用Delphi编写高效的客户／服务器应用系统

本文通过剖析Delphi对后台数据库访问的原理及其实现过程,结合作者长期开发的经验,提出了四种提高客户／服务器应用系统执行效率的方法。     

C++ Builder与Oracle数据库的高级通信技术

本文主要介绍了C Builder与Oracle数据库之间的连接和通信技术，并探讨了提高系统性能的几种方法。     

Oracle数据库与C++Builder的连接方法

讨论了Oracle数据库和客户端开发工具C Builder的连接方法.利用Net8建立了服务器端和客户端的连接.通过SQLLinks专用接口和ODBC通用接口两种方法配置数据库别名.实现了Oracle数据库和客户端开发工具C Builder的连接.     

Interpolymer radical coupling: A toolbox complementary to controlled radical polymerization

The current review focuses on the relevance and practical benefit of interpolymer radical coupling methods. The latter are developing rapidly and constitute a perfectly complementary macromolecular engineering toolbox to the controlled radical polymerization techniques (CRP). Indeed, all structures formed by CRP are likely to be prone to radical coupling reactions, which multiply the available synthetic possibilities. Basically, the coupling systems can be divided in two main categories. The first one, including the atom transfer radical coupling (ATRC), silane radical atom abstraction (SRAA) and cobalt-mediated radical coupling (CMRC), relies on the recombination of macroradicals produced from a dormant species. The second one, including atom transfer nitroxide radical coupling (ATNRC), single electron transfer nitroxide radical coupling (SETNRC), enhanced spin capturing polymerization (ESCP) and nitrone/nitroso mediated radical coupling (NMRC), makes use of a radical scavenger in order to promote the conjugation of the polymer chains. More than a compilation of macromolecular engineering achievements, the present review additionally aims to emphasize the particularities, synthetic potential and present limitations of each system.     

数据库应用系统的发布与加密技术

开发完一个数据库应用系统后,如何将其发布并形成产品,并对自己的产品进行相应的保护,是开发人员必须面临的问题。文中详细介绍了如何用InstallShield Professional Version 6发布由Delphi开发的基于BDE方式的数据库应用程序,并对其进行口令保护和使用加密狗进行加密,通过加密狗提供的外壳工具和调用API函数达到高度加密效果。在Windows2000和Windows XP下通过验证,并且在实际应用中取得了较好的效果。     

用Delphi 5开发高效率的分布式应用系统——提高分布式应用系统效率的几种方法

本文总结出用Delphi5开发多层分布式应用系统时，通过优化数据库存取的设定，使用有效率的远程调用方式，调整应用程序服务器的执行效率和控制网络流量等来提高分布式应用系统效率的方法。     

dbExpress--Borland新的数据库接口技术

dbExpress是Borland新的跨平台的数据库访问接口，用来访问面向SQL的数据库管理系统。本文比较了该数据访问接口和现在了标准之间的不同，并简单介绍了该接口的抽象层结构和设计其驱动程序的基本知识。     

Liquid-phase theoretical antioxidant activity trend of some cinnamic acid antioxidants

The trend in antioxidant activity of four cinnamic acid antioxidants, derived on the basis of their liquid-phase phenolic O H bond dissociation enthalpies, is determined theoretically, with the aid of the polarizable continuum model at the density functional theory level. Three solvents, differing in their hydrogen-bonding ability and polarity—n-heptane, acetonitrile, and ethanol—were used to model different environmental situations. The trends in solution-phase antioxidant activity appeared different in each solvent; still, the theoretical antioxidant activity trend derived in n-heptane was in excellent agreement with the experimental one in the lipid systems and the gas-phase system. Different ortho substituents show notably different solvent effects. These results could lead to the determination of reliable antioxidant activity trends in real-solution environments of interest in food or biological science frameworks.     

在Delphi中实现异构数据库转换

讨论了不同数据库系统之间数据相互转换的方法,着重阐述了在Delphi中使用数据控制控件来进行数据自动转换的方法.     

基于Delhpi平台的数据库程序设计研究

数据库技术是当今信息社会的重要基础技术之一,在众多的数据库开发工具当中,Delphi尤为突出,它适应于多种数据库结构,具有高效率的数据库管理系统和最新的数据分析手段并且提供大量的企业组件。介绍了基于Delphi平台的数据库程序设计的原理,各组件功能应用以及数据库的连接方法,通过测试程序对比了各个数据库连接方法的访问时间,得出DBExpress方法优于BDE及ADO,大大提高了Delphi程序设计中数据库存取和访问的效率,总结了Delphi数据库开发的步骤,便于使用者学习和应用。