Application Of Improved Particle Filter And Wavelet Packet In Turbine Vibration Diagnosis,
2020
1. School of Electronic and Information, Tongji University, Shanghai 201804, China;;2. College of Automation Engineering,Shanghai University of Electric Power, Shanghai 200090, China;;
Application Of Improved Particle Filter And Wavelet Packet In Turbine Vibration Diagnosis, Xia Fei, Shuotao Hao, Zhang Hao, Daogang Peng
Journal of System Simulation
Abstract: A fault diagnosis method of improved particle filter and wavelet packet analysis was proposed in the application of turbine vibration. There was a sample degradation problem in the re-sampling stage of traditional particle filter. And a re-sampling algorithm which was a weight sorting and the survival of the fittest to obtain the improved particle filter was studied. The signal was filtered by the improved particle filter. Then wavelet packet analysis was used to extract the features from the noise reduction signal. Finally the fault diagnosis results were obtained by using SVM. It is shown that the fault identification rate …
Multimedia Annotation Refinement Based On Contextual Information Diffusion,
2020
School of Computer and Information Technology, Northeast Petroleum University, Daqing 163318, China;
Multimedia Annotation Refinement Based On Contextual Information Diffusion, Tian Feng, Fuhua Shang
Journal of System Simulation
Abstract: A data driven multimedia annotation refinement method based on dataset contextual information diffusion was proposed. The label contextual graph was constructed, and the label correlation can be diffused on textual label space; Multimedia object content relevant graph was constructed. Label contextual graph and multimedia object content relevant graph were mutually reinforced and formulated into a regularized framework. The proposed method incorporated both multimedia content correlation and label contextual information, and the optimization process was solved by approximate solution algorithm. The experimental results on real world dataset show that the proposed method can obviously improve the annotation performance.
Friend Recommendation Based On Analysis Of Users’ Emotions And Text Semantics,
2020
Chongqing Key Laboratory of Computational Intelligence, Chongqing University of Posts and Telecommunications, Chongqing 400065, China;
Friend Recommendation Based On Analysis Of Users’ Emotions And Text Semantics, Qun Liu, Hongtao Sun, Lianghao Ji
Journal of System Simulation
Abstract: The interests and emotions of users are often varied in their real lives. On the contrary, some other features (such as the profiles) of micro-blog are always unchangeable and they cannot describe the users’ characteristics very well. Then a novel friend recommendation method merged users’ text semantics with emotions was proposed. In the model, in order to compute the similarity of friends, some text content features from users’ micro-blog are extracted and time factor was introduced. Then further consideration on the users' emotional characteristics was taken to compute the users’ similarity through analyzing the emotional words in micro-blog text. …
Scalable Semantic Web Services Architecture Design And Service Discovery,
2020
1. Command College of People's Armed Police, Tianjin 300250, China;;2. Institute of Command Information Systems, PLA University of Science and Technology, Nanjing 210007, China;
Scalable Semantic Web Services Architecture Design And Service Discovery, Xiaoxing Niu, Zhixue Wang, Minggang Yu
Journal of System Simulation
Abstract: With the rapid development of computer and network technologies, the variety and quantity of Web Services on the network is also increasing. How to find the requiring services quickly and accurately becomes increasingly important. In order to solve the problems with traditional Web Services architecture, such as poor scalability and lacking of semantic information, a scalable semantic Web Services architecture was proposed, the architecture could meet the requirements to construct distributed and large-scale systems based on SOA for modern enterprises. Service publication and deletion algorithms of the architecture were studied, and dynamic adjustment algorithms of the architecture was studied …
Wechat Information Dissemination Mechanism And Simulation Research Based On Field Theory,
2020
Beijing University of Technology, School of Economics and Management, Beijing 100124, China;
Wechat Information Dissemination Mechanism And Simulation Research Based On Field Theory, Xiaohong Shan, Panpan Jia, Xiaoyan Liu
Journal of System Simulation
Abstract: As the popular social networking platform, the wechat network has the rapid impact on people's way of life. By analyzing the factors that influence the information dissemination among wechat, constructing the wechat information diffusion field by building three-dimensional coordinate, the information diffusion model was established based on the field theory. The process of information dissemination was simulated from three angles by using Netlogo simulation platform, that is the factors affecting the information dissemination, the original proportion of information source users, and different wechat network structures. Simulation results show that the more similar characteristics of the user, the dissemination results …
Broadband Beamforming Method For Circular Sensor Array,
2020
School of Electronic Engineering Xian Shi You University, Xi’an 710065, China;
Broadband Beamforming Method For Circular Sensor Array, Gan Tian
Journal of System Simulation
Abstract: The beamforming method based on mode decomposition is a kind of very good beamforming method for circular sensor arrays, in order to apply it to the broadband beamforming, An against white noise robust beamforming method was proposed to design an expect beam. The method designed the modal domain robust modal coefficient using the model decomposition method to generate different beam under the different mode circumstances, using second-order cone optimization algorithm gain more reasonable compromise than the other methods in the broadband beam performance, The platform of choice and operation of space were provided according to the demand for …
Arm-Based Real-Time Video Stabilization Enhancement Algorithm,
2020
School of Computer Science, Beijing Institute of Technology, Beijing 100081, China;
Arm-Based Real-Time Video Stabilization Enhancement Algorithm, Xiaoquan Chen, Zhang Lei, Huang Hua
Journal of System Simulation
Abstract: Considering the performance characteristic of ARM processor, an ARM-based real-time video stabilization enhancement algorithm was proposed that identified shakiness of video and implements motion smoothing in the space of geometric transformations. The algorithm identified the shakiness of video with the amplitudes’ change of translation and rotation. Then the optimal path could be obtained by linear interpolation on translational vector and rotational angle. Stable frames were generated by implementing motion compensation of translation and rotation transformations respectively. Because the algorithm used linear interpolation in the space of rigid transformations, it was much faster than the previous algorithms. Moreover, it …
Can Bus Simulation System Based On Opnet,
2020
College of Engineering, Bohai University, Jinzhou 121013, China;
Can Bus Simulation System Based On Opnet, Yantao Liu, Xu Jing, Guiyang Xia, Qin Na
Journal of System Simulation
Abstract: CAN (Controller Area Network) is a typical kind of serial communication protocol. To solve the problem of bus contention, CAN adopts the mechanism of non-destructive bitwise arbitration. In order to realize simulation study on this mechanism, simulation models of Medium Access Control (MAC), process models, node models and network model of CAN were built. End-to-End delay of the simulation network was obtained by simulating these models under the condition of whether there existed a bus contention. The correctness of these models was proved by extensive simulation experiments and rigorous analyses. The models can be used in simulation study …
Online Fragment Culling For Efficient Rendering Of Multi-Fragment Effects,
2020
1. Institute of Computing Technology, Chinese Academy of Sciences, Beijing 100190, China;;
2. Beijing Key Laboratory of Mobile Computing and Pervasive Device, Beijing 100190;;
3. University of Chinese Academy of Sciences, Beijing 100049, China;
Online Fragment Culling For Efficient Rendering Of Multi-Fragment Effects, Zhou Guo, Dengming Zhu, Zhaoqi Wang, Wei Yi
Journal of System Simulation
Abstract: Multi-fragment effects such as real-time transparency are rendered by visiting the per-pixel fragments in depth order. The k-buffer algorithm rendered the scene in a single pass to obtain several layers of fragments. The read-modify-write hazard while updating the buffer should be avoided thus the performance was likely to be hit hard. The temporal and spatial coherence among frames were exploited to cull the input fragments in an online manner. A fragment cache based on a semi-heap was proposed. The worst case scenario of the time complexity was analyzed. The reverse reprojection was employed to construct the culling interface …
Modeling And Simulation Of Bldcm Fuzzy Control System With Real-Time Modification Function,
2020
School of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082, China;
Modeling And Simulation Of Bldcm Fuzzy Control System With Real-Time Modification Function, Yuanwang Deng, Zeng Jun
Journal of System Simulation
Abstract: Based on the analysis of the mathematical model of brushless direct current motor (BLDCM), a novel method for modeling of BLDCM was proposed. In MATLAB, the model of BLDCM was established by C MEX S-function, and the simulation results showed that the proposed method can enhance the simulation efficiency. Based on the modeling and simulation of BLDCM, a modification function was introduced and a self-turning fuzzy controller was built. According to the error and error rate of speed, the proposed modification function performed real-time regulation of fuzzy rules. There were six regulation parameters …
Research Of Approximation Algorithm Of Vertex Cover,
2020
School of information science, Guangdong University of Finance and Economics, Guangzhou 510320, China;
Research Of Approximation Algorithm Of Vertex Cover, Wenyu Gao, Li Hua
Journal of System Simulation
Abstract: Vertex cover is one of the most important NP complete problems, and it is also one of the most studied problems in parameterized algorithm design in recent years. According to some deficiencies of existing vertex cover approximation algorithms, a novel NT theorem based 2-approximation algorithm was proposed based on advances in parameterized algorithm. The new algorithm first used kernelization technology to reduce the origin graph, then used greedy strategy to guide the vertex selection in the remaining graph, kernelization provided effective guarantee for the approximation algorithm. In order to test the performance of the new algorithm, simulations on different …
Analysis Of Risks Transmission And Control In Subway Construction,
2020
School of Civil and Architecture Engineering, Xi’an Technological University, Xi’an 710021, China;
Analysis Of Risks Transmission And Control In Subway Construction, Qingjun Guo, Hongyu Yan, Bosen Li
Journal of System Simulation
Abstract: The process of the transmission and control of hidden dangers in subway construction is very similar to that of infectious diseases. Based on an engineering example, the characteristics of the complex system in the subway construction site are analyzed, and a simulation method using the propagation dynamics model to describe the interaction and propagation of various elements is proposed. Hazard source and hidden danger data of a section of Qingdao metro line 4 from march to August 2017 are selected as the original state, using by MATLAB R2014a simulation calculation, the densities of different elements are gotten, the process …
Hardware-In-The-Loop Simulation System For Underwater Vehicle Based On Unity3d,
2020
Northeast Petroleum University, Daqing 163318, China;
Hardware-In-The-Loop Simulation System For Underwater Vehicle Based On Unity3d, Fushen Ren, Yaqi Sun, Hu Qing, Zhaoliang Li, Pengyu Sun, Yukun Fan
Journal of System Simulation
Abstract: In order to provide a simulation and test platform for the performance test, control algorithm analysis and operation training of underwater robot, a hardware-in-the-loop simulation system based on Unity3D is developed, which consists of a ground control terminal, a robot body and a three-dimensional simulation system. The system uses the same ground control terminal as the unified command input source of the three-dimensional simulation system and robot control system, and realizes the synchronization of the virtual object and robot body, real-time monitoring and parameters adjustment to the system. The position of the robot is collected by multiocular vision technology, …
Robust Heading Control Of An Unmanned Surface Vehicle Based On Lpv Model,
2020
1. Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China;;2. Shenyang Institute of Automation (Guangzhou), Chinese Academy of Sciences, Guangzhou 511458, China;
Robust Heading Control Of An Unmanned Surface Vehicle Based On Lpv Model, Junfeng Xiong, Yuqing He, Jianda Han, Mingzhe Yuan
Journal of System Simulation
Abstract: Aiming at the strong nonlinearities of hydrodynamics, and the influences of wind, wave and current on USVs (Unmanned Surface Vehicles), an H∞ robust yaw keeping controller based on LPV (Linear Parameter Varying) model is proposed. The LPV model uses the Froude number as the varying parameter, reflects the USV’s nonlinear hydrodynamics along with the Froude number, and simplifies the parameters identification and controller design. By using the Froude number as the scheduled parameter, an H∞ robust yaw keeping controller is designed on the basis of bounded real lemmas to attenuate the disturbances. Simulations on a 3-DOF underactuated …
Numerical Simulation Study Of Impact Of Stagger Angle And Radius Ratio On Performance Of Combined Type Vawt,
2020
1. Guangzhou HKUST Fok Ying Tung Research Institute, Guangzhou 511458, China;;2. Hong Kong University of Science and Technology,Hong Kong, China;;
Numerical Simulation Study Of Impact Of Stagger Angle And Radius Ratio On Performance Of Combined Type Vawt, Xiucong Fu, Xiaoting Liang, Baoxing Ou, Chili Wu, Ruheng Zhao, Yuepeng Li, Kaihong Pi, Xiao Shuai
Journal of System Simulation
Abstract: Darrieus-Savonius combined rotor could effectively improve the performance of sole type vertical axis wind turbine. In order to investigate the impacts of radius ratios and stagger angles on the combined rotor, and their best combination, aerodynamic simulations of different radius ratios and stagger angles were studied. The numerical simulation is based on 2D unsteady incompressible air model and realizable k-ε turbulence model. The result indicates that the radius ratio represents the occupied swept area of Savonius rotor, the larger radius ratio, the higher proportion of the positive momentum outputs (M≥0) in a rotation period. In addition, …
Research On Characteristics Of City Agglomeration Compound Traffic Network,
2020
School of Transportation, Inner Mongolia University, Hohhot 010070, China;
Research On Characteristics Of City Agglomeration Compound Traffic Network, Chengbing Li, Wei Lei, Yucheng Hao
Journal of System Simulation
Abstract: In order to serve the economic development of city agglomeration, revealing the characteristics of city agglomeration compound traffic network was focused on. The model of city agglomeration compound traffic network was built using the site mapping method based on analysis of the structure of city agglomeration compound traffic network. The characteristics and specific calculation method based on complex network theory were put forward. Compound traffic network of road and rail traffic network was generated through an empirical study of Hu-Bao-E city group, and node degree, node degree distribution, average path length, clustering coefficient of this network be computed …
Study On Defect Shape Influence On Strength Of Oilfield Water Injection Tubing,
2020
1. State Key Laboratory of Oil and Gas Geology and Exploration, Southwest Petroleum University, Chengdu 610500, China;;
Study On Defect Shape Influence On Strength Of Oilfield Water Injection Tubing, Qingyou Liu, Xu Tao
Journal of System Simulation
Abstract: Oilfield water injection tubing can form various defects which affect the strength of tubing body during the installation and other operations. For studying the influence of different shape defects to stress field of the oilfield water injection tubing, three kinds of defects which are hemispherical, half cylindrical and conical were chosen on the body surface of oilfield water injection tubing, to analyze the stress field distribution of tube body in the three kinds of load conditions that are the single internal pressure, the tensile load and internal pressure-tensile complex load. The simulation result show that: there are high and …
Multi-Objective Topology Mapping Method For Network Emulation,
2020
School of Internet of Things Engineering, Jiangnan University, Wuxi 214122, China;
Multi-Objective Topology Mapping Method For Network Emulation, Xiaofeng Wang, Chen Yang, Guangjie Zhang, Jianyu Chen
Journal of System Simulation
Abstract: Network emulation is an important support for the verification of new network technology, and effective mapping is the key to the emulation network topology. Considering the multiple resource requirements, a multi-objective topology mapping method (MOTM) for network emulation topology is proposed to realize the effective physical resources utilization. The method analyzes the resource requirements of nodes and links, assigns corresponding weights, converts the mapping problem into the graph partitioning problem, divides the graph by multi-level graph partitioning method, and forms a mapping strategy through remote throughput threshold optimization adjustment. The automatic deployment is implemented based on the …
3d Human Pose Tracking Approach Based On Double Kinect Sensors,
2020
1. Key Laboratory of Intelligent Information Processing, Institute of Computing Technology, Chinese Academy of Sciences, Beijing 100190, China;;2. University of Chinese Academy of Sciences, Beijing 100049, China;;
3d Human Pose Tracking Approach Based On Double Kinect Sensors, Li Qi, Xiangdong Wang, Li Hua
Journal of System Simulation
Abstract: 3D human pose estimation and tracking is a popular problem of machine vision. In order to improve the stability of human pose tracking, the human body motion posture is represented by the human joint DOF (Degree of Freedom) vector, the human pose is tracked by the unscented Kalman filter method, and a human pose tracking system based on double Kinect sensors is built. Compared with the traditional human motion capture system, the system can accurately and stably track 3D human pose under simple movements, reflect the special nature of the motion process under complex movements, and can be used …
Image Skeleton Extraction Method Based On Flood-Fill,
2020
School of Information Science and Technology, North China University of Technology, Beijing 100144, China;
Image Skeleton Extraction Method Based On Flood-Fill, Xingquan Cai, Zhe Yang, Runbo Cai, Yakun Ge, Yang Bo
Journal of System Simulation
Abstract: Aiming at the burr phenomenon and skeleton redundancy in current image skeleton extraction, a method based on flood-fill is proposed. The target image is pre-processed to obtain a threshold binary image and the foreground and background are segmented. A mask image and axis map are constructed to provide data sources and judgment basis for the subsequent calculation process. The diffusing water process is simulated by traversing the horizontal grayscale histogram. The foreground contour of the mask image is shrinked. According to the change of the connected components of the neighborhood, a skeleton feature point is determined . When …
