基于双线性映射的匿名跨域认证方案

为保证跨域资源访问的安全性,提出一种基于双线性映射的匿名跨域认证协议,该协议可以避免传统基于公钥基础构架的跨域认证方案中证书传递的繁琐性,以及现有基于身份的跨域认证方案中权威机构冒充内部成员进行跨域访问资源的弊端,同时具有实体追踪能力,支持双向匿名实体认证.性能分析表明该方案具有较好匿名性和安全性.     

基于跨域Cookie的单点登录系统的设计与实现

分布式体系架构下,多站点协作的网络应用系统需要整合各自的身份认证和权限认证系统."单点登录"是身份认证系统整合解决方案之一,采用"单点登录"整合系统后,用户只需要登录一次就可以访问所有相互信任的应用系统.在分析现有单点登录服务实现的结构和原理基础上,提出了应用于WEB环境下,基于Cookie的单点登录解决方案.它是一种基于HTTP协议,以跨域Cookie共享为核心的身份认证系统.     

研究生信息平台中运维系统的设计与实现

现代软件系统大多采用基于日志收集与分析的运维模式,帮助系统管理人员确保业务系统的安全性与稳定性.本文首先讨论了现有基于日志分析的运维方案.接下来,基于开源的ELK框架,设计了华东师范大学研究生院信息平台中的运维子系统.通过实时交互可视化的数据分析方式,有效地解决了研究生院业务人员在系统使用中遇到的性能与负载监控,用户行为分析以及服务异常调试等方面的问题.最后针对不同类型的业务运维场景,给出了基于交互式仪表盘的运维服务实现.     

校园卡系统跨校区建设方案探讨

在多校区的大学中,针对各校区个性化应用和校园卡跨校区使用的需求,提出一种既能在校区独立部署又能实现校区间互联互通的校园卡系统跨校区建设方案,设计了数据交换平台以及基于该平台的跨校区认证流程、跨校区消费流程、以及相关的管理流程.本方案也可为独立部署的校园卡系统之间进行跨校建设方案设计提供参考.     

基于身份的两方跨域认证密钥协商协议

两方跨域认证密钥协商协议是指来自不同私钥生成中心的两个参与方完成互相认证和协商出相同的会话密钥。基于身份的密码体制能避免公钥基础结构的公钥证书存储问题。双线性对运算复杂度较高,计算成本较大。我们提出了一个新的无双线性对基于身份的两方跨域认证密钥协商协议,并在随机预言模式下证明了协议的安全性。     

高校农业科技创新与推广服务模式初探

高校在农业科技体系创新建设中具有重要作用。以高校为依托,已探索出多种有效的农业科技推广模式。清华大学的实践表明,高校现有的服务模式仍有待于进一步完善,亟需整合内部资源,制定长期服务规划,联合地方及企业,共同建设服务农村发展的跨校、跨区域的资源整合和共享平台。     

基于口令的跨服务器认证密钥交换协议研究

为了满足某些特殊通信服务在跨服务器认证密钥交换时必须由客户直接协商产生会话密钥的要求,该文提出一种新的基于口令的跨服务器认证密钥交换协议。该协议对在线字典攻击的反应灵敏度及发现此类攻击的计算代价和通信代价低;分析结果表明,新协议满足基于口令的认证密钥交换协议的安全性要求。     

一种面向SIP通信的域间认证与密钥协商机制

现有SIP安全机制在通信实体间的相互认证与密钥协商方面存在不足,针对此问题,设计了一种新的基于身份密码系统的域间密钥协商协议,然后基于该协议提出了一种面向SIP通信的认证与密钥协商机制.该机制解决了HTTP摘要认证下的单向认证以及预共享密钥问题,消除了S/MIME基于证书认证和不提供密钥协商的不足,且不同域的通信实体具有不同的系统参数.安全性分析及其实现表明,该机制在实现跨域SIP通信实体间的双向认证以及为后续媒体流机密传输提供密钥协商功能的同时可以满足SIP通信的性能要求.     

基于测评理论的线路运维作业方式优化研究

针对目前我国电力企业输电线路运维作业中人员配置不合理、运维效率低下等问题,提出一种优化的基于测评理论的线路运维作业方式.该方式采用统计学中的测评矩阵理论、机会成本理论和人力资源优化配置理论,并结合某电力公司现有运维作业方式,构建了一种基于测评矩阵的输电线路运维作业优化模型.该电力公司线路运维作业验证实例表明:模型合理有...     

基于接入控制器模式的公共无线局域网安全体系设计

公共无线局域网面临网络安全、用户数据保护、身份认证、移动管理及网络服务等多方面的挑战。将现有的公共无线局域网分为WISP-owned, Operator-owned以及for Enterprise 3种类型,并分别讨论了各种类型的特征及其架构。在此基础上提出一种基于接入控制器模式的通用安全体系,可应用与目前大多数类型的公共无线局域网。提出了一种802.1X和WEB认证的混合型认证协议,该协议在进行WEB认证时将利用802.1X协商后产生的密钥进行,可有效的抵抗窃取服务、基站伪装、消息窃听等攻击,并与现有公共无线局域网Web认证相兼容。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that