本文根据电子商务的基本原理，讨论企业电子商务的成本/效益构成及其相应的分析方法，使企业在开展电子商务时能够尽快地得到回报。

知识管理与电子商务是网络时代的两个重要的研究领域，本文从电子商务企业的信息系统建设、业务流程重组以及客户关系管理三个方面，分析电子商务中知识管理的应用以及存在的问题。

MPEG-7标准是国际标准化组织MPEG小组制定的对多媒体内容进行描述的标准，本文简要介绍了MPEG-7标准的内容和MPEG-7多媒体描述方案。并在此基础上描述了一幅图像以展示MPEG-7描述方案的使用。

Government procurement, known as the "Under Sunshine" system in China, has saved millions of US dollars of government expenditure. China will gradually expand the scope and scale of government purchase after the country's first Government Procurement Law took effect on January 1, 2003. Compared to the developed countries, the technology applied in government procurement is obsolete. Government electronic procurement auctions are irregular, and the government electronic procurement auction systems are not completely implemented. In this paper, we analyze the current situation of government procurement in China, and support that establishing government procurement electronic auction system is the best way to solve problems such as unfairness, collusion, inequality and inefficiency. Then, we give a detailed discussion about the framework of government procurement electronic auction system and the features of each subsystems and modules. Finally an actual application of this system is given, and an auction algorithm is also developed. We also provide directions for further studies about government procurement and the application of electronic commerce in this field.

数字化信息资源是我国信息化建设的一个重要内容，它的市场运作涉及到多个领域的研究，本文首先叙述了目前我国数字化信息资源的几种主要形式，并进一步讨论数字化资源的市场运作模式及其存在的问题，在此基础上，从信息资源提供商、信息资源需求方、政府机构以及数字化信息资源的组织体系等四个方面详细叙述电子商务环境下数字化信息资源的市场运作模式。