基于COM+的分布式WEB应用系统研究

本文在总结COM 及分布式信息管理系统的基础上,对当前流行的分布式对象技术CORBA、COM 、OM/DCOM和MTS的系统结构、工作原理和技术特点等作了深入的探讨;并在对Microsoft公司推出的用来建立三层式分布应用程序的Windows DNA的体系结构剖析的前提下,结合Windows DNA的三层式应用程序开发特点,利用COM 提供的服务,创造性的提出了一种新的在分布式计算环境下开发基于WEB的应用程序的解决方案--基于COM 的分布式WEB应用系统,并以一个学籍管理系统为例,详细论述了系统开发的方法和过程,给高性能系统的设计提供了一条新的思路.     

三层体系结构对象请求技术的设计与实现

探讨了基于三层体系结构对象请求技术的设计思想,以及建立基于组件的三层体系结构应用的相关技术,其中包括:COM(ComponentObjectsModel)、CORBA;ASP(ActiveServerPage)等,并详细描述了多层体系结构对象请求技术的具体实现方法,以及如何将其扩展到基于WEB的MIS开发中去.     

基于COM+的CRM应用系统开发

文章概要介绍了COM 组件及技术,研究了COM 在组件软件中的应用,并探讨了基于COM 的多层软件的设计和实现方法,有效地解决了传统工程软件存在的问题,重点处理了COM 的动态负载平衡。该CRM系统是基于微软的COM 体系结构和ADO,采用Delphi7IDE开发,使用了Windows 2000 Server操作系统和SQL Server 2000数据库服务器,在系统分析阶段充分利用了Power Designer 11.0可视化设计工具,从而设计出了有一定扩展性和可靠性的系统架构。     

基于COM/DCOM的分布式计算研究与应用

分布式计算技术在软件开发中得到了广泛的应用,它使复杂的大型网络应用程序变得易于开发。基于组件对象模型COM(Component Object Model)和分布式组件对象模型DCOM(Distributed COM)的组件技术是微软的分布式对象技术。通过详细地分析基于OM/DCOM组件技术的分布式计算的基本原理,总结了开发COM/DCOM组件的基本方法和三层分布式应用程序的实现过程。最后,给出了一个用COM组件构造的三层分布式应用系统实例。     

利用Delphi开发基于COM＋的多层分布式应用

介绍了Windows 2000 DNA的体系结构．讨论了COM 的系统架构、服务和多层分布式系统结构模型。以学生管理系统为应用实例．提出了利用Delphi开发COM 多层分布式应用的方法。阐述了系统中应用服务器、后台数据模块及客户端的开发实现过程。实际运行结果表明了该方法的实用性。     

利用Delphi开发基于COM+的多层分布式应用

介绍了Windows 2000 DNA的体系结构,讨论了COM 的系统架构、服务和多层分布式系统结构模型.以学生管理系统为应用实例,提出了利用Delphi开发COM 多层分布式应用的方法.阐述了系统中应用服务器、后台数据模块及客户端的开发实现过程.实际运行结果表明了该方法的实用性.     

基于COM+/DCOM的三层体系结构

随着计算机技术和网络技术的飞速发展，软件体系结构已逐渐从传统的C／S结构向三层体系结构发展．详细介绍了三层体系结构技术的原理、功能和特点；在COM 原理分析的基础上，对Windows DNA进行分析，提出了基于COM的三层结构的实现。     

基于现场总线的开放式数控系统体系结构研究

结合现场总线的特点和开放式系统的要求，提出了一种基于现场总线的开放式CNC系统的体系结构，并把该体系划分为应用层，功能层和设备层三个层次，对每一层的功能进行了系统的分析和描述。在实现方法上，采用COM／DCOM技术的OPC规范的软件方法，实现了数控系统的软件 模块的重用与扩充；采用Profibus现场总线实现了数控系统的硬件模块的互操作与互换，从而满足了数控系统开放性的要求。     

基于数据融合技术的测井解释系统的设计

基于数据融合技术的测井解释系统是为实现组合数测井中对多源信息的综合分析处理而开发的.阐述了基于数据融合技术的测井解释系统的设计与实现.该系统应用了先进的COM/DCOM、Web、公文包等技术,设计了一种基于分布式的多层体系结构.对系统实现中的几个关键技术进行了阐述.     

浅析分布式联网火车售票系统

相信大家对于数据库、分布式系统、COM、三层体系这些名词一定不会陌生,本文通过对分布式售票系统的需求分析、系统设计,以及如何在Windows2000下COM三层系统的配置,具体讨论了如何在VB中用COM组件实现分布式的三层系统:数据库服务器(SQL Server 2000)、应用层服务器(COM+)、客户端。     

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.     

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.     

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.