The Research And Realization On The Expert System Of Psychological Consultation

Psychological problems have become one of the vital social issues in this age, and then the people increasingly pay attention to the psychological consultation accompanying by these problems. Under this social background, the development of computers and Internet have promoted the diversity of psychological consultation's forms and methods, such as e-mail, on-line chatting and on-line meeting. However, although these forms are not limited by time and space, the consultative process still needs the participating of mental counselors .Thus, how to make the computer substituting mental counselors come true, namely the intelligentizing of psychological consultation has become Artificial Intelligence's new focus in the realm of computer science. Thereby, using Expert System to realize psychological consultation has important applied value and significance.The thesis that integrates the knowledge of psychological consultation with the technology of Expert System is about the deep research on how to design and realize the Expert System of Psychological Consultation. This system uses the mode of man-machine conservation and has five parts, including knowledge express, repository, knowledge acquirement, inference machine and interactive interface.This thesis firstly abstracts the knowledge of psychological consulting that mainly is the symptom of psychological disease. The system should deal with two kinds of vagueness-the definition of disease's symptom and its extent. In the definition of disease's symptom, we reference Symptom Checklist90 and take the keywords of psychological disease's symptom as the knowledge of psychological consulting, and then put forward the context tree about the consultant's symptom. We use hierarchical structure to classify the keywords of psychological disease's symptom; they are consultant, psychological condition's classifying, every condition's expression and the sort of symptom. In the definition of the extent of disease's symptom, we use language variable in the theory of fuzzy. Based on it, we determine the fuzzy set theory, which use fall half echelon distributing, triangle distributing and ascend half echelon distributing as membership function. After that, we generalize and construct the fuzzy rules and then use fuzzy expression to show the diagnosing rules of psychological consultation' symptom. In the end, we build the fuzzy system of psychological consultation. After calculating the complexity of this system, we infer 145 rules that diagnosing anxiety. Based on these works, we use SQL Server 2000 database to establish repository, including the data and the knowledge. The data consist of users' data and the system's data. The knowledge consists of rules and the meta knowledge.In the realization of the knowledge acquirement, we use passive knowledge acquirement, and use the knowledge compiler to pass the knowledge provided by the knowledge source to the repository of the system. According to operate the knowledge compiler, such as editing, deleting, inputting and amending rules, the knowledge engineer administrates the repository. On the premise of this repository, users can input the keywords of symptom in the term of the requirement according to man-machine interactive interface. Based the acquiring keywords, we design an inference machine based on fuzzy rules to infer and diagnose the sort of the psychological disease.For the sake of the convenience of the interactive interface, we have designed a foreground interface to connect the parts of psychological consultation into the whole and constitute a practical expert system for psychological consultation based on the interface dialogue technology. By the practical example we can say the expert system can carry on the valid diagnosis. Finally we have lay an appropriate foundation for the further research and realization in this realm.