The prevention of common pig diseases depends on the experience of veterinarian greatly due to complexity of piggery pestilence. The expert system for the prophylaxis and treatment of common pig diseases is able to make the complex task more effective. The construction and implementation of this expert system is based on the bottleneck problems of the traditional expert system knowledge acquisition and the frame description of symptoms of common pig diseases, used the knowledge project method and technology, and combined the uncertainty inference and dispelling strategy of matching conflict and technology of multimedia. This expert system is used to imitate expert thinking and supplement or substitute for veterinary experts to guide the prophylaxis and treatment of common pig diseases. The overall structure, knowledge expression, inference mechanism and system realization would be expounded emphatically.
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