基于WebGIS的农业病虫害预测预报专家系统  

Expert System Based on WebGIS for Forecast and Prediction of Agricultural Pests

作　　者：刘明辉[1] 沈佐锐[1] 高灵旺[1] 张跃进[2] 王建强[2] 姜玉英[2] 

机构地区：[1]中国农业大学农学与生物技术学院,北京100193 [2]全国农业技术推广服务中心,北京100026

出　　处：《农业机械学报》2009年第7期180-186,共7页Transactions of the Chinese Society for Agricultural Machinery

基　　金："十一五"国家科技支撑计划资助项目(2006BAD08A01;2007BAD57B02-3)

摘　　要：以开源版MapGuide为WebGIS二次开发平台,结合.net技术开发了具有B/S三层网络架构的农业病虫害预测预报专家系统。依循专家经验预测方法构建病虫知识库,知识存放于SQL Server 2000数据表中,病虫害种类按照地理区域划分,各表所包含的病虫害影响因子描述、特征临界值、判别条件组合以及发生等级间构成一种网状模型。系统采用基于知识的前向型推理与基于系统案例推理相结合的方式。用户依据系统的向导式提示以及数据输入规范输入病虫害监测数据,系统将病虫害发生程度以GIS专题图、数据图表及文字等多种方式反馈给用户。实际运行结果表明,该系统操作性强,预测结果可靠直观。Based on the MapGuide module of WebGIS and . net technology, the expert system for prediction and forecast of agricultural pests on the Web was designed and developed. The pest categories were bio-regionalized in the system. The experts＇ knowledge, abstracted from their experiences and including the description of the knowledge, the critical values for the description, terms for distinguishes, and the grade of pests harm, formed a Web model and was stored in tables supported by SQL Server 2000. Expert-knowledge-based forward reasoning and case-based reasoning （CBR） were employed in the inference engine. Users can provide the necessary field-monitoring data to the system with the wizard and the guide of hint in the interface, and can get the potential grade of pests harm in GIS thematic map, chart and text. The demonstrations show that the system is easy to use and the prediction is accurate and intuitive.

关 键 词：网络地理信息系统 农业病虫害 预测预报 专家系统 

分 类 号：S126[农业科学—农业基础科学] S431.9