| Rapeseed(Brassica napus) is the main winter crop in Hunan Province, with large planted area, high culture technique and lower yield however. One of the important reasons lies in the damage resulted from diseases and insect pests and the damage is becoming increasingly serious because of the global climatic and cropping system's change. So This is a matter of cardinal significance to develop "The Diagnoses, Prevention and Cure Expert System for Rapeseed Diseases and Insect Pests", integrating the function of diagnoses, forecast and prevention and cure.The system is based on objected-oriented component technology and integrated environment of PAID expert system development tool. It adops the" Browser / Web Server/ DBMS"three-hierarchy architecture network modle, which the background database is the kernel tier, the Web server contains the service component, and the client brower browses and runs the system, with dseases and insect pests diagnosis and control subsystem, dseases and insect pests forecast subsystem , and such like .The contents and characteristics of this system can be summed up as following:1.The system establishes the knowledge base, which is rich in content and integrated words and pitures, combining qualitative reasoning and quantitative calculating after collecting and organizing the experts' knowledge, experience and research achievement on rapeseed plant protection. The form of knowledge representation is flexible as well as vivid.2.The system overcomes the limitations which can't forecast the diseases and insect pests of previous rapeseed expert system through establishing grey predicted model of Sclerotinia Sclerotiorum, and explain the methods of model and model-base representation and build up. |
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