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Communication network designing:Transmission capacity,cost and scalability

Science china(Information Sciences) 2012年第11期55卷 2454-2465页

作者： zhang guoqiang1,2.3.& zhang guoqing1 1institute of computing technology,Chinese {2. of Sciences,{3.,china 2.chool of Computer Science and technology,Nanjing Normal University,Nanjing 2.0046,china 3.rovincial Key Laboratory for Computer Information Processing technology,Soochow University,Suzhou 2.5000,china 1. institute of computing {2. Chinese Academy of Sciences Beijing 100190 China2. School of Computer Science and Technology Nanjing Normal University Nanjing 210046 China3. Provincial Key Laboratory for Computer Information Processing Technology Soochow University Suzhou 215000 China

Despite the growing number of works centering around the traffic dynamics on complex networks,these researches still have some common shortcomings,e.g.,too simple traffic flow model and lack of considerations for the designing cost and scalability *** paper builds on a more realistic traffic flow model,and offers a holistic view on the network designing *** addition to the extensively studied transmission capacity,this paper takes designing cost and scalability as two other designing objectives,and presents a quantitative study of how different designing choices independently and collectively influence these objectives by the introduction of a cartesian coordinate *** is shown that different kinds of network topologies display different shapes of achievable solution spaces and exhibit different abilities to achieve cost-effective and scalable *** particular,we find the philosophy underlying empirical network designing and engineering today fails to meet the cost-effective and scalable designing requirements,and propose a cost-effective and scalable designing scheme for BA-like networks,i.e.,the efficient routing combined with effective betweenness based link bandwidth *** addition,when designing a thoroughly new network from the beginning,we find that ER network is a good candidate to achieve cost-effective and scalable designing in most settings.

关键词： cost-effective communication network designing network transmission efficiency network topology traffic dynamics next generation network scalable network designing

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Identifying heavy hitters in high-speed network monitoring

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Science china(Information Sciences) 2010年第3期53卷 659-676页

作者： zhang Yu1, FANG BinXing1,2.& zhang YongZheng2.1Research Center of Computer Network and Information Security {2., Harbin institute of {2., Harbin 150001, china 2.esearch Center of Information Security, institute of computing {2., Chinese academy of Sciences, {13., china 1. Research Center of Computer Network and Information Security technology Harbin Institute of Technology Harbin 150001 China2. Research Center of Information Security Institute of Computing Technology Chinese Academy of Sciences Beijing 100190 China

Identifying heavy hitters in a network traffic stream is important for a variety of network applications ranging from traffic engineering to anomaly detection such as detection of denial-of-service attacks. Existing methods generally examine newly arriving items in the stream, perform a small number of operations using a small amount of memory, and still provide guarantees on the identifying accuracy. In high-speed network monitoring, the update speed per item is extremely critical. However, so far as we know, there are no identifying algorithms which can provide constant update time (O(1)) in a weighted data stream. In this paper, we present an algorithm named Weighted Lossy Counting (WLC) which is able to identify heavy hitters in a high-speed weighted data stream with constant update time. WLC employs a novel efficient partially ordered data structure which is able to provide a fast per-item update speed while keeping the memory cost relatively low. We compare WLC with state-of-the-art algorithms for finding heavy hitters in real traffic traces. The experimental results show that WLC performs well in accuracy (recall, precision and average relative error) as other algorithms; moreover it has a much higher update speed at the cost of relatively larger memory space used. A theoretical worst-case memory bound of WLC is also derived in this paper; however, experiments with long real traffic traces show that WLC requires much less space than the theoretical bound in practice.

关键词： network traffic monitoring heavy hitter weighted data streams

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Analysis of moment invariants under general linear transformation

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Science china(Information Sciences) 2010年第7期53卷 1305-1311页

作者： DIAO LuHong1, LI Hua2. zhang Sen1 & LIU Lei1 1College of Applied Sciences, beijing University of {2., beijing 10012., china 2.ational Center of Intelligent computing, institute of computing {2., Chinese academy of Science, beijing 100080, china 1. College of Applied Sciences Beijing University of Technology Beijing 100124 China2. National Center of Intelligent Computing Institute of Computing Technology Chinese Academy of Science Beijing 100080 China

This paper presents the necessary and sufficient condition of moment invariants under general linear transformation. Based on this condition, arbitrary order and dimensional moment invariant sets can be constructed. D... 详细信息

关键词： moment invariants independence linear transformation

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P2. traffic optimization

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Science china(Information Sciences) 2012年第7期55卷 1475-1492页

作者： zhang guoqiang 1,2 ,TANG MingDong 3.,CHENG SuQi 2,4 ,zhang {3. 2 ,SONG HaiBin 5 ,CAO JiGuang 6 & YANG Jing 7 1 School of Computer Science and technology,Nanjing Normal University,Nanjing 210046,china 2 institute of computing technology,Chinese academy of Sciences,beijing 100190,china 3.School of Computer Science and Engineering,Hunan University of Science and technology,Xiangtan 411201,china 4 Graduate University of Chinese academy of Sciences,beijing 100190,china 5 Nanjing R&D Center,Huawei Technologies,Nanjing 210012,china 6 china academy of Telecommunication Research of MIIT,beijing 100191,china 7 china Mobile Research institute,beijing 100053.china 1. School of Computer Science and technology Nanjing Normal University Nanjing 210046 China2. Institute of Computing Technology Chinese Academy of Sciences Beijing 100190 China3. School of Computer Science and Engineering Hunan University of Science and Technology Xiangtan 411201 China4. Graduate University of Chinese Academy of Sciences Beijing 100190 China5. Nanjing R&D Center Huawei Technologies Nanjing 210012 China6. China Academy of Telecommunication Research of MIIT Beijing 100191 China7. China Mobile Research Institute Beijing 100053 China

Peer-to-peer (P2.) based content distribution systems have emerged as the main form for content distribution on the Internet,which can greatly reduce the distribution cost of content providers and improve the overall system ***,the mismatch between the overlay and underlay networks causes large volume of redundant traffic,which intensifies the tension between P2. content providers and ***,how to efficiently use network resources to reduce the traffic burden on the ISPs is crucial for the sustainable development of P2. *** paper surveys the state-of-art P2. traffic optimization technologies from three perspectives:P2. cache,locality-awareness and data *** details,comparison between these technologies and their applicabilities are presented,followed by a discussion of the issues that remain to be addressed and the direction of future content distribution research.

关键词： P2. traffic localization P2. traffic optimization P2. cache locality-awareness network coding content-centric network

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Multiparty simultaneous quantum identity authentication with secret sharing

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Science china(Physics,Mechanics & Astronomy) 2008年第3期51卷 321-327页

作者： YANG YuGuang1,2.WEN QiaoYan3.& zhang Xing4,5 1 College of Computer Science and technology,{2. University of technology,{2. 10002.,china 2.State Key Laboratory of Information Security (Graduate University of the Chinese academy of Sciences),{2. 100049,china 3.School of Science,{2. University of Posts and Telecommunications,{2. 100876,china 4 {12. of Electronic technology,Information Engineering University,Zhengzhou 450004,china 5 Trusted computing Laboratory,{2. University of technology,{2. 10002.,china College of Computer Science technology Beijing University of Technology Beijing 100022 China State Key Laboratory of Information Security [Graduate University of the Chinese academy of Sciences] Beijing 100049 China School of Science Beijing University of Posts Telecommunications Beijing 100876 China institute of Electronic technology Information Engineering University Zhengzhou 450004 China Trusted computing Laboratory Beijing University of Technology Beijing 100022 China

Two multiparty simultaneous quantum identity authentication (MSQIA) protocols based on secret sharing are presented. All the users can be authenticated by a trusted third party (TTP) simultaneously. In the first protocol,the TTP shares a random key K with all the users using quantum secret sharing. The ith share acts as the authentication key of the ith user. When it is necessary to perform MSQIA,the TTP generates a random number R secretly and sends a sequence of single photons encoded with K and R to all the users. According to his share,each user performs the corresponding unitary operations on the single photon sequence sequentially. At last,the TTP can judge whether the impersonator exists. The sec-ond protocol is a modified version with a circular structure. The two protocols can be efficiently used for MSQIA in a network. They are feasible with current technol-ogy.

关键词： quantum identity authentication secret sharing quantum cryptography

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The Symmetric Banzhaf Value for Fuzzy Games with a Coalition Structure

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International Journal of Automation and computing 2012年第6期9卷 600-608页

作者： Fan-Yong Meng 1 Qiang zhang 2.1 School of Management,Qingdao Technological University,Qingdao 2.652.,china 2.School of Management and Economics,{2. institute of technology,{2. 100081,china 1. School of Management Qingdao Technological University Qingdao 266520 China 2. School of Management and Economics Beijing Institute of Technology Beijing 100081 China

In this paper,a generalized form of the symmetric Banzhaf value for cooperative fuzzy games with a coalition structure is *** axiomatic systems of the symmetric Banzhaf value are given by extending crisp ***,we study the symmetric Banzhaf values for two special kinds of fuzzy games,which are called fuzzy games with multilinear extension form and a coalition structure,and fuzzy games with Choquet integral form and a coalition structure,respectively.

关键词： Cooperative fuzzy game coalition structure symmetric Banzhaf value multilinear extension Choquet integral.

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The structural analysis of fuzzy measures

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Science china(Information Sciences) 2011年第1期54卷 38-50页

作者： zhang Ling1,zhang Bo2.& zhang YanPing1 1 Computer Science College,Anhui University,Hefei 2.003.,china 2.tate Key Lab of Intelligent technology & Systems Tsinghua National Lab for Information Science & technology Information Science & technology College,Computer Science & technology,Tsinghua University,beijing 100084,china 1. Computer Science College Anhui University Hefei 230039 China2. State Key Lab of Intelligent Technology & Systems Tsinghua National Lab for Information Science & technology Information Science & technology College Computer Science & Technology Tsinghua University Beijing 100084 China

From quotient space based granular computing theory we explore the fuzzy measures of fuzzy sets. Based on the structural analysis of fuzzy sets,we present an"isotropism"*** this assumption we achieved the following insights:(1)the uniqueness of a fuzzy measure being isotropic on a finite complete semi-ordered set;(2.the necessary and suffcient condition of the isomorphism for fuzzy measure functions in fuzzy mathematics;(3.the necessary and suffcient condition that fuzzy measures have fuzzy and granular monotonicity;(4)under a certain assumption,the analytic expression for fuzzy *** results clarify the relationship between fuzzy measures and granular computing,reveal the essence of fuzzy measures,and provide a simple way of constructing fuzzy measures.

关键词： quotient space fuzzy set fuzzy measure rough set structural analysis

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Subchronic toxicological effects of aquatic nitrobenzene on Medaka and Chinese rare minnow

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Science china Chemistry 2007年第5期50卷 707-717页

作者： ZHOU QunFang1, FU JianJie1,2. MENG HaiZhen1,2. ZHU XueYan1,2. JIANG GuiBin1, {3. JianBin1, LIU JieMin2.& SHI guoqing2.1 State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-environmental Sciences, Chinese {2. of Sciences, beijing 100085, china 2.Department of Chemistry, School of Applied Science, University of Science and technology beijing, beijing 100083. china State Key Laboratory of Environmental Chemistry and Ecotoxicology ResearchCenter for Eco-environmental SciencesChinese Academy of SciencesBeijing 100085China Department ofChemistry School of Applied ScienceUniversity of Science and Technology B

Based on the simulative exposure experiments of nitrobenzene to two small experimental fishes, Medaka (Oryzias latipes) and Chinese Rare Minnow (Gobiocypris rarus), it was found that nitrobenzene could decrease in a linear way in the static aquatic system. Both fishes could accumulate dose-related levels of nitrobenzene quickly and eliminate the compound rapidly when they were transferred to clean water. The Chinese rare minnow showed more sensitivity to the acute toxicity exposure of nitrobenzene than Medaka. Typical molecular biomarkers in oxidative defense system including superoxide dismu- tase (SOD), catalase (CAT) showed the chemical induced alterations. The changes of acetylcholi- nesterase (AChE) activities indicated that nitrobenzene might affect the normal neural function. Nitro- benzene exposure could also lead to obvious damaging effects on the target organs, such as gill and liver by hitopathological studies.

关键词： nitrobenzene, Medaka, Chinese rare minnow, bioaccumulation, elimination, molecular biomarkers, histopathological effects

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Parallel computing of Ocean General Circulation Model

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Wuhan University Journal of Natural Sciences 2001年第Z1期6卷 568-573页

作者： zhang Li lun 1, Song Jun qiang 1, Li Xiao mei 2.1. School of Computer Science, National University of Defense technology, Changsha 410073. {2. 2. Department of Computer, institute of Command technology, beijing 100081, {2. School of Computer Science National University of Defense Technology Changsha 410073 P.R. China

This paper discusses the parallel computing of the third generation Ocean General Circulation Model (OGCM) from the State Key Laboratory of Numerical Modeling for Atmospheric Science and Geophysical Fluid Dynamics(LASG),institute of Atmosphere Physics(IAP). Meanwhile, several optimization strategies for parallel computing of OGCM (POGCM) on Scalable Shared Memory Multiprocessor (S{3.P) are presented. Using Message Passing Interface (MPI), we obtain super linear speedup on SGI Origin {3.00 for parallel OGCM(POGCM) after optimization.

关键词： parallel computing OGCM optimization strategy S2.P

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Research on trusted computing and its development

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Science china(Information Sciences) 2010年第3期53卷 405-433页

作者： SHEN ChangXiang1, zhang HuanGuo1?, WANG HuaiMin3. WANG Ji3. ZHAO Bo2. YAN Fei2. YU FaJiang2. zhang LiQiang2.& XU MingDi2.{2. University of technology, {2. 10012., china 2.chool of Computer, Wuhan University, Key Laboratory of Aerospace Information Security and Trusted {13. of Ministry of Education, Wuhan 43.072. china 3.chool of Computer, National University of Defence technology, Changsha 43.074, china 1. beijing University of technology Beijing 100124 China3. School of Computer National University of Defence Technology Changsha 430074 China2. Key Laboratory of Aerospace Information Security and Trusted Computing of Ministry of Education School of Computer Wuhan University Wuhan 430072 China

Trusted computing is a novel technology of information system security. It has become a new tide in worldwide information security area and achieved inspiring accomplishment. In {2., the initiative research of trusted computing is not late, and the achievements are plentiful and substantial. Our country is in the front rank of the world in trusted computing. This paper comprehensively illustrates the recent development in theory and technology of trusted computing, introduces some improvements in trusted computing in our country, and proposes our opinions and viewpoints towards the existing problems in trusted computing and its future development.

关键词： information security trusted computing trusted computing platform trustworthy software trusted network connection

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