Research On Rice Disease Diagnoses Application Based On Fuzzy Reasoning

Rice is one of the major grain crops in our country. The prevention of rice diseases is main task in the process of planting rice. The rice diseases are still diagnosed artificially according to the disease symptoms and symptom sites by agricultural experts. The method is reliable, but a large number of agricultural experts are needed to visit the front line of agricultural production personally. Because the number of agricultural experts is limited and the amount of their work task is large, the method can only be used at some time and some places rather than in actual production. So the research of automatic and intelligent diagnosis system for rice diseases is very important.Rice Diseases Diagnosis System based on Hierarchy Analysis Method and Fuzzy Comprehensive Evaluation Theory is proposed, according to the characteristics and diagnosis situation of diseases, the application and development situation of our agriculture and the research progress at home and abroad. In the system, export system is introduced and fuzzy theory is applied.In the thesis, on the base of the characteristics analysis about rice diseases, hierarchy analysis method is introduced and weight calculation model is set up in which fuzzy indicators are included such as symptoms, sites, and so on. In the model, the difficult is resolved in the nature determination of mathematical methods. Fuzzy comprehensive evaluation theory is used to set up the reasoning model of rice disease diagnosis system. The fuzzy factors of each level are evaluated comprehensively. Based on the reasoning model, export knowledge expression form and reasoning mechanism of rice disease diagnosis are analyzed, the storage structure of export knowledge based on two-dimensional relational model is designed and object-oriented design model of reasoning engine is designed using object-oriented design methods. On the base of the analysis and design of export knowledge and reasoning engine in Rice Diseases Diagnosis System, Rice Diseases Diagnosis System based on B/S and fuzzy reasoning model is realized and the running results are given.The running results show that Rice Diseases Diagnosis System based on reasoning model has realized computer intelligent diagnosis of rice diseases and it is worth applying and promoting.