沥青路面施工专家系统设计与实现

【作者】 刘建兰；

【导师】 胡长顺；

【作者基本信息】 长安大学 ， 道路与铁道工程， 2003， 硕士

【摘要】 沥青路面施工专家系统是一个智能计算机程序，它利用存贮在知识库中的专家知识和经验，通过推理来解决沥青路面施工中的技术难题。本课题从解决沥青路面施工实践中的难题出发，以实际应用为目的，对建造沥青路面施工专家系统的关键技术进行了全面的研究并提出了适合于沥青路面施工领域的专家系统开发技术。 寻求适合于沥青路面施工知识特点的知识库建造技术是本课题的重点之一。本文总结了沥青路面施工的技术特点并针对此特点选择了两种知识表示方法，其中，产生式规则表示沥青路面施工中概率意义下的不确定知识，模糊评判矩阵表示沥青路面施工中模糊意义下的不确定知识；本文研究了产生式表示法和模糊评判矩阵在关系型数据库上的实现技术，并对知识库的知识获取机制进行了研究，提出了沥青路面施工专家系统的知识获取方法；本文还对知识库的管理进行了探讨，主要内容包括：知识库的一致性检查，知识的增加、修改和删除，知识库的求精。 寻求适合于沥青路面施工领域的推理机建造技术是本课题的另一个重点。本文研究了沥青路面施工专家的思维模式，并采用了两种推理模型予以模拟，其中，基于C-F模型的不确定推理模拟沥青路面施工专家的简单、线性思维，模糊推理模拟沥青路面施工专家的模糊思维。本文仔细研究了模糊推理的实现技术，主要包括：模式匹配、推理控制策略，冲突消解策略。 对专家系统进行评价是建造专家系统的重要一环。本文研究了沥青路面施工专家系统的评价方法，给出了评价模型并应用此模型对沥青路面施工专家系统进行了评价及分析。更多还原

【Abstract】 Asphalt Pavement Constructing Expert System (APCES) is an intelligent computer program, which can use expert knowledge and experience memorized in the knowledge base to solve the problems by reasoning in the asphalt pavement constructing field. With an eye to solving the problems in the asphalt pavement constructing field and Aiming at the practical use, this project researches thoroughly the key technology of building an APCES, brings forward an Expert System developing-technology for asphalt pavement constructing.Finding a developing-technology for knowledge base that accords with the knowledge characteristics in the asphalt pavement constructing field is one of the emphases in this project. This paper sums up the technology characteristics of asphalt pavement constructing and selects two knowledge representation methods according to it. Of the two knowledge representation methods, production rule represents the uncertain knowledge relating to probability, while Fuzzy evaluation matrix represents the uncertain knowledge relating to fuzzy. This paper researches how to memory the production rule and fuzzy evaluation matrix in the relational database. In this paper, knowledge acquisition mechanism is studied and a knowledge acquisition method is presented. This paper also discusses the knowledge management technology that concludes knowledge coherence checking, knowledge increasing and modification and deletion, knowledge refinement.Finding the developing-technology for reasoning machine which accords with the asphalt pavement constructing field is anther emphasis in this project. This paper researches the asphalt expert’s thinking pattern and adopts two reasoning model to simulate it. Of the two reasoning model, uncertain reasoning based on C-F model simulate the asphalt expert’s simple and linear thinking, while fuzzy reasoning based on fuzzy theory simulate the asphalt expert’s fuzzy thinking. Fuzzy reasoning technology is thoroughly studied in this paper, which includes pattern matching, reasoning control tactic and conflict resolution tactic.Evaluating the Asphalt Expert System is an important step in the process of building it. In this paper, the evaluation method for Asphalt Expert System is studied and an evaluation model is presented, thus, the Asphalt Expert System is evaluated and analyzed according to it.更多还原