Asphalt Pavement Construction Expert System Design And Realization

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.