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International Conference on Cyberspace technology, CCT 2013

作者： Ban, Xiaojuan Gan, Bin Wu, Ping School of Computer and Communication Engineering of University of Science and Technology Beijing Beijing 100083 China Science and Technology on Complex Systems Simulation Laboratory Beijing 100012 China

ISBN: (纸本)9781849198011

The load balancing problem is becoming the main technical obstacle in HLA distributed simulation development with the increasing scale of distributed simulation system. The solution of task-federate mapping and federate-processor mapping used to be determined based on experiences and the entity is taken as a task granularity in simulations in order to simplify the model in previous studies. Neither the experience methods nor the previous studies could solve the huge communication overhead or load imbalance problem effectively in large scale distributed simulation. The static load balancing optimization of HLA distributed simulation is divided into task-federate mapping and federate-processor mapping, and a two-stage mapping allocation optimization method is proposed in this paper. Decreasing communication overhead of the system is the main mission in the taskfederate mapping stage and the load balancing is studied in the federate allocation stage. The effectiveness of the proposed method, which developed a new direction for static load balancing distribution optimization in distributed simulations, is verified with experiments.

关键词： Mapping

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An iterative space alternative tiling parallel algorithm for 3D finite difference stencil computations

International Journal of Database Theory and Application

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International Journal of Database Theory and Application 2014年第6期7卷 105-120页

作者： Shen, Jing Zhang, Jilin Wan, Jian Zhou, Li Jiang, Ming School of Computer Science and Technology Hangzhou Dianzi University Hangzhou Zhejiang China Key Laboratory of Complex Systems Modeling and Simulation Ministry of Education China Zhejiang Provincial Engineering Center on Media Data Cloud Processing and Analysis Hangzhou China School of Information Engineering Hangzhou Dianzi University Hangzhou Zhejiang China

Stencils are finite-difference algorithms for solving large-scale and high-dimension partial differential equations. Due to the data dependences among the iterative statements in Stencils, traditional Stencil computations are be executed serially, rather than in parallel. It's challenging to design an effective and scalable Stencil parallelized method. To address the issue of 3D data space computing, we present a serial execution model based on multi-layers symmetric Stencil method and time skewing techniques. Within this model, the iteration space is divided to multiple tiles based on time skewing, where the executive process is ordered by the sequence of tiles, and the nodes in each individual tile can be swept repeatedly to improve the data locality. In addition, we propose a novel 3D iterative space alternate tiling Stencil parallel method, which subdivides the iteration space along high dimension, and changes the execution sequence of tiles to reduce the data dependency and communication cost, where the partial order of tiles is still guaranteed. Experimental results demonstrate our proposed alternative tiling parallel method achieves better parallel efficiency and scalability compared with the domain-decomposition methods.

关键词： Iterative methods

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The application of entropy weighting ideal point method in electronic information equipment system of systems construction decision-making

The application of entropy weighting ideal point method in e...

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2013 International Conference on Mechanical and Electronics Engineering, ICMEE 2013

作者： Zhao, Zhi Qiang Wang, Zhi Gang College of Mechaeronics Engineering and Automation National University of Defense Technology Changsha Hunan 410031 China Science and Technology on Complex land Systems Simulation Laboratory Beijing 100012 China

ISBN: (纸本)9783037858103

The equipment system of systems (ESoS) construction risk analysis is great significance to enhance decision-making and management level of information technology ESoS construction. The concept of entropy in the information engineering is using to calculate the entropy, and the entropy weight is used to fix subjective weight, after that Combining ideal point method to evaluate and select the schemes, the best decision of ESoS construction is get. The model is of impersonality and in reason, which provided a simple and practical method for construction risk evaluation of electronic information ESoS. © (2013) Trans Tech Publications, Switzerland.

关键词： Decision making

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Research on simulation-experimentation-based effectiveness evaluation of digitized forcespi0215es command and control system

Research on simulation-experimentation-based effectiveness e...

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13th International Conference on systems simulation, AsiaSim 2013

作者： Fang, Zhao Tao, Zhang Xin, Wei Jun, Zhao Xin College of Automation Science and Electrical Engineering Beijing University of Aeronautics and Astronautics Beijing 100191 China Science and Technology on Complex Simulation Land Systems Simulation Laboratory Beijing 100072 China Naval Academy of Armament 100036 China

ISBN: (纸本)9783642450365

Pitched at problems needing to be solved for evaluating the digitized forcespi0215es command & control (DF C2) system, this paper proposes the major contents and processes for evaluating the C2 systemspi0215es effectiveness based on simulation experimentation, lays down the Measures of Efficiencies(MoEs) system of effectiveness evaluation (EE) for the C2 system, and analyzes, through the design of experiment samples and the planning of the evaluation process, how to use the simulation-experiment approaches of comparison and statistics to conduct effectiveness evaluation, contribution analysis and optimization analysis of the C2 system. © Springer-Verlag Berlin Heidelberg 2013.

关键词： Design of experiments

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An Architectural Approach for Capability Mapping and Gap Analysis

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Journal of systems science and Information 2013年第1期1卷 86-96页

作者： Kewei YANG Bingfeng GE Qingsong ZHAO Jiang JIANG Science and Technology on Complex Systems Simulation Laboratory National University of Defense Technology College of Information System and Management

To cope with the increasing complexity and constantly changing capability requirements of system-of-systems, an architectural approach for capability mapping and gap analysis is ***, a more specific architecture framework is presented. Secondly, on the basis of the analysis of the semantic relationships between constituent architecture data elements, a capability mapping approach is proposed to manage the relations between capabilities and systems based on the mapping matrixes representing associations of core entities. Then, a four-step capability mapping process for the mapping from capabilities to systems is suggested. Moreover, the capability gap analysis on how to identify and fill the capability gaps is also studied. Finally, an example of specific Net-Centric Warfare mission of Precision Engagement is used to illustrate the feasibility of the approach.

关键词： system-of-systems capability architecture description mapping matrixes core entities gap analysis

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A two-stage allocation optimization in static load balancing of HLA distributed simulation

A two-stage allocation optimization in static load balancing...

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International Conference on Cyberspace technology (CCT 2013)

作者： Xiaojuan Ban Bin Gan Ping Wu School of Computer and Communication Engineering of University of Science & Technology Beijing 100083 China Science and Technology on Complex Systems Simulation Laboratory Beijing 100012 China

ISBN: (纸本)9781632660015

The load balancing problem is becoming the main technical obstacle in HLA distributed simulation development with the increasing scale of distributed simulation system. The solution of task-federate mapping and federate-processor mapping used to be determined based on experiences and the entity is taken as a task granularity in simulations in order to simplify the model in previous studies. Neither the experience methods nor the previous studies could solve the huge communication overhead or load imbalance problem effectively in large scale distributed simulation. The static load balancing optimization of HLA distributed simulation is divided into task-federate mapping and federate-processor mapping, and a two-stage mapping allocation optimization method is proposed in this paper. Decreasing communication overhead of the system is the main mission in the task-federate mapping stage and the load balancing is studied in the federate allocation stage. The effectiveness of the proposed method, which developed a new direction for static load balancing distribution optimization in distributed simulations, is verified with experiments.

关键词： Distributed simulation Optimization Static Load Balancing Load balancing HLA Antigens HIGH LEVEL ARCHITECTURE simulating Balance impairment Distribute MAPPING(MATHEMATICAL) simulation systems

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Research of interacting multiple model particle filter based on passive multi-sonar

Research of interacting multiple model particle filter based...

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OCEANS

作者： Xueli Sheng Chunyan Sun Qing Ling Jia Lu Jingwei Yin Longxiang Guo Science and Technology on Underwater Acoustic Laboratory Harbin Engineering University College of Underwater Acoustic Engineering Harbin Engineering University Science and Technology on Complex Ship Systems Simulation Laboratory Beijing China

ISBN: (纸本)9781479913084

The passive target tracking problem of multi-sonar belongs to nonlinear problem, and the background noise is not guass noise entirely, so a kind of filtering method which suit for nonlinear and non-guassian system of is needed. In this paper, the interacting multiple model particle filter which combined by particle filter and interacting multiple model is applied in tracking maneuvering target. Combing the particle filter's ability of disposing nonlinear and non-guass problem and the IMM's ability of tracking target's arbitrary maneuvering, the difficulty that traditional filter encounters in tracking maneuvering target under the circumstance of nonlinear and non-guassian can be solved. The interacting multiple model particle filter is simulated in two different model set, the results indicate that, under the case of model matching, this method has good ability in tracking the maneuvering target of nonlinear and non-guassian system.

关键词： Mathematical model Particle filters Target tracking Equations Noise Radar tracking Filtering algorithms

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The research on the coverage area of multistatic sonar under various work modes

The research on the coverage area of multistatic sonar under...

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OCEANS

作者： Jia Lu Xueli Sheng Qing Ling Jiang Xu Yanyi Yuan College of Underwater Acoustic Engineering Harbin Engineering University Harbin China Science and Technology on Complex Ship Systems Simulation Laboratory Beijing China

Absorption loss which is an important characteristic in the field of underwater acoustic, caused by sea water is often neglected in the research on the coverage area of bistatic sonar, in this article, the coverage area of bistatic sonar considering absorption loss is studied. When multistatic sonar works in different modes, detection criterion varies, so the coverage area can't be considered as the direct sum of coverage area of each bistatic sonar unit. This article discussed the coverage area respect to the most relaxed criterion and the most strict criterion.

关键词： Propagation losses Absorption Sonar detection Receivers Underwater acoustics

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Lit: A high performance massive data computing framework based on CPU/GPU cluster

Lit: A high performance massive data computing framework bas...

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IEEE International Conference on Cluster Computing

作者： Yanlong Zhai Emmanuel Mbarushimana Wei Li Jing Zhang Ying Guo Beijing Engineering Research Center of Massive Language Information Processing Beijing Institute of Technology Beijing China Science and Technology on Complex Systems Simulation Laboratory Beijing China

Big data processing is receiving significant amount of interest as an important technology to reveal the information behind the data, such as trends, characteristics, etc. MapReduce is considered as the most efficient distributed parallel data processing framework. However, some high-end applications, especially some scientific analyses have both data-intensive and computation-intensive features. Current big data processing techniques like Hadoop are not designed for computation-intensive applications, thus have insufficient computation power. In this paper, we presented Lit, a high performance massive data computing framework based on CPU/GPU cluster. Lit integrated GPU with Hadoop to improve the computational power of each node in the cluster. Since the architecture and programming model of GPU is different from CPU, Lit provided an annotation based approach to automatically generate CUDA codes from Hadoop codes. Lit hided the complexity of programming on CPU/GPU cluster by providing extended compiler and optimizer. To utilize the simplified programming, scalability and fault tolerance benefits of Hadoop and combine them with the high performance computation power of GPU, Lit extended the Hadoop by applying a GPUClassloader to detect the GPU, generate and compile CUDA codes, and invoke the shared library. Our experimental results show that Lit can achieve an average speedup of 1x to 3x on three typical applications over Hadoop.

关键词： Graphics processing units Computational modeling Handheld computers Data models Load modeling Semantics

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New progress in geometric computing for image and video processing

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Frontiers of Computer science 2012年第6期6卷 769-775页

作者： Jinjiang LI Hanyi GE Department of Computer Science and Technology Tsinghua UniversityBeijing 100084China Science and Technology on Complex Systems Simulation Laboratory Beijing 100101China

In recent years, geometry-based image and video processing methods have aroused significant interest. This paper considers progress from four aspects： geometric characteristics and shape, geometric transformations, e... 详细信息

关键词： image video geometric computing geometric patterns embedded geometry structure

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