Development Of Pinus Sylvestris Var.Mongolica Cultivation Expert System In Xinjiang Arid Area

Pinus sylvestris Var.mongolica Cultivation Expert System,infused with profound expertise and factual experience,is closely correlated with the production practice.Different functional modules can be demarked according to the production flows of Pinus sylvestris Var.mongolica.Within each module,there are scientific and specific decision-making items which run through the whole process of seedling cultivation.For the excellent interface and simple operation of the system,there is no rigid operation requirement for its users,which can not only make for its application in basic production unit,provide information service and decision-making support to the forestry units and users in their real-time inquiry and mastery of Pinus sylvestris Var.mongolica cultivation knowledge and techniques,but guide in intensive production and management of tree seedling,nutrient bag seedling and merchantable big seedling as well.PAID,developed by NERCITA(National Research Center for Information Technology in Agriculture) and(NUDT) National University of Defense Technology,is adopted as developing tool of the expert system.The paper gives a brief introduction to the work flows, systemic structure,knowledge representation and reasoning mechanism of the platform. Production rule representation is used in the repository construction of system,which can show problems and solutions in the form of rules.Each rule includes the premise,conclusion, its weight,reliability and is stored in rule base after unified coding.The reasoning mechanism of the system adopts reliability method to represent the reasoning with uncertainty.When a fact table is selected by the user,the system will automatically display the corresponding decision-making item and recording date of the data,reason the decision-making item, produce reasoning result and display reasoning process.After the completion of decision-making,user can examine and print the reasoning process.They system can automatically pick up the explanation of all the rules used in reasoning process for user's examination.