Simulation On Anti-Swing Of Container Cranes Based On Iterative Learning Control,
2019
Shanghai Maritime University, Shanghai 201306, China;
Simulation On Anti-Swing Of Container Cranes Based On Iterative Learning Control, Liang Gang, Yiming Zhao, Hengming Qin
Journal of System Simulation
Abstract: To achieve the purpose of reducing or even eliminating the fixed stop container’s swinging after container cranes positioning, thereby improving the efficiency of quayside container cranes, the PD-type iterative learning control is selected to perform simulation analysis. This selection is based on the analysis of dynamic properties of quayside container lifting systems and the qualities of the repetitive nature of the swing phase of the container. A fixed initial state is assumed, and the PD parameters are determined after several debugging tasks. Based on Simulink blocks, the entire iterative learning controller model is established to design lifting systems of …
Effect Of Rail Fracture On Train Shunt-Circuit Current Envelope,
2019
School of Automation and Electrical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China;
Effect Of Rail Fracture On Train Shunt-Circuit Current Envelope, Youpeng Zhang, Zhao Jian, Bin Zhao
Journal of System Simulation
Abstract: To analyze change rules of train shunt-circuit current amplitude envelope under the track circuit crack state, a distributed parameter equivalent mathematic model of ZPW-2000A track circuit crack state was constructed based on the transmission theory; and the effect of ballast resistances, the crack points and the crack equivalent impedances on train shunt-circuit currents amplitude envelope were studied using MATLAB. Experiment results show that the ballast resistance, the crack point and the crack equivalent impedance have great influence on train shunt-circuit current amplitude envelope before crack point; and the train shunt-circuit current amplitude envelope occurs discontinuity at the crack …
Review Of 3d Facial Expression Acquisition And Modeling Technology,
2019
1. State Key Laboratory of Virtual Reality Technology and Systems, Beihang University, Beijing 100191, China;;2. School of New Media Art and Design, Beihang University, Beijing 100191, China;
Review Of 3d Facial Expression Acquisition And Modeling Technology, Wang Shan, Xukun Shen, Qinping Zhao
Journal of System Simulation
Abstract: Face is an important biological feature of human. High-fidelity 3D face construction is widely applied and has attracted the attention of researchers for a long time. Now the mature 3D model acquisition still depends on the expensive hardware and controlled lighting environment in the lab. However, academic focus has gradually transformed to researches based on daily living environment and low cost equipment. According to the source of input data, the existing works are divided into two categories: works under controlled environment and uncontrolled environment. Methods are summarized and classified based on the categories. Existing problems and future research directions …
Interactive Modelling On Smooth Weighted Distance Surface In Hmd Vr Environment,
2019
1. School of Communication and Information, Shanghai University, Shanghai 200444, China;;2. Institute of Smart City, Shanghai University, Shanghai 200444, China;
Interactive Modelling On Smooth Weighted Distance Surface In Hmd Vr Environment, Xiaoqiang Zhu, Hongyi Pan, Xu Hao, Song Lei, Mengyao Zhu, Xiangyang Wang
Journal of System Simulation
Abstract: An interactive modelling scheme in immersive VR environment is proposed, in which the point, line and polygon skeletons are inputted by handles of HMD (Head-Mounted Device). Weighted distance field is calculated in parallel with CUDA on GPU according to the varying radii, and then the iso-surface is extracted using paralleled marching cubes. In order to avoid the non-smoothness at interactions between different distance surface components, weighted filtering kernels are utilized to smooth the skeleton-based distance field with various radii in our modelling system, so that smooth blending model is produced from multi-component distance fields. In our system, …
Variable Scale Point Cloud Registration Algorithm,
2019
1. China Three Gorges University Hubei Key Laboratory of Intelligent Vision Based Monitoring for Hydroelectric Engineering, Yichang 443002, China;;2. Nanjing Normal University Jiangsu Key Laboratory of 3D Printing Equipment and Manufacturing, Nanjing 210042, China;
Variable Scale Point Cloud Registration Algorithm, Shuifa Sun, Zhun Li, Kun Xia, Yunfei Shi, Jiquan Yang, Fangmin Dong
Journal of System Simulation
Abstract: To address the low registration accuracy issue caused by scale mismatch of two point clouds, a multi-scale point cloud registration algorithm is proposed based on the distance ratio invariance of the geometric center of gravity and centroid. The point cloud is firstly filtered. Then, the scale ratio calculation model of the point cloud data is established by computing the point cloud’s gravity center and centroid. Finally, according to the relationship between the registration error and the scale true value, the scale factor is refined step by step with ICP algorithm. For the noise and the inconsistent point in the …
Modeling Of Wheat Ears Growth Based On Bezier Surface,
2019
1. School of Software, Zhengzhou University, Zhengzhou 450000, China;;
Modeling Of Wheat Ears Growth Based On Bezier Surface, Junxiao Xue, Chenyang Sun, Mingliang Xu, Yin Hui, Haiyu Yu
Journal of System Simulation
Abstract: Simulation model of wheat growth has important theoretical significance and application value for wheat growth regulation and management. Study the growth of wheat ears from heading to maturity. We propose an unified modeling method for the grain, lemma and palea of wheat ears based on Bezier surface. Meanwhile, all the models are re-polygonized so that it can be easier to detect the collision. The method can simulate the growth of wheat ear with relatively high modeling efficiency. Experiment results show that the proposed method has very good modeling effect and the modeling of wheat ear at different growth stages …
Modeling On Information Exchange Behavior In Emergency Evacuation,
2019
1. Lab for Advanced Computing Research, Beijing 100190, China;;
Modeling On Information Exchange Behavior In Emergency Evacuation, Tianlu Mao, Xiangjun He, Yingfan Huang, Jiang Hao
Journal of System Simulation
Abstract: A method for modeling the information exchange behavior in an emergent crowd evacuation is proposed in this paper. It describes several aspects of information exchange in dynamic environments, includes contents, characteristics and ways of exchange. The influence model of know information on evacuation decision is built by cost evaluation and path planning. Combined with the existing crowd locomotion model, our method could model and simulate crowd evacuation in emergent situation. Realistic results with dynamic information exchanges and dynamic behavioral decision of crowds are given. The simulation results have a high coincidence degree with the real person experiments.
Integrated Generating Algorithm Of Centroidal Capacity Constrained Power Diagram,
2019
School of Computer and Information, Hefei University of Technology, Hefei 230009, China;
Integrated Generating Algorithm Of Centroidal Capacity Constrained Power Diagram, Liping Zheng, Lu Chang, Ruiwen Cai, Zhiqiang Gui
Journal of System Simulation
Abstract: Power diagram is the weighted Voronoi diagram. Centroidal capacity constrained power diagram (CCCPD) can be obtained by imposing capacity constraint and centroid constraint to the ordinary power diagram. To increase the convergence speed of existing CCCPD algorithms which optimize the weight and location of site interlacedly, an improved algorithm is proposed which optimizes all variables integratedly. Research results exhibit that the performance of the proposed algorithm is 40% higher than the traditional method.
Fusing Local And Global Features For Human Action Recognition,
2019
1. Department of Computer Science and Technology, Hefei University, Hefei 230601, China;;
Fusing Local And Global Features For Human Action Recognition, Tang Chao, Miaohui Zhang, Li Wei, Cao Feng, Xiaofeng Wang, Xiaohong Tong
Journal of System Simulation
Abstract: Recognizing human actions according to video features is an important research topic in a wide scope of applications. In this paper, we propose a robust human motion detection method that combines canny operator with the combination of local and global optic flow methods. Meanwhile, this paper presents a simple but efficient action recognition algorithm using fusion visual features. The mixed features fuse two action descriptors, namely centre distance-based space time interest point and curvature function-based Fourier descriptors. The frame-based human action classifier is developed using random forests algorithm. Experimental results show that the proposed method is accurate, efficient and …
Method Research On Collaborative Simulation Of Multi-Resolution Models,
2019
Unit 91336 of PLA, Qinhuangdao 066326, China;
Method Research On Collaborative Simulation Of Multi-Resolution Models, Gaofeng Zhang, Yujie Ji
Journal of System Simulation
Abstract: The collaborative simulation of multi-resolution models is an effective method to meet the requirement of “wide-area confrontation and local high imitation” in combat simulation. The generalized supporting platform for multi-resolution models collaborative simulation is constructed, and the collaborative simulation mechanism with mirror entity and control right dynamic migration as core technology is proposed, which can effectively solve the problem of interconnection and homomorphic mapping between multi-resolution models, as well as collaborative operation consistency issues. Under the support of this technique, the joint operation among different resolution models in a tactical deduction simulation system is stable, efficient and consistent. This …
Real-Time Video Webgis With Virtual-Reality Fusion,
2019
State Key Laboratory of Virtual Reality Technology and Systems, Beihang University, Beijing 100191, China;
Real-Time Video Webgis With Virtual-Reality Fusion, Yihao Yu, Tan Chong, Zhou Zhong, Wu Wei
Journal of System Simulation
Abstract: At present, smart cities have already become an important trend of urban governance in the information era. As an effective display method to the smart cities, augmented virtual environment technology has long been a common concern of researchers. However most of current augmented virtual environment technologies have the disadvantages of high hardware requirements, poor cross-platform capability, so it is difficult to promote to the common users. To solve this problem, in this paper, we put forward a fusion method based on WebGL, which combines the real-time monitor video stream with the 3D geographic scene, resulting in an augmented …
Research On Software Reliability Based On Test Effort And Imperfect Debugging,
2019
1. Xinzhou Teachers University, Xinzhou 034000, China;;
Research On Software Reliability Based On Test Effort And Imperfect Debugging, Aizhen Wang, Lü Xun
Journal of System Simulation
Abstract: To further improve the fitting performance of the software reliability models, imperfect debugging and test effort were considered in the progress of establishing the model of software reliability. The best performance test effort function was selected from some kinds of existing S-type functions through the method of simulation. The influences of test effort were considered in the software reliability model with imperfect debugging. The new model was established. Two groups of public data were used to verify the ability of the new model. The test results showed that the software reliability growth model considering test effort under imperfect …
Research On Augmented Reality Method Based On Unmarked Recognition,
2019
1. College of Computer and Software Engineering, Huaiyin Institute of Technology, Huaian 223001, China;;
Research On Augmented Reality Method Based On Unmarked Recognition, Li Qian, Shangbing Gao, Zhigeng Pan, Zhengwei Zhang, Chenghua Fang, Shengquan Wang
Journal of System Simulation
Abstract: As a kind of technology of superposing the virtual objects upon reality scene, AR (Augment Reality) expands the information quantity of the actual scene by virtual information. Aiming at the deficiency of previous AR application methods, the AR application method of unmarked recognition based on the optimized filtering was proposed in this paper. In this algorithm, filtering was used for image preprocessing to solve the poor matching efficiency problems of the past recognition algorithms, then three-dimensional model was established in two-dimensional images and the model was rendered in the two-dimensional plane. The experimental results show that, compared with …
Research On Inner And Outer Loop Control Of Active Suspension With Linear Motor,
2019
College of Mechanical Engineering, Xi’an University of Science and Technology, Xi'an 710054, China;
Research On Inner And Outer Loop Control Of Active Suspension With Linear Motor, Farong Kou, Fang Tao, Ren Quan, Chen Long
Journal of System Simulation
Abstract: In order to improve the dynamic performance of active suspension with linear motor, the control strategy of LQR control and quasi proportional resonance control was designed. A two-degree-of-freedom vehicle model with active suspension and a linear motor mathematical model were established, and the correctness of the linear motor model was verified by experiments. The influence of the inner loop controller parameters on the controller performance and the response characteristics of the linear motor were analyzed by Matlab/simulink, and the parameters of the inner and outer loop controller were determined. The PID control and quasi proportional resonant control were …
Virtual Vascular Stent Implantation Model Based On Fbs,
2019
1. College of Electronics and Information Engineering, Tongji University, Shanghai 201804, China;;
Virtual Vascular Stent Implantation Model Based On Fbs, Chenxi Huang, Yongtao Hao, Haowei Xing, Chen Fei
Journal of System Simulation
Abstract: Vascular stent intervention can expand the narrow coronary artery. Doctors analyze the patient's two-dimensional vascular images based on experience and select the stent. In this paper, vascular stent implantation is modeled and analyzed by Function-Behavior-Structure. The stent model is established by virtual reality modeling language and the stent implantation process is simulated. By combining FBS product design method with the virtual reality interaction technology, the virtual stent selection and implantation are adjusted until getting the best result. The prototype system can establish a personalized implantation model. The stent is selected accurately based on the specificity of patient's …
Operational Evaluation Of Traffic Guidance Systems Based On Multi-Agent-Based Simulation,
2019
Key Laboratory of Road and Traffic Engineering of Ministry of Education, Tongji University, Shanghai 201804, China;
Operational Evaluation Of Traffic Guidance Systems Based On Multi-Agent-Based Simulation, Keshuang Tang, Hengjia Zhang, Yixie Bowen
Journal of System Simulation
Abstract: To study the optimization effect of variable message sign-based traffic guidance system on the utilization efficiency of transportation resource, the multi-agent-based model is used to develop simulation and evaluation platform. The simulation experiments of three typical traffic guidance strategies are carried out. The effect of guidance is evaluated by the indexes as average driving time, average searching time for parking lot and parking failure rate. The result shows that the driving and parking guidance can help reduce the average driving time and the parking failure rate respectively. The influence of the traffic guidance system on the traffic operation status …
Study On Multi-Objective Collaborative Optimization Of Switched Reluctance Motor Based On Chaos Fruit Fly Optimization Algorithm,
2019
1. National-Local Joint Engineering Laboratory of Marine Mineral Resources Exploration Equipment and Safety Technology,Hunan University of Science and Technology, Xiangtan 411201, China;;
Study On Multi-Objective Collaborative Optimization Of Switched Reluctance Motor Based On Chaos Fruit Fly Optimization Algorithm, Xiaoping Zhang, Shenghua Rao, Zhang Zhu, Zhao Xuan
Journal of System Simulation
Abstract: Switched reluctance motor (SRM) is difficult to get the best solution due to its complicated process and high professional requirement. Therefore, a collaborative multi-objective optimization method based on chaotic fruit fly algorithm is proposed in the paper. The initial solution is obtained by traditional design method, and the performance is verified by finite element analysis (FEA). The extreme learning machine (ELM) is applied to obtain the non-parameter model of SRM based on the sample data from FEA. The chaotic fruit fly algorithm is proposed for design optimization. Simulation results demonstrate that better coefficient of torque ripple and efficiency can …
Optimization Of Material Release For Printed Circuit Board Template Based On Data Mining,
2019
1. School of Engineering, South China Agricultural University, Guangzhou 510642, China;;
Optimization Of Material Release For Printed Circuit Board Template Based On Data Mining, Shengping Lü, Qiangsheng Yue, Liu Tao
Journal of System Simulation
Abstract: Data mining were employed for the optimization of material release of PCB (Printed Circuit Board) template. PCB scrap ratio related parameters were specified and prediction model variables were chosen according to hypothesis test. Multiple linear regression (MLR), Chi-squared automatic interaction detector, artificial neural network and support vector machine approaches for the prediction of scrap ratio were employed. Evaluation indictors called as superfluous ratio, supplement release ratio and weighted sum of the two were presented; the material release simulation was conducted and then the four approaches were compared and MLR was taken as the preferred one. Adjust coefficient …
Study On The Effect Of Salt Fog On Polluted Insulator Under Switching Impulse,
2019
1. Hebei Provincial Key Laboratory of Power Transmission Equipment Security Defense, North China Electric Power University, Baoding 071003, China;;
Study On The Effect Of Salt Fog On Polluted Insulator Under Switching Impulse, Jianghai Geng, Zhong Zheng, Jiang Shuo, Fangcheng Lü, Yunpeng Liu, Songsong Zhou
Journal of System Simulation
Abstract: Water is mixed with soluble conductive material in haze so that the air has certain conductivity, resulting in extra mixed pollution components on the surface of the existing polluted insulator. In this paper, with the XP10-160 ceramic suspension insulator being used as the sample, the switching impulse test of the clean and polluted insulator is carried out by simulating high conductivity fog under the natural environment by salt fog method. This paper analysis the flashover characteristics of switching impulse under different salt density and water fog conductivity. The effect of high conductivity fog on the field intensity distribution of …
Research On Modeling And Simulation Of Ac/Dc Hybrid Power Distribution System,
2019
1. Institute of Electric Power, Shenyang Institute of Engineering, Shenyang 110136, China;;
Research On Modeling And Simulation Of Ac/Dc Hybrid Power Distribution System, Ye Peng, Li Shan, Sun Feng, Han Yue, Zhang Tao, Jiajue Li
Journal of System Simulation
Abstract: As DC loads and power supply are more and more applications in the grid, AC/DC power distribution system is the future development trend of the low voltage power grid. The modeling and simulation of AC/DC hybrid power distribution system are studied in this paper. Considering the power control, DC bus voltage control and DC power supply and load access, the hierarchical control model of voltage source converter for AC / DC hybrid distribution system and the control strategy of each layer are proposed, and on this basis, the mathematical model of each module is established. Based on PSCAD electromagnetic …
