In this paper, a kind of layered bidirectional reasoning technology is introduced and implemented.
本文提出了一种分层混合推理技术，并给出了具体实现。
Proved by practice, expert system with a core adopting layered bidirectional reasoning technology has good values of popularization and appliance.
实践证明，以采用分层混合推理技术的推理机为核心的专家系统有良好的推广应用价值。
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