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本文对接触网设计中的基础及腕臂柱的选型应用，用专家系统理论进行了智能化分析，把对基础类型选择和腕臂柱安装图号选择这类知识从专家的大脑或文字材料中抽取出来，然后建立相应的知识库和推理机。在设计面向目标的推理机时，采用了回溯的方法和深度优先搜索策略。在规则的排序上将发生概率大的规则排序在前，在每一条规则的条件中，同样把必要条件或发生概率大的条件排序在前，并首先进行匹配。本系统用计算机模拟得出的结果是正确的。该结果对于指导接触同智能化设计具有一定的意义。
In this paper, the design of the catenary and wrist arm column based on the selection and application of expert system theory, intelligent analysis of the basic types of choices and wrist arm column figure number selection of such knowledge from the brain or text material experts In the extracted, and then create the appropriate knowledge base and reasoning machine. When designing goal-oriented inference engines, backtracking and deep-first search strategies were used. Sort rules in the probability of occurrence of large rules in front of the rules in each of the conditions, the same conditions or probability of occurrence of the same conditions in the order of the first, and first match. The result of computer simulation using this system is correct. The result is of some significance for guiding contact with intelligent design.