Research And Implementation Of Disease And Insect Prevention And Cure For Fast-growing And High-yield Forest Expert System

This article is from the country propping up science and technology plan problem the key technology studies and applies of fast-growing and high-yield timber forests manage process. This project is to be geared to the needs of extensive forest farmer and forestation enterprise , the integrated forest tree making use of modern information technology cultivates and the tube protects the intelligence decision-making hold out system making use of the process waiting for relevance technology means and knowledge in the entire proceeding of entire forest management control , developing fast-growing , high-yield timber forests cultivating long-range consultancy service of technology system and fast-growing , high-yield timber forests giving birth to a child (cultivate) , managing , pest control , forest tree gain. Whose purpose is to give birth to a child specifically for fast-growing , high-yield timber forests manage the entire proceeding provides the special field technology hold out, take changing the rough management control pattern falling behind , improving land productivity as, the extensive peasant household , forestry enterprise and forest farm that improve economy income level service.The system is a integrative system that contains aspects as plant disease and insect pests prevention, cure and forecast, basic information of forest, disease and insect query and FAQ. Plant disease and insect pests prevention, cure and forecast system are ruling systems. Basic information of forest, disease and insect query system is general querying system. FAQ system is based on searching. Different systems are based on different structures of database and the only one thing to discuss is RDS. How to express knowledge for different systems and save it in RDS is the main point to discuss.In this paper, fast growing forest pest and disease control systems and diagnostic systems design and implementation, including the expression of knowledge, design of reasoning machine and the implement of the explain function. Pest and disease diagnosis of reasoning which in the course of this paper, a method of rule selecton is put foword. This method is based on vector space model, rewrites the TF-IDF fomular which is ususlly used in test classification to compute the weight and chooses the rule according to the similarity of vectors.In addition to the introduction of search technology expert system modules of the system is a try to break the traditional development model of expert system.The system adopts the B/S structure which provides independence between proscenium and background. The RDS here, is the famous open code database software MYSQL5.0 and the exploitation technology is JSP whose strong ability of connecting, accessing and controlling of database provides powerful support for knowledge database.