Performance study on Gossip-based group key distribution protocal

1 .INTRODUCTIONIP multicast[1]communication is an efficient means ofdistributing datato a group of participants .Incontrastto unicast communication, multicast routing permits asingle IP datagramto be routedto multiple hosts si m-ultaneously. Membership in a multicast group is dy-namic ,so hosts canjoinandleavethe multicast sessionwithout the permissions or knowledge of other hosts .The inherent benefits of multicast routing may alsopresent some vulnerabilities making it susceptible toatt…     

Scheme of adaptive polarization filtering based on Kalman model

1.INTRODUCTIONIn modern high technology war,the electroniccounter measures(ECM)and precise guidance tech-nology are rapidly developed and becoming the re-search hotspot of militarysciencefor all the countries.The guidance missiles are the main weapons andhigher anti-jamming ability and guidance precision arerequired for guidance radar.For the active mono-pulse guidance radar,the angle information of thetarget is obtained by usingthe angle measured methodof amplitude sum/difference or pha…     

代数几何中的正定性Ⅱ向量丛和乘子理想的正定性

正定性是代数几何中的重要研究课题，本书系统地介绍了线丛、高阶向量丛、乘子理想的正定性的最新发展成果。全书共有三部分内容，分为两卷，本书为第二卷。第一卷含有第一部分内容，第二卷由第二部分和第三部分内容组成。     

非线性工作手册 第三版

非线性动力系的研究在近20年来发展迅速，有力地推动了科学技术的发展，其方法和技术被科研人员广泛使用。本书给出非线性动力系所使用的全部技术和方法，涉及20多个数学分支，包括一些前沿性成果。书中按学科分支详尽描述了数学背景，给出有关概念、定义、定理和算法，并配备一些范例。其中数值方法和符号方法通过C＋＋，Symbolic C＋＋及Java实现，还使用了一些专用技术，包含150多个操作程序。     

Improved spatio-SNR FGS video coding scheme using motion compensation on enhancement-layer

1.INTRODUCTIONWith the highly speed development in computer andnetwork technology in recent years,it becomes truefor peopletoenjoy video multi mediaservices onInter-net or wireless network by using PC or non-PC de-vices accessing network.Obviously,such servicespresent great challenge to traditional video codingscheme.Because of variety of user’s accessing net-work,available bandwidth acquired by user is vari-ous.Moreover,network instantaneous bandwidth isvarying all the ti me,whichis t…