At the same time by using c program language i finished this expert system efficiently , including knowledge expressing , multi - task completing , problem solving and interpreting on tms . additionally , i make emphasis on describing the bnf , which is a formation of knowledge describing language ( kdl ) , and make thorough analysis on principle of syntax and grammar of kdl . i have analyzed the result of simulating field data from the expert system , the conclusion is that the expert system has outstanding effects on application in air separating optimizing system 文中讨论了该优化专家子系统各模块的功能及开发思想策略，并介绍了多任务专家系统的知识实体表达、多任务协调求解、基于tms的问题求解方式、基于tms的解释机制等内容，详细描述了知识描述语言( kdl )的巴科斯范式( bnf )形式，具体分析了kdl的语法、语义分析器的作用原理，对现场数据专家子系统调优仿真结果进行了分析，仿真控制结果表明专家系统在气分优化指导系统中的应用具有很好的效果。
