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Live Memory Migration with Matrix Bitmap Algorithm

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Live Memory Migration with Matrix Bitmap Algorithm

2010 IEEE 2nd Symposium on Web Society

作者： wentian cui,meina song information Communication technology & Service Science Management and engineering Center School of computer Science and technology beijing university of Posts and Telecommunications,beijing,china

＜正＞Live migration of OS instance,a powerful instrument to facilitate system maintenance,load balancing,fault tolerance,has become the central issue of virtualization,while the memory Migration has always been the ***,exiting algorithms suffer two ***,when facing those frequently modified pages,the performance would degrade ***,though they do perform more preferable through some certain algorithms,the accessional resources are requisite, which might extraordinary scarce under heavy load *** imperfections will lead to striking performance degradation of virtual machine services. Therefore,based on the "Program Locality Principle ", this paper presents the "matrix bitmap algorithm " that collects the dirty page information for many times before deciding whether to transfer the page or *** provides a more reasonable approach to obtain the *** demonstrate that when under heavy load conditions,if sufficient dirty page information is collected,the decrease in total migration time will achieve 50%without increasing the system burden of the original domain.

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Predicting the behavior of large scale P2P systems by parallel discrete event simulation

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Science china.information Sciences) 2010年第6期53卷 1109-1121页

作者： ZHENG WeiMin1,YU HongLiang1,SHI GuangYu2 & CHEN Jian2 1Department of computer Science and technology,Tsinghua university,beijing 100084,china.2Huawei Technologies Co.,Ltd,Shenzhen 518129,china Department of computer Science and technology Tsinghua University Huawei Technologies Co. Ltd

P2P systems are becoming the dominator of *** systems are typically composed of thousands to millions of physical computers,which make it difficult to predict their behaviors without a large scale distributed system *** paper is an attempt to predict the behavior of large scale P2P systems by building a novel parallel simulator:AegeanSim,which provides parallel discrete event simulation of such systems on high performance server *** abstract the execution of P2P applications with a specific event model,and parallel the simulation of events in a cluster,thus expanding the simulation scale and boosting the simulation process dramatically.A 1-stage synchronization method is proposed to improve the *** event callback interface is designed to implement their application logic easily while keeping the simulator *** use AegeanSim to predict the behavior of a typical P2P system:*** comparing the simulation behavior of BT with that of related BT studies and verifying its efficiency,scalability and accuracy,we make predictions about the behavior of BT system assuming they are assaulted by different man-made system *** reasonable results are found:(1) Tracker isolation can hardly work because of its short attacking time window.(2) Limiting the bandwidth of BT may be an efficient way to control it.

关键词： P2P simulation parallel

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多维数据的信息可视化方法及应用研究

系统仿真学报 2008年第S1期20卷 327-329,333页

作者：陈谊谭桂龙北京工商大学计算机学院北京100037

将多维数据可视化可以帮助人们在有限的时间内快速理解和分析复杂的海量数据集,为决策提供依据。介绍了几种典型的多维数据可视化和交互方法;提出了用平行坐标和星形图技术对人体健康多维数据进行可视化和可视分析的设计方法,给出了可... 详细信息

将多维数据可视化可以帮助人们在有限的时间内快速理解和分析复杂的海量数据集,为决策提供依据。介绍了几种典型的多维数据可视化和交互方法;提出了用平行坐标和星形图技术对人体健康多维数据进行可视化和可视分析的设计方法,给出了可视化和分析结果,应用结果表明了这些方法有效性;本文介绍的多维数据可视化方法可应用于医学、金融、通信等多个领域。

关键词：多维数据信息可视化平行坐标星形图人体健康信息

维普期刊数据库

DESIGNING A HYBRID INTELLIGENT MINING SYSTEM FOR CREDIT RISK EVALUATION

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Journal of Systems Science & Complexity 2008年第4期21卷 527-539页

作者： Lean YU Shouyang WANG Fenghua WEN Kin Keung LAI Shaoyi HE Institute of Systems Science Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100190 China. School of Economy and Management Changsha University of Science ~ Technology Changsha 410076 China. Department of Management Sciences City University of Hong Kong Tat Chee Avenue Kowloon Hong Kong. Department of information Systems and Operations Management College of Business Administration Cali fornia State University San Marcos San Marcos CA 92096-0001 USA.

In this study, a novel hybrid intelligent mining system integrating rough sets theory and support vector machines is developed to extract efficiently association rules from original information table for credit risk evaluation and analysis. In the proposed hybrid intelligent system, support vector machines are used as a tool to extract typical features and filter its noise, which are different from the previous studies where rough sets were only used as a preprocessor for support vector machines. Such an approach could reduce the information table and generate the final knowledge from the reduced information table by rough sets. Therefore, the proposed hybrid intelligent system overcomes the difficulty of extracting rules from a trained support vector machine classifier and possesses the robustness which is lacking for rough-set-based approaches. In addition, the effectiveness of the proposed hybrid intelligent system is illustrated with two real-world credit datasets.

关键词： Credit risk evaluation hybrid intelligent system rough sets support vector machine.

维普期刊数据库

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DVE中的空间一致性及坐标转换

计算机工程与应用 2003年第15期39卷 56-59页

作者：陈谊北京工商大学计算机学院北京100037

在分布式交互仿真系统中,空间一致的分布虚拟环境(DVE)是得到正确仿真结果的基础。该文给出了DVE中常用的坐标系统,地心坐标系、测地坐标系、拓扑坐标系、实体坐标系和欧拉角定义,并推导了它们之间的转换公式。将这些公式应用在“多武... 详细信息

在分布式交互仿真系统中,空间一致的分布虚拟环境(DVE)是得到正确仿真结果的基础。该文给出了DVE中常用的坐标系统,地心坐标系、测地坐标系、拓扑坐标系、实体坐标系和欧拉角定义,并推导了它们之间的转换公式。将这些公式应用在“多武器平台综合仿真示范系统”的分布式虚拟环境中,解决了其中的空间一致性问题。系统运行结果证明了这些公式的正确性。

关键词：坐标转换空间一致性分布式虚拟环境

维普期刊数据库

The technology of Smart Antenna in IEEE 802.16

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The Technology of Smart Antenna in IEEE 802.16

2006北京地区高校研究生学术交流会

作者： Luo Dan Guo Li Xu Guang (School of information engineering, beijing university of Posts and Telecommunications, beijing 100876, china. (School of information engineering, beijing university of Posts and elecommunications, beijing 100876, china. (School of information engineering, beijing university of Posts and elecommunications, beijing 100876, china.

As is known to us, the technology of smart antenna in the mobile communication system would increase the capacity and spectrum efficiency, extend the system coverage etc. On the other hand, broadband wireless access (BWA) has become the best way to meet escalating business demand for rapid Internet connection and integrated data, voice and video services. IEEE 802.16 has mentioned the technology of smart antenna as optional part but not in very detail. The purpose of this paper is to bring forward a MAC protocol of base station (BS) with multi-beam antenna system and subscribers (SS) with adaptive array systems to accomplish the access control practically.

关键词： IEEE 802.16 MAC Smart Antenna

The Application of Graph Diffusion in High-level Feature Extraction

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The Application of Graph Diffusion in High-level Feature Ext...

2011 4th IEEE International Conference on computer Science and information technology(ICCSIT 2011)

作者： Xiaohan Du School of information and Communication engineering beijing university of Posts and Telecommunications beijing china.100876 Honggang Zhang School of information and Communication engineering beijing university of Posts and Telecommunications beijing china.100876

In this paper,a new graph diffusion method is presented to improve the high-level feature extraction *** this method,we construct a semantic graph by describe the concepts as nodes and the concept affinities as the weights of edges,then we use the training set and its corresponding label matrix to estimate the concept relationship,where the relationship of two concepts were measured by the inner product of its corresponding row *** test the method on the high-level feature extraction task of TRECVID 2009 and the experimental results show the effectiveness of the method.

关键词： high-level feature extraction inner product graph diffusion,image retrieval

A Research on Medium-sized and Small Enterprises Financial Risk Early Warning information System Design

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A Research on Medium-sized and Small Enterprises Financial R...

2011 IEEE 2nd International Conference on Software engineering and Service Science(ICSESS 2011)

作者： Fen Tian Yu Zhang The internship center to business and law beijing technology and business university beijing china

Financial risk pre-warning plays an important role in financial risk *** aim to build an ideal financial risk warning system of SME according to the analysis of financial risks in small and medium enterprises （SMES）.The present research firstly analyze the financial risks of SMEs,secondly propose the design of financial analysis pre-warning information system for SMEs from the system structure,database,early warning mechanisms and other aspects.

关键词： SMEs financial risk information warning system

Dynamic Calculation And Analysis on The Effect of Mine Blasting Vibration to Tailing Dam

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Dynamic Calculation And Analysis on The Effect of Mine Blast...

2010 4th International Conference on Intelligent information technology Application (IITA2010)

作者： Lu Shu-ran School of Safty and Environmental engineering Capital university of Economics and business beijing china.Tao Tie-jun Civil & Environment engineering School university of Science and technology beijing beijing china

A large number of mining tailings pond were built in the upstream of the stope close neighbor to it,those distance is between 200 to *** tailings dam constructed at upstream is always in under-consolidated,and has low density and loose structure,the liquefied zone appears easily in the effect of mining blasting,and then the dam body is *** at one tailings dam of mining corporation,the horizontal vibration acceleration produced by mining blasting is field measured,then the measured data is adopted as the input ground vibration wave,and the response of tailing dam is analysed with dynamic finite element *** analysis result shows that the response of the latter accumulation dam is larger than that of initial dam,and there is no liquefied zone in tailing dam under blasting ***,it can be regarded that the current production blasting scale does not produce bad influence to the stability of dam *** provide a reference for the similar engineering in the future.

关键词： vibration tailings dam seepag liquefaction stability