Time series analysis and statistical test provide quantitative criteria to determine the optimum observation frequency.

时间序列分析和统计检验提供了优化地下水位监测频率的定量标准。

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Using some techniques, such as the selected observation frequency band, deep-buried electrode, filtering of waves etc, can reduce the interference.

采用选择观测频段、埋深电极、隔直、滤波等技术措施减小干扰。

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More than through his words, I've learned from observation; from the locations of his ads, the frequency of his posts, and a thousand other details the casual reader would never notice.

除了他的文章外，我通过观察，通过他的广告位置，通过他的作品更新的频率，以及通过一千个读者从未注意过的其他细节来学习。

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The fifth is the observation in reality of a predicted link between increased sea-surface temperatures and the frequency of the most intense categories of hurricane, typhoon and tropical storm.

ECONOMIST: Changing science