基于知识的空间决策支持模型集成

Integrating Spatial Decision Support Models Based on Knowledge

提出通过黑板集成模型 ,设计并实现了一个以模糊逻辑为基础的空间决策支持系统。该系统以产生式规则表达知识 ,采用逆向推理 ,使之成为兼具地理信息系统、专家系统 ,应用模型的集成化空间决策支持系统。使用该系统建立了重庆市区投资环境评价信息系统。

In the Spatial Decision Support tool System (ISAT), rules of expert system are expanded so that the expert system can not only use data extracted from GIS and database, but also need decision support models. By using these broad sense rules, we can bring knowledge process in geographic analysis, and integrate GIS, database and spatial analysis model. Model Data Blackboard is the key of integration, which consists of a variable table, a model table a true value maintaining system and a blackboard monitor. By this approach we can incorporate mathe models one by one. The system is also based on fuzzy logic. Model Data Blackboard can manage precision data and fuzzy data, and the mathe model functions exchange data between them through the model data blackboard. By prescribing the principle about computing certainty factors, certainty is processed approximately.\;Throught its knowledge macro language, the ISAT can setup a working environment for one spatial decision support course. The knowledge macro language program sets the objective of reasoning machine of the expert system, manages the input and output of the ISAT data. ISAT can interact with raster file of geographic information system, database and text file with its knowledge macro language program.\;The method introduced in this paper is also a preliminary way to design the knowledge based spatial analysis information system. We have done a case study with knowledge based investment assessment information system for urban district of Chongqing City in Sichuan province of China.