logic data model meaning in Chinese
逻辑数据模型
Examples
- The distribution gis data management methods and its application in distribution running are systematically researched , which compose distribution gis network topology analysis ( nta ) and optimal rush - maintain path ( orp ) , and distribution planning , which composes distribution spatial load forecasting ( slf ) : ( 1 ) with systematic analysis on the relationship between spatial data model and spatial data structure , the distribution feature and the two common gis data models are analyzed , which are vector and raster data models . then the conceptual and logic data models of distribution gis are designed . the spatial data storage structure is given by using vector method , and their detailed data management methods are proposed
（ 4 ）将gis的空间信息分析功能应用于配网空间负荷预测（ saptialloadforecasting ， slf ）的研究：综合利用灰色理论及遗传规划的优点，提出了一种根据馈线的历史峰值负荷进行外推的组合slf法：首先采用负荷转移耦合法来修正负荷历史，消除由于负荷转移引起的误差；然后根据实际馈线路径和配网gis图形分层，运用图层叠加分析得到馈线的实际供电范围；接着采用灰色关联度聚类方法对馈线负荷增长曲线进行聚类分析；最后采用遗传规划来对灰色聚类结果进行符号回归，分别得到每一类曲线的最佳拟合曲线形式。 - It also discusses the realization of the system . meanwhile , beginning with the analysis of the need few the system , the thesis draws a data flow diagram , studies the entities and their relation involved in the system and sets up the concept data model . then it establishes a logic data model and opens up the managing system of the automatic storage & retrieval system d atabase supporting the internet structure of the client / database server by using sql server 2000 database system
同时，从啤酒自动化仓库管理系统需求分析入手，画出系统的数据流图，研究系统所涉及的实体以及实体之间的关系，建立概念数据模型，再建立逻辑数据模型，最后采用sqlserver2000数据库系统开发了支持客户机服务器网络结构的啤酒自动化仓库管理系统数据库，为仓储作业的实现和库存管理提供数据存储方面的支持。