Study On Expert System For The Diagnosis Of Diseases And Insect Pests Of Chinese Jujube

Based on C/S (user/scratchpad/server), the expert system for diagnosis of Chinese jujube diseases and insect pests is a part of Chinese jujube expertvsystem that financed by the education department of Hebei province. The text F expatiates that the holistic design, method of information collection anddiagnosis & inquire about Chinese jujube plant diseases and insect pests by Internet.Information of the diagnosis experts system mainly roots in valid date and experts' experience on basis of which, 31 diseases and 33 insect pests within the production of jujube have been chosen as the subject for research in the system. An object-oriented information representation solves the problem of the "bottleneck" of the expert system on a certain extent, and its' information database can be appended deleted and modified by web module.The type of Jujube system information is complicated which includes qualitative information, quantificational information, fixed information and uncertain information. The expression of information is formation of facts and connections of jujube diseases and pests, i.e. the collection of the required information must be selected and arranged so that it suitable for the date ' t operation on the computer. Also it must be suitable for the expression andutilization of information. Access database and Access key word database of plant diseases & insect pests have been built up according to the catalogue of the disserve part, namely the whole tree^ root> bole and brancru lamii^ bud^ blossom ^ fruits, in addition, lots of pictures and a few kinescope are used in the system as well.In view of the complexity of the information and the failure to provide reliable information by the users, the system is set up in favor of combination-43-method of date drive and aim drive, thus the positive and negative commix inference model is more suitable for the practical use of the expert system. According to requirement of the integrity of the expression of information interface and the various levels of users, the diagnosis mode of Chinese jujube expert system can be used in two ways: the mode of diagnosis and that of the key word mode for the search of information. The search model of diagnosis is a concluded way by the guidance of computer system. Users can choose disserve part and typical symptom according to the users' guide. Inference engine may use object-oriented strategy to give the name of plant diseases and insect pests. The model of key word diagnosis is that the user chooses or inputs key word to match with normative key word, and the inference engine can also give the name of plant diseases and insect pests that is provided with the same symptom.