Constructing Panoramic High Dynamic Range Image Based On Different Amounts Of Exposures,
2020
School of Computer Science and Technology, Changchun University of Science and Technology, Changchun 130022, China;
Constructing Panoramic High Dynamic Range Image Based On Different Amounts Of Exposures, Quan Wei, Wang Ying, Yanchun Wang, Xuyang Wang, Yunrui Zhu
Journal of System Simulation
Abstract: A method of constructing panoramic high dynamic range image was proposed. The classical method about different amounts of exposures was adopted by choosing sampling point carefully to generate better response curves for each child camera of the panoramic camera. Weighted method was applied to obtain panoramic response curve based on six response curves of each child camera. According to characteristics of spatial frequency, a template of panoramic image was selected, so as to complete the synthesis of high dynamic panoramic image. Experiments show that the response curve of panoramic camera can better reflect the characteristics, so the …
Three-Dimensional Virtual Simulation Of Overflow Dam,
2020
School of Mechanical and Automotive Engineering, Zhejiang University of Water Resources and Electric Power, Hangzhou 310018, China;
Three-Dimensional Virtual Simulation Of Overflow Dam, Guisheng Fang, Hongfa Wang
Journal of System Simulation
Abstract: Overflow dam is one of hydraulic structures widely used in the water conservancy projects. The surface structure of overflow dam and the open mode of sluice gate have huge influence to the flood flow. The Navier-Stokes equation was used as the turbulence control equation. The Smoothed Particle Hydrodynamics method was used to simulate the 3D flood flow. The shape of water flow and the distribution of pressure and the distribution of flow velocity were respectively analyzed in the case of different gate opening state. The experimental results show that the virtual simulation of overflow dam is the same as …
Title Medical Image Fusion Based On Multi-Scale Coefficient Decomposition Framework,
2020
School of Computer, Jiaying Univesity, Meizhou 514015, China;
Title Medical Image Fusion Based On Multi-Scale Coefficient Decomposition Framework, Kaifeng Wen, Bingjian Li
Journal of System Simulation
Abstract: The main purpose of medical image fusion is to obtain a high resolution image with as much details as possible for diagnosis. Magnetic resonance (MR) and computed tomography (CT) medical images has special sophisticated and complementary characteristics which are required for accurate diagnosis of disease. Based on this, a new medical fusion approach for MR and CT images based on multi-scale coefficient decomposition framework was proposed. The proposed approach used a combination of discrete wavelet and non-subsampled shearlet transforms for the initial multi-scale decompositions firstly. The decomposition multi-scale coefficients were fused twice using various local activity measures. The …
Discontinuous Hierarchical Data Visualization Method Based On Themeriver Model,
2020
Beijing Key Laboratory of Big Data Technology for Food Safety, School of Computer and Information Engineering, Beijing Technology and Business University, Beijing 100048, China;
Discontinuous Hierarchical Data Visualization Method Based On Themeriver Model, Yuangang Zhen, Chen Yi, Liu Ying, Ruijun Liu
Journal of System Simulation
Abstract: For traditional ThemeRiver model which has poor performance support to characteristics of discrete data, a kind of visualization method based on improved ThemeRiver model was put forward, which was applied to discontinuous data. All data was put into several time slots and was counted respectively, and new data was added in the time slot which lack data. Gaussian model was adopted to fit curve. After ordering layout, selecting themes' color and arranging the labels, a layout was proposed which has prediction function and can show the hierarchical characteristic. For the hierarchy, the same color family was used to …
Virtual Needle Insertion And Haptic Interaction,
2020
1. School of Computer Science, Nantong University, Nantong 226019, China;;
Virtual Needle Insertion And Haptic Interaction, Gao Zhan, Pan Fei, Jiehua Wang, Haiyan Pan, Zhengzheng Jiang
Journal of System Simulation
Abstract: Needle insertion or puncture has been widely practiced in clinical medicine. A VR based training system for needle insertion was implemented in this study. The mechanical model during insertion process was designed. Linear element model was applied to realize the simulation of soft tissue deformation. The friction and the stick-slip motion model between the puncture needle and the soft tissue were implemented to simulate the force interaction between needle and soft tissue. The haptic interaction of needle insertion was realized as well to enhance the user experience. The experiment results show that the simulation can reflect the process …
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 …
Pedestrian Dynamic Aggregation Simulation Model With Emotional Affection,
2020
1. School of Computer Science and Engineering, Chongqing University of Technology, Chongqing 400054, China;;
Pedestrian Dynamic Aggregation Simulation Model With Emotional Affection, Xiang Nan, Lingyun Zhu, Mingmin Zhang
Journal of System Simulation
Abstract: In order to improve the fidelity of dynamic aggregation process of virtual pedestrian, the relationship between gathering process and emotion contagion were simulated by integrating individual emotional interaction into crowd model. Individuals within the crowd firstly chose moving target and produced aggregation according to their expectation. The gathering process propagated the influences of target through the emotional interaction of individuals. The propagated influences affected individuals' expectation which made further efforts on crowd aggregation. Social force for simulating moving individuals and heat conduction theory were adopted by the model to simulate the emotional contagion of the crowd. Experimental results show …
Dark Color Image Segmentation Method Integrated Mrf & Retinex,
2020
School of Computer Information Engineering, Jiangxi Normal University, Nanchang 330022, China;
Dark Color Image Segmentation Method Integrated Mrf & Retinex, Yongchun Miao, Cheng Yan
Journal of System Simulation
Abstract: Given the interference from noise, poor quality and low identification of the night images, it is difficult to segment them by traditional color image segmentation method. Therefore, a novel dark color image segmentation method integrated MRF&Retinex was proposed. The -LPG-PCA filtering model was built to filter out noise of an image. The recovery function of the denoised image was constructed, before converting RGB color space to HSV color space, and the MRF & Retinex model was built for image enhancement and color correction operation. The denoised and enhanced color image was segmented by the MRF&FCM …
Research For Skeleton Tree Matching Of Microscopic Image Of Diatom Cells,
2020
College of Mathematic and Information Science, Shandong Institute of Business and Technology, Yantai 264005, China;
Research For Skeleton Tree Matching Of Microscopic Image Of Diatom Cells, Xiaoyan Qiao
Journal of System Simulation
Abstract: The image analysis technology based on morphological differences has become an important method of algae recognition in recent years. A skeleton similarity matching method was proposed to recognize microscopic images of diatom cells. The gray surface vector model of image was established to make segmentation by keeping obscure seta; The skeleton was used to represent the Chaetoceros, and it was decomposed hierarchically by competition strategy. The Chaetoceros object was represented by skeleton tree by forming the rachis elements and branches into it. The similarity mode for microscopic images of Chaetoceros was established by defining the topological and geometric difference. …
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 …
Human Action Recognition Method Based On Key Frames,
2020
1. Department of Computer, Shenyang Aerospace University, Shenyang 110136, China;;2. Liaoning General Aviation Key Laboratory, Shenyang Aerospace University, Shenyang 110136, China;;3. College of Information, Liaoning University, Shenyang 110036, China;
Human Action Recognition Method Based On Key Frames, Xiangbin Shi, Shuanpeng Liu, Deyuan Zhang
Journal of System Simulation
Abstract: More and more researchers have begun to study the human action recognition based on depth information and skeleton information since the Kinect has been released. A method of human action recognition based on the skeleton feature of key frames is proposed in order to improve the accuracy and timeliness of the human action recognition, and reduce the computational complexity. The clustered data was obtained by using K-means clustering algorithm, and then the key frames were extracted by using the clustered data. Two features for human action recognition were extracted, one is the feature of the position of human joint, …
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 …
Development Of A Virtual Reality System For Space Planning Simulation,
2020
1. Institute of Robotics and Automatic Information System, Nankai University, Tianjin Key Laboratory of Intelligent Robotics, Tianjin 300071, China;;
Development Of A Virtual Reality System For Space Planning Simulation, Wenbo Yang, Yinhao Song, Zhao Xin
Journal of System Simulation
Abstract: A virtual reality platform for space simulation was developed to simplify the implementation of weapon and based design. First, the architecture of the simulation system was described briefly; Second, based on the characteristics of space simulation platform, several key modules were introduced, including terrain real-time generation, analysis of space layout, and closest distance calculation. The terrain generation for space simulation platform was based on database management. The closest distance calculation was based on nearest neighbor k-d tree searching. In addition, a three-dimensional (3-D) model library, containing vehicles, test equipment, plant facilities, and other tools, was established for dynamic loading …
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 …
Soft Shadow Map Method For Exploration Scene Simulation Of Lunar Rover,
2020
1. Key Lab of National Defense on Aerospace Flight Dynamics Technology, Beijing 100094, China;;2. Beijing Aerospace Control Center, Beijing 100094, China;
Soft Shadow Map Method For Exploration Scene Simulation Of Lunar Rover, Yang Cheng, Jianliang Zhou, Geshi Tang, Li Xie, Guangming Chen, Shushi Liu
Journal of System Simulation
Abstract: Scene simulation technology has gained a vast range of application in many different fields, such as aerospace measurement and controlling, by displaying the mission process and flight status in 3D real-time graphics interactively, which provided a comprehensive and intuitive controlling platform. The lunar exploration has been implemented with unmanned lunar rovers to detect the environments of the moon. Tele-operation was adopted to control the whole process by making and sending detecting plan and programming to the rover, in which the position of the sun was the key constraint condition. An effective real-time soft shadow map algorithm was presented to …
3d Model Retrieval Based On Hand-Drawn Sketches,
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;
3d Model Retrieval Based On Hand-Drawn Sketches, Dianhui Mao, Huanpu Yin, Haisheng Li, Cai Qiang
Journal of System Simulation
Abstract: Currently, retrieve 3d models use hand-drawn sketch as query has become an active research field. In the Bag of Feature (BoF) framework, the granularity of the distinction and expression brought by the "hard clustering" is insufficient. To solve this problem, a new method was proposed: GALIF feature was extracted from each sketch and the set of view images of models. BOF was replaced by a feature coding based on “soft clustering”--Gaussian mixture model. A fast and effective manifold ranking algorithm was used to calculate the manifold similarity between images, giving the final retrieve results. The previous methods …
Discussion Of Integrating Biological-Chemical Hazard Simulation And Artificial Society Computational Experimental Platform,
2020
National University of Defense Technology, Changsha 410073, China;
Discussion Of Integrating Biological-Chemical Hazard Simulation And Artificial Society Computational Experimental Platform, Sihang Qiu, Xiaogang Qiu, Bin Chen
Journal of System Simulation
Abstract: Biological-chemical hazard once brought great loss to human beings, which encouraged people to develop a number of biological-chemical simulation models and corresponding simulation tools. However, influences of hazards to society were rarely considered in the past. By integrating biological-chemical simulation and artificial society computational experimental platform, it was feasible to assess hazard and analyze its social effects meanwhile, which efficiently assisted manager to estimate hazard risk and make decisions. Two methodologies of integration and a corresponding example were given.
Active-Combine-Passive Homing Trajectory Simulation And Accuracy Analysis For Anti-Torpedo Torpedo,
2020
1. College of Marine Engineering, Northwestern Ploytechnical University, Xi'an 710072, China;;;2. Underwater Information and Control Laboratory, Xi'an 710072, China;
Active-Combine-Passive Homing Trajectory Simulation And Accuracy Analysis For Anti-Torpedo Torpedo, Congshan Xiao, Huizhen Yang
Journal of System Simulation
Abstract: An active-combine-passive homing model was established based on mathematics model of relative motion and automatically-adjust-lead-angle method. A simulation method of working process was designed about the active-combine-passive homing and simulates the trajectory. The influence on the guidance accuracy caused by homing range, sector angle and active-homing cycle was analyzed by using Monte Carlo method. Simulation result indicates that active-combine-passive homing owns a high level effect of interception, the guidance accuracy can be effectively improved by increasing homing range and homing sector angle and decreasing the active-homing cycle.
Group Decision Making Model For Weapon Selection Using Extended Vikor Method Under Intuitionistic Fuzzy Environment,
2020
College of Information System and Management, National University of Defense Technology, Changsha 410073, China;
Group Decision Making Model For Weapon Selection Using Extended Vikor Method Under Intuitionistic Fuzzy Environment, Shanliang Yang, Wang Peng, Li Ge, Kedi Huang
Journal of System Simulation
Abstract: With respect to weapon system selection problem, in which attribute weights are completely unknown and attribute values are expressed with linguistic information, a multi-attribute group decision-making method based on extended VIKOR was proposed. The intuitionistic fuzzy weighted averaging (IFWA) operator was introduced to aggregate all the individual decision-making information in order to obtain the intuitionistic fuzzy decision matrix. The intuitionistic fuzzy entropy method was utilized to obtain the objective weights of evaluation criteria. The alternative weapon systems were ranked according to the basic concept of extended VIKOR method. A case study of air-to-ground guided missile selection problem for UCAV …
Research On Attitude Controller Based On Modified Adaptive Robust Sliding Mode In Low-Flying,
2020
1. State Key Laboratory of Virtual Reality Technology and System, Beihang University, Beijing 100191, China;;2. School of Automation Science and Electrical Engineering, Beihang University, Beijing 100191 , China;;3. Science and Technology on Aircraft Control Laboratory, Beihang University, Beijing 100191, China;
Research On Attitude Controller Based On Modified Adaptive Robust Sliding Mode In Low-Flying, Yunjie Wu, Chuang Song, Jingxing Zuo
Journal of System Simulation
Abstract: Regarding inertia uncertainties, external disturbances and severe nonlinear coupling factors among the three channels including pitching, yawing and rolling at low-flying, controller design of wide adaptability could quickly and precisely realize the spacecraft attitude tracking control in a limited time. Based on the nonlinear model of the aircraft attitude, a kind of modified controllers was designed based on a robust adaptive sliding mode controller in the finite time convergence among three channels, the controller is continuous and differentiable. The adaptive controller was improved to stop a large controller output. Simulation results show that the designed attitude controller can …
