In the aspect of the knowledge base structure for the expert system, it has described the matter ’ s former term and consequent according to the production system rule; on the side of the structure of reasoning machine, i have selected the synthetically reasoning and applied the algorithm of weight uncertain reasoning to have the reasoning analysis to the symptoms of disease 專家系統(tǒng)在知識庫的構造方面以產(chǎn)生式規(guī)則描述事件的前項和后項;在推理機的構造上采用混合式推理并應用加權不確定性推理算法對疾病的癥狀進行推理分析得出結論。