一个基于Web的工作流系统互操作的模型

针对在XML过程定义语言基础上解决跨流程互操作和分布式引擎互操作两种情况，通过采用工作流管理系统参考模型接口4的WAPI、Wf-XML、MIME、XML解析器以及数据转换中间件（DTM）等技术与实现方法，设计了一个基于Web的工作流互操作的模型．     

移动Agent在分布式工作流管理系统中的应用

分布式网络环境的异构性阻碍了工作流管理系统中任务进程间的协调与互操作，为有效实现了工作流在分布计算环境中的协同工作，本文在分析分布式工作流管理系统特点及CORBA，Agent技术的基础上，提出一种基于CORBA通信平台、多Agent协同工作的工作管理系统，主要涉及分布工作流系统的执行结构，CORBA服务框架，多Agent协作系统组成与通信、以及移动Agent的运行和通信机制，通过移动Agent在CORBA中的引入增加了系统智能性，自主性，从而便于协同处理开放分布式环境下工作流应用开发，优化企业资源和推进业务流程重组。     

基于多Agent的分布式测量系统的研究

文章提出了一种在CORBA环境下,基于多Agent技术的分布式测量系统结构,该系统不仅具有单独完成测量任务的能力,而且还能够与其他测量系统协作来完成大型复杂的测量任务;测量系统首先按其功能划分为6个不同的Agent,然后利用KQML作为通信语言、CORBA作为通信机制来执行多Agents之间的交流和协作,具有互操作、合作性、智能性及开放性等特点。     

基于模型驱动的产品数据管理体系结构研究

利用模型驱动架构(MDA)技术解决产品数据管理(PDM)与企业应用系统的互操作问题.分析了传统PDM系统体系结构的不足之处,依据MDA的思想,构建了PDM系统6层分布式体系结构.论述了PDM体系结构中的关键技术,并提出了采用MDA的PDM开发过程.在此基础上,自主开发了BITPDM原型系统.系统采用了XML描述软件间共享数据,通过Web服务技术实现动态集成.以此验证了MDA解决软件集成、系统互操作性、可移植性等问题的有效性.     

支持虚拟组织的层次式知识共享框架技术

虚拟组织中协同工作的首要条件是虚拟组织的知识管理和共享.结合了语义网技术,提出了一种基于语义的层次式知识共享框架.该框架使得虚拟组织成员能够共享异构知识、产生创新知识,实现互操作,为组织协同工作奠定基础.同时,其层次结构使得框架具有可扩展和灵活性,从而满足虚拟组织的动态变化需求.     

基于协作Agent的分布式入侵检测系统

借鉴智能代理Agent技术,并结合XML技术,提出了一种具有两层代理结构的分布式入侵检测系统DIDS模型．该模型由多个域组成,每个域中有多个检测Agent和协作Agent,检测Agent分布在各受保护主机上执行检测任务,检测结果向上层协作Agent汇报;协作Agent则综合本域中各检测Agent的信息进行分析,产生本地报警,并通过XML向其他域中协作Agent报警．协作处理与均衡负载能力是该系统的主要特点．     

基于XML的试题开发系统的设计与实现

基于国家信息技术教育测试互操作标准CELTS.10,从XML技术应用及标准化试题生成系统架构的建立两个方向,详细论述了试题开发系统的研制方法、主要内容和关键技术的实现;并在国家测试标准CELTS.10和WEBSERVICE技术的基础上提出了一种通用的试题开发系统架构,成功的解决了试题资源缺乏统一格式,在各异的体系结构中学习对象重用困难,系统互操作困难的问题。     

XML和组件技术在异构系统集成中的应用研究

本文以XML和组件技术在异构系统集成中的应用为研究对象,探讨了异构网络环境下分布式对象互操作存在的问题,分析了基于xML的异构系统集成框架体系结构,研究了基于XML和组件的异构系统集成的关键技术,相信对从事相关工作的同行有着重要的参考价值和借整意义.     

基于Agent技术的多层分布式GIS研究

对实现分布式GIS所存在的问题进行研究，分析和应用了多层体系结构和Agent技术各自的优点，提出了基于Agent技术的多层分布式GIS体系结构，并通过编程所进行的原型实验证明基于Agent技术的多层分布式GIS体系结构在实现分布式GIS时的可行性，从而解决了传统GIS体系结构无法解决的互操作性、资源(包括功能和数据)的迁移、资源的分散管理和集中管理、多服务站点协同工作等问题。     

基于J2EE的邮政物流系统的设计与实现

针对目前邮政物流存在的问题,结合某省邮政总局物流管理的特点,提出了适用于邮政物流管理的四级体系结构概念,并在J2EE技术的基础上,采用分布式组件技术,实现了一个多层的应用软件系统,解决了邮政物流信息的共享,加强了邮局各部门的协同工作效率。而且,该系统具有良好的扩展、维护性和部署能力,大大降低了软件系统的运行成本。     

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.     

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.     

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.     

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.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

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.