| Expert System is a kind of intelligent system; it is a computer inference system which has a great amount of special knowledge and experience. Based on artificial intelligence technology, it could deduce and judge according to special field knowledge and experience that offered by one or more experts, so that it simulating expert carries on decision on a certain complicated problem .At present, the expert system has been widely used in many field, such as agricultural expert system.For the expert system, the knowledge arranged by experts mostly belongs to the shallow knowledge in this field, and is mainly rule-based knowledge in formal conditions. At present, most of the agricultural expert systems are static in our country. Because the expert system does not really have the ability to learn, the performance of the system is that it can only deal with a variety of conditions which had been treated by human experts, unable to "adapt", Artificial Intelligence confronted with a serious challenge.In order to overcome the problems of the existing expert system, such as the speculative simplicity, poor capacity on-site, disability to take full advantage of network to realize remote network services and knowledge base could not change dynamically, it develops a new GSM-based agricultural expert advisory system to implement dynamic changes of the Knowledge base, through the network to deal with the current insoluble problems of the existing expert system, and to realize treatment at the scene using the mobile intelligent terminal. The system adopts the database of a mobile version and is developed with Microsoft SQL Server Mobile Edition and vb.net2005.The system adopts GSM-enabled mobile intelligent devices and uses the Microsoft's net architecture to design the expert system. System includes four parts: overview, reasoning, browsing, and connecting. Expert system reasoning engine applies genetic programming (GP) to improve the reasoning ability. Aiming at insurmountable problems, the use of GSM network SMS short message function of the environment and the current crop status and other data to form sent to the counseling centers, an analysis by experts, and deal with the short message mode to the conclusion back to the scene of mobile smart devices ; equipment after receiving a short message can be directly imported into the database, thus improving the expert system knowledge base, an increase of database integrity and universality of the system. The system structure adopts the modular mode, changes the knowledge base and database at any time and conveniently according with the specific types of crops without affecting the other modules.The system can implement the specific treatment of different crops without amending the procedures and improve the expert system's ability to deal with complex situations and the analysis accuracy with the use of GP algorithm.Also it can realize the expert system network services and improve the ability to deal with problem at the scene with the use of GSM network. The platform in this system is a mobile intelligent terminal which is portable and can realize on-site treatment. |