Research On Control Valves Sell Pre-service Knowledge Acquisition And Expression

Based device control valve selection is software, which based on process technology and equipment merges. Knowledge systems are a support for the software. On the one hand, store control valves sell pre-service knowledge. On the other hand, use the appropriate method to make the knowledge information expresses. Knowledge information expresses is a difficult thing in knowledge engineering. It’s a great significance to study the control valves sell pre-service knowledge acquisition and expression.This topic made research for knowledge acquisition method, summary analogy and analyze most knowledge acquisition methods. Collect control valves sell pre-service material, analyze the material and find out useful control valves sell pre-service knowledge, establish knowledge acquisition specification is based on this. Researched on the method of knowledge arranges, make the knowledge to arrange based on descending classification stratified storage. Researched scope of application of the*.png\*.doc\*.xls storage format, establish knowledge arrange specification is based on this. Researched on the method of knowledge expresses, aim at the method of control valves sells pre-service knowledge expression (KXML). Studied knowledge information expresses for SVG format images and XML format text, experiment to establish XML model of process chart and parameters of valve selection. Its mathematical structure and express model achieved to merges of two kinds of knowledge, developed "knowledge expression tool" software, according to the method of knowledge expression. This tool includes complete draw tool to process chart, text information tools, data knowledge expressive interface. At the same time, this project achieved to knowledge expression show and management. Experiment to establish "knowledge management tool", is achieved to knowledge arrangement and visualization management. This project completed30sets processing installations and valve accessories selection knowledge.This topic made verification to the knowledge acquisition and arrangement method, try to use the "knowledge expression tool" and "knowledge management tool". Studies have shown that all of the KXML knowledge acquisition method and expression method have feasibility and practicality, can be solved the problem of based device control valve selection.