Slashing Quality Index Modeling And Simulation Based On Data Dispersion Clustering,
2020
1. School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China;;
Slashing Quality Index Modeling And Simulation Based On Data Dispersion Clustering, Yuxian Zhang, Xiaoyi Qian, Dong Xiao, Jianhui Wang
Journal of System Simulation
Abstract: For the sensitivity of noise and outliers data in the typical partitioning clustering algorithm, a clustering algorithm based on data dispersion was proposed. The data dispersion was defined and introduced to a non-Euclidean distance. The similarity metric was established, and the data clustering was realized. The optimal clustering number was obtained by the validity function based on improved partition coefficient. Then the proposed clustering algorithm was applied to quality index model in slashing process. A size add-on quality index model was built by radial basis function neural networks. The node number of hidden layer was determined and the center …
Using Raster Lattices To Build Terrain Attribute Of Wargame Map,
2020
1. Institute of Geospatial Information, Information Engineering University, Zhengzhou 450052, China;;2. Institute of Remote Sensing and Digital Earth Chinese Academy of Sciences, Beijing 100081, China;
Using Raster Lattices To Build Terrain Attribute Of Wargame Map, Jinming Zhang
Journal of System Simulation
Abstract: Wargame map is a sketchy description of geographical environment under certain conditions. It is used to assist commanders or operational models to locate spatial positions and to determine spatial attributes. The former process is called geometric modeling and the latter attribute modeling, and the combination of which is known as Wargame Map Modeling. A Raster Lattice Algorithm for attribute modeling was proposed, which could effectively reduce modeling complexity and improve modeling efficiency. The basic process of attribute modeling and discussing its difficulty was described, i.e., the calculation of the covered areal ratio between hexagon and the geographical environment element. …
Nonlinear H∞ Control For Marine Speed With Parameter Perturbation And Ambient Interference,
2020
1. Reliability Engineering Institute, School of Energy and Power Engineering, Wuhan University of Technology, Wuhan 430063, China;;2. Key Laboratory of Marine Power Engineering ? Technology (Ministry of Communications), Wuhan University of Technology, Wuhan 430063, China;;3. National Engineering Research Center for Water Transport Safety, Wuhan University of Technology, Wuhan 430063, China;;
Nonlinear H∞ Control For Marine Speed With Parameter Perturbation And Ambient Interference, Yupeng Yuan, Zhang Meng, Xinping Yan, Guo Bo, Jianglong Wan
Journal of System Simulation
Abstract: In order to improve the automation level and enhance the navigation safety of ships, stable control for ship speed is very important. Good control effect is difficult to obtain based on the conventional control method since the marine speed control system is a time-varying parameters and nonlinear complicated propulsion system. The uncertainty of the system parameters and the effect of environment such as winds, waves and currents were considered adequately in ship motion mathematical model with disturbing force. The mathematic model was linearized accurately with the differential geometry method. Then the nonlinear H∞ controller was designed according to …
Simulation And Analysis Of Airborne Phase Array Weather Radar Reflectivity,
2020
1. Sichuan Meteorological Sounding Data Center, Chengdu 610072, China;;
Simulation And Analysis Of Airborne Phase Array Weather Radar Reflectivity, Wang Lei, Chaopeng Yu, Liu Ping
Journal of System Simulation
Abstract: The relation between radar parameters such as radar gain, beam width and impulse width and radar reflectivity based on the parameters of airborne phase array weather radar at X-band were proposed. Combined with weather radar equation correction and flight parameters, horizontal sector scanning and vertical sector scanning reflectivity data of airborne phased array weather radar were simulated based on new generation weather radar (CINRAD/SA) reflectivity. The results show that along the radial direction, the distance resolution of airborne phase array radar used impulse compress technology is higher than new generation weather radar and along the shear direction, because antenna …
Study Of Light Extraction Efficiency For Thin-Film-Flip-Chip Light-Emitting Diodes With Periodic Spheroids,
2020
School of Information Science and Engineering, Shandong University, Jinan 250100, China;
Study Of Light Extraction Efficiency For Thin-Film-Flip-Chip Light-Emitting Diodes With Periodic Spheroids, Xiaojie Yu, Li Kang, Fanmin Kong, Qingyang Yue
Journal of System Simulation
Abstract: The enhancement of light extraction efficiency for thin-film-flip-chip light-emitting diodes (LED) based gallium nitride (GaN) with triangular lattice periodic ellipsoid was studied. Three dimensional finite difference time domain methods (3D-FDTD) were applied to analyze the structural parameters (the period and ellipsoid height) effects on thin-film-flip-chip LED light extraction efficiency. FDTD numerical results prove that ellipsoids structure can improve LED light extraction efficiency and impair guide mode. Method rigorous coupled wave (RCWA) is adopted to analyze diffraction characteristics. This research results show that optimization of the periodic ellipsoid can improve thin-film-flip-chip LED light extraction efficiency increased by 2.8 times.
Prediction Of Energy Efficiency Of Nc Machine Tools Based On Recursive Method With Discounted Measurements,
2020
Institute of Electrical Automation, Jiangnan University, Wuxi 214122, China;
Prediction Of Energy Efficiency Of Nc Machine Tools Based On Recursive Method With Discounted Measurements, Cai Lei, Wang Yan, Zhicheng Ji
Journal of System Simulation
Abstract: Aiming at the problem that the energy efficiency of numerical control machine tool is difficult to obtain directly, a new method combined with the recursive method with discounted measurements was presented to predict the energy efficiency of machine tool. The estimation model of the cutting power was given in view of the power balance equation of the machine tool main drive system and the additional load loss function, further taking into account the additional load loss coefficients in model could not be directly measured, the recursive method with discounted measurements was adopted to identify the additional load loss coefficients …
Invasive Weed Optimization Algorithm Combined With Chaotic Mutation And Analysis Of Its Property,
2020
1. Business School, University of Shanghai for Science and Technology, Shanghai 200093, China;;2. Zhangjiagang Campus, Jiangsu University of Science and Technology, Zhangjiagang 215600, China;
Invasive Weed Optimization Algorithm Combined With Chaotic Mutation And Analysis Of Its Property, Huang Xia, Chunming Ye, Cao Lei
Journal of System Simulation
Abstract: Inspired by the reproductive aggressive behavior of weeds in nature, invasive weed optimization algorithm (IWO) was developed as a novel bionic swarm intelligence optimization algorithm. An improved IWO algorithm was proposed on the basis of analyzing bionic principle and limitations of basic IWO, which applied an initialization strategy based on chaotic opposition-based learning, increased the diversity of the population through the mutation operator, and enhanced its ability to jump out of local optimal value by chaotic search around current elites. Simulation results for benchmark functions show that the proposed algorithm has improved optimization property compared with IWO, as an …
Stylization Rendering Algorithm Based On Interactive Graph Cuts Method For Image Segmentation,
2020
1. Department of Animation, Yunnan Normal University, Kunming 650092, China;;
Stylization Rendering Algorithm Based On Interactive Graph Cuts Method For Image Segmentation, Zhao Yang, Guowu Yuan, Dangen Xie, Xu Dan
Journal of System Simulation
Abstract: The image is cut into two parts, the object and background, using the Graph Cuts interactive image segmentation algorithm. Through interactive image segmentation, user segmented image into a foreground region and a background region. For background area, a variety of non-photorealistic rendering algorithm was designed, which could render the original image into artistic images with other cartoon painting, pencil drawing or painting style. For foreground region, the algorithm maintained its feathers unchanged. By merging foreground and background areas, the artistic images were obtained with variety styles. Experiments show that the algorithm designed can get the desired result for processing …
Cooperative Controller Design For Redundant Dual Arm Robot,
2020
1. Department of Automation, University of Science and Technology of China, Hefei 230026, China;;2. Institute of Advanced Manufacturing Technology Hefei Institute of Physical Science, Chinese Academy of Sciences, Changzhou 213164, China;
Cooperative Controller Design For Redundant Dual Arm Robot, Meiling Wang, Minzhou Luo
Journal of System Simulation
Abstract: Cooperative operation for a redundant dual arm robot can be divided into three modes, namely, independent mode, full constrained cooperative working mode and partly constrained cooperative working mode. The dynamic equations of both dual arms and the interactions between dual arms and the operating objects were established and derived based on the three modes, and a unified formulation was obtained. With focus on motion and force of the desired task being operated, a unified controller was designed which could be carried out based on two dynamic model based controllers, namely feedforward controller and computer torque controller. Simulations of dual …
Multiresolution Scene Matching Algorithm For Infrared And Visible Images Based On Non-Subsampled Contourlet Transform,
2020
1. College of Information Engineering, Henan University of Science and Technology, Luoyang 471023, China;;
Multiresolution Scene Matching Algorithm For Infrared And Visible Images Based On Non-Subsampled Contourlet Transform, Liu Gang, Guangyu Wang, Zhou Heng, Mingjing Wang
Journal of System Simulation
Abstract: Aiming at scene matching problem for taking infrared image as the actual data and the visible image as the referenced data, a multiresolution matching algorithm was proposed based on non-subsampled contourlet transform (NSCT). By using the transform of phase congruency transform, the difference of grayscale and contrast between infrared image and visible light image was weakened. Subsequently, the two types of images were separately transformed into non-subsampled contourlet domain and the proposed method took the Krawtchouk invariant moment as matching feature. The presented method, which used the improved genetic algorithm (GA) as searching strategy which conquered the precocious phenomenon, …
Modeling And Motion Analysis Of Multi-Bodies Dynamic Of Unmaned Parafoil Vehicle,
2020
Department of UAV Engineering, Ordnance Engineering College, Shijiazhuang 050003, China;
Modeling And Motion Analysis Of Multi-Bodies Dynamic Of Unmaned Parafoil Vehicle, Zhang Hao, Zili Chen, Jingang Qiu
Journal of System Simulation
Abstract: Unmanned Parafoil Vehicle (UPV) has gradually become a hotspot in the flexible wing vehicle research filed for its superior fight performance and advantages in application. An eight degrees of freedom (DOF) nonlinear dynamic model of UPV in mechanism law was proposed, aiming at the structure characteristics of the two flexible connections, and considering the added mass of canopy and the relative motion of two bodies. The response of model to different levels of thrust changes was simulated and analyzed, pulling a single steering line and pulling the left and right steering lines of canopy symmetrically on the steady state …
Repairable K/N Voting System Life Situation Model Analysis And Simulation From Time Response,
2020
1. School of Mechanical Engineering, Guizhou University of Engineering Science, Bijie 551700, China;;
Repairable K/N Voting System Life Situation Model Analysis And Simulation From Time Response, Yongfeng Fang, Jianjun Chen
Journal of System Simulation
Abstract: For the k of k/n system is given according to the one's experience in the current, the probability of the failure of the singular system components was given according to the stress-strength interference theory and the load distribution of the component withstand. The dynamic reliability prediction model of the repairable k/n system was established by using probabilistic differential equations and by the repairable system components moving in reliable and failure. The equation was solved and their answers were shown to give the precisely k when the k would be determined. The model shows accuracy and feasibility …
Research On Cholecystectomy Virtual Surgery Simulation Training Platform,
2020
1. School of Computer & Information Science, Anhui Polytechnic University, Wuhu 241000, China;;
Research On Cholecystectomy Virtual Surgery Simulation Training Platform, Wang Jun, Liu Dong
Journal of System Simulation
Abstract: The main performance factors in virtual surgery system with immersion are real-time, realistic deformation and smooth feel handle. A kind of cholecystectomy simulation training platform with force feedback feel was built, putting forward a kind of collision detection method based on Capsule-Sphere mixture model of different model with different bounding box in the real-time and a kind of mass-spring deformation method based on mesh-skeleton model in the force-deformation, and being tested on the virtual surgery force feedback device in prophase research. The experimental results show that the two modes are applied to the virtual cholecystectomy simulation and the platform …
Wood Structure Nondestructive Detection Based On Singular Spectrum Analysis And Svm,
2020
1. School of Electricity & information Engineering, Central South University of Forestry & Technology, Changsha 410004, China;;
Wood Structure Nondestructive Detection Based On Singular Spectrum Analysis And Svm, Guoxiong Zhou, Aibin Chen, Xianyan Zhou
Journal of System Simulation
Abstract: In view of unknown defect of wood component defect, a method of wood structure nondestructive recognition based on Singular spectrum analysis and SVM was proposed. The wood specimen 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 abnormal fluctuation was to filter and characteristic of the original signal was extracted by singular spectrum analysis, and SVM could train the parameters and distinguish the wood defects. Simulation results show that the proposed method …
Analysis And Simulation Of A Class Of Time-Varying Wireless Networked Control Systems,
2020
1. College of Electrical Engineering Shanghai University of Electric Power, Shanghai 200090, China;;
Analysis And Simulation Of A Class Of Time-Varying Wireless Networked Control Systems, Weihua Deng, Minrui Fei
Journal of System Simulation
Abstract: The problem of stabilization was investigated for a class of discrete time-varying systems over a physical IEEE 802.11b wireless channel. The wireless network-induced delays were characterized by an inverse Gaussian distribution model (IGDM) and the time-varying nature was depicted by uncertain parameter model. The model-based state feedback controller was designed to compensate the influence of delays and time-varying nature. And the stochastic stabilisability of discrete time-varying networked control system was analyzed and the solution of controller was given in the form of linear matrix inequalities (LMIs). The effectiveness of the proposed methods was illustrated by numerical simulation examples.
Segmentation And Recognition Of Hand-Drawn Situation Maps,
2020
1. Science and Technology on Complex Electronic System Simulation Laboratory, Equipment Academy, Beijing 101416, China;;2. Unit 75711 of PLA, Guangzhou 510515, China;;
Segmentation And Recognition Of Hand-Drawn Situation Maps, Deng Wei, Lingda Wu, Yougen Zhang, Yang Chao
Journal of System Simulation
Abstract: Most of current research on online sketched military symbol recognition concerns the isolated samples. In pen-based situation marking systems, users prefer segmenting and recognizing the full sketched situation maps. However, it is a more difficult problem. The characteristics of hand-drawn situation maps and difficulties to segment them were analyzed, and a dynamic programming-based approach was proposed. A hand-drawn situation map was segmented coarsely by minimum spanning tree-based stroke clustering. The candidate segmentation path was evaluated by synthesizing geometric analysis and isolated symbol classifier together, using confidence transformation and fusion. The dynamic programming algorithm was used to search the …
Robust Steerable Frequency Invariant Beamformer Design Based On Srv-Cls,
2020
1. Jiangsu Province Key Laboratory of Meteorological Observation and Information Processing in Nanjing University of Information Science & Technology, Nanjing 210044, China;;2. Atmospheric Environment and Equipment Technology Synergy Innovation Center, Nanjing 210044, China;
Robust Steerable Frequency Invariant Beamformer Design Based On Srv-Cls, Suting Chen, Zhang Wei
Journal of System Simulation
Abstract: The frequency invariant beamformer (FIB) has important applications in wideband array signal processing. Conventional FIB design approaches are usually proposed without considering the mismatches in microphone array characteristic, which leads to the performance of the FIBs degrading in practical applications. Therefore, a robust steerable frequency invariant beamformer design approach based on spatial response variation constrained least squares (SRV-CLS) was proposed. It combined the SRV-CLS FIB design approach with classical robust beamforming algorithm, and added the microphone characteristics as robust favor in the cost function. The proposed approach could work well in the presence of microphone mismatches, ensured the frequency …
Virtual Reality Game For Head Rehabilitation Based On Kinect,
2020
1. Tibetan Information Technology Research Center, Tibetan University, Lhasa 850000, China;;
Virtual Reality Game For Head Rehabilitation Based On Kinect, Shutao Shen, Gao Fei, Xu Ning
Journal of System Simulation
Abstract: The application of virtual reality in the rehabilitation has been extensively studied, which helps patients after a stroke independently perform daily living activities, while saving time, money and other costs. This study used Microsoft Kinect virtual reality game to assess the movement of the users. The game required movement outside of the head, torso and arms. In nine games exercise, the average and maximum amount of movement remained unchanged. However, with the increase of exercise, the frequency of head movement increased. The results show that by head movement, video games can be used to balance the posture rehabilitation, …
Study Of Synchronization For Fractional-Order Hyperchaotic System And Its Application In Secure Communication,
2020
School of Electronic Information and Automation, Tianjin University of Science and Technology, Tianjin 300222, China;
Study Of Synchronization For Fractional-Order Hyperchaotic System And Its Application In Secure Communication, Xue Wei, Jinkang Xu, Hongyan Jia
Journal of System Simulation
Abstract: A unidirectionally coupled synchronization method was adopted to design and implement the synchronization for the reported commensurate fractional-order hyperchaotic system, and its correctness and effectiveness were analyzed in theory. Moreover, taking an example of 3.6-order hyperchaotic system, analog circuits were designed to implement the fractional-order hyperchaotic system and its unidirectionally coupled synchronization with the frequency-domain approximation method based on Bode diagram. By conducting the circuit implementation, it is found that the results of the circuit implementation are in good agreement with those of the numerical simulation, which demonstrates the feasibility of the synchronization. On this basis, a secure communication …
Simulation Study On External Explode Of Large Equivalent Charge On Large Buildings,
2020
1. The Chinese People's Liberation Army 95856, Nanjing 210028, China;;
Simulation Study On External Explode Of Large Equivalent Charge On Large Buildings, Weiping Zhao, Xiankun Ge, Chuanwu Liu, Fengchun Zhu
Journal of System Simulation
Abstract: The particle algorithm in AUTODYN, Smoothed Particle Hydrodynamics (SPH), was used to simulate dynamic damage of the external explosion on large buildings, which provided a visual effect. The dynamic damage details of reinforced concrete and brick masonry structure at different time were proposed by the simulation of single component. Additionally, the overpressure of shock wave, caving velocity and kinetic energy were obtained. It shows that the caving can speed up to a maximum value of 152 m/s with the kinetic energy of 18 000 J, that means a great damage to personnel and equipment in the building. Under …
