Selecting the proper classification features, the primary crop types in North China could be identified through the analysis of the vegetation index time series in growth season.
通过对作物生长期内植被指数变化曲线分析，选择合适的分类特征，进行华北地区主要作物类型识别。
Preliminary discussion on the standards for classification of 1-year nursery stuck of Tectona grandis L. is conducted with the method of gradual cluster analysis and relevant quality index collection.
通过相关分析进行质量指标提取，采用逐步聚类分析方法，对柚木1年生苗木分级标准进行了初步探讨。
Based on the analysis, the thesis studies the theories and methods of green space system planning for small towns, including the classification, index and layout structure of green space.
探讨小城镇绿地系统特征的同时，也分析总结当前小城镇绿地规划建设存在的问题。
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