Construction Of Forest Disease And Pest Diagnosis Consultation Expert System Based On Network

Environment and development are the two themes which human society faces today. Forest is the substantial basis for human beings to live and develop. Through the good control of forest diseases and pests and carrying sustainable control into execution, forest resources can be protected and environment can be well maintained. In order to guarantee prevention and control target effectively, forest disease and pest control strategies should be changed. Some new information technologies have been adopted to enhance the development of forest disease and pest control. This paper takes advantage of network, database and expert system technologies together with existing technology and experience from disease and pest experts to construct forest disease and pest diagnosis consultation expert system, which is supported by the national 863-Projects.Theory of expert system and real situation in related fields are firstly introduced. Analysis on information technology for the system and investigation into forest disease and pest diagnosis method are followed. Then the whole structure and function for the system is designed, and appropriate system structure and development and running environment are also carefully selected. After being scientifically extracted and reasonably arranged, the knowledge is expressed through multifold ways. Incorporated with database, the knowledge base is established. Obverse and reverse reasoning control strategy and AND/OR tree search strategy are both used in the inference machine to simulate the way that the expert solves the problem. At last, the expert system is successfully implemented and is practically validated and put into use in Beijing city. Finally, further research and what can be improved for the system are indicated.