Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Operations Research, Systems Engineering and Industrial Engineering (4024)
- Physical Sciences and Mathematics (4002)
- Computer Engineering (3989)
- Computer Sciences (3964)
- Artificial Intelligence and Robotics (3940)
-
- Numerical Analysis and Scientific Computing (3924)
- Social and Behavioral Sciences (68)
- Systems Engineering (66)
- Business (46)
- Computer and Systems Architecture (38)
- Digital Communications and Networking (36)
- Law (31)
- Other Computer Engineering (31)
- Psychology (26)
- Electrical and Computer Engineering (25)
- Political Science (25)
- Cognitive Science (24)
- Computer Law (24)
- Military, War, and Peace (24)
- National Security Law (23)
- Cognitive Psychology (22)
- Intellectual Property Law (22)
- International Relations (22)
- Mechanical Engineering (21)
- Operational Research (20)
- Risk Analysis (19)
- Business Administration, Management, and Operations (18)
- Public Affairs, Public Policy and Public Administration (17)
- Institution
-
- China Simulation Federation (3924)
- Old Dominion University (78)
- Portland State University (39)
- University of South Florida (27)
- Embry-Riddle Aeronautical University (13)
-
- University of Texas at El Paso (11)
- Binghamton University (8)
- Kennesaw State University (8)
- Air Force Institute of Technology (7)
- University at Albany, State University of New York (7)
- Washington University in St. Louis (7)
- California State University, San Bernardino (6)
- University of Arkansas Little Rock (5)
- Walden University (5)
- University of Nebraska - Lincoln (4)
- City University of New York (CUNY) (3)
- Clemson University (3)
- Dakota State University (3)
- Montclair State University (3)
- University of Arkansas, Fayetteville (3)
- American University in Cairo (2)
- Brigham Young University (2)
- Cal Poly Humboldt (2)
- California Polytechnic State University, San Luis Obispo (2)
- Harrisburg University of Science and Technology (2)
- Illinois State University (2)
- Louisiana Tech University (2)
- Missouri University of Science and Technology (2)
- Tashkent State Technical University (2)
- The University of Akron (2)
- Keyword
-
- Simulation (140)
- Path planning (76)
- Deep learning (49)
- Genetic algorithm (48)
- Digital twin (47)
-
- Numerical simulation (45)
- Virtual reality (43)
- Multi-objective optimization (40)
- Modeling and simulation (39)
- Modeling (35)
- Particle swarm optimization (35)
- Reinforcement learning (35)
- Deep reinforcement learning (29)
- Fault diagnosis (29)
- Attention mechanism (28)
- Neural network (27)
- Simulation model (26)
- UAV (26)
- System simulation (24)
- Complex network (22)
- Visualization (22)
- Machine learning (21)
- System dynamics (21)
- Virtual simulation (21)
- DRL (20)
- Optimization (20)
- Trajectory planning (19)
- Multi-agent (18)
- Parameter identification (17)
- Permanent magnet synchronous motor (17)
- Publication Year
- Publication
-
- Journal of System Simulation (3924)
- Engineering Management & Systems Engineering Theses & Dissertations (35)
- Dissertations and Theses (33)
- Military Cyber Affairs (27)
- Engineering Management & Systems Engineering Faculty Publications (23)
-
- Open Access Theses & Dissertations (11)
- Theses and Dissertations (9)
- McKelvey School of Engineering Graduate Student Theses & Dissertations (7)
- Doctoral Dissertations and Master's Theses (6)
- Electronic Theses, Projects, and Dissertations (6)
- Complex Systems Faculty Publications and Presentations (5)
- Legacy Theses & Dissertations (2009 - 2024) (5)
- Northeast Journal of Complex Systems (NEJCS) (5)
- Walden Dissertations and Doctoral Studies (5)
- African Conference on Information Systems and Technology (4)
- Doctoral Dissertations (4)
- VMASC Publications (4)
- All Dissertations (3)
- Discovery Day - Daytona Beach (3)
- Electrical & Computer Engineering Theses & Dissertations (3)
- Publications (3)
- Annual Symposium on Biomathematics and Ecology Education and Research (2)
- Archived Theses and Dissertations (2)
- Cal Poly Humboldt theses and projects (2)
- Chemical Technology, Control and Management (2)
- Cybersecurity Undergraduate Research Showcase (2)
- Department of Earth and Environmental Studies Faculty Scholarship and Creative Works (2)
- Electronic Theses & Dissertations (2024 - present) (2)
- Electronic Theses and Dissertations (2)
- Faculty Publications (2)
- Publication Type
- File Type
Articles 3901 - 3930 of 4223
Full-Text Articles in Systems Science
Low-Rank Sparse Joint Representation For Moving Object Detection In Video, Yang Lei, Pang Fang, Huosheng Hu
Low-Rank Sparse Joint Representation For Moving Object Detection In Video, Yang Lei, Pang Fang, Huosheng Hu
Journal of System Simulation
Abstract: For the video sequences with fixed cameras, it is a reasonable assumption that the fixed background has low-rank characteristic, and the dynamic foreground has sparse characteristic. A new motion detection method based on low-rank and sparse joint representation is proposed in this paper. The ideas of the proposed method are described as follows: The noise of video sequence is removed by image preprocessing. The optical flow between continuous video sequences is estimated, which is used to generate a binary motion mask as a movement weight matrix. An optimization model with low-rank background and sparse foreground is established based …
Mining And Validation Of Attacking Behavior In The Robocup 2d Simulation, Chen Bing, Zhang Heng, Zekai Cheng, Dong Peng, Lin Chao
Mining And Validation Of Attacking Behavior In The Robocup 2d Simulation, Chen Bing, Zhang Heng, Zekai Cheng, Dong Peng, Lin Chao
Journal of System Simulation
Abstract: Robocup is an international academic competition which focuses on artificial intelligence and robotics. The 2D simulation is one of the earliest and most influential projects in Robocup. Attacking is the core behaviour of the simulated football game, as well as the attack recognition is considered as an important part in team-confrontations. This paper selects some active and contribution index of attacking, extracts lots of attacking behaviour data of the key agents, proposes two kinds of attacking patterns of 2D simulation, as ‘separate attack’ and ‘cooperative attack’, according to the human-player actions. The following simulation tests give the accuracy of …
Real-Time Reconstruction And Simulation Of Police Dog Posture Based On Multi-Sensor Data Vest, Chaozheng Zhu, He Ming, Yang Sheng, Yang Cheng, Zhenhua Song
Real-Time Reconstruction And Simulation Of Police Dog Posture Based On Multi-Sensor Data Vest, Chaozheng Zhu, He Ming, Yang Sheng, Yang Cheng, Zhenhua Song
Journal of System Simulation
Abstract: Real-time police dog posture reconstruction provides an intelligent, convenient and over-the-horizon interactive way for police on duty with dogs. For the biological movement characteristics of police dogs, a new multi-sensor dog data vest was designed and implemented. Based on multiple small size and low power consumption sensors, a new police dog motion fusion method was proposed to capture the different posture data of police dogs, including standing, sitting and prone position, etc. For frequent jitter of police dogs, this paper proposed a method of dog posture reconstruction based on multi-sensor data vest, and introduced an improved kernel function ELM …
Uncalibrated Visual Servoing Based On Kalman Filter Optimized By Spsa, Jinqiang Zhang, Xianxia Zhang
Uncalibrated Visual Servoing Based On Kalman Filter Optimized By Spsa, Jinqiang Zhang, Xianxia Zhang
Journal of System Simulation
Abstract: Considering the problem of robot uncalibrated visual servoing, this paper presents a method for online estimation of image Jacobian matrix based on Kalman filter optimized by simultaneous perturbation stochastic approximation algorithm. This method takes the robot image Jacobian matrix as the system state, and uses Kalman filter to observe the system state. In order to improve the performance of the filter, the simultaneous perturbation stochastic approximation algorithm is used to optimize the filter parameters. This method is used to estimate the image Jacobian matrix and to design the control strategy, which can avoid complicated system calibration process. The simulation …
Modeling And Simulation Of Pem Fuel Cell / Battery Hybrid Vehicle, Guizhi Sun, Sam Park, Zhongling Lin
Modeling And Simulation Of Pem Fuel Cell / Battery Hybrid Vehicle, Guizhi Sun, Sam Park, Zhongling Lin
Journal of System Simulation
Abstract: This paper describes modeling of a hybrid power system that supplies energy to an electric vehicle based on a hybrid system that uses a proton exchange membrane (PEM) fuel cell as a primary energy source and a battery pack as an ancillary energy storage system. A threshold approach has been employed for power control. When the power required by the vehicle exceeds a threshold, the battery works with the fuel cell to satisfy the dynamic response of vehicle. Otherwise the fuel cell works alone with regenerative braking enabling recharging of battery capacity. The proposed model has been simulated and …
Cloud Fraction Of Satellite Imagery Based On Convolutional Neural Networks, Xia Min, Maoyang Shen, Jianfeng Wang, Yangguang Wang
Cloud Fraction Of Satellite Imagery Based On Convolutional Neural Networks, Xia Min, Maoyang Shen, Jianfeng Wang, Yangguang Wang
Journal of System Simulation
Abstract: Cloud fraction is the basis for the application of meteorological satellite. Existing methods cannot use all the characteristics and optical parameters of the satellite cloud, which results in the inaccuracy of cloud detection and cloud fraction. In order to solve this problem, convolutional neural network is used for cloud detection. Based on the improved convolutional neural network, the satellite cloud image is divided into thin cloud, thick cloud and clear sky. Based on the cloud detection, an improved spatial correlation method is used for cloud fraction. The results for Chinese HJ-1A/B satellite imagery show that convolutional neural network can …
Human Action Recognition Based On Depth Image, Tang Chao, Miaohui Zhang, Li Wei, Cao Feng, Xiaofeng Wang, Xiaohong Tong
Human Action Recognition Based On Depth Image, Tang Chao, Miaohui Zhang, Li Wei, Cao Feng, Xiaofeng Wang, Xiaohong Tong
Journal of System Simulation
Abstract: Because of the complexity and non-rigidity of human actions, traditional human action recognition based on RGB video data is a very challenging research topic. According to some deficiencies of existing recognition method based on RGB video data, a novel human action recognition method is proposed based on depth image data. In this new method, the block mean feature in the depth difference motion historical image is fused with the Gabor feature as mixed features and then a rotation forest algorithm is used to model. The experimental results show that the proposed method is simple, fast and efficient compared …
Prediction Model Of Coke Quality Based On De-Bp Neural Network, Wenhua Tao, Zhengbo Yuan
Prediction Model Of Coke Quality Based On De-Bp Neural Network, Wenhua Tao, Zhengbo Yuan
Journal of System Simulation
Abstract: The quality of coke has a great effect on the furnace process. In order to solve the problem of large amount of calculation and inspection of coke quality prediction linear method, the coke quality prediction model based on DE-BP neural network is established on the basis of analyzing the factors affecting coke quality, which uses principal component analysis method to determine the parameters of the input vector with the coal and coke ash quality indicators Ad, sulfur Std, crushing strength M40, abrasion resistance M10 as the output vector prediction. The result of …
Key Frame Extraction For Slam Based On Spatio-Temporal Slices, Xinliang Zhang, Li Yang, Yunji Zhao
Key Frame Extraction For Slam Based On Spatio-Temporal Slices, Xinliang Zhang, Li Yang, Yunji Zhao
Journal of System Simulation
Abstract: To deal with the data redundancy and computational complexity of the mobile robot 3D visual SLAM (simultaneous localization and mapping), a key frame extraction technique based on spatio-temporal slices is proposed. Based on the analysis of the texture characteristics of the spatio-temporal slices, it yields that the motion state of the image acquisition device can be represented by the slope change of the texture. The similarity degree between two adjacent slices is measured to find out the key frame by use of the nearest neighbor pixel-matching algorithm, which can accurately describe the motion state of the device …
Simulation Of Blade Erosion Of Variable-Pitch Axial Flow Fan, Chunxi Li, Zhang Dan, Xuemin Ye
Simulation Of Blade Erosion Of Variable-Pitch Axial Flow Fan, Chunxi Li, Zhang Dan, Xuemin Ye
Journal of System Simulation
Abstract: Affected by the performance of dust precipitators, significant differences of blade erosion regimes and erosion rates in induced draft fans are exhibited due to various particle diameters and concentrations. A 3D numerical simulation on a single-stage axial fan is carried out using Fluent to investigate the blade erosion regimes. The important features including particle trajectories under different particle diameters, erosion pattern and particle mass concentration distribution on the pressure and suction surfaces are examined, and the effect of particle mass concentration on erosion rate is analyzed. The results show that the erosion regimes are mainly affected by particle diameter. …
Research On Numerical Simulation Of Continuous Roll Forming Process Of Four-Roll Plate Bending Machines, Wang Yan, Xinqing Zhu, Jiefei Hu, Ximin Cui
Research On Numerical Simulation Of Continuous Roll Forming Process Of Four-Roll Plate Bending Machines, Wang Yan, Xinqing Zhu, Jiefei Hu, Ximin Cui
Journal of System Simulation
Abstract: In order to improve the production process quality of four-roll plate bending machines, a four-roll bending mathematical model is established and a finite element simulation is used to verify its accuracy. The influence of side roller displacement, sheet thickness, and rotational speed on the radius and quality of the final shaped plate are analyzed. The simulation results show that as the displacement of side roll increases, the downtrend of the sheet forming radius gradually slows down and the quality of the formed sheet also decreases. Plastic strain fluctuation on plate surface decreases as the thickness increases, quality of thick …
Research On Fault Detection And Isolation Method For Typical Hydraulic System, Lixia Zhang, Fuzhou Feng, Xiangbo Liu, Wang Min
Research On Fault Detection And Isolation Method For Typical Hydraulic System, Lixia Zhang, Fuzhou Feng, Xiangbo Liu, Wang Min
Journal of System Simulation
Abstract: The integrated transmission device possesses some inherent characteristics of the multiple working modes, discontinuity, multi-coupling, which lead to problems such as the fault detection difficulty and fault isolation inaccuracy. Analyzed in detail the structure and working principle of torque converter compensation circuit, the bond graph modeling and diagnosis methods were studied. Then the relationship between global analytical redundancy and fault characteristic matrix is established, which accurately accomplishes the fault detection and isolation. Finally, the rules between the analytical redundancy relations and different faults are verified by simulation experiments, which indicate that the design and application of FDI based on …
Orm-Dcsk: A Novel Dcsk Communication Scheme, Zhang Gang, Chuangang Wang, Guoquan Li, Jinzhao Lin
Orm-Dcsk: A Novel Dcsk Communication Scheme, Zhang Gang, Chuangang Wang, Guoquan Li, Jinzhao Lin
Journal of System Simulation
Abstract: To overcome the intra-signal interference components and the large average bit energy existing in decision variables, an improved RM-DCSK algorithm, named ORM-DCSK, is proposed. An orthogonal chaotic generator is designed to eliminate the intra-signal interference components. Besides, the signal frame format is expanded to reduce the average bit energy. The BER is derived and simulated in AWGN channel. The simulation results show that ORM-DCSK performs greatly better in BER performance than RM-DCSK algorithm without sacrificing transmission rate.
Complete Coverage Belief Function Path Planning Algorithm Of Autonomous Underwater Vehiclebased On Behavior Strategy, Wenyang Gan, Daqi Zhu
Complete Coverage Belief Function Path Planning Algorithm Of Autonomous Underwater Vehiclebased On Behavior Strategy, Wenyang Gan, Daqi Zhu
Journal of System Simulation
Abstract: For the complete coverage path planning of autonomous underwater vehicle (AUV), a complete coverage belief function path planning algorithm based on behavior strategy is proposed by introducing the behavior strategy and using the concept of map belief function, which can make AUV accomplish the complete coverage and avoid obstacles automatically. The grid belief function is constructed based on environmental information, using different function values to distinguish between the obstacle, the covered and the uncovered grid. AUV selects the next navigation position by path planning strategy. Next navigation position is selected by behavior strategy if AUV navigates to the …
Gradient Descent Self-Tuning Control Of Flexible Space Manipulator After Capturing Operation, Cheng Jing, Chen Li
Gradient Descent Self-Tuning Control Of Flexible Space Manipulator After Capturing Operation, Cheng Jing, Chen Li
Journal of System Simulation
Abstract: The flexible vibration is generated after all-flexible space manipulator capturing a satellite, and the collision leads to unsteadiness of system. For the unstable composite system, the self-turning control algorithm based on hybrid trajectory is designed in this paper. The theory of gradient descent is used for parameter adaptive rate design to realize the real time adjustment of the PID control parameters. A supervised controller is designed through Lyapunov function to generate the stability and H∞ tracking characteristic of the system. The hybrid trajectory is generated based on the concept of virtual force, which is used to accomplish …
Bound Analysis Of Signal Processing Method On Laser Doppler Velocity & Vibration Measurement, Peng Xiang, Liu Bo
Bound Analysis Of Signal Processing Method On Laser Doppler Velocity & Vibration Measurement, Peng Xiang, Liu Bo
Journal of System Simulation
Abstract: Laser Doppler measurement technology has attracted more and more attention and application in the field of high precision measurement. For different signal characteristics and processing methods, there are different constraints of the measurement, which would determine the measurement precision and accuracy. Based on the principle of laser Doppler velocity & vibration measurement and from the perspective of digital signal processing, the constrains related to the sampling rate, data length and time interval are analyzed. The time-interval homogenization processing method of the second sampling data, and the effect on the measurement range of aliasing about reference light frequency and signal …
A Study Of Adaptive Simulated Annealing Particle Swarm Optimization (Asapso) Algorithm For Building Pipe Routing Design, Changtao Wang, Xiaotong Sun, Zhonghua Han, Zhu Yi
A Study Of Adaptive Simulated Annealing Particle Swarm Optimization (Asapso) Algorithm For Building Pipe Routing Design, Changtao Wang, Xiaotong Sun, Zhonghua Han, Zhu Yi
Journal of System Simulation
Abstract: To solve the building pipe routing design problem, a mathematical model was formulated. The length of pipe, the number of bends and the laying area were taken as the comprehensive evaluation indexes. Adaptive Simulated Annealing Particle Swarm Optimization (ASAPSO) algorithm was proposed for optimization. In the ASAPSO algorithm, a self-adaptive parameter adjusting strategy and simulated annealing algorithm adjusting the optimal particle location were introduced to enhance the capacity in escaping from the local optimal. A new population initialization method based on the cost of selection probability was designed at the initial population. The simulation showed that compared with the …
Simulation Research Of General Cargo Terminal Operation Based On Plant Simulation, Zhixiong Liu, Xiong Yang, Xingxu Deng, Yuting Chen
Simulation Research Of General Cargo Terminal Operation Based On Plant Simulation, Zhixiong Liu, Xiong Yang, Xingxu Deng, Yuting Chen
Journal of System Simulation
Abstract: Combined with the key link of the general cargo loading and unloading operations, the system simulation method is employed to analyze the production efficiency for the general cargo handling operation. The Plant Simulation software is used to design the main modules of the production process such as collection operation, vessel arrival, yard operation, horizontal transportation, ship-loading operation. The simulation model of general cargo handling operation is established based on the whole operation process. The simulation model is running based on the practical production data, and the efficiency of the crane, transitions time and the average storage period are analyzed. …
Synthesized Capability-Effectiveness Evaluation Method Of Contribution Ratio To System-Of-Systems, Xiaobo Li, Lin Mu, Zhe Shu, Guibai Liu, Wang Tao, Weiping Wang
Synthesized Capability-Effectiveness Evaluation Method Of Contribution Ratio To System-Of-Systems, Xiaobo Li, Lin Mu, Zhe Shu, Guibai Liu, Wang Tao, Weiping Wang
Journal of System Simulation
Abstract: Since modern combats represent the development trend of systematization and network, it has become an essential requirement to build and use the equipment through a system-of-systems approach. The evaluation of contribution ratio to system-of-systems (CRSOS) is an important means to advance the development of weapon equipment systematization, and it is also urgently needed to carry out in-depth research on the theoretical concepts and methods. This paper establishes the research framework of CRSOS from the classification of contribution type and the equipment management life cycle. It proposes a CRSOS definition from the perspective of capability-efficiency dimension based on current …
Research On The Conceptual Modeling Of Coa For Analysis Of Wargaming, Zhaopeng Liu, Shaojun Liu, Guangya Si, Zhou Wen
Research On The Conceptual Modeling Of Coa For Analysis Of Wargaming, Zhaopeng Liu, Shaojun Liu, Guangya Si, Zhou Wen
Journal of System Simulation
Abstract: On the background of the Campaign COA analysis with simulation system wargaming, aiming at the information sharing problem in the course of wargaming, the composition and difference of the domestic and foreign COA are deeply analyzed, and the development trend of the COA modeling methods are also analyzed. The COA models are divided into the conceptual models and the solution models for the first time, and the limitation of the current COA conceptual models is analyzed with this viewpoint. For the characteristics of across the campaign level and tactical level during the process of the COA wargaming, utilizing …
Research And Realization Of 3d Scene Modeling In Chemical Industry Park, Hongyue Zhu, Bin Chen, Xiaodong Wang, Rongxiao Wang, Zhengqiu Zhu, Xiaogang Qiu
Research And Realization Of 3d Scene Modeling In Chemical Industry Park, Hongyue Zhu, Bin Chen, Xiaodong Wang, Rongxiao Wang, Zhengqiu Zhu, Xiaogang Qiu
Journal of System Simulation
Abstract: Aiming at the visualization of atmospheric pollution monitoring data in chemical parks, the method of 3D modeling in chemical industry parks is studied, and a remote-web-login and realistic three-dimensional visual information management system based on GIS remote sensing data and sensors’ monitoring data is realized. For simple objects such as buildings, rapid modeling based on GIS data is used; for complex objects such as chemical devices, 3ds Max and UAV tilt photography are combined to model; in terms of visualization, Cesium-based web front-end development technology is adopted. By adopting the above modeling methods in combination, not only the repetitive …
Channel Modeling And Networking Simulation Of Full Duplex Communication, Zhimin Liu, Sun Jie, Jiarui Ding
Channel Modeling And Networking Simulation Of Full Duplex Communication, Zhimin Liu, Sun Jie, Jiarui Ding
Journal of System Simulation
Abstract: Full duplex communication is a new wireless communicating technology for improving the spectrum efficiency substantially. Few researches study full duplex networking technology now nationally and internationally. The architecture and implementation approach of full duplex communication system are introduced to describe the main model and functions of the platform in detail. After analyzing different kinds of self-interference cancellation technology, the self-interference cancellation module and channel model of full duplex system in the platform is built based on C language,which lays a foundation for prospective full duplex networking technology. Simulation results verify the platform’s effectiveness, and present the spectrum efficiency and …
Research Of Turbulence Model Parameters Correction For Oil Flow Of Pipeline, Jisen Wang, Jia Qian, Chen Chen, Yaping Zhang, Du Jiang
Research Of Turbulence Model Parameters Correction For Oil Flow Of Pipeline, Jisen Wang, Jia Qian, Chen Chen, Yaping Zhang, Du Jiang
Journal of System Simulation
Abstract: Because of the limitation of the parameters in the Realizable k-ε two equations model, the model is no longer suitable to simulate the pressure loss of the turbulent oil flow of pipelines. A mathematical model of the oil flow of pipeline is built, and the Realizable k-ε model default parameters are modified according to the test results of YH-15 aviation hydraulic oil to obtain new parameters used to simulate the pressure loss in other conditions. Compared to the model with default parameters, numerical simulations and experimental results show that the maximum relative error is reduced …
Design And Research On Mechanism Model Of Cyclone, Zhang Yue, Han Pu
Design And Research On Mechanism Model Of Cyclone, Zhang Yue, Han Pu
Journal of System Simulation
Abstract: The operating characteristics of the cyclone separator greatly affect the overall operating efficiency of the boiler, the gas-solid two-phase flow in the cyclone separator is complicated by the vortex flow. The mathematical model of different angles has been too complicated or one-sided to show its running mechanism. A mechanism model of the internal parameters of a cone assembly and a counter current cyclone separator has been established. The three cutting diameter calculation methods have been compared for grade separation efficiency. The pressure drop has been combined with the pressure drop of the subdivision of the system structure, and the …
Simulation Of Neighbor Discovery Algorithm In Directional Antenna Ad Hoc Networks Based On Opnet, Li Mo, Zhao Liang
Simulation Of Neighbor Discovery Algorithm In Directional Antenna Ad Hoc Networks Based On Opnet, Li Mo, Zhao Liang
Journal of System Simulation
Abstract: Neighbor discovery problem in directional antenna Ad Hoc networks is studied. A Q-Learning neighbor discovery algorithm is proposed, and a simulation model for directional antenna Ad Hoc networks based on OPNET software is setup. This algorithm makes a decision of transmitting and receiving mode for every neighbor scanning without the information of neighbor position through the Q-Learning mechanism. The reward value is determined according to the current scanning result, and the experiences are learned in order to improve the neighbor discovery efficiency. The simulation model based on OPNET software is constructed using three-layer modeling mechanism. Then the directional antenna …
Three Dimension Tolerance Analysis And Optimization Based On 3dcs, Qiaofeng Meng, Linxuan Zhang, Linzheng Yin, Zhixia Hou, Zou Fang
Three Dimension Tolerance Analysis And Optimization Based On 3dcs, Qiaofeng Meng, Linxuan Zhang, Linzheng Yin, Zhixia Hou, Zou Fang
Journal of System Simulation
Abstract: According to the tolerance allocation and optimization problems in engineering practice, the vector loop model is established by using the concept of vector, and the improved scheme based on the idea of "dichotomy" method is explored. Through the virtual assembly process of a certain model car, the rear cover and tail light are mounted on the white body. Based on 3DCS dimensional tolerance analysis and optimization of simulation, it is proved that the improved scheme with some advanced and practical property has great superiority compared to the original equal tolerance allocation method. It can solve the practical problems faced …
Design And Study Of Forest Fire Forecasting Based On Pso And Ga-Bp Neural Network, Shuhua Bai, Mingxing Kuang
Design And Study Of Forest Fire Forecasting Based On Pso And Ga-Bp Neural Network, Shuhua Bai, Mingxing Kuang
Journal of System Simulation
Abstract: This paper collects the 2013-2015 meteorological data of four stations (Nanchang, Jingdezhen, Gi’an, Ganzhou) in Jiangxi province, and the corresponding forest fire danger grading, to establish a neural network fire prediction model. Corresponding network model is built respectively by adopting the genetic algorithm, particle swarm optimization (PSO) algorithm and particle swarm genetic hybrid algorithm to optimize the BP neural network. By comparing the prediction results of BP network, GA-BP network, PSO-BP network and PSO-GA-BP network with the experiments data, it shows that the PSO-GA-BP network prediction model is of higher accuracy, the PSO and GA enjoy the best …
Simulation Method Of Electromechanical Coupling Of Slot Antenna Based On Mesh Transmission, Wang Yong, Ren Dan, Dandan Wang, Xuexiao Zheng
Simulation Method Of Electromechanical Coupling Of Slot Antenna Based On Mesh Transmission, Wang Yong, Ren Dan, Dandan Wang, Xuexiao Zheng
Journal of System Simulation
Abstract: Electromechanical coupling involves mechanical and electromagnetic interaction, and data transfer between different physical fields is the key to the electromechanical coupling simulation. An efficient and accurate method based on mesh transmission to analyze the electromechanical coupling of slot antenna is presented. Force analysis of antenna is achieved by ANSYS and the interface program is written by APDL language. The deformed mesh generated by force analysis is obtained and outputted to hypermesh software to extract the deformed mesh surface. The surface mesh is imported into the electromagnetic field analysis software FEKO to calculate the electromagnetic performance of the antenna. The …
Design Of Real-Time Digital Baseband Simulator For Spatial Information Networks, Jianfeng Liu, Ma Shang, Zeguo Yang, Lixiang Liu, Jianhao Hu
Design Of Real-Time Digital Baseband Simulator For Spatial Information Networks, Jianfeng Liu, Ma Shang, Zeguo Yang, Lixiang Liu, Jianhao Hu
Journal of System Simulation
Abstract: The commonly used channel simulators always focus on the characteristics of RF signals at the receiver. However, they are costly in real-time simulation for spatial information network with multi-link and dynamic topology change. In this paper, a scalable simulator architecture for spatial information network, a simulation method for dynamic topology and channel propagation characteristics based on baseband data packages are presented. Based on this, a real-time spatial information networks simulation platform is designed and implemented. The platform can simulate the channel propagation delay, bit error, and dynamic topology changes for spatial information network. It supports 16 to …
Numerical Simulation Analysis Of The Effects Of Flight Angle And Bend-Fold On Bird-Like Flapping-Wing Air Vehicle, Yonggang Yang, Hanping Su, Xindong Gu, Yanqing Chen
Numerical Simulation Analysis Of The Effects Of Flight Angle And Bend-Fold On Bird-Like Flapping-Wing Air Vehicle, Yonggang Yang, Hanping Su, Xindong Gu, Yanqing Chen
Journal of System Simulation
Abstract: Aiming at the multi-parameter coupling problems of flapping-wing flight of birds, a 3D model of bird-like flapping-wing air vehicle (FAV) is established based on overall dimensions of bird. A multi-degree-of-freedom motion model of “swing-torsion-bending and folding” is built. The XFlow is used to analyze the effects of flight angle and flapping-wing bending-folding. Research results show that peak values of lift coefficient and drag coefficient change with different flight angles; at the zero flight angle, minimum mean drag coefficient and maximum lift-drag ratio will be achieved and avail to level flight. Caused by the bending-folding effect, violent vortex and negative …