基于Qos编排下Web服务的相对权重组合研究

随着Web服务的发展,用户如何在高度复杂的网络环境下选择满足最大Qos(Quality of service)是研究的难点.提出了一种基于Qos编排下Web服务的可信研究,对目标Web服务之间可信度进行度量,初步确定在不同Qos要求下服务间的相对权重,然后通过权重关系选择一条服务路径.根据不同用户对不同Qos的要求形成不同的服务组合形式,构建了不同的服务相对权重.最终能够为不同用户推荐不同的服务组合,以达到比较好的Qos要求.     

一种支持QoS约束的Web服务发现模型

服务质量是Web服务发现中的关键问题.本文提出了一种支持QoS的Web服务发现模型,该模型增加了Qos代理中心机构,并引入监控和反馈机制.在满足用户对Web服务功能需求的基础上,它以服务注册参数、用户反馈信息和实时监测数据为依据结合QoS代理中心的监控器、量化器、选择器、管理器对Web服务的非功能性属性进行量化,实现服...     

基于Petri网的语义Web服务过程模型匹配算法研究

为了在服务发现中提高效率及准确率,在服务匹配过程中引入了服务执行状态的变迁等因素即服务的过程模型。而Petri网能够把Web服务的过程模型进行形式化描述．在服务发现中引入Petri网,通过Petri网描述web服务的过程模型,再对Petri网进行语义标注,最后通过计算过程模型的相似度来实现基于Petri网的语义Web服务发现匹配．这种方法结合现有采用功能性参数匹配的语义web服务发现对提高服务发现率,尤其对改善服务发现准确率起到了一定的作用．     

开放环境下Web服务组合研究述评

开放环境下用户的服务请求往往与现有web服务存在差异，要满足用户的服务请求，需要对现有Web服务重新进行组合。从Web服务组合的构件块、服务组合类型与服务组合的生命周期、服务组合模型、服务组合机制四个方面，对当前的Web服务组合技术进行介绍与分析。     

基于Web Service架构的MIS开发探讨

Web的商业需求很重要，一般来说web技术定义和技术规范以及现有的Web服务的研究和实践都比较多，可以进行Web Service的实际构建．本文主要对基于Web Service架构的MIS系统的开发方式方法进行了探讨．     

基于Web服务面向服务的动态电子商务应用框架研究

web服务是新一代电子商务和企业应用集成(EAJ)解决方案的核心和关键,而动态电子商务是电子商务发展的目标.Web Services 面向服务为动态电子商务业务流程提供了一致的信息交换与集成框架,从而支持着企业交易伙伴之间更为复杂的 Web 交互与商务协作.讨论了面向服务架构和web服务及相关协议规范,最后提出了基于web Service面向服务的电子商务应用框架.     

Web访问控制推理研究

Web服务的访问控制机制是实现综合信息系统多系统开放交互行为所面对的安全问题的关键问题,也是解决这样的大型整合开放系统建立的基础支撑技术.在完成这些跨域系统的开放交互的整合需要考虑到web服务访问控制所具有的处理跨域访问能力.现有的web服务访问控制主要存在着动态授权、跨域访问控制以及系统实现标准化等具有挑战性的问题上.在本课题中通过对web服务现存的挑战性问题进行分析的基础上研究提出了web服务访问控制的模型,它是将结构化属性表达能力融入到了现有的访问控制模型上,也将授权机制的关联策略关系修改为属性间的关联关系,使得授权的针对性更强也使访问的对象可以集中管理控制.通过实现具有逻辑推理机制的推理系统对web服务访问控制的授权进行访问裁决,实现跨域授权访问的智能可控性,通过引入逻辑推理授权机制使得web服务的控制访问系统设计及实现得以简化,为整合的访问开放web系统提供了统一的访问控制机制.     

基于 OWL-S的语义Web服务匹配算法

利用OWL-S web服务语义描述本体,引入领域本体,对Web服务进行语义描述、匹配.在传统的语义Web服务匹配算法的基础上进行改进,提高了Web服务匹配的查全率和查准率.     

基于Qos的语义Web服务发现研究

Web服务数目的剧增,为用户提供了更多的选择。但是,也为用户从众多服务中选择最佳服务带来了难度。本文在Web服务的语义化描述的基础上,结合Qos标准,提出一种新的Web服务发现模型,通过实例说明该模型能为用户提供最佳服务,且在一定程度上满足用户的个性化需求。     

Web服务寻址以及在WSE中的实现

SOAP协议规范了Web服务之间传递消息的规范格式,保证了服务间的消息交换不受底层传输协议的影响.但SOAP协议在设计时并没有规范Web服务之间的寻址问题,影响了Web服务的传输中立特性.WS-Addressing在web服务寻址上提供了传输中立的机制,通过WS-Addressing服务寻址与传输协议无关,Web服务访问不再局限于HTTP协议.WSE完全支持WS-Addressing,并降低了基于WS-Addressing的Web服务程序开发的过程.     

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.     

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.     

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     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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