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.     

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.     

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。     

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.     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with