攀枝花南山台伸缩仪数字与模拟观测结果比较

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英文篇名：Comparison between simulated and digital data of extensometer in Panzhihua Seismic Station 中文刊名：四川地震 英文刊名：Earthquake Research In Sichuan 作者：吴 江 英文作者：WU Jiang (Earthquake Administration of Sichuan Province ; Sichuan Chengdu 610041 ; China) 中文关键词：固体潮 ; 曲线拟合 ; 线性漂移 ; 数字化观测 英文关键词：solid tide ; curve fit ; linear drift ; digital observation data 出版日期：2005-03-30 机构：四川省地震局台站管理中心 四川 成都 610041 年：2005 期：01 出版单位：四川地震

摘要

利用攀枝花南山地震台伸缩模拟和数字仪器并行观测数据,用三次多项式函数进行回归计算,将三次多 项式系数作为分析探讨数字和模拟两套仪器的长期漂移变化、线性变化、突跳性变化以及不规则变化等方面的 差异性指标。结果表明,数字和模拟仪器的观测结果在长期漂移变化、线性变化方面不存在显著差异;突跳性 变化以及不规则变化方面存在一些差异性。数字化与模拟观测结果在突跳性变化以及不规则变化方面差异的原 因是数据采集率存在差异所致,数字化数据采集率高意味着所包含的信息更为丰富。模拟观测结果的变化形态 与三次多项式函数曲线形态要接近些,相对来讲表现出模拟观测数据变化的单调性,这可能是仅仅读取整点时 数据的局限性所致。
To find if there is any difference between the simulated and digital observation data of extensometer in Panzhihua Seismic Station, we use 3 - th polynomial to fit observation data in a least squares sense. The fitting result parameter p is a row vector of length n+ 1 containing the polynomial coefficients. The p0, p1, p2 and p3 parameters can express the long- term drift, linear, parabola and 3 - th changes respectively in the observation data. So we use these parameters to discuss the differences in two kinds of data. Our comparison results show that two kinds of data have no any differences in long- term and parabola changes but change exists in 3 - th curve. In another words, there are some differences in high order irregular changes in observation data. So the digital observation data includes more information about high order irregular changes than simulated observation data. Our results can be of help for further study of two kinds of data.

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