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Articles 3871 - 3900 of 4223
Full-Text Articles in Systems Science
A Practical Approach For Building The Model Family’S Framework Of A Simulation System, Xiaocheng Liu, Bin Chen, Xiaogang Qiu
A Practical Approach For Building The Model Family’S Framework Of A Simulation System, Xiaocheng Liu, Bin Chen, Xiaogang Qiu
Journal of System Simulation
Abstract: The model architecture of a simulation system is derived from its family’s framework, and the building approach is the first issue to be tackled to build a simulation system. Considering the experience for building model family’s framework of some typical simulation systems and the recent development of modeling technology, this paper gives a measure-centred guidable procedure for building the model family’s framework of a simulation system, summarizes its basic rules, as well as lists some key technologies and supporting tools. The approach describes step-by-step the process of framework building by two phases (eight steps). Our proposed approach has been …
Edge-Side Simulation Method And Framework Based On Micro-Services, Yanlong Zhai, Wenxin Sun, Tianhong Bao, Yang Kai, Duzheng Qing
Edge-Side Simulation Method And Framework Based On Micro-Services, Yanlong Zhai, Wenxin Sun, Tianhong Bao, Yang Kai, Duzheng Qing
Journal of System Simulation
Abstract: Aiming at the multi-devices, big data and low-latency simulation requirements in the Internet of Things, we define a concept of edge-side simulation and a simulation mode based on micro-services referring to the computational characteristics and architecture of edge computing and fog computing. For the link constraint and high-latency processing defects of "cloud simulation", a lightweight edge-side simulation platform framework combining edge computing and fog computing is designed, and the simulation speed is further accelerated by real-time simulation with LVC simulation system. Compared with the existing simulation frameworks, the edge-side simulation framework has the remarkable features of lightweight, high real-time, …
Research On Battle Damage Assessment Method Of Aggregating Target In Theater-Level, Qihao Hou, Yiping Yao, Cao Xiang
Research On Battle Damage Assessment Method Of Aggregating Target In Theater-Level, Qihao Hou, Yiping Yao, Cao Xiang
Journal of System Simulation
Abstract: The damage adjudication model in the theater-level combat simulation is the key to judge the target damage status and evaluate the attack process. The current research mainly focuses on the abstract modeling of single ground target, and the needs of the damage assessment of ground aggregation targets in large-scale joint operations cannot be met. The ground aggregation target is decomposed into different sub-targets through the structure tree, and the sub-target value is given to determine the main attacked target. Standard sub-targets are created based on the sub-target's shape and presence or absence of protection. The mapping relationship between …
Volume Rendering Viewpoint Selection Based On Adaptive Scaleable Chaotic Particle Swarm Optimization, Yanyang Zeng, Zehao Zhang, Yunxia Feng
Volume Rendering Viewpoint Selection Based On Adaptive Scaleable Chaotic Particle Swarm Optimization, Yanyang Zeng, Zehao Zhang, Yunxia Feng
Journal of System Simulation
Abstract: People often perform volume rendering viewpoint selection by means of manual exploration. However, when the volume data is large, it often takes a lot of time to reduce the efficiency. An adaptive scaling chaotic particle swarm optimization algorithm is proposed for the automatic selection of viewpoints in volume rendering. The algorithm introduces image information entropy to evaluate the quality of images corresponding at different viewpoints. The entropy value is used as the basis for optimizing the viewpoint and the fitness value of the particle swarm optimization, so as to realize the intelligent and automatic choice, and finally obtain the …
Research Of Analysis Method Of Presenters’ Reputation Record, Zhiyong Yu, Wang Na, Niu Kan, Jindong Wang
Research Of Analysis Method Of Presenters’ Reputation Record, Zhiyong Yu, Wang Na, Niu Kan, Jindong Wang
Journal of System Simulation
Abstract: In order to satisfy the requirement of service presenters’ credibility from recommendation system, this paper put forward a method based on the analysis of reputation record to find the most credible presenters. The preference similarity between different users is calculated with users’ preference vectors. The relevance of the fields, recommendation response rate and recommendation satisfaction rate are then calculated to filter the presenters. The presenters’ current reputation is calculated by introducing the penalty factor. We filter the presenters’ reputation record with localized changes and tendentious changes and calculate the skewness coefficient and kurtosis coefficient of the reputation records …
Visualized Parameter-Tuned Algorithm For Control Loading System, Xie Chen, Shuchu Zhang, Zhenyu Sun
Visualized Parameter-Tuned Algorithm For Control Loading System, Xie Chen, Shuchu Zhang, Zhenyu Sun
Journal of System Simulation
Abstract: To improve the fidelity of flight simulators, a control loading system is introduced in this paper which has the most direct effect on the pilot's intuitive perception. The overall design, hardware construction and digital simulation results of the system are given. In the process of system realization, the visual displacement-force loading configuration scheme is adopted to solve such problems as requirement changes or parameter excursions in hardware. The algorithm of output waveform curve adjustment based on cubic spline interpolation is proposed and the parameters are adjusted according to demand through graphical operation interface by maintenance personnel. The traditional method …
Development History And Case Study Of Interoperability Between Us Combat Simulation And C2 Systems, Xiangzhong Xu, Zaijiang Tang, Yaxin Tan
Development History And Case Study Of Interoperability Between Us Combat Simulation And C2 Systems, Xiangzhong Xu, Zaijiang Tang, Yaxin Tan
Journal of System Simulation
Abstract: The analysis of heterogeneity between U.S. combat simulation and command & control (C2) systems is carried out. The roadmap, its main development stage and main tendency of interoperability between US combat simulation and C2 systems are also analyzed. Two case studies, Viz., the Naval Simulation System/the Global Command and Control - Maritime (NSS/GCCS-M) Federation and C4I Team Training System (CTTS) are conducted, which are representatives of bidirectional interfaces and embedded interoperability respectively. The main measures such as ensuring interoperability which is a shared responsibility between the M&S and C2 communities, long-term plan and coordination are beneficial to the promotion …
Research On Assessment Of Operation System‘S Resilience Based On Test Bed, Rong Ming, Xiaofeng Hu, Jingyu Yang
Research On Assessment Of Operation System‘S Resilience Based On Test Bed, Rong Ming, Xiaofeng Hu, Jingyu Yang
Journal of System Simulation
Abstract: The warfare under the information condition is the System of Systems (SOS) combat. The resilience of SOS is the ability to support the functions necessary for mission success with higher probability, shorter periods of reduced capability, and across a wider range of scenarios, conditions, and threats, in spite of hostile action or adverse conditions. It has gradually become a focus in developed countries. The problems of SOS resilience evaluation are analyzed and a analysis method under test bed simulation is constructed. By meaning of integrity,dynamic and confrontation, we propose resilience assessment models to evaluate resilience by competitive game and …
Multi-Stage Filtering Method For Pedestrian Navigation And Location, Zhidan Gu, Li Qing, Zhao Hui
Multi-Stage Filtering Method For Pedestrian Navigation And Location, Zhidan Gu, Li Qing, Zhao Hui
Journal of System Simulation
Abstract: In the process of navigation and location of a pedestrian for a wearable IMU, the inertial device generates an accumulated drift error affecting the navigation and location accuracy of pedestrian navigation. A multi-stage filtering method is studied: after the zero-speed detection and the zero-speed correction based on Extended Kalman Filter are carried out, the vector domain is divided by the indoor geometric layout features, and the projected matching model is used to determine the optimal coordinates of the nodes to get the trajectory. Using the self-developed MIMU pedestrian navigation module, a field experiment was conducted. The experimental results show …
Numerical Simulation Of Shock Wave Effect On Damaged Upper And Lower Adjacent Structures Of Ships, Run Miao, Weili Wang, Hongjie Liu, Shiyong Wu, Zeng Liang
Numerical Simulation Of Shock Wave Effect On Damaged Upper And Lower Adjacent Structures Of Ships, Run Miao, Weili Wang, Hongjie Liu, Shiyong Wu, Zeng Liang
Journal of System Simulation
Abstract: The damage effect of shock wave on the upper and lower adjacent cabin structure of small warship is studied. LS-DYNA finite element analysis software is used. Damage modes of upper and lower adjacent cabin structures under dynamic and static explosion are analyzed. Cabin damage under different charging speeds is calculated. The results show that in the dynamic explosion state, there is a big difference between the shock wave field and the static explosion, which causes different modes of bulkhead damage. When the explosive happens in the lower cabin, the upper cabin bulkhead is extruded by the deformation of the …
Penetrating Capability Of Different Annular Shaped Charge Warhead, Tan Bo, Hongjie Liu, Run Miao, Zeng Liang
Penetrating Capability Of Different Annular Shaped Charge Warhead, Tan Bo, Hongjie Liu, Run Miao, Zeng Liang
Journal of System Simulation
Abstract: On the basis of the existing missile warhead, an annular shaped charge is added in the front of warhead without changing the size and increasing the weight of the warhead. ANSYS/LS-DYNA is used to simulate the whole process of the formation of annular jet and penetration of a double target and analyze the movement characteristics of two kinds of different annular jet in the air. The target damage effect is acquired. The calculation results show that the difference of the penetration ability on the double layer target of jet between center -ball shaped charge and that of the hollow …
Research On Construction Method Of Data-Driven Equipment Effectiveness Evaluation Model, Yingbo Lu, Xiaochao Qian, Chen Wei, He Shu, Zhifeng Lu
Research On Construction Method Of Data-Driven Equipment Effectiveness Evaluation Model, Yingbo Lu, Xiaochao Qian, Chen Wei, He Shu, Zhifeng Lu
Journal of System Simulation
Abstract: The problem of weapon equipment effectiveness evaluation is complex and nonlinear. However, the analytical method cannot empower evaluation index objectively or establish the mathematical model accurately. This paper proposes a data-driven evaluation model construction method. We introduce meta-model technology like GA-BP algorithm to construct effectiveness evaluation model, which can mine relationships and weights between indicators objectively. We take the interception effectiveness evaluation of a certain type of air defense missile weapon system as an example to verify the feasibility of this method. The method is helpful to optimize technical indicators and predict effectiveness rapidly.
Simulation Of Influence Of Coal-Based Industry On Water Resources Bearing System, Yalin Chen, Wangsheng Gui, Qianjin Dong, Ye Chun, Haotian Wu
Simulation Of Influence Of Coal-Based Industry On Water Resources Bearing System, Yalin Chen, Wangsheng Gui, Qianjin Dong, Ye Chun, Haotian Wu
Journal of System Simulation
Abstract: The contradictory spatial distribution between China's coal resources and water resources has become the stress to sustainable development of regional ecological environment and social economy. The paper presents interactive simulation model of regional water resources bearing system based on System Dynamics; and then Ningxia Hui Autonomous Region is used as an example, the dynamic process of local water bearing system was simulated under different scenarios of planning. The simulation results show that regional sustainable development of water resources would be achieved if the resources are allocated based on the market, while the gap between supply and demand of regional …
Multi-Algorithm And Multi-Population Co-Optimization Differential Evolution Algorithm, Jinghua Zhang, Han Pu
Multi-Algorithm And Multi-Population Co-Optimization Differential Evolution Algorithm, Jinghua Zhang, Han Pu
Journal of System Simulation
Abstract: Algorithm fusion or co-evolutionary with multi populations are the solutions for complex engineering application. A multi-algorithm and multi-population collaborative optimization algorithm is proposed by differential evolution (DE) algorithm, which pays emphasis on algorithm selection and combination. The algorithm designs a parameter-adaptive DE algorithm and selects three different DE algorithm variants which is complementary for each other and provides a multi-population co-optimization scheme according to four algorithms characters. Stimulation results show that the proposed algorithm could make four different algorithms remedy for each other, gets a better result, and raises the precision, reliability and suitability, which reduces algorithm selection difficulty …
Detailed Enhancement Of Forward Vehicle Video Images Based On Structured Forest, Weidong Jin, Yanhua Hu, Tang Peng, Li Wei
Detailed Enhancement Of Forward Vehicle Video Images Based On Structured Forest, Weidong Jin, Yanhua Hu, Tang Peng, Li Wei
Journal of System Simulation
Abstract: In view of the complexity of existing image enhancement methods, which cannot highlight the detection target, this paper proposes a method for detail enhancement of forward vehicle video based on structured forest. This method is mainly divided into two parts: structured forest edge detection and visual enhancement. This paper implements the detail edge extraction and enhancement of the patrolling image of the catenary. The gray histogram distribution after processing is more balanced, and the difference between the average values of gray levels in the detail area and background area of the enhanced patrol image is the standard deviation. The …
Prediction Model For Breakdown Voltage Of Transformer Oil Based On Relative Transformation And Kernel Principal Component Analysis, Yinguo Xiong
Journal of System Simulation
Abstract: Aiming at the difficulty of measuring the breakdown voltage of transformer oil on line, a new prediction model for breakdown voltage of transformer oil is proposed based on relative transformation (RT) and kernel principal component analysis (KPCA). By analyzing the factors that are closely related to the breakdown voltage, the original data space is converted to the relative data space by relative transformation to improve the distinguishability between data. KPCA is employed in the relative space for the purpose of data dimension reduction, denoising and extracting nonlinear features. Kernel principal components extracted by KPCA are used as the input …
Simulation And Analysis Of Blasting Effect For Multi-Core Tube-Hollow-High-Rise Building, Tiejun Cui, Shasha Li, Laigui Wang
Simulation And Analysis Of Blasting Effect For Multi-Core Tube-Hollow-High-Rise Building, Tiejun Cui, Shasha Li, Laigui Wang
Journal of System Simulation
Abstract: In order to study the complex high-rise building structure collapse process and effect of blasting, the blasting simulation of building containing multi-core tube and hollow structure are performed. Simulation building has hollow-four core tube-frame structure and the core tube throughout the whole building. Particle flow method is used to model the building, and blasting simulation is implemented using the blast algorithm based on particle flow. According to the structure characteristics and the distance of core tube and architecture center, the implementation of blasting is three groups design. The processes of blasting and the blasting results are analyzed. Results show …
Simulation Of Transient Temperature Field Of Current-Carrying Sliding Friction Pair, Fengyi Guo, Hongxin Gao, Liu Shuai, Zhiyong Wang, Zhang Kai, Aijun Wang
Simulation Of Transient Temperature Field Of Current-Carrying Sliding Friction Pair, Fengyi Guo, Hongxin Gao, Liu Shuai, Zhiyong Wang, Zhang Kai, Aijun Wang
Journal of System Simulation
Abstract: The transient temperature rise of pantograph and catenary system could affect material properties of the friction pair, which accelerates the wear of system. In order to reduce the wear caused by temperature, transient temperature and distribution of copper/copper-carbon friction pair are studied. A simulation model is established by using COMSOL Multiphysics software. Model effectiveness is verified with temperature experiments. The transient process of temperature field is studied by simulation. The results show that the temperature rise of carbon plate has small cyclical peaks. The highest temperature appears on the contact region in the initial stage of running. Temperature gradient …
Study On Stability Of Bbmc Under Voltage And Current Control Mode, Xiaoping Zhang, Xiaoqiu Li, Wu Zhi
Study On Stability Of Bbmc Under Voltage And Current Control Mode, Xiaoping Zhang, Xiaoqiu Li, Wu Zhi
Journal of System Simulation
Abstract: In the paper, the stability of Buck-Boost matrix converter in voltage/current control mode is studied, and a nonlinear modeling and analysis method on the Buck-Boost matrix converter is proposed. The discrete iterative nonlinear mapping model of the converter is established. The influence of voltage feedback coefficient K1 and current proportional coefficient K2 on system stability is analyzed by sampling the distribution map of output voltage, hence, the stable domain of K1-K2 is determined. The influence on converter stability is verified and analyzed by the time domain waveform, the stroboscopic sampling chart and the …
Research On Fjsp Problem Of Invasive Weed Optimization Based On Hybrid Strategy, Li Ke, Wang Yan, Zhicheng Ji
Research On Fjsp Problem Of Invasive Weed Optimization Based On Hybrid Strategy, Li Ke, Wang Yan, Zhicheng Ji
Journal of System Simulation
Abstract: To solve the flexible job-shop scheduling problem more effectively, an improved invasive weed algorithm was proposed. A random key encoding scheme based on transformed sequences was proposed and an adaptive Gauss mutation operator was introduced to diversity the population in the process of weed breeding. In spatial diffusion stage, the standard deviation of normal distribution based on tangent function was used as seed’s new step size search method. In competition of invasive weed stage, by using the guided search strategy in the bee colony algorithm, the weed was guided to improve its ability to jump out of the …
Multi-Tasks Channel Selection Algorithmic Modeling Based On Svm-Rfe, Jiankui Feng, Jin Jing, Wang Bei, Yugang Niu, Xingyu Wang
Multi-Tasks Channel Selection Algorithmic Modeling Based On Svm-Rfe, Jiankui Feng, Jin Jing, Wang Bei, Yugang Niu, Xingyu Wang
Journal of System Simulation
Abstract: Channel selection is used to locate the mental task related brain area in the brain computer interface systems. In the previous studies, the channels were selected based on the data recoded from the multi-mental tasks. However, the different mental tasks are corresponding to the different brain area. If one same brain area is selected for different mental tasks, the features of one mental task would be noises of another mental task. In this paper, a new method was presented to solve this problem based on the data of motor imagery tasks. The SVM-RFE method was used to select the …
Evaluation Of Contribution Of Army Combined Arms In All-Domains Weapon System-Of-Systems Based On Critical Capability, Xiaochao Qian, Tang Wei, Chen Wei, Yingbo Lu, Zhifeng Lu
Evaluation Of Contribution Of Army Combined Arms In All-Domains Weapon System-Of-Systems Based On Critical Capability, Xiaochao Qian, Tang Wei, Chen Wei, Yingbo Lu, Zhifeng Lu
Journal of System Simulation
Abstract: To support equipment development demonstration of the army combined arms in all-domains weapon system-of-systems, an evaluate method of weapon system-of-systems contribution based on critical capability is studied. The critical capability of the army combined arms in all-domains weapon system-of-systems is analyzed based on the operational mission. A specified scenario of the army combined arms in all-domains weapon system-of-systems is given and the simulation system is constructed. The evaluation index systems and computation model of efficiency of the army combined arms in all-domains weapon system-of-systems are established under the specified scenario. The evaluation result can support the development demonstration …
Modeling, Simulation And Realization Of Writing System Based On Bci Technology, Chen Chao, Ping Yao, Bin Hao, Xu Rui
Modeling, Simulation And Realization Of Writing System Based On Bci Technology, Chen Chao, Ping Yao, Bin Hao, Xu Rui
Journal of System Simulation
Abstract: In order to solve the problem of insufficient information transmission and interaction between organisms and electromechanical devices in the integrated system of vital electricity, Emotiv EPOC and mechanical arm of eeg acquisition equipment were used to build a writing system based on brain-computer interface technology with faster information transmission rate The system modeling and simulation were conducted. In the system modeling, the frequency identification of steady-state visual evoked potential was carried out by a combination of bandpass filtering and Canonical Correlation Analysis algorithm, and the accuracy rate of the four classifications was as high as 91.6%. In the online …
Think Of The Dynamic Data Driven Application Systems In Simulation: From Physics Domain To Social Domain, Bin Chen, Yiping Wang, Xiaogang Qiu, Liu Liang, Ma Liang
Think Of The Dynamic Data Driven Application Systems In Simulation: From Physics Domain To Social Domain, Bin Chen, Yiping Wang, Xiaogang Qiu, Liu Liang, Ma Liang
Journal of System Simulation
Abstract: Dynamic data driven application systems (DDDAS) is an important part in the intelligent ACP based experimental approach. With the development of information technologies such as big data, intelligent learning, game play theory, the modes of application of DDDAS in simulation cases have changed a lot. In order to meet the requirements of the researches in both physics domain and social domain, the applications of DDDAS in classical cases are summarized. The data assimilation in the two physics cases is illustrated in detail. Then the cases in social domain which is focused by safety science are also discussed. The …
Uncertainty Quantification Method For Aircraft Using Pce Model, Liu Bo, Xiaobing Shang, Chao Tao, Ping Ma, Yang Ming
Uncertainty Quantification Method For Aircraft Using Pce Model, Liu Bo, Xiaobing Shang, Chao Tao, Ping Ma, Yang Ming
Journal of System Simulation
Abstract: In order to study uncertainty quantification of aircraft, which has the characteristics of many uncertainty parameters, complex model structures, and so on, an uncertainty quantification method based on polynomial chaos expansion is proposed. A method based on multi-dimensional polynomial chaos expansion (PCE) is used as an agent model to approximate aircraft so as to reduce the amount of calculation of transmitting by the vehicle dynamic system from uncertainty parameters. The Sobol index of the global sensitivity is calculated based on the approximate agent model. An example is presented to demonstrate the effectiveness of the polynomial chaos expansion method …
Computational Model And Analysis Of Parachute’S Opening Load In Rocket Sled Experiments, Conglei Wang
Computational Model And Analysis Of Parachute’S Opening Load In Rocket Sled Experiments, Conglei Wang
Journal of System Simulation
Abstract: The multi-bodies method with mass-spring damper model is used to analyze the parachute opening load in the rocket sled experiments. Results show that the computational model can be used to predict the opening load variation in rocket sled experiments. The computed maximum value and moment of opening load agree well with the experiment data. At the same time, the influences of fore-body mass and deploy velocity on the inflation load are analyzed. The analysis shows that in the range of 200~450 km/h, the peak value of the inflation load increases with the increase of the deploy velocity, and …
Facial Feature Points Tracking System And Simulation Analysis, Mingze Yuan, Shihong Xia
Facial Feature Points Tracking System And Simulation Analysis, Mingze Yuan, Shihong Xia
Journal of System Simulation
Abstract: Obtaining facial feature points from images are one of the fundamental research issues in computer vision and graphics. At present, most of face alignment methods obtain the position information of face feature points from a single static picture, i.e., a single still picture detection. Although these methods have obtained relatively accurate detection results, in the detection of feature points of continuous picture sequences, the feature point jitter may occur due to environmental changes such as illumination and background. Therefore, an embedded tracking system for a human face feature points is constructed using a tracking-based method for acquiring facial feature …
Cloud Job Scheduling Model Based On Improved Plant Growth Algorithm, Li Qiang, Xiaofeng Liu
Cloud Job Scheduling Model Based On Improved Plant Growth Algorithm, Li Qiang, Xiaofeng Liu
Journal of System Simulation
Abstract: The performance of cloud job scheduling algorithm has a great importance to the whole cloud system. The key factors that affect cloud operation scheduling are found out, and a resource constraint model is established. The existing simulation plant growth algorithm is improved based on the Logistic model of plant growth law, so that the plant growth way was made to change according to the energy power. The comparison of four different plant models was carried out and their different features were analyzed. Compared with 6 typical cloud job scheduling algorithms, it is concluded that the improved simulation plant growth …
Application Tests Of Mudis In Surface Ship Operation Training Simulation System, Xu Jing, Zhengxiang Xiong, Yongsheng Zhang, Xu Ming
Application Tests Of Mudis In Surface Ship Operation Training Simulation System, Xu Jing, Zhengxiang Xiong, Yongsheng Zhang, Xu Ming
Journal of System Simulation
Abstract: To meet the network communication demands of surface ship operation training simulation system, a multi-layer distributed service data interaction RTI was developed, which supported several system frameworks; and the main functions of HLA and DDS standards were realized. The distributed service with multiple key points was adopted; the data with several frequency response mechanisms and intelligent communication methods were provided; and the active analysis of data communication behavior was obtained. It had error-tolerance and adaptive load balancing capabilities. The MuDIS tests on data control, real-time data communication, time advance request delay, error-tolerance performance and so on were carried out …
Simulation-Based Acquisition Platform For Complex Equipment, Huiyang Qu, Yaoqin Zhu, Ruiying Pu, Junhua Zhou, Guoqiang Shi
Simulation-Based Acquisition Platform For Complex Equipment, Huiyang Qu, Yaoqin Zhu, Ruiying Pu, Junhua Zhou, Guoqiang Shi
Journal of System Simulation
Abstract: Based on the architecture of the simulation-based acquisition platform and the integrated modeling technology, the modeling and simulation technology based on virtual prototype is described. The modeling and simulation techniques for reliability, maintainability and supportability, and for the acquisition project management across the life-cycle are elaborated. Based on an aerospace complex equipment acquisition project, the application of the simulation-based acquisition platform in the aerospace equipment demonstration, development and support phase is introduced.