, and final results are fed back to evaluation users. The system includes a model establishing module, an evaluation index creation and setting module and an evaluation index service engine. With the universal online service platform customized assessment method and system of the invention adopted, the efficiency of the design and development of an online service evaluation system can be improved, the high customizability and high reusability of the system can be enhanced, and the flexibility and expansibility of the system can be enhanced.
Owner:COMP NETWORK INFORMATION CENT CHINESE ACADEMY OF SCI
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