基于EJB的电子商务系统设计

企业的信息化处理，尤其是基于Web技术的电子商务是今后企业生存与发展必不可少的基础，而Java＋XML结合起来用于电子商务（B2B）的模式，将成为B2B电子商务的驱动力。采用基于Java的EJB（Enterprise JavaBeans）技术开发了电子商务系统，并强计子系统的体系结构，定义了主要的EJB容器和相应的EJB，给出了Bean的功能描述和系统部署方案，并举例说明了系统的运行方式。     

EJB技术研究及应用

Enterprise JavaBeans(EJB)技术是一个服务器端的组件体系结构，它使得用Java编写企业级分布式组件应用系统更加容易．本文以昆明有线宽带网互动开放服务平台为研究背景，介绍了EJB技术的基本概念，分析了EJB组件模型的体系结构、技术特点及应用．     

一种基于EJB电子商务系统的设计

比较了EJB技术及相关关键技术的异同点.在此基础上,结合一个电子商务系统开发实例,分析了利用EJB技术能简化电子商务应用开发的优势.最后给出一个综合EJB技术开发的CRM电子商务系统层次结构设计模型.     

XML在EJB组件技术中的应用

简要介绍了可扩展的标记语言(Extensible Markup Language,XML)和基于Java的服务器端组件架构技术———EJB(Enterprise Java Bean,企业Bean)。总结了XML在EJB中三个比较典型的应用,并结合二者的特性分别给出了相关的论述。     

基于J2EE构建多层分布式电子商务系统

讨论了构建电子商务应用的多层分布式模式及EJB、JSP和Java servlet等关键技术，介绍了基于EJB组件的系统开发方法，并提出了构建多层分布式电子商务的主要步骤。这种基于J2EE的开发技术是解决电子商务系统构建的有效方法，通过它可以构建高效率的分布式电子商务系统。     

新一代EJB组件技术研究

Enterprise JavaBeans(EJB)是Java服务器端组件模型,采用EJB技术能有效地进行软件复用,提高软件开发效率。文章介绍了EJB的各个组成要素,分析了传统EJB在复杂性方面的突出问题,比较了传统EJB和新一代EJB在开发,部署和测试中的不同。最后,指出了新一代EJB在传统EJB复杂性方面作出的重大改进。     

EJB组件技术及其应用研究

Enterprise JavaBeans(EJB)是Java服务器端组件模型,采用EJB技术能有效地进行软件复用,提高软件开发效率.分析了EJB的体系结构,介绍了EJB的各个组成部分,比较了EJB的种类和各自的技术特点,讨论了EJB技术实现的原则,对分布式技术中目前较为成熟的COM/DCOM、CORBA和EJB技术进行了综合比较,最后通过一个例子详细阐述了开发EJB组件的过程,并给出了实现该技术的关键代码.     

基于分布式中间层电子商务系统的实现

EJB是JAVA分布式中间层技术实现的重要方法 ,通过EJB规范的分析 ,利用EJB技术设计并实现了一个典型的电子商务系统     

EJB3.0集成技术的研究与比较

为解决企业在实现业务集成过程中存在的集成方式单一,集成技术难度大等问题,根据EJB3.0的特点,探讨了EJB3.0(Enterprise JavaBeans)集成技术,给出了3种集成方式的集成模型和实现方法,在此基础上对各种集成方式进行了比较,论述了3种集成方式优势与不足以及各自适用的范围。通过对EJB3.0集成技术的研究与比较,为企业合理使用集成技术进行系统集成提供了解决方案。最后结合面向服务架构思想和EJB3.0集成技术,简要分析了EJB3.0集成与SOA(Services Oriented Architecture)的关系,为开发面向服务软件架构提供了参考性建议。     

J2EE构建教务管理信息系统

使用J2EE技术来实现教务管理系统主要有两个好处：高度的安全性以及多样化的选择。J2EE提供了对EJB（Enterprise Java Beans）,JavaServletsAPI、JSP（Java Servcr Pages）以及XML技术的全面支持。其最终目的就是成为一个能够使企业开发者大幅缩短投放市场时间的体系结构。J2EE构建的教务管理信息系统主要包括基本信息管理和统计分析两大功能分类。     

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.