The thesis is on the basis that a large amount of literature is read , through relevant theories we scientifically analysis the advantage or negative influence between how the cluster concentrate advantage affect the competitiveness form of the private enterprises that live in it and how enterprise behavior that concentrate theirs own competitiveness affect the cluster competition advantage coming into being . then we excogitate an interactive reward model in view of the above to analyze howthe cluster request the private enterprise behavior and explain why enterprise participate competitive advantage building together , at the same time with theinteractive reward model we also further explained how the ‘ ‘ immunity ” and “ strengthen by oneself ' ’ theorem of the cluster work . finally , through analysis theinteractive behavior between three shoes clusters and the enterprises in them of wenzhou and quanzhou and dongguan , we verify the relevant conclusion of the thesis we have concluded that the competitive advantage between the cluster and theenterprises is spiral and interactive 论文在大量文献阅读的基础上,借助相关理论对产业集群竞争优势对群内企业构建优势产生的正面和负面影响,及企业行为对集群优势形成产生的或正或负的影响做出了系统分析。并据此构建了二者相互作用的奖励模型,借助模型分析了集群对企业行为提出的要求,并进一步解释了企业参与优势共建的动因所在,同时解释了集群的“免疫”和“自增强”机制作用的机理。
In order to implement an electronic whiteboard system , the thesis introduces the theory of computer supported cooperative work ( cscw ) and discusses key knowledge of cscw , which includes cscw system structure , cluster cooperative work model , cooperative control scheme and key communication technology of clusters . the thesis gives an in - depth analysis of the theory and characterics of electronic whiteboard system , which is a typical application of cscw , and suggests a method of implementing the system using java 为了实现一个教学白板系统，论文首先对cscw进行了一些理论研究，包括对cscw的应用系统的体系结构的研究、对群体协作模式的研究、对协同控制机制的研究、对群组通信的关键技术的研究，并对cscw应用系统中的典型应用电子白板的原理和特点进行了分析，提出了使用java进行实现的方法。
At present , there are many research methods on pile groups subjected to lateral loads at home and abroad . however , it is still far from meeting the demands of pile groups appliances in engineering . using the finite element software ansys , the article calculates and analyses the behavior capacity of pile groups first 本文首先运用目前国内外应用较为广泛的有限元软件ansys对群桩基础进行有限元分析：分析了横向荷载作用下群桩的桩距、桩数、桩径、桩长、土体模量等因素对群桩效应的影响，得出了一些有益的结论。
Secondly , we described the fundamental concepts and properties of group signature scheme and some general digital signatures that can be used to construct group signature amply , and presented a group signature scheme based on the integer factorization . thirdly , we explained the fundamental concepts and properties of authorized group signature in detail and propounded a secure authorized group signature based upon the discrete logarithm . finally , we illuminated electronic payment system in e - commerce and designed a simple and high secure electronic cash system with multiple banks based on group signature 首先,对群签名体制的研究背景、意义以及发展现状进行了介绍;接着针对群签名体制的基本概念和性质以及可用于构造群签名的一些普通的数字签名体制进行了详细描述,并基于大整数分解问题给出一个群签名方案;同时还对授权群签名的基本概念和必须满足的基本性质进行了详细说明,并且基于离散对数问题给出一个安全的授权群签名方案;最后,对电子商务中的一个重要组成部分? ?电子支付系统进行了详细的阐述,利用群签名技术设计出一个简单、高安全性的多银行电子现金系统方案。
