【作者】 陈英义；

【导师】 李道亮；

【作者基本信息】 中国农业大学 ， 农业机械化工程， 2005， 硕士

【摘要】 在对国内外大量文献和北方农牧交错带沙尘源生态系统分析的基础上,首先对沙尘源植被恢复的理论框架进行了系统归纳,提出了植被恢复能力等级、植物选种和植物种植方法选择模型的评价指标体系;建立了北方农牧交错带沙尘源植被恢复能力等级评价模型、植物引种模型和植物种植方法选择模型及植被恢复数据库和植被恢复规则库;最后采用ASP.NET技术研发了北方农牧交错带沙尘源植被恢复决策支持系统。重点开展了如下工作: (1) 采用模糊综合评价方法建立了恢复能力等级评价模型。该模型可以评价沙尘源的植被恢复能力等级,为决策者确定沙尘源的恢复顺序提供决策支持。 (2) 基于气候—地形相似性原理,综合欧氏距离和灰色关联分析法,建立了植物品种选择模型。模型可以根据植物的选择地和选择源地气候—地形相似程度,确定适合当地自然条件的植物品种。 (3) 采用基于If—Then规则推理方法,构造了植物种植方法选择模型。该模型可以根据沙尘源的土壤、气候、人为和植被现状等条件确定植物种植方法,为确定植物种植方法提供决策支持。 (4) 结合以上三个模型和用户需求分析的基础上,使用ASP.NET以及其他相关技术,构建了系统框架结构,初步建立了植被恢复数据库和规则库,最终建立了北方农牧交错带沙尘源植被恢复决策支持系统。 初步应用结果表明:该系统具有一定的适用性。更多还原

【Abstract】 Based on the analysis of the theoretical framework of revegetation, user needs, and the collection of the plenty of successful revegetation cases, the revegetation potentiality evaluation model, the plant speicies selection model and planting methods selection model. Using ASP.net a decision support system which integrates with the models maitioned above puts forword for the sand-sources in the northern agriculture and animal husbandry interlocked area. The main works of this research are as follows:(1) Based on the analysis of the fuzzy integrated evaluation, A revegetation potentiality model was integrated and used to evaluate the revegetation potentiality of the sand sources.(2)Based on the analysis of euclidean distance and gray relating priority analysis algorithms, and the plant speicies selection model was integrated in the DSS. This model could select the-proper plant speicies for revegetation, by considering the similarity of the climate and soil.(3)The clastic production rule was selected to express the knowledge on revegetation of abandoned wastes, and the rule-based reasoning was used to build plant methods for abandoned land selection model identify the prepare works, planting, plant management and other protection methods on the sand-sources based on the analysis of soil, climate, plant behaviours and revegetation grade and so on..The prototype system was used in Hun Shan Da Ke sand-sources in the northern agriculture and animal husbandry interlocked area, which was proved to be useful for the local enterprises.更多还原