为检验潮汐观测期间灵敏度及相位的变化，提出一种短资料的调和分析方法。
A harmonic analysis for short data series is suggested to check the variation of the sensitivity and phase lag during the tidal observations.
对云龙台的水管倾斜仪观测数据进行了倾斜固体潮的潮汐分析，发现EW和NS两个分量的振幅因子异常变化与地震有较好的对应关系。
Based on the water tube tiltmeter observatory data, the author analyses the ground tilt tide, finds that the abnormal change of amplitude factors of EW and NS componts is corresponding to earthquakes.
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