Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Operations Research, Systems Engineering and Industrial Engineering (3973)
- Physical Sciences and Mathematics (3957)
- Computer Engineering (3938)
- Computer Sciences (3919)
- Artificial Intelligence and Robotics (3895)
-
- Numerical Analysis and Scientific Computing (3880)
- Social and Behavioral Sciences (62)
- Systems Engineering (61)
- Business (43)
- Computer and Systems Architecture (33)
- Digital Communications and Networking (30)
- Law (27)
- Other Computer Engineering (25)
- Electrical and Computer Engineering (24)
- Psychology (23)
- Political Science (22)
- Cognitive Science (21)
- Mechanical Engineering (21)
- Computer Law (20)
- Military, War, and Peace (20)
- Cognitive Psychology (19)
- Intellectual Property Law (19)
- International Relations (19)
- National Security Law (19)
- Risk Analysis (18)
- Operational Research (17)
- Aerospace Engineering (16)
- Business Administration, Management, and Operations (16)
- Institution
-
- China Simulation Federation (3880)
- Old Dominion University (74)
- Portland State University (36)
- University of South Florida (22)
- Embry-Riddle Aeronautical University (13)
-
- University of Texas at El Paso (10)
- Air Force Institute of Technology (7)
- University at Albany, State University of New York (7)
- Binghamton University (6)
- California State University, San Bernardino (6)
- Washington University in St. Louis (6)
- Kennesaw State University (5)
- 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)
- Genetic algorithm (48)
- Deep learning (47)
- Numerical simulation (44)
-
- Digital twin (43)
- Virtual reality (43)
- Modeling and simulation (39)
- Multi-objective optimization (39)
- Modeling (35)
- Particle swarm optimization (35)
- Reinforcement learning (34)
- Deep reinforcement learning (29)
- Fault diagnosis (29)
- Attention mechanism (28)
- Neural network (27)
- Simulation model (26)
- UAV (26)
- Complex network (22)
- System simulation (22)
- Visualization (22)
- System dynamics (21)
- Machine learning (20)
- Virtual simulation (20)
- DRL (19)
- Optimization (19)
- Multi-agent (18)
- Trajectory planning (18)
- Traffic simulation (17)
- Unity3D (17)
- Publication Year
- Publication
-
- Journal of System Simulation (3880)
- Engineering Management & Systems Engineering Theses & Dissertations (32)
- Dissertations and Theses (30)
- Engineering Management & Systems Engineering Faculty Publications (23)
- Military Cyber Affairs (22)
-
- Open Access Theses & Dissertations (10)
- Theses and Dissertations (9)
- Doctoral Dissertations and Master's Theses (6)
- Electronic Theses, Projects, and Dissertations (6)
- McKelvey School of Engineering Graduate Student Theses & 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)
- Doctoral Dissertations (4)
- VMASC Publications (4)
- All Dissertations (3)
- Discovery Day - Daytona Beach (3)
- Electrical & Computer Engineering Theses & Dissertations (3)
- Publications (3)
- African Conference on Information Systems and Technology (2)
- 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 3931 - 3960 of 4159
Full-Text Articles in Systems Science
Dynamic Decision-Making Modeling For Army Operation Command Post Entity, Kang Kai, Yongliang Zhang, Chenxi Li, Jintang Pan
Dynamic Decision-Making Modeling For Army Operation Command Post Entity, Kang Kai, Yongliang Zhang, Chenxi Li, Jintang Pan
Journal of System Simulation
Abstract: The paper presents a modeling method of dynamic decision-making for army operation command post entity based on the Bayesian Net (BN) to meet the demands of demonstrating the operational blue print and evaluating the plan with the support of subject matter experts and military rules. The method brings about the structured description for the decision-making rules, builds the BN model for battlefield situation, and actualizes the situation estimation based on the model of BN reasoning. Therefore it gives the reasonable analysis, the in-depth understanding and right dynamic estimation to the land battlefield dynamic situation, which embodies the complexity and …
An Autonomous Cognitive Model Simulating Basal Ganglia Mechanism, Zongshuai Li, Chen Jing
An Autonomous Cognitive Model Simulating Basal Ganglia Mechanism, Zongshuai Li, Chen Jing
Journal of System Simulation
Abstract: Aiming at autonomous cognition problem, applying the winner-takes-all(WTA) learning mechanism, using cortical-striatal synaptic modification principle in basal ganglia, as well as based on the operant conditioning reflex theory, the basal ganglia autonomous cognitive model is established, which is suitable for the cognitive learning with limited actions. Skinner's pigeons experiment was simulated by applying this bionic learning model, which showes a gradual process of adaptive learning. The simulation results reflect that the proposed cognitive model is effective and can be used in the balance learning for a self-balancing robot. In the premise of unknown robot mathematical model, the purpose of …
Cfd-Based Research On The Erosion Of The Fracturing Pump Valve Structure, Mo Li, Xiaobing Wang, Wang Jun, Guangcai Zhuang
Cfd-Based Research On The Erosion Of The Fracturing Pump Valve Structure, Mo Li, Xiaobing Wang, Wang Jun, Guangcai Zhuang
Journal of System Simulation
Abstract: In view of the characteristic of severe erosion and abrasion in the fracturing pump valve, CFD-based erosion and failure is simulated and computed. The distributed rule of the pump valve lift, times of stroke, the height of the seal and the sealing contact length at a certain moment are shown. By analyzing the characteristic of the flow field from the simulated result and the failure mechanism of the fracturing pump valve, it is concluded that the lift is smaller, the greater is the flow velocity, the high times of stroke will increase the flow rate and the lag …
Synthetic Evaluationmethod Based On Grey Evaluation Method And Analytic Hierarchy Model Theory, Xiangyu Sun, Chao Tao, Songyan Wang, Ma Ping
Synthetic Evaluationmethod Based On Grey Evaluation Method And Analytic Hierarchy Model Theory, Xiangyu Sun, Chao Tao, Songyan Wang, Ma Ping
Journal of System Simulation
Abstract: To solve the problems that judging matrix is complex and evaluation information from experts is not always objective in Analytic Hierarchy Process (AHP) method during the unstructured decision making application, a new synthetic evaluationmethod based on grey evaluation method and analytic hierarchy model theory (AHM) isproposed. GroupAHM method is used to judge the relative weight between any two of indexes based on relative weight evaluation information from experts in the relevant research field and grey evaluation method is used to synthesize the index evaluation information from experts. Evaluation result is obtained by mapping synthesizing result of relative property weight …
Optimum Design Of Remote Delivery Capsule’S Driving Mechanism Based On Electromagnetic-Permanent Magnet, Zhengping Lu, Xudong Guo, Tangcheng Xu, Ruihua Qin
Optimum Design Of Remote Delivery Capsule’S Driving Mechanism Based On Electromagnetic-Permanent Magnet, Zhengping Lu, Xudong Guo, Tangcheng Xu, Ruihua Qin
Journal of System Simulation
Abstract: To achieve fast, reliable and controllable drug delivery in the gastrointestinal lesions, a suitable delivery driving mechanism was studied. The structure of the driving mechanism was designedto overcome the magnetic force decaying rapidly with distance, whichcan satisfy the demands of the drug delivery for the large dose and long driving stroke.By combining the orthogonal test theory and the finite element simulation, the magnetic driving forcehas been calculatedforthe parameters of the electromagnetic coil and permanent magnet in different combinations of the values. The structure parameters of the electromagnetic coil and the permanent magnethave been optimizedto achieve the …
Modeling Of Nonlinear Industrial System At All Operating Conditions Based On State Tracking, Dong Ze, Erxin Yin
Modeling Of Nonlinear Industrial System At All Operating Conditions Based On State Tracking, Dong Ze, Erxin Yin
Journal of System Simulation
Abstract: From the prospective of industrial big data modeling, this paper presents a modeling method for nonlinear industrial system at all operating conditions based on state tracking. In view of large amount of historical data and the difficulty to screen the modeling data, a sliding window is designed to screen steady-state data. The fast calculation method for the standard deviation is deducted. The influence mechanism of unknown disturbance on the system is analyzed. The data segment, representing the system from dynamic state to stable state, is selected as the modeling data. A data-driven modeling algorithm, which can effectively eliminate the …
Mathematical Modeling And Simulation Of Hydraulic Governor For Marine Diesel Engine, Chen Jian
Mathematical Modeling And Simulation Of Hydraulic Governor For Marine Diesel Engine, Chen Jian
Journal of System Simulation
Abstract: The speed control and load limit of marine diesel engine are implemented by hydraulic governor, of which the characteristics directly determines the performance of generator set. Therefore, it is an important content of marine engine room simulator training to strengthen the students’ training and understanding of the working characteristics of the hydraulic governor. In the existing marine engine room simulators, the simulation model of hydraulic governor is too simple to carry out further training tasks. According to the working principle of hydraulic governor and the training purpose of marine engine room simulator, the mathematical model of UG-8 hydraulic governor …
Implement Objective Motion Cueing Test On The A320 Full Flight Simulator, Yang Yang
Implement Objective Motion Cueing Test On The A320 Full Flight Simulator, Yang Yang
Journal of System Simulation
Abstract: Pilot’s subjective evaluation has been used for motion cueing tuning and calibration for years, and widely recognized as the major criteria in civil full flight simulator qualification. Due to the diversity of human perception, it is impossible to reproduce the same motion cueing on different simulators. In order to objectively evaluate the A320 full flight simulator motion cueing system performance, an engineering practice has been carried out recently by implementation of the OMCT(Objective Motion Cueing Test)which was published by ICAO in 2015. It aims to measure the signal transport delay between the flight model and motion platform, through analyzing …
Vibration Simulation And Damping Ratio Optimization Of Seat Suspension System For High-Speed Rail, Changcheng Zhou, Yuewei Yu, Leilei Zhao
Vibration Simulation And Damping Ratio Optimization Of Seat Suspension System For High-Speed Rail, Changcheng Zhou, Yuewei Yu, Leilei Zhao
Journal of System Simulation
Abstract: According to the 1/4 body-seat vertical vibration model of high-speed rail, an optimal design simulation model for damping ratio of seat suspension was established. An optimal design mathematical model for damping ratio of seat suspension was built with the optimal ride comfort as the target. Taking the track vertical irregularity as input and the seat suspension vertical stroke as constraint condition, an optimization design method for damping ratio of seat suspension based on track excitation was presented. With a practical example, the damping ratio was designed and validated by simulation. The results show that the damping ratio value …
Channel Modeling And Simulation Of Wireless Underground Sensor Networks Based On Magnetic Induction Technology, Zhouzhou Liu, Shen Liang
Channel Modeling And Simulation Of Wireless Underground Sensor Networks Based On Magnetic Induction Technology, Zhouzhou Liu, Shen Liang
Journal of System Simulation
Abstract: Aiming at the problem of high path loss, huge dynamic changes of channel conditions and large antenna size of the electromagnetic wave communication channel in wireless underground sensor networks ( WUSN), the channel characteristics of magnetic induction (MI) in the process of WUSN transmission are studied and the transmission principle of harmonic source in soil strata is analyzed. The influence of the polarization direction of the coil and the eddy current loss coefficient on the channel model is analyzed by the transmission equivalent circuit diagram, and the influence of the change of the frequency and the distance on the …
Simulation Of Cyber-Physical Systems Of Systems:Some Research Areas -Computational Understanding, Awareness, And Wisdom, Tuncer Ören
Journal of System Simulation
Abstract: After a brief emphasis about the interconnected world, including Cyber-Physical Systems of Systems, the increasing importance of the decision-making by autonomous, quasi-autonomous, and autonomic systems is emphasised. Promising roles of computational understanding, computational awareness, and computational wisdom for better autonomous decision-making are outlined. The contributions of simulation-based approaches are listed.
Design-Model-Oriented Simulation For High-Speed Railway Dynamics, Xie Xing, Tang Zhao, Jiang Jie, Yisheng Zou, Guofu Ding
Design-Model-Oriented Simulation For High-Speed Railway Dynamics, Xie Xing, Tang Zhao, Jiang Jie, Yisheng Zou, Guofu Ding
Journal of System Simulation
Abstract: The traditional vehicle dynamics focuses more on numerical simulation, which separates from design model. LMS Virtual.Lab Motion - natively integrated in CATIA - is a multi-body dynamics package developed with CAA V5 for mechanical system, which is widely applied in engineering fields, such as aerospace, automotive, etc. But to expand to the dynamics of locomotive vehicle, the bottleneck problem of wheel/rail dynamic interaction should be solved. This paper employs CAA V5 and Motion UDF/UDS functions to create some special force elements which distinguish locomotive vehicles from general multibody system applications, and to integrate wheel/rail interaction solver module which determines …
Design Of Ground Online Flight Simulation System, Changgui Yu, Hongrui Xiong, Tian Kai, Chuntao Li
Design Of Ground Online Flight Simulation System, Changgui Yu, Hongrui Xiong, Tian Kai, Chuntao Li
Journal of System Simulation
Abstract: Aiming at the high cost and the immovable characteristics of the airplane iron bird test-bed and the semi-physical simulation laboratory, a highly integrated and movable system named as ground online flight is introduced. The dynamics and kinematics of unmanned aerial vehicle, sensors model, engines model and related subsystems are established and integrated into a device; the connections of 1553B, RS422, analog signal, discrete signal, pulse signal, PWM signal and so on are implemented. The wind model and the typical system faults are set up to study the robustness of the UAV, and test the UAV strategy which …
Spectralwidth Selection And Detectability Analysis Ofstarlight Refraction Sensor, Xianzhong Wang, Liu Yu, Minlan Tang, Limin Zhang
Spectralwidth Selection And Detectability Analysis Ofstarlight Refraction Sensor, Xianzhong Wang, Liu Yu, Minlan Tang, Limin Zhang
Journal of System Simulation
Abstract: Aiming at the engineering problem of starlight refraction sensor’s ability fordetecting the starlight refracted in atmosphere, the atmospheric attenuation coefficient of the visible and near infrared stellar dueto dispersion, molecular scattering, ozone absorption and so on are analyzed, which determines starlight refraction sensor’s spectral width and the visual magnitude difference equivalent with narrow spectral detection.The starlight refraction sensor’s detection ability and detection probability are estimatedbased on signal to noise ratio calculation and SNRanalysis. The simulation results give the visual magnitude difference equivalent with the atmospheric attenuation to the different atmospheric altitude, and the limiting magnitude of the different temperature …
Modeling And Analysis Of Operation Benefit For Electric Vehicle Battery Swapping Station, Weiqing Sun, Shunfeng Chen, Liu Tong, Xiaodong Wu
Modeling And Analysis Of Operation Benefit For Electric Vehicle Battery Swapping Station, Weiqing Sun, Shunfeng Chen, Liu Tong, Xiaodong Wu
Journal of System Simulation
Abstract: The operators of electric vehicle battery swapping stations (EVBSS) seek the maximization of benefit by optimizing the modeling. The changes of operating parameters such as battery swapping demand could affect EVBSS benefits. A linear programming model for EVBSS maximum benefit is established. Based on the sensitivity analysis, it is found that the EVBSS benefit is mainly affected by operating parameters such as battery swapping price, battery depreciation cost, electricity price, etc. For power grid, the sensitivity parameters of peak load shifting are charging-pile number and battery number. The optimal quantity of EVBSS internal infrastructure investment is analyzed. The establishment …
Research On Dynamic Framed Binary Tree Anti-Collision Algorithm For Rfid System, Xiaohong Zhang, Weihui Zhou
Research On Dynamic Framed Binary Tree Anti-Collision Algorithm For Rfid System, Xiaohong Zhang, Weihui Zhou
Journal of System Simulation
Abstract: Based on dynamic frame-slotted ALOHA algorithm and binary search tree algorithm, a dynamic framed binary tree (DFBT) anti-collision algorithm is presented to solve the problem of multi-tag collision in radio frequency identification (RFID). Vogt algorithm is adopted to estimate tags number, then the dynamic frame-slotted ALOHA (DFSA) algorithm is used to identify tags, and the unidentified tags are extracted and the highest collision bit is judged by readers. The highest collision tags are grouped by the collision bit within the binary search tree (BST) algorithm. Simulation results show that the DFBT algorithm can improve the identification efficiency and stability …
Relevance Analysis Of Deicing Parameters And Deicing Efficiency Of Aircraft Ground, Bin Chen, Liwen Wang
Relevance Analysis Of Deicing Parameters And Deicing Efficiency Of Aircraft Ground, Bin Chen, Liwen Wang
Journal of System Simulation
Abstract: Aircraft ground freezing could lead to potential danger and delay for flight. To alleviate these problems, the main method is to use the deicing fluids to clean ice or snow on the aircraft body, which lacks of reference of the deicing fluids parameters and efficiency. To study the effect of the deicing fluids parameters on the aircraft deicing efficiency, the deicing mechanism is analyzed.The black box mathematical model of the deicing process is generalized abstractly. The deicing process is divided into two subprocesses to establish the deicing model.The relevance between the deicing fluids parameters and deicing efficiency is studied …
Rvm Soft Sensing Model Based On Optimized Combined Kernel Function, Yanan Zhang, Huizhong Yang
Rvm Soft Sensing Model Based On Optimized Combined Kernel Function, Yanan Zhang, Huizhong Yang
Journal of System Simulation
Abstract: An RVM spft sensingmodeling method based onthe optimizedcombined kernel functionis proposed.In order to simultaneously get better prediction and sparsity, a fitness function synthesizing regression accuracy and sparsity is created while constructing a combined kernel functionfor RVM.The genetic algorithm is used to optimize the weights and kernel parametersof the RVMcombined kernel.The proposed method is used totomodela cleavage-recovery unit in the production process of Bisphenol-A.The results show that it can guarantee better sparsity andregression accuracy than the general SVM combinedkernel model andGA-RVM single kernel model.
Iterative Stochastic Resonance Demodulation Algorithm Of Frequency-Hopping Signal, Haixia Li, Yongfeng Ren, Yuhua Yang, Zhang Baili, Zhumei Tian
Iterative Stochastic Resonance Demodulation Algorithm Of Frequency-Hopping Signal, Haixia Li, Yongfeng Ren, Yuhua Yang, Zhang Baili, Zhumei Tian
Journal of System Simulation
Abstract: In order to improve the demodulation performance of frequency-hopping signals, this paper proposes a digital receiving algorithm based on the bistable stochastic resonance. With the digital samples sifting, the algorithm processes multiple frequency signals in one stochastic resonance system. The conversion from channel noise to useful signal is improved with multiple iterations of signal system. Finally, the local signal is designed to eliminate the frequency distortion in stochastic resonance system through the relevant calculation. Theoretical analysis and simulation results show that the algorithm can demodulate frequency-hopping signal, and its performance can be improved with the increase of sampling rate. …
Research On Two-Dimensional Imaging Algorithm Of Tomography For Near-Field Radiation Of Rf Objects, Shaohui Quan, Changtai Shi, Xuwang Cui, Bin Shi
Research On Two-Dimensional Imaging Algorithm Of Tomography For Near-Field Radiation Of Rf Objects, Shaohui Quan, Changtai Shi, Xuwang Cui, Bin Shi
Journal of System Simulation
Abstract: Two two-dimensional imaging algorithms of tomography are presented for observing different sections of RF objects. Two-dimensional images of the cross and coronal sections of the model are obtained based on the near-field radiation data calculated by FEKO. The effects of different variables on the imaging resolution are studied by changing near field scanning points and distance between the observation plane and RF objects. After the analysis of the simulation results, the proposed algorithms are compared with other imaging algorithms from different aspects. The advantages and limitations are discussed. The change of images and the corresponding solution are studied …
Simulation Of Missile Head Cover Separation And Landing Locations, Tian Hao, Mu Zhou, Huitong Li, Zhao Yang
Simulation Of Missile Head Cover Separation And Landing Locations, Tian Hao, Mu Zhou, Huitong Li, Zhao Yang
Journal of System Simulation
Abstract: Some missiles use head cover to protect the internal equipment during the launching process. In order to prevent the head cover from damaging the people or equipment after separation, researchers need to predict the landing position range and take protective measures. This paper designs a separation scheme for a missile head cover separation based on solid propellant gas generator and solid rocket. In this study, we establish a dynamic simulation model of head cover separation and falling procedure. The simulation calculation of the head cover location range considering multiple factors using Monte-Carlo method is developed. And the motional …
Dynamic Response Analysis Of Brushless Doubly-Fed Induction Generator Under Grid Fault, Li Bing, Liu Shi, Long Teng, Qiwei Duan
Dynamic Response Analysis Of Brushless Doubly-Fed Induction Generator Under Grid Fault, Li Bing, Liu Shi, Long Teng, Qiwei Duan
Journal of System Simulation
Abstract: Brushless doubly-fed induction generator has good system reliability due to the cancellation of the brush and slip ringcompared with DFIG.The low voltage ride-through (LVRT) capability is the key to realize the uninterrupted operation for the wind power generation.In this paper, the LVRT issuefor different grid faults is studied. The dynamic responses of the change of power winding magnetic linkage and the change of control winding voltage are analyzed when grid fault occurswith symmetrical fault and unsymmetrical fault respectively based on mathematical model of BDFIG. Theinstantaneous voltages of control winding are calculated and the dynamic responsesare simulated under different …
Simulation Research On Generator Sets Of Offshore Drilling Platform, Weiyi Wang, Xiao Lei, Dejun Lin
Simulation Research On Generator Sets Of Offshore Drilling Platform, Weiyi Wang, Xiao Lei, Dejun Lin
Journal of System Simulation
Abstract: Due to the poor working environment, the complex running conditions and the variety of facilities on offshore drilling platform, the entity experimental research on power system becomes hard and expensive. Based on the background of the offshore drilling platform, the model of eight generator sets is implemented. The simulations of generator sets interconnecting, operation with large load, as well as electric power system’s fault are done. The dynamic processes of each generator sets’ terminal voltage, speed and output power and power grid voltage are shown, which have a certain reference value for the parameter settings and the selection of …
Adaptive Generation Algorithm Of Tetrahedral Meshes Based On Density Field, Jidong Wang, Lipeng Fan, Mingyong Pang
Adaptive Generation Algorithm Of Tetrahedral Meshes Based On Density Field, Jidong Wang, Lipeng Fan, Mingyong Pang
Journal of System Simulation
Abstract: We present an algorithm for adaptively generating tetrahedral mesh by constructing the density field of a surface model. A uniform sampled point set is first generated inside the axial bounding box of the surface model. A non-uniform density field is defined according to the surface boundary of the model. Under the control of the density field, the centroidal Voronoi tessellation of the point set is constructed by using iterative method, and the distribution of the point set is optimized adaptively via dynamically adding or deleting points. Taking the points inside the surface model as the insertion points, a tetrahedral …
Dynamics Simulation Of Breaking Underwater Cable Based On Lumped Mass Method, Zhongxian Zhu, Yin Yong, Helong Shen
Dynamics Simulation Of Breaking Underwater Cable Based On Lumped Mass Method, Zhongxian Zhu, Yin Yong, Helong Shen
Journal of System Simulation
Abstract: In order to numerically simulate and predict the dynamics behavior of a breaking cable, the dynamics model of the underwater cable is built up based on the lumped mass method, and the classical Runge-Kutta method is used to solve the model. The breaking cable is simulated by exerting appropriate boundary conditions. The dynamics behaviors of immediately and slowly breaking cable are studied. The results indicate that the velocity of the nodes around the breaking point reaches the maximum in a very short time, and then the disturbance propagates outside in form of elastic-wave. Tension and velocity distribute more uniformly …
Invulnerability Simulation Analysis Of Compound Traffic Network In Urban Agglomeration, Chengbing Li, Wei Lei, Tianwei Lu, Gao Wei
Invulnerability Simulation Analysis Of Compound Traffic Network In Urban Agglomeration, Chengbing Li, Wei Lei, Tianwei Lu, Gao Wei
Journal of System Simulation
Abstract: To ensure the security operations of urban agglomeration transportation system, the perspective on compound network is used to explore the invulnerability of urban agglomeration traffic network. The site mapping method is used to build the model of weighted compound traffic network in city agglomeration. The traditional invulnerability metrics is revised and the attack strategies are determined according to the structure of the network. Hu-Bao-E city agglomeration is taken as an example to build the weighted compound traffic network model which is composed of road network and rail transit network, simulating the invulnerability and identifying key nodes in the …
Simulation Of Taxi Passenger Travel Mode Considering The Influence Of Online Booking Taxi, Cao Yi, Yanjin Li, Luo Xia
Simulation Of Taxi Passenger Travel Mode Considering The Influence Of Online Booking Taxi, Cao Yi, Yanjin Li, Luo Xia
Journal of System Simulation
Abstract: To reflect a systematic account of the impact online booking taxi and cruise taxi under the condition of information, the travelling mode choice of taxi passengers was researched. The influence factors of travelling mode choice of taxi passengers were analyzed and the time values related to passenger’s own characteristics were evaluated. The functions of waiting time of online booking taxi passengers and cruise taxi passengers were formed by investigating the difference of searching behavior. Through using simulation method, the priority for online booking taxi, cruise taxi and private cars was obtained .The results showed that the online booking …
Linear Design And Simulation Analysis For Harmonic-Distance Rubber Bushing Of Pdm, Tong Hua, Guoyin Chen, Xiaohua Zhu
Linear Design And Simulation Analysis For Harmonic-Distance Rubber Bushing Of Pdm, Tong Hua, Guoyin Chen, Xiaohua Zhu
Journal of System Simulation
Abstract: For the problem of fatigue failure in stator rubber bushing of PDM, which reduces motor efficiency and restricts the rate of penetration, a numerical model of PDM’s stator-rotor is established. The thermal coupling problem of rubber bushing working in a well is analyzed. The displacement, temperature and stress distribution of rubber bushing under different conditions and interferences are calculated. A new harmonic-distance rubber bushing was designed based on the structure of rubber bushing, and a finite element simulation on it is taken. The research indicates that the harmonic-distance rubber bushing not only has the advantage of equal-distance rubber bushing, …
From Situation Cognition Stepped Into Situation Intelligent Cognition, Zhu Feng, Xiaofeng Hu, Wu Lin, Xiaoyuan He, Xuezhi Lü, Liao Ying
From Situation Cognition Stepped Into Situation Intelligent Cognition, Zhu Feng, Xiaofeng Hu, Wu Lin, Xiaoyuan He, Xuezhi Lü, Liao Ying
Journal of System Simulation
Abstract: Aimed at operational situation cognition and some relevant problems under the background of the Joint-Tactical, some deep researches are carried out in this paper. The concept models of combat situation cognition and situation intelligent cognition are proposed respectively, and some related concepts are clarified. The situation intelligent cognition technology framework is proposed, and five key problems which should be solved are analyzed, and the possible technical routes are given. These research contents and achievements build a foundation for stepping into the situation intelligent cognition from combat situation cognition.
Modeling And Simulation Of Ship Maneuvering Motion Based On Non-Uniform Flow And Shallow Water Effect, Sichen Tong, Xiaoya Tang, Zhang Huan
Modeling And Simulation Of Ship Maneuvering Motion Based On Non-Uniform Flow And Shallow Water Effect, Sichen Tong, Xiaoya Tang, Zhang Huan
Journal of System Simulation
Abstract: To reflect and simulate the flow condition and ship attitude in mountainous river, a 3-DOF ship motion mathematical model based on open channel non-uniform flow and shallow water effect is put forward. Analysis of the numerical simulation shows that with the decrease of depth-draft ratio h/d, the ship direct navigation speed decreases, the shallow water effect and the turning diameter increases. Meanwhile, the Z motion fluctuation amplitude and the oscillation period increase with the decrease of h/d, which means the decrease of the rudder effect and maneuverability. Application of the model in a case study shows that the proposed …