Crop Growth Models Based On The Agricultural Expert System Design And Realization

This paper first reviews the studying evolvement about Crop Imitating Model applying to production and Agricultural Expert System. After summarize the theory of Expert System, this paper bring forward the applying tech. and system structure.The distributed counting structure of B/S system is adopted in this paper. Developed tech. of Component is applied. The developed rules of COM/DCOM are followed. In order to realize the integration Crop Growth Model with ES, this paper design developed tools of Agricultural Expert System under network by utilizing theories of knowledge engineering and information tech.. On the base of applied tech. and system structure, the key tech. are expressed in detail. It includes:Knowledge representation technology: it is described in two stages by "Depictive frame + Rule group". "Depictive frame" is used to reflect the factors concerning question field. "Rule group" reflects the son-question in question field; knowledge management system: it is made up of knowledge-base editing component, factor classifying component, knowledge inspecting component and extractive knowledge component; uncertainty reasoning adopt method of elicitation search strategy and data drive controlled by member knowledge. It take reliability of compound proof at first. That can resolve the matching contradiction. Reasoning explanation introduce pre-text and followed method of resolving path. Knowledge discovery component take SLIQ as basic arithmetic. It provides classification model in two stage forms which aim at training suit. That is decision tree and productive rule. Simulation Model System is composed of model management, model dictionary and simulation model. It provides two kinds interface which are model parameter adjustment and crop growth simulation. Model dictionary provides the description of model component and information of data abstract. It is the place where simulation model and expert system are joints. The wheat growth simulation model component provides mechanism model of wheat growth etc.Above all, this paper gives the knowledge to perfect the system based on technology which are expressed by knowledge in existence. These are included to enhance the management function of component, to add mix reasoning, to provide diversification component of knowledge auto-gain and at last to enrich model types, etc.