倾斜仪观测值中函数项的参数估计和谱分析
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摘要
选用十个随时间趋势性变化的函数作为零漂估计函数项，选用一系列不同周期的正、余弦函数作为周期变化的函数项，建立倾斜仪观测值中所含函数项的数学模型，给出了对上述两类函数按统一标准计算及挑选的方法。对漳州地震台ＳＱ－７０Ｂ倾斜仪资料的计算结果显示这一数学模型基本符合实际；周期等于５０天的振幅，与台湾Ｍ２＞５．０级地震和福建省内ＭＬ≤４．０级地震对应较好。
It is presented to seleet ten functions varying tendentiously in time to estimate the drift of tilt observation and to select the Sine and Cosine functions with various period as the function with different period so that the mathematital model of the function terms contained in tilt observations is founded,and the method for selecting and calculating both of the functions mentioned above is given in this paper.The results computed from the data of tilt observation at Zhangzhou station show that the model is coinsident with the actual conditions,tliat the amplitude with the period of 50 days is correspondins to the earthquakes in Taiwan M,>5.0 and in Fujian province ML≥4.0.
It is presented to seleet ten functions varying tendentiously in time to estimate the drift of tilt observation and to select the Sine and Cosine functions with various period as the function with different period so that the mathematital model of the function terms contained in tilt observations is founded,and the method for selecting and calculating both of the functions mentioned above is given in this paper.The results computed from the data of tilt observation at Zhangzhou station show that the model is coinsident with the actual conditions,tliat the amplitude with the period of 50 days is correspondins to the earthquakes in Taiwan M,>5.0 and in Fujian province ML≥4.0.
引文
1国家地震局科技监测司。地震预报方法实用化研究文集，形变、重力、应变专辑。北京：地震出版社。19912地形变学地震分析预报方法指南。震情研究。1989（10）3中国科学院计算中心概率统计组编。概率统计计算。科学出版社。19794郑治真。数字信号处理基础。北京：地震出版社，1988
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