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.     

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.     

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.     

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.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

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.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

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。     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.     

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.