Principle component analysis is based on multi-statistics method, and turning into an important way to proceed data for production monitoring and quality control.

主成分分析属多元统计方法，正逐步成为控制领域中一种重要的数据处理方法，用于生产监测和质量控制。

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The method to estimate typical weather day is discussed by statistics and analysis on the basis of meteorological data.

对某地区多年气象资料进行统计和分析，给出大气环境影响评价中典型气象日的确定方法。

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In this paper, the carrying capacity of regional water resource was analyzed and evaluated with the method of main component analysis, according to water resources statistics data of Xian city.

运用主成分分析法对区域水资源承载力进行分析评价，评价结果客观地反映了西安市及各区的水资源开发利用状况。

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