基于SH的动态级联菜单的应用

为了解决Web应用中动态级联菜单问题,采用Struts框架技术和Hibernate数据持久化技术,以Tomcat为Web服务器、以SQLServer2000为数据库实现MVC模式,提出一种全新的动态级联菜单解决方案。结果表明:在实现动态级联菜单过程中,Struts技术为Web设计提供了安全、高效的MVC框架;所有的数据请求及数据转发由Struts的核心ActionServlet承担,简化业务流程;Hibernate技术为数据持久化提供了可靠、高效的方式,使Struts可以轻易地通过Java对象访问、操纵数据库。该方法对Web设计具有一定的参考价值和指导意义。     

基于Web应用的教务考评系统的设计与实现

对"教务考评系统"做了详尽的需求分析、系统分析和模块化设计.对系统采用的Java/JSP技术及Struts和Hibernate架构做了简要介绍.Struts架构来实现了MVC模式、Hibernate解决了数据持久化问题.说明利用Struts架构与Hibernate构建基于Web应用是一种高效的方法.给出了Web环境下、基于这些先进技术的"教务考评系统"的设计与实现.系统具有架构合理、技术先进、安全性高、易维护等特点.     

Struts和Hibernate框架在OA中的应用

Struts框架是Web应用开发中最为流行的框架之一。它很好地实现了MVC设计模式的思想,但却存在着持久层开发的问题。文中介绍了一种O/R Mapping工具Hibernate,它简化了通常的数据持久化编程任务,并给出使用Struts和Hibernate两个框架进行整合开发的实例。     

基于B/S模式试题库管理系统的设计

为了解决教考分离的问题,基于Struts框架技术和Hibernate数据持久化技术,以Linux下Tomcat为Web服务器、以Oracle为数据库实现MVC模式,构建了试题库管理系统,实现了试题库建立,试题录入、查询和管理,自动组题,试卷的生成、预览和管理等功能。该系统的技术实现使其具备良好的开放性、安全性、稳定性以及通用性,目前已经投入使用并且运行良好。     

基于SSH的本科教学评估辅助系统的设计与实现

根据高校本科教学评估的需求,基于MVC三层架构模式,分离了表示层、业务逻辑层和数据持久化层,整合Struts、Spring和Hibernate开源框架,设计与实现了本科教学评估辅助系统。     

基于Struts＋Hibernate框架的Web应用开发

传统的Web应用程序的开发方法不能够满足当今的软件的发展需求,然而把Struts框架和Hibernate框架整合起来,可以使两者得到互补,有助于快速开发Web应用程序。介绍了MVC模式的原理,并分析了Struts框架和Hibernate技术的功能及优势,并以镇江市政府启动的新农村致福网系统为例,用Struts构建整体框架,Hibernate技术实现持久层,并详细阐述了基于Struts＋Hibernate框架开发的新农村致福网的构建。这两种架构相结合很好地解决了系统的开发效率低、不易于维护、低耦合及可移植性差等问题。     

基于Struts框架的客户关系管理系统的设计与实现

本文在对Struts框架进行深入的研究基础上,提出了客户关系管理系统设计的解决方案,完成了客户管理系统的结构化分析、结构化设计、以及数据库的设计。系统采用了Hibernate实现类的持久化。     

构建高效MVC模式的Java Web应用

模型-视图-控制器(Model-View-Controller,MVC)模式是一个非常经典的设计模式,如何将其有效地运用到Web开发之中值得研究.在此,阐述了传统MVC模式到Web分层MVC模式的变迁过程,分析了几种Web分层MVC模式的实现技术,指明了一种构建高效Web MVC模式的方法,最后举例说明使用Struts/Hibernate框架构建高效MVC模式的步骤.     

基于Struts和Hibernate框架的Web应用研究与实现

良好的体系结构和开发框架对一个Web应用的设计、开发、扩展、维护具有重要的意义,可以很好地提高代码的复用性,满足系统的"高内聚低耦合"原则。Struts是一种基于MVC的Web框架,实现了表示层和业务逻辑层的分离,提高了系统的开发维护效率;Hibernate是一种开源的持久层框架,保证系统具有更好的移植性,降低了数据库设计的复杂度。     

以Struts框架构建Web系统的安全性设计

Struts是基于Servlet,Jsp以及标签库技术的一个实现良好的MVC框架,可以更快的利用MVC理论进行Web系统的设计和开发,对于任何一个完善的Web系统来说,安全性设计都是一项重要的内容,文章介绍了Struts框架,以及在该框架下实现的Web系统中,如何实现安全性设计.     

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.     

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.     

A computer generator for randomly layered structures

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

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.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the