Precise Integration Method Application In Dynamic Simulation Of Wrap,
2020
Navigation College, Dalian Maritime University, Dalian 116026, China;
Precise Integration Method Application In Dynamic Simulation Of Wrap, Gao Shuai, Yin Yong, Xiaofeng Sun, Helong Shen
Journal of System Simulation
Abstract: A three-dimensional hydrodynamics mathematical model was proposed to describe the behavior of warp in order to realize the real-time visualization of trawler warp. The model of warp was established according to lumped mass method, which discreted warp into a series of nodes in space, while ignoring the twist, shake, etc,. By the index matrix of precise integration method solving the nonlinear dynamic equations of the warp,the information of position and velocity could be obtained.Thus the dynamic visualization of warp was realized. The iterative algorithm has very high accuracy and efficiency, and a wide rage of application. Comparing the …
Algorithm For Modeling Of Large-Scale Realistic Chinese Rose Based On Morphological Characteristics,
2020
1. School of Information Science and Technology, Beijing Forestry University, Beijing 100083, China;;2. The State Key Laboratory of Computer Science, Institute of Software, Chinese Academy of Sciences, Beijing 100190, China;
Algorithm For Modeling Of Large-Scale Realistic Chinese Rose Based On Morphological Characteristics, Yang Meng, Wanghui Guo, Xiaoyu He, Lin Lin, Yang Gang
Journal of System Simulation
Abstract: An algorithm of modeling individual plant and simulating large-scale garden scene of Chinese rose seasons was proposed based on morphological characteristics of plants. Real morphological data were accurately captured for the main organs of individual plant; These data should be deeply analyzed to gain the morphological properties, such as golden section; Topological relationships were established among the main stem and different high-order branches, branches and leaves. Meanwhile the main organs such as stem, leaves, flowers and thorns were simulated to complete the whole plant; The large-scale garden scene of Chinese rose were simulated based on the algorithm of Poisson …
Color Transfer Based On K-Means Clustering Algorithm And Region Matching,
2020
1. College of Information Science and Technology, Beijing Normal University, Beijing 100875, China;;2. Engineering Research Center of Virtual Reality and Applications, Ministry of Education, Beijing 100875, China;;
Color Transfer Based On K-Means Clustering Algorithm And Region Matching, Ziying Zhang, Mingquan Zhou, Wuyang Shui, Zhongke Wu, Zheng Xia
Journal of System Simulation
Abstract: For color transfer between colorful images, we used K-means clustering to classify image pixels and we also proposed nearest region matching algorithm. This algorithm can avoid the problem that multiple regions matched to the same region, and it can get the best match results between the two images. Translate the color space from RGB to for the two images. Divide color image and luminance mapped shape image using K-means models into the same number of classes. Determine the relationship between regions of the two images using Euclidean distance and the nearest region matching algorithm. Complete color transfer from color …
Interactive Point Based Method For Soft Tissue Deformation In Surgical Simulation,
2020
1. College of Information Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China;;3. Shenzhen Institutes of Advanced Technology, Shenzhen 518055, China;;
Interactive Point Based Method For Soft Tissue Deformation In Surgical Simulation, Junliang Shan, Weixin Si, Xiaomeng Li, Wang Qiong, Yanjun Peng, Zhiyong Yuan, Pingan Wang
Journal of System Simulation
Abstract: Although recent years have witnessed great improvement in the research of biomechanical simulation with user interactions for surgical simulation, it still suffers from many challenges such as computational model of soft tissue undergoing large deformation, collision detection, volume conservation, etc. A simple and efficient framework was proposed to meet these challenges. To well reproduce the mechanical response of organs, point based method was used to model the elastic solids undergoing large deformations. In addition, position based dynamics was adopted to model the objects collision, friction and volume conservation, which considerably improved the real-time performance and stability of complex interactions …
Algorithm For Sea Ice Model Scene Management Based On Spatial Index,
2020
Navigation College, Dalian Maritime University, Dalian 116026, China;
Algorithm For Sea Ice Model Scene Management Based On Spatial Index, Yuhao Sun, Yin Yong, Yicheng Jin, Gao Shuai
Journal of System Simulation
Abstract: In the process of modeling for scene visualization in marine simulator, ice region scene needs plenty of sea ice. Because of the numerous sea ice models, it may cause huge waste of time and space then make the whole simulation system in a poor real-time visualization situation, if there is no scientific or effective method. Applying quad-tree spatial index algorithm to sea ice dynamic modeling and management in ice region scene system of marine simulator, it could reduce consumption of time and space resources, improve the whole system fluency, and optimize the visualization of sea ice scene. And it …
Salient Region Detection Based On Object-Biased Gaussian Refinement And Global Contrast,
2020
1. School of Computer and Information Engineering, Beijing Technology and Business University, Beijing 100048, China;;2. Beijing Key Laboratory of Big Data Technology for Food Safety, Beijing Technology and Business University, Beijing 100048, China;
Salient Region Detection Based On Object-Biased Gaussian Refinement And Global Contrast, Cai Qiang, Ziyu Xue, Dianhui Mao, Haisheng Li
Journal of System Simulation
Abstract: In view of the disadvantages such as the incomplete detection in image boundary which is caused by the global contrast significance detection algorithm, a visual saliency detection algorithm was proposed named salient region detection based on object-biased Gaussian refinement and global contrast. After segmentation based on graph, the global contrast was used to calculate the saliency value of each segmentation blocks. According to the location of the salient object, the center of the Gaussian model was adjusted. Both saliency detection value and Gaussian model combined effect of the final saliency values. The method paid attention to the …
Evaluation Method Of Dimensional Visual Effects Based On Improved Grey Clustering,
2020
College of Computer Science and Technology of Henan Polytechnic University, Jiaozuo 454000, China;
Evaluation Method Of Dimensional Visual Effects Based On Improved Grey Clustering, Yanyang Zeng, Panpan Jia
Journal of System Simulation
Abstract: Currently, the assessment of the three-dimensional visual effects is concentrated on the assessment methods, while ignoring the role of the index system. Therefore, an index system about fidelity evaluation of the visual simulation was proposed, including the various steps of the construction of the entire visual simulation system. The steps are from three-dimensional modeling to the output of simulation screen. On this basis, the evaluation method of dimensional visual effects was proposed based on improved grey clustering, and it is the combination of subjective and objective. The fuzzy evaluation was used to improve the method of determining the weights, …
Research On 3d Airway Trees Segmentation And Centerline Extraction Algorithm,
2020
College of Computer Science and Technology. Heilongjiang Institute of Technology, Harbin 150050, China;
Research On 3d Airway Trees Segmentation And Centerline Extraction Algorithm, Yanbo Li, Yu Xiang
Journal of System Simulation
Abstract: Centerline extraction plays an important role in virtual bronchology. Organ segmentation and centerline extraction with correct topology structure is very difficult, especially for multiple branching structure organs. Therefore, a 3D airway tree segmentation and centerline extraction algorithm was proposed. A new region growing method was proposed to extract the main branch and sub-branch. The initial center was extracted based on the relationship of adjacent section. The center was corrected by computing the value of the determinant of Jacobian matrix, and the path with all the points was generated by Dijkstra's shortest path algorithm. The experimental results show that …
Research On Simulation System Of 3d Orchid Flower Blossoming Process,
2020
1. Zhangzhou City College, Zhangzhou 363000, China;;
Research On Simulation System Of 3d Orchid Flower Blossoming Process, Yanhuang Xu, Junfeng Yao, Baorong Yang, Qidi Wang, Yuzhen Sun
Journal of System Simulation
Abstract: As the national flower of China, orchid has various kinds of types and shapes, and its bloom process has never been simulated before. A model library of orchid organs was established and a transformation algorithm with random-valued parameters was proposed based on the model library of orchid organs by studying botanical knowledge of orchids and taking orchids with different morphological characteristics as research subjects for virtual modeling. Different segmental transformations were respectively performed on each organ of orchids to simulate growth of the organs according to the growth law of orchids. Different examples for simulating different type of orchids …
Motion Tracking System By Direct Fusion Of Rgb-D Camera And Micro-Imu Sensors,
2020
Tianjin Key Laboratory of Intelligent Robotics, Institute of Robotics and Automatic Information System, Nankai University, Tianjin 300071, China;
Motion Tracking System By Direct Fusion Of Rgb-D Camera And Micro-Imu Sensors, Zhang Yang, Xu Lin, Guangyi Sun
Journal of System Simulation
Abstract: Recently, low cost full Body Motion Tracking attracted tremendous attentions in the fields of Computer Vision and Automation. Single depth camera-and inertial-based motion tracking systems rapidly have become two primary options for small-business and individual consuming markets, due to their relatively inexpensive price and comparable performance. However, both depth camera-and inertial-based motion tracking systems have inherent disadvantages which cannot be eliminated theoretically and experimentally. For example, depth camera tracking mostly failed in the presence of occlusion while inertial sensor tracking usually suffered from drift errors. Therefore, a novel multiple-sensor fusion approach which seamlessly combined the data measured from a …
Iekf-Swcs Method For Pedestrian Self-Navigation And Location,
2020
Beijing Information Science and Technology University Beijing Key Laboratory of High Dynamic Navigation Technology, Beijing 100101, China;
Iekf-Swcs Method For Pedestrian Self-Navigation And Location, Zhe Gao, Li Qing, Li Chao, Liu Ning
Journal of System Simulation
Abstract: In the process of using wearable inertial measurement unit to realize pedestrian navigation, accumulated drift errors are increasing with pedestrian moving, which has serious effects on the navigation accuracy. To solve this problem, a pedestrian self-navigation and location method was proposed based on improved extended kalman filter (IEKF). An 18 dimensional filter model fused with human motion characteristics was built. Meanwhile, a step wise closed loop smoothing (SWCS) algorithm was designed in IEKF, which could eliminate the sharp correction at some sample points and improve the smoothness of the trajectory. A self-developed IMU sensor was used to make …
Efficiency Simulation Of System Of Uav Patrol System Base On Stk,
2020
Beijing Institute of Aerospace Systems Engineering, Beijing 100076, China;
Efficiency Simulation Of System Of Uav Patrol System Base On Stk, Yang Yong, Xijun Yan, Zhang Heng
Journal of System Simulation
Abstract: In order to analyze problems such as coverage percent of mission area and reliable communication between unmanned aerial vehicle (UAV) and ground control station, a method for simulation and validation based on STK was proposed. The condition should be satisfied in theory to achieve seamless coverage of the mission area by using UAV reconnaissance and communication system was analyzed. A method for down link calculation of UAV and the ground control station was proposed. STK simulation was used for validating the correctness of theoretical analysis. It shows that the simulation results can provide rational support for UAV reconnaissance and …
Task Allocation Modeling For Agent-Oriented Uuv Collaborative System,
2020
1. Marine College, Northwestern Polytechnical University, Xi'an 710072, China;;2. National Key Laboratory of Underwater Information Process and Control, Xi'an 710072, China;
Task Allocation Modeling For Agent-Oriented Uuv Collaborative System, Hongtao Liang, Fengju Kang
Journal of System Simulation
Abstract: Task allocation modeling plays an important role in UUV collaborative system. In order to solve task allocation problem for the collaborative capability and efficiency, the Extended Contract Net Protocol (ECNP) task allocation approach was creatively proposed, which mainly focused on narrow the scope of communication and improving the negotiation efficiency. In this approach, Regional Trust Degree was introduced to narrow the scope in Announcement stage; and the capacity constraints (Energy-state, Health-State, and Detecting-window) were employed to decide whether to participate in bidding stage; also mixed-weighting evaluation strategy based on Game theory was proposed to evaluate the biding in Awarding …
Algorithm Of Double Level Visual Modeling Based On Data Of Pesticide Residues,
2020
1. Beijing Technology and Business University, Beijing 100048, China;;3. Beijing Key Laboratory of Big Data Technology for Food Safety, Beijing Technology and Business University, Beijing 100048, China;
Algorithm Of Double Level Visual Modeling Based On Data Of Pesticide Residues, Ruijun Liu, Chen Yi, Xu Yang
Journal of System Simulation
Abstract: Based on the study of pesticide residues detection result data, which has the characteristics of geographical level and the level of classification of fruits and vegetables, in node links and radial loop algorithm visualization model, the double level structure, radiation chain graph CircleLink, was designed for analysis of pesticide residues data in visual modeling algorithm. The visual modeling algorithm was applied to the actual pesticide residues detection results data for the simulation analysis and conclusions. Analysis of the characteristics of pesticide collection, distribution of agricultural products and supermarket pesticide residues of pesticide residues was applied.
Application Of Mutil-Level Fuzzy Algorithm In Ir Countermeasure Performance Integrated Evaluation,
2020
Shanghai Institute of Electro-Mechanical Engineering, Shanghai 201109, China;
Application Of Mutil-Level Fuzzy Algorithm In Ir Countermeasure Performance Integrated Evaluation, Li Fan, Geng Xu, Xiaojie Dong, Zehua Hong
Journal of System Simulation
Abstract: In order to improve the evaluation precision of countermeasure of IR guidance systems, a new method was proposed. The principle of multi-level fuzzy comprehension evaluation was analyzed, and a four level fuzzy comprehension evaluation was established. The result of the example under different simulation conditions shows its effectiveness.
Research And Simulation Of Cross Flow Heat Exchanger,
2020
Shanghai Aviation Design Research Institute, Commercial Aircraft Corporation of China, Ltd., Shanghai 201210, China;
Research And Simulation Of Cross Flow Heat Exchanger, Chengyun Wu, Guangwen Wang, Geping Li, Xudong Xin
Journal of System Simulation
Abstract: Based on cell concept, the lumped parameter method was applied and the parameters in single heat exchanger cell were deduced. Thereafter 1, 4, 9,100 cells heat exchanger simulation model was set up and the simulation error and its influencing factors were analyzed. To simplify the algorithm and increase the calculation speed, as well as improve the accuracy of cross flow heat exchanger, the simplified heat exchanger model was proposed and reviewed. The research results show that the calculation of simplified heat exchanger is precise and the algorithm is simple. The model could be widely applied in cross flow heat …
Adaptive Traffic Signal Timing Model On Polling System And Simulation Study,
2020
1. School of Information Science and Technology, Yunnan University, Kunming 650091, China;;
Adaptive Traffic Signal Timing Model On Polling System And Simulation Study, Guan Zheng, Yueqiang Wang, Wenhua Qian
Journal of System Simulation
Abstract: A road traffic signal timing system could be corresponds to a polling model. For a queue with a large number of vehicles, under the exhaustive service, the corresponding traffic light will state on green for a long time to empty the queue, vise engender frequent switchover. Motivated by this problem, the timing strategy with minimum and maximum green times for each phase was proposed, which was modeled as a time limited polling system, and then the average queue length at the beginning of green period was analyzed to calculate the green times by the Markova chain and Generation Function …
Gait Recognition Based-On Relative Motion Features And Kinect,
2020
National Laboratory for Parallel and Distributed Processing, National University of Defense Technology, Changsha 410073, China;
Gait Recognition Based-On Relative Motion Features And Kinect, Yang Ke, Dou Yong, Lv Shaohe
Journal of System Simulation
Abstract: Gait recognition Kinect is a very important biometric technology. Gait feature can be divided into two categories: static and dynamic. Some work found that although the essential characteristics of gait are motion, but the motion feature's recognition capability is limited. However, is the distinguishing ability of the motion itself limited, or existing features doesn't adequately capture the characteristics of motion? Relative distance-based motion features were proposed, and distances between the particular skeleton points and their changes were used to characterize the gait. The relative motion features were extracted without calculating the gait cycle, and with robustness. Experimental results …
Facial Expression Recognition With Independent Subspace Analysis Based Feature Learning,
2020
1. Center for Digital Media Computing, Software School, Xiamen University, Xiamen 361005, China;;2. School of Information Science and Engineering, Xiamen University, Xiamen 361005, China;
Facial Expression Recognition With Independent Subspace Analysis Based Feature Learning, Yongjie Zhan, Long Fei, Yikun Bu
Journal of System Simulation
Abstract: Hand-designed features (such as Gabor, LBP) has been widely employed in facial expression recognition. In the real-world applications of facial expression recognition, it is very difficult to achieve perfect face alignment because of the impact of complex background and the limitations of face alignment approaches. Independent Subspace Analysis (ISA) is an unsupervised feature learning method, which can be used to learn phase-invariant visual features from images. The problem of facial expression recognition based on ISA in the situation of not precise face alignment was investigated. Through analyzing the facial expression recognition performances with different subspace size, it was turned …
3d Printing Orientation Optimization Based On Non-Dominated Sorting Genetic Algorithm,
2020
College of Mechanical & Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;
3d Printing Orientation Optimization Based On Non-Dominated Sorting Genetic Algorithm, Dai Ning, Lisong Ou, Renkai Huang, Liu Hao
Journal of System Simulation
Abstract: Part orientation is one of the key technologies in 3D Printing,which has important influence on the surface precision, machining time and machining cost of the part. This problem is a research hot point of how to balance the surface precision and machining time. The improved Non-dominated Sorting Genetic algorithm was proposed to solve the problem of part orientation optimization. The mathematical model of part surface accuracy and machining time were constructed. The chromosome model of part orientation and the adaptive crowding distance were established. The genetic operators of select, crossover and mutation were used to get a set of …
