Policies Conflict Detection Algorithm Coordinated Defense-Oriented Of Firewall And Ids/Ips,
2020
1. Department of Engineering, Xiangyuan Hexin Power Co. Ltd. , Taiyuan 030001, China; ;
Policies Conflict Detection Algorithm Coordinated Defense-Oriented Of Firewall And Ids/Ips, Qiu Song, Jiao Jian, Dongyang Zhang
Journal of System Simulation
Abstract: Coping with the distributed and complex threaten of networking attack, the requirement of coordinated defense of Firewall and IDS/IPS are becoming more and more urgent. As the existence of uncertainty of the judgment of Intrusion performed by IDS/IPS, Firewall and IDS/IPS often perform contradict action, that the same package matched the both rules of Firewall and IDS/IPS, and conflict arose, which would lead to illegal access control or deny of legal access control. The policies conflict detection algorithm of coordinated defense of Firewall and IDS/IPS were researched. The semantic models of firewall policy and IDS/IPS policy were proposed, the …
High Accuracy And Stable Transient Process Design Of Orbit Control For Space Rendezvous And Docking,
2020
Department of Automation, University of Science and Technology of China, Hefei 230027, China;
High Accuracy And Stable Transient Process Design Of Orbit Control For Space Rendezvous And Docking, Kaikai Li, Weiwei Shang
Journal of System Simulation
Abstract: In the docking phase of orbit control task of space rendezvous and docking, smooth without overshoot, good robustness and fuel-saving control are required. To this end, a transient process for orbit control was proposed, and new controllers were designed on the basis of the transient process for the space rendezvous and docking. The ultimate goal was refined to the gradual arrival goal to build the transient process between the initial coordinate and the target coordinate of the system. The output of the transient process was designed as a smooth S-type curve. Three different orbit controllers of space rendezvous and …
Wood Structure Nondestructive Detection Based On Wavelet Analysis Ant-Colony Bp Network,
2020
1. School of electricity & information Engineering, Central South University of Forestry & Technology, Changsha 410004; ;
Wood Structure Nondestructive Detection Based On Wavelet Analysis Ant-Colony Bp Network, Guoxiong Zhou, Xianyan Zhou, Jiejun Wang, Te Huang
Journal of System Simulation
Abstract: In view of the wood component glue line defect, a method of wood structure nondestructive detection was proposed based on ant colony BP neural network. The wood specimens was tested to obtain the test signal by ultrasonic testing instrument, in order to eliminate the testing effect of the tester gain control and defect size, angle variation on the test defect echo amplitude, the defect signal amplitude was needed to normalization. The wood component decomposition of ultrasonic signals was de-composite to different frequency channels by the domain band-pass characteristics of the wavelet frequency. By extract characteristic of the original signal …
Modeling Method Of Airborne Display And Control System Based On Meta-Model Features,
2020
Naval Aeronautical Engineering Institute Qingdao Branch, Qingdao 266041, China;
Modeling Method Of Airborne Display And Control System Based On Meta-Model Features, Zhile Wang, Jungan Wei, Yu Hui
Journal of System Simulation
Abstract: Analysed of the current integrated avionics display and control system simulation problems, discussed the system’s function, composition and the simulation design method detailedly. Proposed a reconfigurable modeling method of meta-model features according to the requirements of the simulator develop. Make full used of the feature extraction method meta-model theory, the various elements that make up the system and their relationship was classified and feature abstract and description reasonably, built the meta-model of display and control system. Created the display and control system’s graphic elements, characters and Human-computer interactive interface by GL Studio. Using object-oriented techniques to make reusable class …
Simulation And Evaluation On Handling Stability Of Wheeled Self-Propelled Gun Based On Virtual Prototype,
2020
1. China Army Command College, Shijiazhuang 050084, China; ;2. Mechanical Engineering College, Shijiazhuang 050003, China;
Simulation And Evaluation On Handling Stability Of Wheeled Self-Propelled Gun Based On Virtual Prototype, Huibin Hu, Shuxiao Chen, Linlin Li, Liqiao Liu, Lijun Cao
Journal of System Simulation
Abstract: Based on the summary of usual handling stability research methods, a new kind of simulation and evaluation technology for wheeled Self-Propelled Gun based on virtual prototype and actual equipment test was put forward. In MSC.ADAMS/Car environment, virtual prototypes of suspension, tire, steering, engine, transmission subsystems and wheeled Self-Propelled gun were established. Actual equipment test and simulation based on virtual prototype of invariable radius turning test were carried out. The creditability and accuracy of virtual prototype were verified by comparing the simulation results and the test data. Steady turning characteristics were taken as example to illustrate the handling stability …
Simulation Study On Damage Localization Of Large Generator Stator Insulation Based On Guided Waves,
2020
School of Electronics and Information Engineering, Tongji University, Shanghai 201804, China;
Simulation Study On Damage Localization Of Large Generator Stator Insulation Based On Guided Waves, Li Hao, Ruihua Li, Hu Bo, Pan Ling, Qiyi Guo
Journal of System Simulation
Abstract: A stator insulation damage localization method based on guided waves was proposed. The dispersive curve was obtained by solving the Rayleigh-Lamb equations. Finite structure models of four typical groundwall insulation damage, i.e. void, delamination, longitudinal and transverse crack were established by FEM software Abaqus, in which the excitation, acquisition and propagation properties of guided wave were numerical simulated. Based on that, wavelet scalogram was used to extract the flight time of damage-scattered wave to obtain the insulation damage location. Analysis was conducted to compare the location precision under each wave modes. Simulation results indicate that the method is …
Radar Countermeasures Simulation Factor Analysis Method Of Fidelity-Oriented,
2020
Luoyang Electronic Equipment Test Center of China, Luoyang 471003, China;
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,
2020
1. National CIMS Engineering Research Center, Tsinghua University, Beijing 100084, China; ;
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,
2020
1. Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, NUIST, Nanjing 210044, China; ;3. Sichuan Meteorological Bureau, Chengdu 610072, China;
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),
2020
1. MOE Key Laboratory for Urban Transportation Complex System Theory and Technology, Beijing Jiaotong University, Beijing 100044, China; ;
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,
2020
School of Aeronautics, Beihang University, Beijing 100191, China;
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,
2020
1. College of Geoscience and Surveying Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China; ;
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,
2020
1. Institute of Cryptographic Engineering, Information Engineering University, Zhengzhou 450000, China; ;
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,
2020
1. Department of Computer Science, Hangzhou Dianzi University, Hangzhou 310018, China; ;
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,
2020
1. College of Information Management, Shanxi University of Finance & Economics, Taiyuan 030006, China; ;
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,
2020
1. Key Laboratory of Wireless Sensor Network & Communication, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200051, China; ;2. Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai University, Shanghai 201899, China; ;
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,
2020
School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, China;
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,
2020
1. School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; ;
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,
2020
1. School of Computer and Information, Anqing Normal College, Anqing 246001, China; ;
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,
2020
Key Laboratory of Advanced Process Control for Light Industry (Ministry of Education), Jiangnan University, Wuxi 214122, China;
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 …
