应用遥感技术进行精细地物信息提取是研究生态系统结构、过程和功能的重要手段之一。由于热带地区生态系统复杂,为精细地物信息提取带来很大的不确定性,极易产生"同物异谱"、"同谱异物"的现象。研究以地处热带地区...应用遥感技术进行精细地物信息提取是研究生态系统结构、过程和功能的重要手段之一。由于热带地区生态系统复杂,为精细地物信息提取带来很大的不确定性,极易产生"同物异谱"、"同谱异物"的现象。研究以地处热带地区的海南岛精细地物遥感信息提取为例,在综合分析典型地物光谱特征、空间分布、斑块形状等基础上,构建和优化了水陆指数WLI(Water andLand differing Index)、乔灌草指数GSI(Grass and Shrub differing Index)、旱地-沙地指数SSI(Field and Sand differing Index),并结合新型通用植被指数VIUPD(Vegetation Index of the Universal Pattern Decomposition Method)及DEM(Digital Elevation Model)等多源数据,提出基于决策树的面向对象遥感信息提取方法。该方法首先确定要提取的对象,明确对象类别与对象隶属关系,然后逐层逐项的提取天然林、橡胶林、浆纸林等地物信息。结果表明,综合提取的精度达88%,相比传统的监督分类方法精度(66%)提高22个百分点,精度明显提高。展开更多
In order to solve existing problems about the method of establishing traditional system structure of decision support system(DSS), O S chart is applied to describe object oriented system structure of general DSS, an...In order to solve existing problems about the method of establishing traditional system structure of decision support system(DSS), O S chart is applied to describe object oriented system structure of general DSS, and a new method of eight specific steps is proposed to establish object oriented system structure of DSS by using the method of O S chart, which is applied successfully to the development of the DSS for the energy system ecology engineering research of the Wangheqiu country. Supplying many scientific effective computing models, decision support ways and a lot of accurate reliable decision data, the DSS plays a critical part in helping engineering researchers to make correct decisions. Because the period for developing the DSS is relatively shorter, the new way improves the efficiency of establishing DSS greatly. It also makes the DSS of system structure more flexible and easy to expand.展开更多
文摘应用遥感技术进行精细地物信息提取是研究生态系统结构、过程和功能的重要手段之一。由于热带地区生态系统复杂,为精细地物信息提取带来很大的不确定性,极易产生"同物异谱"、"同谱异物"的现象。研究以地处热带地区的海南岛精细地物遥感信息提取为例,在综合分析典型地物光谱特征、空间分布、斑块形状等基础上,构建和优化了水陆指数WLI(Water andLand differing Index)、乔灌草指数GSI(Grass and Shrub differing Index)、旱地-沙地指数SSI(Field and Sand differing Index),并结合新型通用植被指数VIUPD(Vegetation Index of the Universal Pattern Decomposition Method)及DEM(Digital Elevation Model)等多源数据,提出基于决策树的面向对象遥感信息提取方法。该方法首先确定要提取的对象,明确对象类别与对象隶属关系,然后逐层逐项的提取天然林、橡胶林、浆纸林等地物信息。结果表明,综合提取的精度达88%,相比传统的监督分类方法精度(66%)提高22个百分点,精度明显提高。
文摘In order to solve existing problems about the method of establishing traditional system structure of decision support system(DSS), O S chart is applied to describe object oriented system structure of general DSS, and a new method of eight specific steps is proposed to establish object oriented system structure of DSS by using the method of O S chart, which is applied successfully to the development of the DSS for the energy system ecology engineering research of the Wangheqiu country. Supplying many scientific effective computing models, decision support ways and a lot of accurate reliable decision data, the DSS plays a critical part in helping engineering researchers to make correct decisions. Because the period for developing the DSS is relatively shorter, the new way improves the efficiency of establishing DSS greatly. It also makes the DSS of system structure more flexible and easy to expand.
