晋西南黄土高原区植被覆盖度变化及其生态效应评估
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张文强, 孙从建, 李新功
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Vegetation cover change and ecological effect assessment in the Loess Plateau of Southwest Shanxi province based on remote sensing image
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ZHANG Wen-qiang, SUN Cong-jian, LI Xin-gong
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表2 遥感生态指数主成分分析 |
Table 2 Principal component analysis of remote sensing ecological index |
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年份 | | 第一主成分PC1 | 第二主成分PC2 | 第三主成分PC3 | 第四主成分PC4 | 2002 | LST | 0.421 | 0.886 | -0.037 | 0.192 | NDSI | 0.556 | -0.388 | 0.36 | 0.641 | WET | -0.468 | 0.045 | -0.51 | 0.72 | NDVI | -0.543 | 0.251 | 0.78 | 0.184 | 特征值 | 0.2377 | 0.0042 | 0.0028 | 0.0006 | 特征值贡献率/% | 96.9 | 1.71 | 1.14 | 0.25 | 2009 | LST | -0.426 | -0.287 | 0.783 | -0.352 | NDSI | -0.543 | 0.099 | -0.544 | -0.633 | WET | 0.674 | -0.434 | -0.059 | -0.595 | NDVI | 0.264 | 0.849 | 0.297 | -0.349 | 特征值 | 0.1973 | 0.0046 | 0.004 | 0.0026 | 特征值贡献率/% | 94.63 | 2.21 | 1.92 | 1.24 | 2017 | LST | 0.582 | 0.793 | 0.08 | 0.162 | NDSI | 0.674 | -0.594 | 0.135 | 0.418 | WET | -0.379 | 0.126 | -0.268 | 0.877 | NDVI | -0.251 | 0.053 | 0.951 | 0.174 | 特征值 | 0.133 | 0.0063 | 0.0044 | 0.0009 | 特征值贡献率/% | 91.98 | 4.36 | 3.04 | 0.62 |
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