基于Oracle9i的物流空间信息数据库的一种设计与实现方法

通过Oracle Spatial组件的支持，我们可以在物流系统中实现时空间信息的解决方案。本文探讨了物流空间信息需求，介绍了用Oracle spatial建立物流空间数据库的方法，Oracle可以作为物流空间信息管理分析的一个较好的解决方案。     

管理信息系统中在线帮助子系统设计

在线帮助是数据库管理系统的重要组成部分。本文以 Foxpro2.0为基础讨论了面向应用的在线帮助子系统的几种设计方法。     

EFFECTS OF SECTOR AGGREGATION ON CO2 MULTIPLIERS IN MULTIREGIONAL INPUT–OUTPUT ANALYSES

The past few years have seen the emergence of several global multiregional input–output (MRIO) databases. Due to the cost and complexity of developing such extensive tables, industry sectors are generally represented at a rather aggregate level. Currently, one of the most important applications of input–output analysis is environmental assessments, for which highly aggregate sectors may not be sufficient to yield accurate results. We experiment with four of the most important global MRIO systems available, analyzing the sensitivity of a set of aggregate CO₂ multipliers to aggregations in the MRIO tables used to calculate them. Across databases, we find (a) significant sensitivity to background system detail and (b) that sub-sectors contained within the same aggregate MRIO sector may exhibit highly different carbon multipliers. We conclude that the additional information provided by the extra sector detail may warrant the additional costs of compilation, due to the heterogeneous nature of economic sectors in terms of their environmental characteristics.     

复杂结构报表的快速生成与修改

本文叙述了如何使 FOXBASE 报表的数据库与 CCED 制表进行连接,以实现对结构复杂的报表进行快速制表与灵活修改报表的任务。     

电子数据库法律保护的原因分析

电子信息技术和网络的发展,促进了电子数据库的产生和发展。电子数据库的组成材料既可以是享有著作权的数据,也可以是不享有著作权的数据。数据库制作者通过对这些数据进行选择和编排,形成了检索方便的电子数据库。因此,电子数据库作为一种智力创造成果,法律必须对它提供特殊保护,以规范各种著作权之间的关系。     

The development and diffusion of customer relationship management (CRM) intelligence in business-to-business environments

CRM data is among the most important and comprehensive information available to management in many organizations. This is particularly the case in business-to-business marketing, where the firm's extended working relationship with its customers is frequently crucial for the maintenance of a healthy business. However, in many instances management has treated CRM data as highly specific to its client relationships and has therefore neglected to analyze this information across market segments, customer categories, and customer–firm relationship forms in order to draw meaningful conclusions for driving business decisions.     

A New Measure of Multicollinearity in Linear Regression Models

Databases with a lot of data very often mean little information. It is because of the collinearity of variables which consist of the data of the database. This collinearity is in fact a kind of redundancy of the database.
In the study a new indicator is given. With this indicator, which contains the eigenvalues of the variables' correlation matrix, it is possible to quantify the percentage of collinearity: from 0% (all the eigenvalues are equal to 1) to 100% (all the eigenvalues, except the first, are equal to 0).     

数据挖掘在高校后勤中的应用

如何快速有效地从日益膨胀的高校后勤数据中,挖掘出潜在的、有价值的信息,使之有效地在高校后勤管理、经营服务和决策中发挥作用,是急需解决的问题。文章针对数据挖掘技术及其在高校后勤中的应用展开讨论和研究。