基于XML的B2B电子商务安全研究

分析B2B电子商务的重要性及其安全通信的需求,遵照W3C发布的XML加密规范标准及信息交换的标准格式,通过.NET开发平台,实现对XML元素或元素内容进行加密、签名,从而实现基于XML的B2B电子商务的安全数据交换.     

XML信息的加密及实现

简述了XML在跨平台分布式中的应用（数据交换），分析了XML加密的必要性和特点，详细阐述了XML加密信息的原理和类型，最后探讨了XML加密技术在Visual Studi．NET2005下的实现。     

基于XML安全的加密数据库中的数据交换

随着Intemet技术的迅速发展，数据库中敏感数据的安全性问题也随之引起人们的重视．该文基于XML加密的思想，给出了一套传递加密数据库中的密文及其相关解密信息的标记，并且设计了加密数据库和XML文档之间的映射规则，最后给出了一个基于XML的加密数据库的数据交换模型。     

基于XML的物流数据交换技术

目的为满足物流配送系统异地分布式物流数据交换的需求,提出利用以XML文件作为物流数据交换平台的方法。方法利用JDOM组件实现了XML文件的生成与解析,遵循W3C规定的XML加密规范说明物流数据XML文件的加密原理。结果利用Lempel-Ziv和Huffman编码实现了XML文件的充分压缩。结论这种支持物流数据交换的解决方法,可实现网络环境下物流数据的有效交换与共享。     

利用XML安全包实现数字图书馆通信安全

分析了XML安全的重要性,介绍了如何利用XML安全包实现XML文档的数字签名、文档规范化和元素级加密。     

基于XML的移动电子商务数据加密技术的研究

针对移动电子商务的特点,依托XML语言强大的数据处理能力,提出了一种基于XML的移动电子商务数据平台上实现数据加密的技术,即采用改进的对称RC4加密算法和非对称ECC加密算法对移动平台的数据进行加密,该技术使得移动终端之间或者移动终端与数据服务器之间能够更好、更安全的进行交互.整个过程始终采用XML作为数据交换的中介,...     

XML加密技术的研究与实现

讨论了XML加密技术及其应用，并结合实例说明各种类型的加密方法的实现：整个文档的加密、元素的加密、元素内容的加密及非XML数据的加密。     

基于XML的多方数据通信安全模型研究

本文针对XML签名规范的不足之处，提出了基于XML的多方通信安全模型，保证XML数据的确认性、完整性和不可否认性，解决基于XML通信技术的业务链中多方通信数据安全问题，从应用层的角度提供了多方通信时的身份认证和XML数据完整性．同时该模型还具有整体签名、部分验证的特点。     

浅析XML安全技术

文章从XML安全技术目前备受关注的原因出发,分析了基于XML安全解决方案的优点,描述了XML加密和XML签名设计方案以及XML数字签名标准和XML加密标准的基本组件,并对该技术进行了总结和展望。     

XML数据交换技术在数字化校园中的应用研究

数据交换是数字化校园建设方案的核心技术,作为数据表示和交换的标准,XML解决了数据格式不一致的难题和异质系统之间的通信,使不同系统/平台的数据交换变得非常容易.以研究生院的招生管理系统为例,论述数字化校园建设中基于XML的数据交换的技术设计和实现.     

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