MVC设计模式在Java程序开发中的应用

MVC框架结构是一种有效的开发模式,可以有效地分离数据表现和数据访问。通过概括MVC特点,介绍了基于Ja-va的MVC实现方法,实现了自定义的一种MVC框架结构。     

J2EE多层体系结构改进研究

传统的MVC模式在表示层和业务逻辑层存在大量的数据交换,降低了系统的效率,讨论了在软件开发过程中具体存在的问题,分析了Session Faade和Business Delegate两种设计模式的特点,提出将这2种模式和MVC模式结合,形成完善的J2EE开发模式.同时,对J2EE架构中的数据持久层进行分析和改进,提出用DAO类和DAOFactory类实现数据持久层的方法,形成更完善的J2EE体系结构.     

基于JSP的MVC模式研究与应用

目的研究MVC(Model-View-Controller)开发模式,应用MVC模式实现文件上传功能。方法研究MVC模式,使用MVC模式进行JSP系统的开发。结果完整实现了文件上传的功能。结论MVC模式提高了开发的效率,弥补了传统开发模式的不足。     

基于MVC模式的多界面集成的研究及在厦门市就业管理信息系统中的应用

首先介绍了本课题的背景以及MVC模式、J2EE中的MVC模式、XML及SOAP交换协议等相关技术概念,然后结合厦门市就业管理的实际业务和信息系统的应用特点分析了多界面需求,在此基础上确定了采用三层C/S和三层B/S结构相结合的厦门市就业管理信息系统的软件体系结构,提出了基于MVC模式的多界面集成解决方案,并对方案中的关键问题如系统架构中的层次调用关系、层次调用规则等进行了探讨.将视图、控制器、模型有效的分离,通过统一的中间层应用服务器和后台数据库服务器,利用WEB容器中Servlet控制组件中的请求处理器、数据格式转化器、服务定位器和EJB容器中的EJB组件,采用集中的控制组件,实现视图与模型的数据交换,最终实现多界面集成的应用.最后给出基于MVC模式的多界面集成的详细设计方法,提出了基于MVC的多界面集成的总体结构,并重点对客户端数据传输组件和服务器端控制组件进行了详细的设计,介绍了实现的方法,同时展现了系统的实现效果.     

MVC模式在Java Web开发中的应用及实现

MVC设计模式是一种可靠有效的开发模式,它实现了业务逻辑和显示界面的分离,在Web应用开发中广泛地使用,该文简要介绍了MVC设计模式,讨论了MVC模式在Java Web应用中的实现,最后给出了一个基于MVC模式的Java Web登录程序的实例。     

基于MVC的通用型模式的设计与实现

针对单机、C/S和B/S这3种主流结构在MVC模式层次结构上的异同点,提出了对3层MVC模式的表现层进行拓展,加入Model,构建通用型MVC模式的设计方法,解决了在系统开发中这3种结构间转换的难题,提高了系统的可扩展性、可维护性和可复用性,并以大学物理仿真实验为例实现了通用型MVC模式的设计.     

矿床仿真系统中数据的动态配置管理

针对以往的矿床仿真系统存在的通用性差、实用性差、硬编码开发、可扩展性差等问题，基于MVC设计模式，采用XML技术生成配置文档，来描述数据的组织结构、应用程序的运行参数和框架，作为MVC模式中的控制部件，供应用程序在运行中动态调用，实现了对数据的动态配置管理，从而解决了以往系统的常见问题。     

MVC＋DAO模式在J2EEWEB开发中的应用

本文通过运用JSP、Servlet、JavaBean、JDBC相关技术,利用MVC框架结合数据访问对象(DAO),提出了一种运用MVC DAO模式开发基于J2EE架构的WEB应用的解决方案。最后结合一个简单的例子对这种设计模式进行了实现。     

XML在基于B/S架构的房地产管理信息系统中的应用

对传统房地产管理信息系统的现状进行了研究,分析了其不足之处,结合XML技术的优势,提出了一种基于XML的系统架构模型,介绍了XML技术在基于B/S架构的房地产管理信息系统中的应用,并通过查看合同信息实例详细描述了在MVC模式下利用XML实现数据在Web浏览器中的动态发布的原理和方法。     

基于MVC模式的选课系统开发

本文结合一所高职院校的实际情况,对选课系统进行需求分析、设计和实现.论文对MVC设计模式在.NET平台上的实现方法进行了积极的实验与探索.论文通过对网上选课系统的设计实现,完善了MVC开发模式.     

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.