<正>利用ASTER原始的9个波段数据进行主成分、小波、MNF、RBV等图像融合和变换生成37个特征波段。结合江苏苏北平厚建湖县48个杨树样地调查数据。分别就杨树平均高、年龄和单位面积蓄积量进行传统的统计建模分析。并在数据挖掘软件Cubist支持下研究了回归树建模。对比两次分析发现。因为利用回归埘建立的遥感估算模型总体精度优于传统的单输入模型。所以大地域遥感生物物理参数制图时采用回归}对模型更为可行和可靠。

Pine wilt disease caused by nematode could be controlled with three ways: (1) Applying a ttractant to killing the vector, adult of Monochamus alternatus~ (2) Releasing Scleroderma guani to control the larva of Japanese pine sawyer; (3) Applying the attractant and releasing S. guani, simultaneously. The result shows that the three measures were all effective to control the pine wilt disease. M99-1 attractant could make dead tree percentage to decrease 61%. If the M99-1 attractant and releasing S. guani are applied simultaneously, the percentage of pine wilt disease will be reduced 77%.