Open Access. Powered by Scholars. Published by Universities.®
Numerical Analysis and Scientific Computing Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Engineering (4188)
- Artificial Intelligence and Robotics (4163)
- Computer Engineering (3960)
- Operations Research, Systems Engineering and Industrial Engineering (3946)
- Systems Science (3880)
-
- Databases and Information Systems (808)
- Programming Languages and Compilers (773)
- Social and Behavioral Sciences (268)
- Theory and Algorithms (217)
- Applied Mathematics (153)
- Physics (151)
- Software Engineering (146)
- Data Science (116)
- Other Computer Sciences (115)
- Statistics and Probability (113)
- Communication (107)
- Life Sciences (104)
- Business (103)
- Graphics and Human Computer Interfaces (93)
- Mathematics (92)
- Social Media (91)
- Numerical Analysis and Computation (85)
- Medicine and Health Sciences (82)
- Electrical and Computer Engineering (72)
- Systems Architecture (64)
- OS and Networks (61)
- Applied Statistics (58)
- Institution
-
- China Simulation Federation (3880)
- Singapore Management University (1060)
- University of Nebraska - Lincoln (747)
- Missouri University of Science and Technology (104)
- Old Dominion University (51)
-
- University of Arkansas, Fayetteville (48)
- University of Dayton (36)
- California Polytechnic State University, San Luis Obispo (33)
- Chapman University (28)
- City University of New York (CUNY) (28)
- Purdue University (25)
- Embry-Riddle Aeronautical University (24)
- Illinois State University (23)
- University of Kentucky (23)
- Central Bank of Nigeria (21)
- Southern Methodist University (20)
- Technological University Dublin (19)
- University of New Mexico (16)
- University of Montana (15)
- University of Nebraska at Omaha (15)
- Air Force Institute of Technology (13)
- Kennesaw State University (13)
- Claremont Colleges (12)
- LSU New Orleans (12)
- University of Nevada, Las Vegas (12)
- Virginia Commonwealth University (11)
- Central Washington University (10)
- Columbus State University (10)
- Loyola University Chicago (10)
- Edith Cowan University (9)
- Keyword
-
- Simulation (162)
- Deep learning (76)
- Path planning (76)
- Machine learning (75)
- Genetic algorithm (51)
-
- Data mining (47)
- Numerical simulation (47)
- Reinforcement learning (47)
- Modeling (46)
- Machine Learning (44)
- Virtual reality (44)
- Digital twin (43)
- Multi-objective optimization (42)
- Modeling and simulation (39)
- Particle swarm optimization (37)
- Optimization (35)
- Visualization (35)
- Social media (34)
- Deep reinforcement learning (30)
- Attention mechanism (29)
- Fault diagnosis (29)
- Neural network (29)
- Twitter (28)
- Feature extraction (27)
- UAV (27)
- Classification (26)
- Clustering (26)
- Neural networks (25)
- Simulation model (25)
- Artificial intelligence (24)
- Publication Year
- Publication
-
- Journal of System Simulation (3880)
- Research Collection School Of Computing and Information Systems (1024)
- The R Journal (708)
- Computer Science Faculty Publications (52)
- Physics Faculty Research & Creative Works (44)
-
- Theses and Dissertations (41)
- CBN Journal of Applied Statistics (JAS) (21)
- Annual Symposium on Biomathematics and Ecology Education and Research (20)
- Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works (19)
- Graduate Theses and Dissertations (19)
- Dissertations (15)
- Dissertations and Theses Collection (Open Access) (15)
- Electronic Theses and Dissertations (15)
- Graduate Student Theses, Dissertations, & Professional Papers (15)
- Chemistry Faculty Research & Creative Works (14)
- Computer Science and Computer Engineering Undergraduate Honors Theses (14)
- Master's Theses (14)
- The Summer Undergraduate Research Fellowship (SURF) Symposium (14)
- Doctoral Dissertations and Master's Theses (12)
- LSU New Orleans Theses and Dissertations (12)
- Dissertations, Theses, and Capstone Projects (11)
- Electrical & Computer Engineering Theses & Dissertations (11)
- Holland Computing Center: Faculty Publications (10)
- SMU Data Science Review (10)
- Computer Science Theses & Dissertations (9)
- Computer Science: Faculty Publications and Other Works (9)
- Interdisciplinary Informatics Faculty Proceedings & Presentations (9)
- Publications and Research (9)
- STAR Program Research Presentations (9)
- Williams Honors College, Honors Research Projects (9)
- Publication Type
- File Type
Articles 2881 - 2910 of 6662
Full-Text Articles in Numerical Analysis and Scientific Computing
Radar Countermeasures Simulation Factor Analysis Method Of Fidelity-Oriented, Guoliang Wang, Huanyao Dai, Xujian Shen, Zhou Bo
Radar Countermeasures Simulation Factor Analysis Method Of Fidelity-Oriented, Guoliang Wang, Huanyao Dai, Xujian Shen, Zhou Bo
Journal of System Simulation
Abstract: It is crucial to assess the fidelity of operational objectives simulation and complex electromagnetic environment building for designing a military simulation system. Traditional confidence, credibility, similarity are difficult to fully evaluate the entire system, and hard to focus. To solve the problem of fidelity analysis and evaluation of operational objectives and battlefield simulation environment building, the concept and content of simulation fidelity were analyzed to explore the factor analysis principle and hierarchical classification method, etc., taking radar group network confrontation as an example, and its level division structure was given. General principles and methods of radar countermeasure high-fidelity simulation …
Model Granularity Control Oriented Multi-Resolution Modeling, Huachao Mao, Gongzhuang Peng, Heming Zhang, Jiaxin Zhao, Minghui Li
Model Granularity Control Oriented Multi-Resolution Modeling, Huachao Mao, Gongzhuang Peng, Heming Zhang, Jiaxin Zhao, Minghui Li
Journal of System Simulation
Abstract: Multi-resolution modeling and simulation has been widely applied in various fields, but the current multi-resolution modeling and simulation methods cannot effectively, systematically and comprehensively address four key issues: resolution control, model consistency, information loss and cross resolution interaction. Addressing these four issues, Model Granularity Control Oriented Multi-Resolution Modeling was proposed. This modeling approach has two core modeling components: resolution state chart and resolution connecting bridge, the former is to use UML state diagram to control granularity changes triggered by cross-resolution interaction, human-computer interaction and resource optimization model, and the latter is to model the relationship between different resolution …
Simulation Modeling And Analysis Of Strong Wind-Shear Detected By Airborne Radar In X-Band, Wang Lei, Wei Ming, Yang Tao, Liu Ping
Simulation Modeling And Analysis Of Strong Wind-Shear Detected By Airborne Radar In X-Band, Wang Lei, Wei Ming, Yang Tao, Liu Ping
Journal of System Simulation
Abstract: The fluid mechanics principle and the triangle harmonic function were used to establish a simple and high real-time typical strong wind-shear field model. The simulation data of wind field velocity in horizontal fan-shaped scanning mode and vertical scanning mode based on the parameter and detecting mode of airborne phase array weather radar was proposed. The different characteristics of strong wind shear detected by airborne weather radar on the different altitude were proposed through simulation data analysis. The simulation data credibility of strong wind shear field was analized based on weather radar velocity of a strong squall line process …
Comparison Of Microscopic On-Road Fuel Consumption Model Based On Vsp And Ln (Tad), Zhao Qi, Yu Lei, Guohua Song
Comparison Of Microscopic On-Road Fuel Consumption Model Based On Vsp And Ln (Tad), Zhao Qi, Yu Lei, Guohua Song
Journal of System Simulation
Abstract: In microscopic on-road fuel consumption models, the power demand-based parameter was commonly used to characterize the vehicle activities because of its strong correlation with fuel consumption. Both VSP and the natural logarithm of Ln(TAD) were commonly used power demand-based parameters. It is necessary to compare the accuracy and characteristic of two fuel consumption models that are developed based on the VSP with Ln(TAD). By collecting and processing field vehicle activities and fuel consumption data, two fuel consumption models for LDVs, one based on the VSP and another one based on Ln(TAD) were developed. Then, the distribution model between …
Motion Planning Algorithm Based On Overall Trajectory For Locomotion Of 6-Legged Robot, Zuhua Guo, Shenjiang Wang, Shijie Zhao
Motion Planning Algorithm Based On Overall Trajectory For Locomotion Of 6-Legged Robot, Zuhua Guo, Shenjiang Wang, Shijie Zhao
Journal of System Simulation
Abstract: A traditional motion planning method based on gaits is difficult to adopt to complicate nature terrain. In order to solve the problem, a planning algorithm based on overall trajectory was proposed. The basic unit of robot maneuver was a walking step. The proposed method was to estimate position of robot in the next moment along a given overall trajectory, and then to plan the joints’ trajectory of robot. In this algorithm, the motion of a single step was decomposed into two parts, the motion of moving robot body with support of legs and the motion of swinging legs forward, …
Spherical Qtm-Based Submerged Simulation System Of Sea Level Rise, Huaqiao Xing, Miaole Hou, Wang Lei, Xiaoyi Jiang
Spherical Qtm-Based Submerged Simulation System Of Sea Level Rise, Huaqiao Xing, Miaole Hou, Wang Lei, Xiaoyi Jiang
Journal of System Simulation
Abstract: Focused on the dynamic simulation of submerged area after the rise of sea level, key technical issues were discussed, such as data organization and scheduling in large-scale 3D scene, submerged area dynamic simulation based on the adjacent relations of QTM (Quaternary Triangular Mesh) grids. A submerged simulation system based on QTM was designed and developed using Visual C#3.0 programing language and Microsoft DirectX 9 graphic interface, and the overall structure and main function of the system were introduced in detail. Tianjin Binhai New Area was selected as study area for submerged area dynamic simulation under different sea levels …
Research On Network Emulation Method Based On Shared Library Integration, Mingqing Zhang, Leigang Sun, Hongshan Kong, Xianqing Qi
Research On Network Emulation Method Based On Shared Library Integration, Mingqing Zhang, Leigang Sun, Hongshan Kong, Xianqing Qi
Journal of System Simulation
Abstract: For the high-risk, high-cost to test equipments in real network and the poor accuracy of software simulation, network emulation method was introduced; the integration between real application and simulation system is the key technology. According to the mapping principle between real device and virtual network, a network emulation model framework was proposed; the OMNeT++ simulator on the source code lever was designed; the network emulation method based on shared library integration was proposed; the problems of thread error, time distortion and symbolic space in the process of integration were discussed, and corresponding solutions were given; the correctness …
Identification And Visual Analysis Of Structure Characteristics Of Severe Storm, Jiayi Xu, Xuanxuan Huang
Identification And Visual Analysis Of Structure Characteristics Of Severe Storm, Jiayi Xu, Xuanxuan Huang
Journal of System Simulation
Abstract: A technique of adaptively extracting the feature regions from radar storm data was proposed based on the meteorological radar theory and historical statistics. A logical analysis strategy was proposed to identify convective cores, searched full convective regions to extract isolated storm cells. The changing of reflectivity data and corresponding gradient were analyzed to classify four typical structures. In order to accurately show the extracted spatial structures of storm cell, a parallel rendering framework was constructed by improving the ray-casting algorithm. Experiment results show that the proposed technique can quickly and accurately identify and visualize the spatial structure of sever …
Improved Support Vector Pre-Extracting Algorithm In Speech Recognition Application, Hao Rui, Yanbo Niu, Xiu Lei
Improved Support Vector Pre-Extracting Algorithm In Speech Recognition Application, Hao Rui, Yanbo Niu, Xiu Lei
Journal of System Simulation
Abstract: Support vector machine (SVM) training is difficult for large-scale data set of speech recognition. A new SVM pre-extracting algorithm was proposed. On the one hand, kernel Fuzzy C-Means clustering was separately performed on each class of original data set. All the cluster centers were as a representative set of each class. On the other hand, according to the geometric distribution of support vectors and combined with the classification strategy of one-versus-one for SVM multi-class classification algorithm, boundary samples were extracted as support vectors for SVM to training and prediction. The algorithm was applied to embedded speech recognition system. Experiments …
Trusted Scheme For Defending On-Off Attack Based On Beta Distribution, Weidong Fang, Zhidong Shi, Lianhai Shan, Fengrong Li, Xiuzhi Wang
Trusted Scheme For Defending On-Off Attack Based On Beta Distribution, Weidong Fang, Zhidong Shi, Lianhai Shan, Fengrong Li, Xiuzhi Wang
Journal of System Simulation
Abstract: Using encryption and authentication mechanisms can only prevent external attacks, but these mechanisms for internal attacks are invalid in Wireless Sensor Networks (WSNs). On-off attack also belongs to internal attacks, which has more concealment and aggressive, due to its reputation value dynamic changing. By using difference value and trend analysis based on BETA distribution, an effective trust mechanism was proposed to defend On-off attack. Simulation shows that this scheme can defend On-off attack, and be easy to implement.
3-Dimensional Kinematics Simulation Of Gear Hobbing, Rongchuang Zhang, Wang Jun, Wang Bo, Wanshan Wang
3-Dimensional Kinematics Simulation Of Gear Hobbing, Rongchuang Zhang, Wang Jun, Wang Bo, Wanshan Wang
Journal of System Simulation
Abstract: To save inevitable modeling insufficiencies owing to the simplified modeling strategie, 3-dimensional kinematics simulation of gear hobbing based on solid modeling was developed. On the basis of the kinematic relationship and positional relationships between the hob cutter and work piece, the vector model of the gear hobbing motion based time-driven was put forward. Based on UG Secondary Development, geometrical model of hob tooth rake face and curvilinear model of hob tooth path were developed, and the swept geometric entity of the hob tooth was developed through the use of the combination of these two models. The intersection of …
Online Identification Path Following Cascade Control Of Non-Holonomic Mobile Robot, Zilong Liu, Shaokai Hu, Liu Jie, Yagang Wang
Online Identification Path Following Cascade Control Of Non-Holonomic Mobile Robot, Zilong Liu, Shaokai Hu, Liu Jie, Yagang Wang
Journal of System Simulation
Abstract: A DC motor driven wheeled mobile robot path following control problem was considered, where the robot model was regarded as a cascade system consisting of the equation of the drive motor and the mobile robot kinematics equations. Taking the output speed of motor-driven equation as the input of the kinematic equations, identifying these time-varying parameters of the driven equation online, adding the values after identification to the controller, a feedback linearization path following control scheme was proposed. The scheme both investigates the dynamic characteristics of kinematics model and motor drive, so that the results better follow the actual cases …
Adjacent Bit Xor Operation Based Test Data Compression Method, Yifei Cheng, Wenfa Zhan
Adjacent Bit Xor Operation Based Test Data Compression Method, Yifei Cheng, Wenfa Zhan
Journal of System Simulation
Abstract: Data compression is a very effective method to reduce the test cost. An adjacent bit XOR operation based test data compression method was proposed based on bitwise XOR operation between itself and its previous bit, which turned continuous series, such as a series of all 0s and all 1s into series of all 0s, and reversal series, such as a series of 01 and 10 into series of all 1s by bitwise XOR operation between adjacent bits. On one hand, the two kinds of series, continuous series and reversal series, were both taken into account, which decreased the number …
A Class Of Prediction Based Adaptive Pid Controller, Yanjun Liu, Yawen Mao
A Class Of Prediction Based Adaptive Pid Controller, Yanjun Liu, Yawen Mao
Journal of System Simulation
Abstract: The PID controller has been widely used in various industrial processes. However, for real practical control plants, their mechanisms, structures and operation conditions are different, and conventional tuning methods cannot always work in a desirable state. In order to improve the robustness and the stability of the control systems, advanced PID control algorithms have been attracted much attention. A prediction based adaptive control algorithm is proposed for CARIMA models, where the PID parameters can be tuned adaptively according to the parameters of the control plant. The key is minimizing a performance index which considers the quadratic predicted output, over …
Study Of Setting Up Simulation Platform Of Self-Adaptive Flight Control System With Self-Repair Function, Long Hao, Shujie Song
Study Of Setting Up Simulation Platform Of Self-Adaptive Flight Control System With Self-Repair Function, Long Hao, Shujie Song
Journal of System Simulation
Abstract: The frame and characteristic of self-adaptive flight control system with self-repair function for aircraft with thrust vector were studied. RHO optimal algorithm was used to realize online controller design. MSLS algorithm was used to realize online flight identify parameters. Global parity space method, sensor data fusion and probability theory were used to realize FDI algorithm. The simulation platform used to simulate self-repair function with aircraft control surface failure was developed using OOP language VC++6.0 and three-dimensional graphics language OpenGL. Simulations show that the control surface and flight aerodynamic parameter change with flying states in the flight movement …
Uav Takeoff Decision Based On Neural Network Model Of Takeoff Capability, Yongtao Peng, Yueping Wang, Xiaoting Wang
Uav Takeoff Decision Based On Neural Network Model Of Takeoff Capability, Yongtao Peng, Yueping Wang, Xiaoting Wang
Journal of System Simulation
Abstract: To enhance the safety in case of engine flameout failure, a new type of UAV takeoff decision based on neural network capacity model was proposed. Two capacity parameters of takeoff safety in case of engine flameout failure were defined, one is the maximum velocity for a safe takeoff and the other is the minimum velocity for a safe shut down. A calculation method based on iterative simulations for those parameters under multiple flight conditions was introduced. Double layer neural networks were used to model the relationship between flight conditions and the capacity parameters, to realize the compressive storage and …
Time-Cost Risk Analysis For Complex Product Development Project By Simulation, Baosen Yang, Yang Nan, Cui Li
Time-Cost Risk Analysis For Complex Product Development Project By Simulation, Baosen Yang, Yang Nan, Cui Li
Journal of System Simulation
Abstract: Since complex product R&D project is characteristic with more stochastic factors, a dynamic simulation model of stochastic activity network was established for complex product R&D projects by consideration of the activity iteration and its dynamic characteristics. The methods of describing task rework probability, rework impact, iteration rework policy and so on were researched deeply. A case study illustrates the modeling process and the result of simulation.
Modeling And Simulation Of Rectifying Circuit For Simultaneous Wireless Information And Power Transfer, Zuxiang Zheng, Lenan Wu
Modeling And Simulation Of Rectifying Circuit For Simultaneous Wireless Information And Power Transfer, Zuxiang Zheng, Lenan Wu
Journal of System Simulation
Abstract: Simultaneous wireless information and power transfer (SWIPT) is intended to transmit information and energy simultaneously over the wireless channels. As a major component of SWIPT, a rectifying circuit is an essential influencing factor for power conversion efficiency of SWIPT. Closed-form equations of power conversion efficiency and input power of rectifying circuit were derived to predict the performance. This simplified model is useful for circuit design and optimization. The result of theoretical analysis and ADS simulation shows that Ultra Narrow Band (UNB) signal has a sine-like performance in wireless power transfer. Using UNB signal as a novel modulation scheme, and …
Research On Simulation Method Of Unconformity Surface In Rock Mass Based On Pfc3d, Teijun Cui, Yundong Ma, Laigui Wang
Research On Simulation Method Of Unconformity Surface In Rock Mass Based On Pfc3d, Teijun Cui, Yundong Ma, Laigui Wang
Journal of System Simulation
Abstract: In order to accurately simulate the rock mass, considering the effects of the unconformity to simulation, the method was purposed to simulate the different contact situation using PFC3D based on the Particle flow theory, include: integration, parallel unconformity, angular unconformity. Simulation step include: define the rock coordinate system; determine the key points of contact trend; use MATLAB to fit the trend curve and get the parameters; use PFM to construct the model; shaping contact surface using FISH according the parameters. The structured model satisfies the above requirements, which proved the model is close to the actual rock mass mechanics …
Transient Analysis Of Metro Vehicle Auxiliary Inverter During Pantograph And Catenary Off-Line, Xiaobo Li, Wu Hao, Jiechen Xu
Transient Analysis Of Metro Vehicle Auxiliary Inverter During Pantograph And Catenary Off-Line, Xiaobo Li, Wu Hao, Jiechen Xu
Journal of System Simulation
Abstract: Pantograph and catenary off-line brings great harm to the safe and reliable operation of subway vehicles. The equivalent process during off-line and the off-line equivalent circuit of subway vehicles was proposed. Taking a metro vehicles powered auxiliary inverter system as an example, the off-line transient analysis was carried out, and a simulation test was conducted. As shown in the results, the useful signal during off-line greatly reduced in vehicle system and the harmonics of Insulated Gate Bipolar Transistor (IGBT) voltage was greatly increased. The questions about heat-resistant and insulation arose, which caused the inverter module to damage and greatly …
Simulation And Test Of Mold Transport Mechanism Of Multi Mold Cycle Production Line, Yanjun Xiao, Liu Rui, Haiping Song, Jing Ran, Lihu He
Simulation And Test Of Mold Transport Mechanism Of Multi Mold Cycle Production Line, Yanjun Xiao, Liu Rui, Haiping Song, Jing Ran, Lihu He
Journal of System Simulation
Abstract: A new mold transport mechanism was put forward. In order to verify its strength and stability, a three-dimensional model of the institution was established making structural static analysis. The model was simplified according to the results of static analysis and the critical load of the mould delivery mechanism was calculated. Then the buckling analysis of the simplified model and the original model was conducted. According to the simulation analysis of the total deformation nephogram, the stress nephogram, critical load and buckling mode, the strength and stability of the mold transport mechanism were verified. The stress concentration area and the …
Insulation Optimization Of High Voltage Box Based On Finite Element Method, Fangcheng Lü, Jianqiao Ma, Hongyu Liu, Fochi Wang, Xie Jun, Buchao Jia, Yunxiang Guo, Li Min
Insulation Optimization Of High Voltage Box Based On Finite Element Method, Fangcheng Lü, Jianqiao Ma, Hongyu Liu, Fochi Wang, Xie Jun, Buchao Jia, Yunxiang Guo, Li Min
Journal of System Simulation
Abstract: The discharge between cable connector and box walls directly affects the operational reliability of CRH. Optimized design of the electric field distribution of the connector can improve stability of CRH. The sheath installation position, sheath structure and thickness of the insulation layer were analyzed to see its influence on the distribution of field intensity. The simulation results show that insulating jacket positioned at the high voltage end of cable connector can effectively improve the electric field distribution, insulation sheath should appress to the high voltage fitting end of the cable connector and also extend to the root of first …
Application Of Fuzzy Pid Control Based On Neutral Network On High/Low Temperature Environmental Simulation System, Jingwang Jiang, Yunjie Wu, Mengchen Wu
Application Of Fuzzy Pid Control Based On Neutral Network On High/Low Temperature Environmental Simulation System, Jingwang Jiang, Yunjie Wu, Mengchen Wu
Journal of System Simulation
Abstract: High/Low Temperature Environmental Simulation System is mainly used for the functional deploying test of the giant space deployable antenna and some large-scale structures at extreme high/low temperatures, and some other relevant tests. This project requests controlling the parameters of the system in a large range with high accuracy and no overshoot. Temperature control system has features of non-linearity, time-variant, and large delay, which seriously affect the speed and accuracy of the control. However, the conventional PID finds it difficult to achieve desired effect of control. A new scheme of compound control which is referred to as fuzzy-PID control based …
Study On Simulation Modeling Of Dynamics For Landing Gear Of Helicopter With Deck-Landing, Zhang Liao, Guan Wei, Wang Gang, Li Wei, Pan Long
Study On Simulation Modeling Of Dynamics For Landing Gear Of Helicopter With Deck-Landing, Zhang Liao, Guan Wei, Wang Gang, Li Wei, Pan Long
Journal of System Simulation
Abstract: A simulation mathematics model was advanced which introduced the motion data of the deck at wheels/ground contact point into the dynamics model of the landing gear as follows: the space position and the level vector were obtained by computing the space position and pose of helicopter. The altitude and the level vector of the deck at wheels/ground contact point were obtained by computing the ship movement and the space position of helicopter's wheels. The ground reaction force was solved by that regard negative of relative altitude between the tire and the deck at wheels/ground contact point as the compression …
Collaborative Simulation Between Remote Laboratories Based On Fiber-Optic Reflective Memory, Chijun Tian, Shengbing Shen, Yanlei Li, Xianzong Wang, Zhuofeng Guo
Collaborative Simulation Between Remote Laboratories Based On Fiber-Optic Reflective Memory, Chijun Tian, Shengbing Shen, Yanlei Li, Xianzong Wang, Zhuofeng Guo
Journal of System Simulation
Abstract: Taking advantage of independently developed HY-FB2125G Fiber-Optic Reflective Memory network interface and HY-FHX8 fiber-optic hub, the fiber-Optic Reflective Memory network was built and high speed data contribution was realized. With the elaborate design of hub-centered network architecture, simulation laboratories have the ability to process collaborative experiment and reuse test resources, which provides powerful support to accomplish collaborative simulation experiments.
Application Of Flowsim For Traffic Management And Assessment In Shenzhen, Yuhan Jia, Jianping Wu, Yiman Du, Geqi Qi
Application Of Flowsim For Traffic Management And Assessment In Shenzhen, Yuhan Jia, Jianping Wu, Yiman Du, Geqi Qi
Journal of System Simulation
Abstract: Recently many traffic problems are faced by more and more cities. Since traditional method can no longer solve the above problems, and Transportation Demand Management (TDM) solutions are in desperate need. Also, as a successful application of Intelligent Traffic System (ITS), traffic simulation software has become an efficient way to carry out assessment for TDM. The implementation of congestion charge policy in Shenzhen was studied as a demonstration of TDM in China. Then the microscopic traffic simulation software, FLOWSIM, was introduced to simulate the traffic situation to do assessment of congestion charge. Based on the results, advices …
Knowledge Engineering In Simulation Of Parallel Military System, Xiaogang Qiu, Zhang Peng
Knowledge Engineering In Simulation Of Parallel Military System, Xiaogang Qiu, Zhang Peng
Journal of System Simulation
Abstract: Military model is the integration and representation of military knowledge. The main task of military simulation is either to verify the exist knowledge or to produce new knowledge about military activities. By computational experiment, it is able to gain new knowledge about the parallel military system, which is able to enrich the origin knowledge system. Combined with parallel system technology, it's possible to study the evolution process of military knowledge, which is able to help us understand the complexity of military system. From the perspective of knowledge engineering, the processes of knowledge integration, representation and evolution were studied, and …
Research On Dynamic Characteristics Of Hypersonic Vehicle Based On Large Scale Parallel Simulation, Hongyong Chen, Xuanhua Fan, Keying Wang, Fang Ye, Shifu Xiao
Research On Dynamic Characteristics Of Hypersonic Vehicle Based On Large Scale Parallel Simulation, Hongyong Chen, Xuanhua Fan, Keying Wang, Fang Ye, Shifu Xiao
Journal of System Simulation
Abstract: Based on the three predominant algorithms (Implicitly Restarted Krylov-Schur Method and Jacobi-Davidson Method ) and The PANDA Framework, a large-scale parallel computing system for modal analysis was established. The finite element model of typical wave-rider hypersonic vehicle was established and its dynamic characteristics were investigated. The numerical analysis reaches scale of 14,000,000 Degree of Freedoms (DOFs), and the number of MPI Cores is 1024. What's more, the difference of first 100 orders natural frequencies between PANDA and well known commercial software ANSYS is less than 0.01%, and mode shapes are absolutely the same, the efficiency of 1024 cores is …
Design Of Unified Algorithm For Sampling Mpdu, Ti Zhou, Miao Yi, Yang Jian
Design Of Unified Algorithm For Sampling Mpdu, Ti Zhou, Miao Yi, Yang Jian
Journal of System Simulation
Abstract: The standard of CCSDS AOS is used in space exploration because of the process of the standard airspace system. The spacecraft missions have used multi-protocol data unit (MPDU) to multiplex the package channels. The range of MPDU and the data are different in different spacecrafts. This process brings some problems in the maintenance and the correctness of the algorithms of virtual channel multiplexing in simulation system. The applications of CCSDS in the world were researched, and the general definitions of MPDU in these missions were described. A circle memory was given to buffer the data of MPDU, two general …
Wiftcpn Formalized Decision-Making For Auv Formation System Under Uncertainty, Lili Hao, Gu Hao, Fengju Kang, Huizhen Yang
Wiftcpn Formalized Decision-Making For Auv Formation System Under Uncertainty, Lili Hao, Gu Hao, Fengju Kang, Huizhen Yang
Journal of System Simulation
Abstract: Usually the acquired target information is not sufficient and certain enough due to inaccurate measurements, inconsistent granularity and noise, which results in the AUV formation decision-making system having some characteristics, such as discrete, time delay, hierarchical, fuzzy, inconsistencies. Therefore, an integrated formal approach of modeling, simulation and verification based on weighted intuitionistic fuzzy timed colored petri net (WIFTCPN) was proposed. The mapping relationship between WIFTCPN and fuzzy time, time delay and intuition fuzzy inference rules were established. Furthermore, corresponding reasoning decision simulation model under uncertain information was built by using CPN Tools. The properties including liveness, home and fairness …