reasoning backward

Forward reasoning and backward reasoning were integrated in inference engine to realize the 3 core functions: failure mode identification, failure cause analysis and corrective measure proposal.

推理机采用正反向推理相结合的工作方式，实现气门失效诊断的三个核心功能：确定失效模式、分析失效原因以及推荐改进措施。

The system adopts the forward and backward chaining, researches the reasoning under uncertainty and inexact reasoning;

提出对系统采用交互式知识获取途径、双向推理控制策略，对不精确推理和不确定性推理的传播算法作了一定的研究，成功地将其应用到马铃薯专家系统的构建之中；