Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Simulation (135)
- Path planning (76)
- Genetic algorithm (48)
- Deep learning (46)
- Digital twin (46)
-
- Numerical simulation (45)
- Virtual reality (42)
- Multi-objective optimization (40)
- Modeling and simulation (39)
- Particle swarm optimization (35)
- Reinforcement learning (35)
- Modeling (33)
- Fault diagnosis (29)
- Attention mechanism (28)
- Deep reinforcement learning (28)
- UAV (26)
- Neural network (25)
- Simulation model (25)
- System simulation (24)
- Complex network (22)
- System dynamics (21)
- Virtual simulation (21)
- Visualization (21)
- DRL (20)
- Optimization (19)
- Trajectory planning (19)
- Multi-agent (18)
- Parameter identification (17)
- Permanent magnet synchronous motor (17)
- Traffic simulation (17)
- Publication Year
Articles 2131 - 2160 of 3924
Full-Text Articles in Entire DC Network
Formation Cooperation Of Computer Generated Forces Organization, Shaobin Sun, Shinan Zhang, Dong Bo
Formation Cooperation Of Computer Generated Forces Organization, Shaobin Sun, Shinan Zhang, Dong Bo
Journal of System Simulation
Abstract: Cooperation is the base of Computer Generated Forces team behaviors; formation and formation changing are the mostly used team cooperation of tank unit CGF. By combining cooperation planning with joint intention, a formation cooperation method for tank unit CGF was promoted. According to the knowledge levels of different CGF roles about the cooperation, the commander role CGF planed conditions and restraints of the formation cooperation, and the subordinated CGF autonomy planed to concretely implement the cooperation, which significantly enhanced the formation cooperation efficiency. The joint intention was established before the implementation of the cooperation, all CGF revised cooperation action …
Modeling And Simulation On Railway Bulk Oil Transit Operations, Jingheng Ma, Xingchang Liu, Youhong Fan, Kang Jin
Modeling And Simulation On Railway Bulk Oil Transit Operations, Jingheng Ma, Xingchang Liu, Youhong Fan, Kang Jin
Journal of System Simulation
Abstract: The railway bulk oil transit operation is a hybrid (discrete/continuous) system because of the main body of the continuous flow oil and a variety of discrete events. According to the system’s characteristics of complex process, great difficulty, high risk, the oil transit operation model was established based on discrete rate simulation and system’s continuity, predict events, emergencies were analyzed. The model was converted into linear programming, the effective rate was calculated under constraints, and the operation process and event scheduling was simulated. It was verified that the model is feasible. By obtaining the dynamic behavior and real-time data, its …
Research On Network Emulation Method Based On Shared Library Integration, Mingqing Zhang, Leigang Sun, Hongshan Kong, Xianqing Qi
Research On Network Emulation Method Based On Shared Library Integration, Mingqing Zhang, Leigang Sun, Hongshan Kong, Xianqing Qi
Journal of System Simulation
Abstract: For the high-risk, high-cost to test equipments in real network and the poor accuracy of software simulation, network emulation method was introduced; the integration between real application and simulation system is the key technology. According to the mapping principle between real device and virtual network, a network emulation model framework was proposed; the OMNeT++ simulator on the source code lever was designed; the network emulation method based on shared library integration was proposed; the problems of thread error, time distortion and symbolic space in the process of integration were discussed, and corresponding solutions were given; the correctness …
Identification And Visual Analysis Of Structure Characteristics Of Severe Storm, Jiayi Xu, Xuanxuan Huang
Identification And Visual Analysis Of Structure Characteristics Of Severe Storm, Jiayi Xu, Xuanxuan Huang
Journal of System Simulation
Abstract: A technique of adaptively extracting the feature regions from radar storm data was proposed based on the meteorological radar theory and historical statistics. A logical analysis strategy was proposed to identify convective cores, searched full convective regions to extract isolated storm cells. The changing of reflectivity data and corresponding gradient were analyzed to classify four typical structures. In order to accurately show the extracted spatial structures of storm cell, a parallel rendering framework was constructed by improving the ray-casting algorithm. Experiment results show that the proposed technique can quickly and accurately identify and visualize the spatial structure of sever …
Improved Support Vector Pre-Extracting Algorithm In Speech Recognition Application, Hao Rui, Yanbo Niu, Xiu Lei
Improved Support Vector Pre-Extracting Algorithm In Speech Recognition Application, Hao Rui, Yanbo Niu, Xiu Lei
Journal of System Simulation
Abstract: Support vector machine (SVM) training is difficult for large-scale data set of speech recognition. A new SVM pre-extracting algorithm was proposed. On the one hand, kernel Fuzzy C-Means clustering was separately performed on each class of original data set. All the cluster centers were as a representative set of each class. On the other hand, according to the geometric distribution of support vectors and combined with the classification strategy of one-versus-one for SVM multi-class classification algorithm, boundary samples were extracted as support vectors for SVM to training and prediction. The algorithm was applied to embedded speech recognition system. Experiments …
Trusted Scheme For Defending On-Off Attack Based On Beta Distribution, Weidong Fang, Zhidong Shi, Lianhai Shan, Fengrong Li, Xiuzhi Wang
Trusted Scheme For Defending On-Off Attack Based On Beta Distribution, Weidong Fang, Zhidong Shi, Lianhai Shan, Fengrong Li, Xiuzhi Wang
Journal of System Simulation
Abstract: Using encryption and authentication mechanisms can only prevent external attacks, but these mechanisms for internal attacks are invalid in Wireless Sensor Networks (WSNs). On-off attack also belongs to internal attacks, which has more concealment and aggressive, due to its reputation value dynamic changing. By using difference value and trend analysis based on BETA distribution, an effective trust mechanism was proposed to defend On-off attack. Simulation shows that this scheme can defend On-off attack, and be easy to implement.
Simulation And Evaluation On Handling Stability Of Wheeled Self-Propelled Gun Based On Virtual Prototype, Huibin Hu, Shuxiao Chen, Linlin Li, Liqiao Liu, Lijun Cao
Simulation And Evaluation On Handling Stability Of Wheeled Self-Propelled Gun Based On Virtual Prototype, Huibin Hu, Shuxiao Chen, Linlin Li, Liqiao Liu, Lijun Cao
Journal of System Simulation
Abstract: Based on the summary of usual handling stability research methods, a new kind of simulation and evaluation technology for wheeled Self-Propelled Gun based on virtual prototype and actual equipment test was put forward. In MSC.ADAMS/Car environment, virtual prototypes of suspension, tire, steering, engine, transmission subsystems and wheeled Self-Propelled gun were established. Actual equipment test and simulation based on virtual prototype of invariable radius turning test were carried out. The creditability and accuracy of virtual prototype were verified by comparing the simulation results and the test data. Steady turning characteristics were taken as example to illustrate the handling stability …
Probability Hypothesis Density Filter Based On Adaptive Target Birth Intensity, Jingjing Wu, Lihua You, Wang Yao, Shujuan Song
Probability Hypothesis Density Filter Based On Adaptive Target Birth Intensity, Jingjing Wu, Lihua You, Wang Yao, Shujuan Song
Journal of System Simulation
Abstract: For probability hypothesis density (PHD) filter, that was not able to track birth targets of unknown position, PHD filter with adaptive target birth intensity was proposed. The track initiation algorithm was employed to detect positions of promising birth targets which were used to form the intensity function of birth targets, and an online estimation algorithm of spontaneous birth intensity was proposed. Adaptive target birth intensity was combined with the recursion of the PHD filter, and a solution to the PHD filter based on adaptive target birth intensity for linear Gaussian target dynamics was proposed. Simulation results demonstrate that …
Online Identification Path Following Cascade Control Of Non-Holonomic Mobile Robot, Zilong Liu, Shaokai Hu, Liu Jie, Yagang Wang
Online Identification Path Following Cascade Control Of Non-Holonomic Mobile Robot, Zilong Liu, Shaokai Hu, Liu Jie, Yagang Wang
Journal of System Simulation
Abstract: A DC motor driven wheeled mobile robot path following control problem was considered, where the robot model was regarded as a cascade system consisting of the equation of the drive motor and the mobile robot kinematics equations. Taking the output speed of motor-driven equation as the input of the kinematic equations, identifying these time-varying parameters of the driven equation online, adding the values after identification to the controller, a feedback linearization path following control scheme was proposed. The scheme both investigates the dynamic characteristics of kinematics model and motor drive, so that the results better follow the actual cases …
Adjacent Bit Xor Operation Based Test Data Compression Method, Yifei Cheng, Wenfa Zhan
Adjacent Bit Xor Operation Based Test Data Compression Method, Yifei Cheng, Wenfa Zhan
Journal of System Simulation
Abstract: Data compression is a very effective method to reduce the test cost. An adjacent bit XOR operation based test data compression method was proposed based on bitwise XOR operation between itself and its previous bit, which turned continuous series, such as a series of all 0s and all 1s into series of all 0s, and reversal series, such as a series of 01 and 10 into series of all 1s by bitwise XOR operation between adjacent bits. On one hand, the two kinds of series, continuous series and reversal series, were both taken into account, which decreased the number …
Gm(2,1) Model And Identification Algorithm Based Wind Power Generation Short-Term Prediction, Ziyun Wang, Zhicheng Ji
Gm(2,1) Model And Identification Algorithm Based Wind Power Generation Short-Term Prediction, Ziyun Wang, Zhicheng Ji
Journal of System Simulation
Abstract: A method based on the gray theory and identification model was proposed to predict the short-term wind power generation. GM(2,1) model was applied for establishing a wind speed prediction model with an iterative step. After the wind speed prediction procedure, a finite impulse response moving average nonlinear Hammerstein model was used in the modeling between wind speed and wind power generation. By adopting the stochastic gradient searching theory, a wind power generation forecasting algorithm was proposed. The proposed simulation shows that the presented method can forecast the real time power generation of wind turbine and raise the accuracy of …
Policies Conflict Detection Algorithm Coordinated Defense-Oriented Of Firewall And Ids/Ips, Qiu Song, Jiao Jian, Dongyang Zhang
Policies Conflict Detection Algorithm Coordinated Defense-Oriented Of Firewall And Ids/Ips, Qiu Song, Jiao Jian, Dongyang Zhang
Journal of System Simulation
Abstract: Coping with the distributed and complex threaten of networking attack, the requirement of coordinated defense of Firewall and IDS/IPS are becoming more and more urgent. As the existence of uncertainty of the judgment of Intrusion performed by IDS/IPS, Firewall and IDS/IPS often perform contradict action, that the same package matched the both rules of Firewall and IDS/IPS, and conflict arose, which would lead to illegal access control or deny of legal access control. The policies conflict detection algorithm of coordinated defense of Firewall and IDS/IPS were researched. The semantic models of firewall policy and IDS/IPS policy were proposed, the …
A Class Of Prediction Based Adaptive Pid Controller, Yanjun Liu, Yawen Mao
A Class Of Prediction Based Adaptive Pid Controller, Yanjun Liu, Yawen Mao
Journal of System Simulation
Abstract: The PID controller has been widely used in various industrial processes. However, for real practical control plants, their mechanisms, structures and operation conditions are different, and conventional tuning methods cannot always work in a desirable state. In order to improve the robustness and the stability of the control systems, advanced PID control algorithms have been attracted much attention. A prediction based adaptive control algorithm is proposed for CARIMA models, where the PID parameters can be tuned adaptively according to the parameters of the control plant. The key is minimizing a performance index which considers the quadratic predicted output, over …
High Accuracy And Stable Transient Process Design Of Orbit Control For Space Rendezvous And Docking, Kaikai Li, Weiwei Shang
High Accuracy And Stable Transient Process Design Of Orbit Control For Space Rendezvous And Docking, Kaikai Li, Weiwei Shang
Journal of System Simulation
Abstract: In the docking phase of orbit control task of space rendezvous and docking, smooth without overshoot, good robustness and fuel-saving control are required. To this end, a transient process for orbit control was proposed, and new controllers were designed on the basis of the transient process for the space rendezvous and docking. The ultimate goal was refined to the gradual arrival goal to build the transient process between the initial coordinate and the target coordinate of the system. The output of the transient process was designed as a smooth S-type curve. Three different orbit controllers of space rendezvous and …
Wood Structure Nondestructive Detection Based On Wavelet Analysis Ant-Colony Bp Network, Guoxiong Zhou, Xianyan Zhou, Jiejun Wang, Te Huang
Wood Structure Nondestructive Detection Based On Wavelet Analysis Ant-Colony Bp Network, Guoxiong Zhou, Xianyan Zhou, Jiejun Wang, Te Huang
Journal of System Simulation
Abstract: In view of the wood component glue line defect, a method of wood structure nondestructive detection was proposed based on ant colony BP neural network. The wood specimens 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 defect signal amplitude was needed to normalization. The wood component decomposition of ultrasonic signals was de-composite to different frequency channels by the domain band-pass characteristics of the wavelet frequency. By extract characteristic of the original signal …
Time-Cost Risk Analysis For Complex Product Development Project By Simulation, Baosen Yang, Yang Nan, Cui Li
Time-Cost Risk Analysis For Complex Product Development Project By Simulation, Baosen Yang, Yang Nan, Cui Li
Journal of System Simulation
Abstract: Since complex product R&D project is characteristic with more stochastic factors, a dynamic simulation model of stochastic activity network was established for complex product R&D projects by consideration of the activity iteration and its dynamic characteristics. The methods of describing task rework probability, rework impact, iteration rework policy and so on were researched deeply. A case study illustrates the modeling process and the result of simulation.
Simulation Study On Damage Localization Of Large Generator Stator Insulation Based On Guided Waves, Li Hao, Ruihua Li, Hu Bo, Pan Ling, Qiyi Guo
Simulation Study On Damage Localization Of Large Generator Stator Insulation Based On Guided Waves, Li Hao, Ruihua Li, Hu Bo, Pan Ling, Qiyi Guo
Journal of System Simulation
Abstract: A stator insulation damage localization method based on guided waves was proposed. The dispersive curve was obtained by solving the Rayleigh-Lamb equations. Finite structure models of four typical groundwall insulation damage, i.e. void, delamination, longitudinal and transverse crack were established by FEM software Abaqus, in which the excitation, acquisition and propagation properties of guided wave were numerical simulated. Based on that, wavelet scalogram was used to extract the flight time of damage-scattered wave to obtain the insulation damage location. Analysis was conducted to compare the location precision under each wave modes. Simulation results indicate that the method is …
Application Of Wavelet Packet Improved Reconstruction Algorithm To Energy Measurement Of Non-Linear Loads, Hualong Cai, Kun Xiao
Application Of Wavelet Packet Improved Reconstruction Algorithm To Energy Measurement Of Non-Linear Loads, Hualong Cai, Kun Xiao
Journal of System Simulation
Abstract: In order to realize high-accuracy measurement of nonlinear loads, an improved algorithm of harmonic energy measurement based on discrete wavelet packet decomposition and reconstruction was proposed. Frequency band and the corresponding number of decomposition layer were given according to the sampling number, window width and sampling frequency. To improve the non-ideal cut-off characteristic of wavelet filter and eliminate the frequency aliasing, the discrete Fourier and the inverse transformation were used to remove the extra frequency components. The calculation expression of harmonic power and the principle of harmonic energy measurement were listed. The simulation analysis of harmonic energy measurement …
Modeling And Simulation Of Rectifying Circuit For Simultaneous Wireless Information And Power Transfer, Zuxiang Zheng, Lenan Wu
Modeling And Simulation Of Rectifying Circuit For Simultaneous Wireless Information And Power Transfer, Zuxiang Zheng, Lenan Wu
Journal of System Simulation
Abstract: Simultaneous wireless information and power transfer (SWIPT) is intended to transmit information and energy simultaneously over the wireless channels. As a major component of SWIPT, a rectifying circuit is an essential influencing factor for power conversion efficiency of SWIPT. Closed-form equations of power conversion efficiency and input power of rectifying circuit were derived to predict the performance. This simplified model is useful for circuit design and optimization. The result of theoretical analysis and ADS simulation shows that Ultra Narrow Band (UNB) signal has a sine-like performance in wireless power transfer. Using UNB signal as a novel modulation scheme, and …
Research On Simulation Method Of Unconformity Surface In Rock Mass Based On Pfc3d, Teijun Cui, Yundong Ma, Laigui Wang
Research On Simulation Method Of Unconformity Surface In Rock Mass Based On Pfc3d, Teijun Cui, Yundong Ma, Laigui Wang
Journal of System Simulation
Abstract: In order to accurately simulate the rock mass, considering the effects of the unconformity to simulation, the method was purposed to simulate the different contact situation using PFC3D based on the Particle flow theory, include: integration, parallel unconformity, angular unconformity. Simulation step include: define the rock coordinate system; determine the key points of contact trend; use MATLAB to fit the trend curve and get the parameters; use PFM to construct the model; shaping contact surface using FISH according the parameters. The structured model satisfies the above requirements, which proved the model is close to the actual rock mass mechanics …
Insulation Optimization Of High Voltage Box Based On Finite Element Method, Fangcheng Lü, Jianqiao Ma, Hongyu Liu, Fochi Wang, Xie Jun, Buchao Jia, Yunxiang Guo, Li Min
Insulation Optimization Of High Voltage Box Based On Finite Element Method, Fangcheng Lü, Jianqiao Ma, Hongyu Liu, Fochi Wang, Xie Jun, Buchao Jia, Yunxiang Guo, Li Min
Journal of System Simulation
Abstract: The discharge between cable connector and box walls directly affects the operational reliability of CRH. Optimized design of the electric field distribution of the connector can improve stability of CRH. The sheath installation position, sheath structure and thickness of the insulation layer were analyzed to see its influence on the distribution of field intensity. The simulation results show that insulating jacket positioned at the high voltage end of cable connector can effectively improve the electric field distribution, insulation sheath should appress to the high voltage fitting end of the cable connector and also extend to the root of first …
Application Of Fuzzy Pid Control Based On Neutral Network On High/Low Temperature Environmental Simulation System, Jingwang Jiang, Yunjie Wu, Mengchen Wu
Application Of Fuzzy Pid Control Based On Neutral Network On High/Low Temperature Environmental Simulation System, Jingwang Jiang, Yunjie Wu, Mengchen Wu
Journal of System Simulation
Abstract: High/Low Temperature Environmental Simulation System is mainly used for the functional deploying test of the giant space deployable antenna and some large-scale structures at extreme high/low temperatures, and some other relevant tests. This project requests controlling the parameters of the system in a large range with high accuracy and no overshoot. Temperature control system has features of non-linearity, time-variant, and large delay, which seriously affect the speed and accuracy of the control. However, the conventional PID finds it difficult to achieve desired effect of control. A new scheme of compound control which is referred to as fuzzy-PID control based …
Collaborative Simulation Between Remote Laboratories Based On Fiber-Optic Reflective Memory, Chijun Tian, Shengbing Shen, Yanlei Li, Xianzong Wang, Zhuofeng Guo
Collaborative Simulation Between Remote Laboratories Based On Fiber-Optic Reflective Memory, Chijun Tian, Shengbing Shen, Yanlei Li, Xianzong Wang, Zhuofeng Guo
Journal of System Simulation
Abstract: Taking advantage of independently developed HY-FB2125G Fiber-Optic Reflective Memory network interface and HY-FHX8 fiber-optic hub, the fiber-Optic Reflective Memory network was built and high speed data contribution was realized. With the elaborate design of hub-centered network architecture, simulation laboratories have the ability to process collaborative experiment and reuse test resources, which provides powerful support to accomplish collaborative simulation experiments.
Application Of Flowsim For Traffic Management And Assessment In Shenzhen, Yuhan Jia, Jianping Wu, Yiman Du, Geqi Qi
Application Of Flowsim For Traffic Management And Assessment In Shenzhen, Yuhan Jia, Jianping Wu, Yiman Du, Geqi Qi
Journal of System Simulation
Abstract: Recently many traffic problems are faced by more and more cities. Since traditional method can no longer solve the above problems, and Transportation Demand Management (TDM) solutions are in desperate need. Also, as a successful application of Intelligent Traffic System (ITS), traffic simulation software has become an efficient way to carry out assessment for TDM. The implementation of congestion charge policy in Shenzhen was studied as a demonstration of TDM in China. Then the microscopic traffic simulation software, FLOWSIM, was introduced to simulate the traffic situation to do assessment of congestion charge. Based on the results, advices …
Knowledge Engineering In Simulation Of Parallel Military System, Xiaogang Qiu, Zhang Peng
Knowledge Engineering In Simulation Of Parallel Military System, Xiaogang Qiu, Zhang Peng
Journal of System Simulation
Abstract: Military model is the integration and representation of military knowledge. The main task of military simulation is either to verify the exist knowledge or to produce new knowledge about military activities. By computational experiment, it is able to gain new knowledge about the parallel military system, which is able to enrich the origin knowledge system. Combined with parallel system technology, it's possible to study the evolution process of military knowledge, which is able to help us understand the complexity of military system. From the perspective of knowledge engineering, the processes of knowledge integration, representation and evolution were studied, and …
Research On Dynamic Characteristics Of Hypersonic Vehicle Based On Large Scale Parallel Simulation, Hongyong Chen, Xuanhua Fan, Keying Wang, Fang Ye, Shifu Xiao
Research On Dynamic Characteristics Of Hypersonic Vehicle Based On Large Scale Parallel Simulation, Hongyong Chen, Xuanhua Fan, Keying Wang, Fang Ye, Shifu Xiao
Journal of System Simulation
Abstract: Based on the three predominant algorithms (Implicitly Restarted Krylov-Schur Method and Jacobi-Davidson Method ) and The PANDA Framework, a large-scale parallel computing system for modal analysis was established. The finite element model of typical wave-rider hypersonic vehicle was established and its dynamic characteristics were investigated. The numerical analysis reaches scale of 14,000,000 Degree of Freedoms (DOFs), and the number of MPI Cores is 1024. What's more, the difference of first 100 orders natural frequencies between PANDA and well known commercial software ANSYS is less than 0.01%, and mode shapes are absolutely the same, the efficiency of 1024 cores is …
Design Of Unified Algorithm For Sampling Mpdu, Ti Zhou, Miao Yi, Yang Jian
Design Of Unified Algorithm For Sampling Mpdu, Ti Zhou, Miao Yi, Yang Jian
Journal of System Simulation
Abstract: The standard of CCSDS AOS is used in space exploration because of the process of the standard airspace system. The spacecraft missions have used multi-protocol data unit (MPDU) to multiplex the package channels. The range of MPDU and the data are different in different spacecrafts. This process brings some problems in the maintenance and the correctness of the algorithms of virtual channel multiplexing in simulation system. The applications of CCSDS in the world were researched, and the general definitions of MPDU in these missions were described. A circle memory was given to buffer the data of MPDU, two general …
Wiftcpn Formalized Decision-Making For Auv Formation System Under Uncertainty, Lili Hao, Gu Hao, Fengju Kang, Huizhen Yang
Wiftcpn Formalized Decision-Making For Auv Formation System Under Uncertainty, Lili Hao, Gu Hao, Fengju Kang, Huizhen Yang
Journal of System Simulation
Abstract: Usually the acquired target information is not sufficient and certain enough due to inaccurate measurements, inconsistent granularity and noise, which results in the AUV formation decision-making system having some characteristics, such as discrete, time delay, hierarchical, fuzzy, inconsistencies. Therefore, an integrated formal approach of modeling, simulation and verification based on weighted intuitionistic fuzzy timed colored petri net (WIFTCPN) was proposed. The mapping relationship between WIFTCPN and fuzzy time, time delay and intuition fuzzy inference rules were established. Furthermore, corresponding reasoning decision simulation model under uncertain information was built by using CPN Tools. The properties including liveness, home and fairness …
Human Action Recognition Based On Self-Learning Feature And Hmm, Jiarui Wen, Lina Liu, Rui Ling, Shiwei Ma
Human Action Recognition Based On Self-Learning Feature And Hmm, Jiarui Wen, Lina Liu, Rui Ling, Shiwei Ma
Journal of System Simulation
Abstract: The current methods of human action recognition by computer vision are mostly based on hand-craft features and usually prior knowledge-required. They inevitably depend on specific applications and neglect the inner structure of visional information. A novel method which integrated self-learned pose features and combined posture symbol rules was proposed to achieve the recognition of human action more efficiently. The structural features of posture silhouette were extracted and a codebook of primary posture was built through the establishment of a sparse auto-encoder network. Then, in the phase of recognition, the Hidden Markov Model was employed to train the models …
Group-Based Image Compositing In Heterogeneous Environments, Liu Ning, Dengming Zhu, Zhaoqi Wang, Wei Yi
Group-Based Image Compositing In Heterogeneous Environments, Liu Ning, Dengming Zhu, Zhaoqi Wang, Wei Yi
Journal of System Simulation
Abstract: Image compositing requires dense inter-node communications and could easily become the bottleneck of a parallel visualization system. Conventional image compositing algorithms assume the environment is homogeneous and take no heterogeneity into consideration. In a heterogeneous environment, this assumption is likely to cause unreasonable load distribution among the nodes. To address this problem, we present a group-based image compositing algorithm in heterogeneous environments. It is able to distribute the workloads among the nodes according to computing and networking characteristics of the heterogeneous environments. We conduct a comprehensive evaluation on the ns-3 network simulator. Experiment results shows that when the environment …