加权平均算法在地电阻率日均值计算中的应用  

Application of Weighted Average Algorithm in Calculating the Daily Mean Value of Geo-electrical Resistivity

作　　者：张宇 王兰炜 胡哲 张世中 张兴国 娄晓宇 ZHANG Yu;WANG Lan-wei;HU Zhe;ZHANG Shi-zhong;ZHANG Xing-guo;LOU Xiao-yu(Institute of Earthquake Forecasting,China Earthquake Administration,Beijing 100036,China;National Institute of Natural Hazards,Ministry of Emergency Management of China,Beijing 100085,China)

机构地区：[1]中国地震局地震预测研究所,北京100036 [2]应急管理部国家自然灾害防治研究院,北京100085

出　　处：《地震》2023年第2期25-37,共13页Earthquake

基　　金：中央级公益性科研院所基本科研业务费专项(CEAIEF20220202)。

摘　　要：针对目前地电阻率观测中受电磁干扰影响而出现的数据精度低和应用效能不高的问题,提出将每小时固定点观测视为非等精密度测量过程,引入“权重”的概念,应用加权平均法计算地电阻率日均值。与常规算术平均值相比,加权日均值大幅减小了电磁干扰影响,可更为客观和真实地反映地电阻率变化特性。无论观测条件和电磁环境如何变化,都可以采用加权平均算法计算日均值,为地震分析预报提供科学、可靠的数据资料。Due to the electromagnetic interference,the geo-electrical resistivity observation data have the problems of low accuracy and low application efficiency.We could regard this observation as an unequal precision measurement and introduce the weight concept,then use the weighted average algorithm to calculate the daily mean value of geo-electrical resistivity.Compared with the arithmetic mean value,the weighted daily mean value significantly reduces the influence of electromagnetic interference,which can reflect more objective and real characteristics of geo-electrical resistivity.No matter what changes of observation conditions and electromagnetic environment,the weighted average algorithm can be used in calculating the daily mean value to provide scientific and reliable data for earthquake analysis and prediction.

关 键 词：地电阻率 电磁干扰 非等精密度测量 加权平均 日均值 

分 类 号：P319.3[天文地球—固体地球物理学]