其次，采用主成分分析法确定土地利用功能分区指标。

Then, using principal component analysis method, it set up the indicator system for land-use function district.

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采用主成分分析法(PCA)，对大沽夹河流域水质进行了定量化综合评价。

The water quality in Dagujia River basin was assessed by using the PCA method.

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并采用主成分分析法简化神经网络结构，将网络的输入节点数从60维降低到3维。

The PCA reduced the network's input nodes from 60 to 3 to simplify the neural network's structure.

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