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An Evacuation Simulation Method Based On Disaster Avoidance Psychology And Disaster Impact, Zhang Han, Liping Zheng, Huang Kang, Haibo Lin 2020 School of Computer Science and Information Engineering, Hefei University of Technology, Hefei 230009, China;

An Evacuation Simulation Method Based On Disaster Avoidance Psychology And Disaster Impact, Zhang Han, Liping Zheng, Huang Kang, Haibo Lin

Journal of System Simulation

Abstract: Evacuating people safely and efficiently during disasters is the important guarantee to public safety, and the effective and feasible evacuation simulation method is theoretically and practically significant. The main methods seldom consider the dynamic evolution of disasters, so a dynamic Evacuation Route Replanning Based on Psychology (DERR) method is proposed. DERR method focuses on the psychological parameters of disaster avoidance of people. According to the change of disasters area, DERR can perform the real time evacuation process by using A* routing algorithm to re-plan and optimize the evacuation path. The simulation experiment shows the evacuation process of this method. …


Structure Learning Of Fuzzy-Tree Based On Rigorous Binary Tree Code And Genetic Algorithm, Changliang Liu, Ziqi Wang 2020 1. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China;;2. School of Control and Computer Engineering, North China Electric Power University, Baoding 071003, China;

Structure Learning Of Fuzzy-Tree Based On Rigorous Binary Tree Code And Genetic Algorithm, Changliang Liu, Ziqi Wang

Journal of System Simulation

Abstract: To solve the problems of information redundancy and low optimization efficiency in the structure learning of fuzzy-tree model, a method based on rigorous binary tree code and genetic algorithm is proposed. The structure of fuzzy-tree model is coded by rigorous binary tree code, which improves the information redundancy of the existing matrix code. Considering the particularity of the code and the convergence of the algorithm, an improved genetic algorithm is proposed to optimize the structure of fuzzy-tree model. The experimental results show that the algorithm has good stability and computing speed on different data sets, and can find a …


Modeling And Simulation For Target Complex Trajectory Of Ballistic Missile, Jiawei Li, Jiang Jing, Chongyang Liu, Binbin Shi 2020 Air Force Early Warning Academy, Wuhan 430019, China;

Modeling And Simulation For Target Complex Trajectory Of Ballistic Missile, Jiawei Li, Jiang Jing, Chongyang Liu, Binbin Shi

Journal of System Simulation

Abstract: Aiming at the complexity and multi-phase process of the trajectory of target complex formed by ballistic missile in space, a phased modeling approach is proposed. Due to the differences of the motion characteristics at different phases, based on the phased modeling thought, the release model of coast decoy in symmetric release structure is established under the corresponding coordinate systems. Under the consideration of several factors: the number, mass, initial state, and vanishing condition, the generation process of multiple batches of boost debris trajectories is designed. The main target trajectory of ballistic missile, decoys release process and multiple batches of …


A Common And Hierarchical Crowd Evacuation Simulation Framework, Haibo Lin, Liping Zheng, Jianwei Wang, Shujie Zhang 2020 School of Computer Science and Information Engineering, Hefei University of Technology, Hefei 230009, China;

A Common And Hierarchical Crowd Evacuation Simulation Framework, Haibo Lin, Liping Zheng, Jianwei Wang, Shujie Zhang

Journal of System Simulation

Abstract: In order to establish a highly scalable platform for crowd evacuation simulation visualization, simulate the crowds in different environments on different population evacuation models, the expansion of crowd simulation systems are explored. By analyzing and improving the existing simulation framework Menge, the level architecture of environment level, strategy level, tactical level, operation level and visualization level are designed, and the expansion interfaces are designed at each level. In user-defined form, the different modules can be added to each level to achieve specific functions. The simulation framework can effectively support users to design and implement various crowd evacuation simulation …


Dynamic Model Of Dual Flux-Controlled Memristor And Fpga Hardware Circuit Realization, Haoqi Chen, Xiaohong Zhang 2020 School of Information Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China;

Dynamic Model Of Dual Flux-Controlled Memristor And Fpga Hardware Circuit Realization, Haoqi Chen, Xiaohong Zhang

Journal of System Simulation

Abstract: Based on the classical Chua’s chaotic circuit, a 5-Dimentional and dual flux-controlled memristive chaotic circuit system is designed. The nonlinear characteristics of the circuit are analyzed numerically and the results show that the circuit has rich chaotic dynamical behavior. The novel memristive continuous system is transformed into digital system by first-order discrete processing. Based on DSP Builder and FPGA technology, a hardware platform of Cyclone Ⅳ E series EP4CE10F17C8N chip realizes the digital system of the model. The design results indicate that the digital memristive system avoids the drift and instability of analog components, the display performance of the …


Credibility Assessment Of Fault Injection Simulation Based On Feature Selective Validation, Li Sheng, Yuxiao Li 2020 School of Science, Jiangxi University of Science and Technology, Ganzhou 341000, China;

Credibility Assessment Of Fault Injection Simulation Based On Feature Selective Validation, Li Sheng, Yuxiao Li

Journal of System Simulation

Abstract: Aiming at the complexity and large number feature details of the data of fault injection simulation which lead to the difficulty for the single indicators or expert visual assessment methods to obtain the accurate assessment results, and the evaluation expert giving the interval complementary judgment matrix on the basis of AHP method which lead to the difficulty for the weights of credibility indicators to be determined, a multi-indicator comprehensive credibility assessment model based on Feature Selection Verification (FSV) is proposed. It can calculate the quantitative credibility values and the qualitative credibility values of the credibility indicators. In order …


An Improved Particle Swarm Optimization Algorithm And Its Application In Clustering Analysis, Chuang Wang, Zhang Yong, Xuegui Li, Hongli Dong 2020 1. Institute of Complex System and Advanced Control Northeast Petroleum University, Daqing 163318, China;;2. Heilongjiang Provincial Key Laboratory of Networking and Intelligent Control; Daqing 163318, China;;

An Improved Particle Swarm Optimization Algorithm And Its Application In Clustering Analysis, Chuang Wang, Zhang Yong, Xuegui Li, Hongli Dong

Journal of System Simulation

Abstract: In this paper, a novel artificial fish swarm particle swarm optimization algorithm (AF-PSO) is proposed corresponding to the shortcomings of the standard particle swarm algorithm including the fast convergence speed in the initial stage, the easiness to fall into premature convergence in the late, the local optimization and the poor ability to global search. This paper firstly introduces the crowding factorδ and the Markov chain, and then adds the artificial fish swarm algorithm to the particle swarm optimization algorithm. By calculating the crowding factor, the velocity model is updated to switch among four modes: foraging, clustering, following and random. …


Research On Quasi-Passive Walking Control Of Biped Robot With Variable Leg Stiffness, Qingqing Wu, Qizhi Zhang, Yali Zhou 2020 Beijing Information Science & Technology University, Beijing 100192, China;

Research On Quasi-Passive Walking Control Of Biped Robot With Variable Leg Stiffness, Qingqing Wu, Qizhi Zhang, Yali Zhou

Journal of System Simulation

Abstract: The stable control of quasi-passive biped robot on level ground is studied. The bipedal spring-mass model of three degrees of freedom with variable leg stiffness is studied as the object, the force supplied by the variable stiffness spring and the force of the moment of inertia provided by the hip joint are applied as the walking power source, and the dynamic equations is established by Lagrange method. The force of the hip joint is designed on the basis of the PD controller and the rotation angle of the upper body is controlled. The controlled force produced by the variable …


Simulation On The Asynchronous Reverse Ventilation In Multi-Airshaft Mine, Zongxiang Li, Baosheng Lu, Tianming Wang, Yadi Wang 2020 1. College of Safety Science and Engineering, Liaoning Technical University, Fuxin 123000, China;;2. Key Laboratory of Mine Thermodynamic disasters and Control of Ministry of Education, Fuxin 123000, China;

Simulation On The Asynchronous Reverse Ventilation In Multi-Airshaft Mine, Zongxiang Li, Baosheng Lu, Tianming Wang, Yadi Wang

Journal of System Simulation

Abstract: To describe accurately the change process of airflow and gas in mine ventilation system during mine reverse ventilation period, the software TF1M3D was used to research the asynchronous reverse ventilation in multi-airshaft mine. The possible appeared three ventilator working conditions that shutdown, single operation, dual machine operation were defined and the according three codes were given respectively which were used to be the judgment of ventilator working condition. A numerical simulation test was made with the eighth of Hebi Colliery, the simulation results is consistent with the actual testing records of gas density. At the beginning of reverse …


Design And Simulation Of Regional Differently Filtering Method Of Fbp Algorithm For Multilayer Spherical Shell, Jingtao Xia, Qunshu Wang, Jiming Ma, Hei Dongwei, Sheng Liang, Fuli Wei, Guzhou Song 2020 State Key Laboratory of Intense PulsedRadiation Simulation and Effect(Northwest Institute of Nuclear Technology), Xi’an 710024, China;

Design And Simulation Of Regional Differently Filtering Method Of Fbp Algorithm For Multilayer Spherical Shell, Jingtao Xia, Qunshu Wang, Jiming Ma, Hei Dongwei, Sheng Liang, Fuli Wei, Guzhou Song

Journal of System Simulation

Abstract: Aiming at the CT detection technology research for multilayer spherical shell with great density difference, the parallel beam CT projection and image reconstruction system model were built and a software platform was developed. Combined with theoretical analysis and computer simulation, the filtering method of FBP theory for image reconstruction was focused on. A special scanning mode was limited to make the projection sinogram of multilayer spherical shell show a regional spatial distribution, which was divided up combined with image analysis and priori knowledge. Then, according to the frequency characteristic and reconstruction demand, RL and SL functions were respectively used …


Blind Image Quality Assessment Based On Natural Scene Statistics, Haiyang Li, Weiguo Cao, Shirui Li, Kelu Tao, Li Hua 2020 1. Key Laboratory of Intelligent Information Processing, Institute of Computing Technology, Chinese Academy of Sciences, Beijing, 100190, China;;2. University of Chinese Academy of Sciences, Beijing, 100049, China;

Blind Image Quality Assessment Based On Natural Scene Statistics, Haiyang Li, Weiguo Cao, Shirui Li, Kelu Tao, Li Hua

Journal of System Simulation

Abstract: Nowadays blind/referenceless image spatial quality evaluator (BRISQUE) based on natural scene statistics is one of the state-of-the-art no-reference algorithms. But it only analyzes the original image and ignores the difference of the features constructed. Here an improved algorithm BRISQUEs is proposed and implemented by three steps. First, we apply mean subtracted contrast normalized to the gradient images and construct a new feature vector to assess quality. Second, we weight some key features of BRISQUE to improve assessment. After the two assessments obtained, a further average is made to weaken the bias from different assessments. Through the experiments on the …


Digital Simulation And Synthesis Of Yunnan Out-Of-Print Woodcuts Based On Nicks, Li Jie, Jianxia Hou, Xuesong Wang, Xu Dan, Yuanyuan Pu 2020 Yunnan University, Kunming 650091, China;

Digital Simulation And Synthesis Of Yunnan Out-Of-Print Woodcuts Based On Nicks, Li Jie, Jianxia Hou, Xuesong Wang, Xu Dan, Yuanyuan Pu

Journal of System Simulation

Abstract: Woodcut printing is a painting, in which knife and wood block are used instead of pen and paper. Yunnan out-of-print woodcut is an extension of the woodcut printing. By working with a single block and multiple printings, Yunnan out-of-print woodcut can produce special effects of color overlap. Following the working process of it, an automatic method was studied based on nicks to synthesize a virtual Yunnan out-of-print woodcut. Image was sliced out by using color clustering. A global orientation field was got which reflected the gradient information. Real nicks guided by streamlines was placed based on orientation field. The …


Flow Visualization Based On Enhanced Streamline Line Integral Convolution, Han Min, Haichao Zhang, Maosong Bian, Danchen Zheng 2020 Faculty of Electronic Information and Electrical Engineering, Dalian University of Technology, Dalian 116023;

Flow Visualization Based On Enhanced Streamline Line Integral Convolution, Han Min, Haichao Zhang, Maosong Bian, Danchen Zheng

Journal of System Simulation

Abstract: In order to show the flow information clearly and reduce the calculation of linear integral convolution, an enhanced streamline linear integral convolution algorithm was proposed. The generation of streamlines were improved. Critical points were detected and the points’ area with a gradient fill was generated. Combined two integration methods in different areas, the integration step was updated adaptively. Utilizing the parallelism of GPU and GLSL (OpenGL shading language), the algorithm further improved the sharpness of the output image. Experiments show that the improved linear integral convolution algorithm posses both the speedability and the precision. And the flow visualization of …


Soft Sensor Of Particle Size Of Grinding Process Based On Improved Csapso Neural Networks, Zhou Ying, Huimin Zhao, Chen Yang, Wang Long 2020 1. School of Control Science and Engineering, Hebei University of Technology, Tianjin 300130, China;;2. Hebei Control Engineering Research Center, Tianjin 300130, China;

Soft Sensor Of Particle Size Of Grinding Process Based On Improved Csapso Neural Networks, Zhou Ying, Huimin Zhao, Chen Yang, Wang Long

Journal of System Simulation

Abstract: Aiming at the problems that the particle size can’t be measured online and the offline analysis by lab sample existing in large-time delay, by combining the characteristics of the one stage grinding circuit, the soft sensor model of particle size was proposed by the combination of improved chaotic self-adaptive particle swarm optimization and BP neural network algorithm. Taking advantages of chaotic theory ergodicity and PSO global optimal searching ability, the algorithm above couldadjust the weights of BP network adaptively and avoid falling into the local optimum. As a result of MATLAB simulation, the measurement accuracy of the improved CSAPSO-BP …


Grey Wolf Optimizer For Parameters Identification Of Induction Motor With Improved Model, Xiaoyi Lü, Huang Song, Wang Yan, Zhicheng Ji 2020 Engineering Research Center of Internet of Things Technology Applications Ministry of Education, Jiangnan University, Wuxi 214122, China;

Grey Wolf Optimizer For Parameters Identification Of Induction Motor With Improved Model, Xiaoyi Lü, Huang Song, Wang Yan, Zhicheng Ji

Journal of System Simulation

Abstract: According to the problems of inaccurate parameters estimation of the induction motor in high-performance control, a grey wolf optimizer was used to identify the parameters of the induction motor. Grey wolf optimizer is a new meta-heuristic. It is simple and flexible to implement, and has fewer parameters to tune. Considering that two typical dynamic mathematical models have different identification precision on different parameters, the improved identification model of the induction motor was proposed. Compared with typical model, simulation results show that the proposed model obviously improves the identification performance of resistances especially stator resistance, verifying the validity …


Optimized Linear Active Disturbance Rejection Controller Design For Hydraulic Turbine Governing Systems, Huang Yu, Jiarong Wang 2020 Hebei Engineering Research Center of Simulation ? Optimized Control for Power Generation, North China Electric Power University, Baoding 071003, China;

Optimized Linear Active Disturbance Rejection Controller Design For Hydraulic Turbine Governing Systems, Huang Yu, Jiarong Wang

Journal of System Simulation

Abstract: The linear active disturbance rejection control is difficult to obtain good control effect as its parameters are not easy to get. A gravitational search algorithm based on Nelder-Mead (NM) simplex search was presented. The replace mechanism of NM simplex search and the particles update method of gravitational search algorithm were combined together in this algorithm. Simplex method has strong local search ability, therefore, the algorithm can overcome the shortcomings of gravitational search algorithm plunging into the local optimal. The proposed algorithm was applied to the parameter optimization of linear active disturbance rejection controller of hydraulic turbine governor system. Simulation …


Modeling And Simulation Of Boiler Superheated Steam Temperature System Based On System Dynamics, Le Wei, Yuanyuan Yan 2020 1. School of Control and Computer Engineering, North China Electric Power University, Baoding 071003, China;;

Modeling And Simulation Of Boiler Superheated Steam Temperature System Based On System Dynamics, Le Wei, Yuanyuan Yan

Journal of System Simulation

Abstract: Based on the principle of system dynamics, from the perspective of mass and energy conservation, taking the causal loop diagrams and the stock and flow diagrams as the carriers, and starting from the running mechanism of the system, the system dynamics model for the boiler superheated steam temperature system was established. This model has clear structure and reasonable complexity. By using the high temperature super-heater of the 300 MW boiler-turbine unit of Hebei Qingyuan Power Plant as the research object, simulation studies were carried out in Vensim PLE environment. The simulation curves were compared with the curves of …


Numerical Simulation On Self-Synchronization Of Double Mass Vibrating System With Tri-Exciter, Yongjun Hou, Le Yu, Fang Pan, Zhou Ran 2020 School of Mechatronic Engineering, Southwest Petroleum University, Chengdu 610500, China;

Numerical Simulation On Self-Synchronization Of Double Mass Vibrating System With Tri-Exciter, Yongjun Hou, Le Yu, Fang Pan, Zhou Ran

Journal of System Simulation

Abstract: A double mass vibrating system of self-synchronization with tri-exciter was put forward. The dynamic differential equation of the double mass vibrating system was established and the electromechanical coupling mathematical model was got. The new electromechanical coupling simulation model was built. By the method of controlling variables, the effects of various factors, such as stiffness of middle spring, resonance, centrifugal force and motor mounting position on self-synchronization of the system and phase difference were studied in a numerical experiment manner. The research results show this system can achieve a stably synchronized motion under certain conditions. The stiffness of intermediate spring, …


Bubble Dynamics Simulation In Transformer Oil Under Ac Electric Field, Zhao Tao, Yunpeng Liu, Fangcheng Lü, Liu Shan 2020 1. School of Electrical engineering, North China Electric Power University, Baoding 071003, China;;

Bubble Dynamics Simulation In Transformer Oil Under Ac Electric Field, Zhao Tao, Yunpeng Liu, Fangcheng Lü, Liu Shan

Journal of System Simulation

Abstract: The dynamics of gas bubbles in transformer oil was theoretically explored. A numerical model was introduced for the bubble dynamics in the transformer oil under AC electric field. The electrodynamic force was calculated by integrating the Maxwell stress tensor on the surface of the bubble, and then the bubble trajectory was obtained through the force calculation of the bubble under the AC electric field. Notably, trajectories calculated indicate the bubble aggregation in concentrated area of the electric field between the needle-plane electrode, and different bubble radius will affect the trajectory of the bubble. Also, different bubble radiuses cause a …


Research Progress On Weapon And Equipment Effectiveness Evaluation, Yuchen Zhou, Shengling Lin, Ma Ping, Li Wei, Yang Ming 2020 Control and Simulation Center, Harbin Institute of Technology, Harbin 150001, China;

Research Progress On Weapon And Equipment Effectiveness Evaluation, Yuchen Zhou, Shengling Lin, Ma Ping, Li Wei, Yang Ming

Journal of System Simulation

Abstract: Effectiveness is an important indicator to evaluate the weapon and equipment, and can support the decision-making of the weapon and equipment planning, scheme examination, design, development and operational application, et al. With the application of digital thread and digital twin in the life cycle of weapon and equipment, effectiveness evaluation faces a series of challenges, including the complex operational scenario, complicated data scene, expensive simulation, pervasive and agile evaluation, et al. The related concepts of weapon and equipment effectiveness and the development process of effectiveness evaluation are summarized. The problems of effectiveness evaluation are discussed. The solutions for the …


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