网络图中非关键工作的经济技术分析

由于在网络图中的非关键工作都有时差，所以这些工作在开工时问上都有一定的弹性，利用好非关键工作的弹性范围在某种程度上是进行网络图优化的关键，合理的网络优化可以带来良好的经济效益。本文主要从工期固定，成本最低，资源消耗最少的角度去研究如何进行比较经济的施工。     

工程性非自愿性移民与中国法律传统

传统中国农业文明的特点,导致古代中国工程性非自愿移民法律制度有着强烈的行政性,而“集团本位”的传统道德和立法思想更强化了移民的牺牲精神。在西方法学概念和逻辑基础之上建立起来的当代中国法律制度,工程性非自愿移民制度的运作仍然是“纯中国传统式”的。     

科学元勘的第三波及其争论述评

本文评述了关于公众参与科技决策的一场学术争论。柯林斯等认为，科学知识社会学对公众参与科技决策的支持过于宽泛，导致了“对技术决策的参与应该扩展多远？”这样的疑问。他们提出，科学元勘应当面向决策实践，放弃单纯描述性的工作和消极解构，转向考察专识的认识论特征，及其内容、结构、类别和功能，以重新理解决策中专家和外行的划界，为筛选适当的专家和公众参与决策提供依据。批评者认为。这个理论框架误读和抛弃了科学知识社会学的基本结论，是科学主义的和还原论的，是向传统的专家治理结构的倒退。他们站在社会建构论和认识论多元主义的立场上，分别从对决策问题、专家和专识的社会建构、对合法性问题的理解等方面提出了激烈的批评。     

New Public Key Cryptosystems from Combinatorial Group Theory

0 IntroductionThe security of most commonly used cryptographicschemesis essentially based onthree families of compu-tational problems :the integer factoring problem(RSAprob-lem) ,the Diffie-Hell man problemand the discrete logarithmproblem,andthe elliptic curve variants thereof .Inthe middleof 1990s , Shor[1], Bonehet al[2]presented some remarkablequantumalgorithms which can solveinteger factoring problemand discrete logarithmproblemover any group including Ga-lois fields and elliptic curve…     

Dynamically Reconfigurable Encryption System of the AES

Reconfigurable computing has grown to become an important and large field of research, it offers advantages over traditional hardware and software implementations of computational algorithms. The Advanced Encryption Standard （AES） algorithm is widely applied in government department and commerce. This paper analyzed the AES algorithms with different cipher keys, adopted a novel key scheduler that generated the round key real-time, proposed a dynamically reconfigurable encryption system which supported the AES algorithm with different cipher keys, and designed the architecture of the reconfigurable system. The dynamically reconfigurable AES system had been realized on FPGA. The result proves that the reconfigurable AES system is flexible, lower cost and high security level.     

The Mechanism about Key and Credential on Trusted Computing Platform and the Application Study

0 IntroductionPeople need a secure and dependable computing environ-ment[1]. The cryptology is known as the core of com-puter security[2]. The application of cryptologyis mainly ful-filled by key management and credential mechanism.In thispaper , we should study the key management and credentialmechanismbased ontrusted computing platform,and give theactual application of these security mechanisms for buildingtrusted computing environment .1 OverviewTrusted Computing1 .1 The Original of Trus…     

Password-Based Group Key Agreement Protocol for Client-Server Application

0 IntroductionWith the rapid advances of computer networks , moreand more users are connecting together to exchangelarge amounts of information and share useful resources .However ,the security issue is still a major gating factor fortheir full adoption; mainly due to many malicious adversariesresidingin networked environments will eavesdrop,interceptand modify the transmittedinformation.The client-server model , over past years , has enjoyedsignificant and continually increasing popularity in…     

Improved Authenticated Multi-Key Agreement Protocol

Zhou et al give an attack on Ham＇s modified authenticated multi-key agreement protocol, and give a protocol that can prevent the unknown key-share attack. The paper points out that the protocol is vulnerable to a concatenation attack. This paper proposes an improved authenticated multi-key agreement protocol which shows how to make Harn＇s protocol more secure by modifying the signature and verification. And this protocol can escape the concatenation attack.     

物流公共实时基础数据平台设计

物流公共实时基础数据平台已成为物流业发展的迫切需要。在分析平台建设可行性的基础上，对物流公 共实时基础数据平台的方案进行了设计，包括平台的目标、作用、基本功能、数据种类、系统结构和关键子系统，以 满足现有物流活动参与各方对信息共享的需求。     

公共事业民营化过程中的公益性与经济性分析——以公共交通为例

介绍了我国公共交通民营化现状,运用博弈论分析了公共交通民营化过程中存在的问题,并提出了相应的建议。