地震工程学报
地震工程學報
지진공정학보
China Earthquake Engineering Journal
2015年
2期
623-628
,共6页
分段回归%水平摆%相关系数%回归方程
分段迴歸%水平襬%相關繫數%迴歸方程
분단회귀%수평파%상관계수%회귀방정
subsection regression%horizontal pendulum%correlation coefficient%regression equation
以精河、库尔勒水平摆观测数据为因变量,以地温、气温、气压为自变量进行分段回归分析,结果如下:(1)地温和气温是影响精河、库尔勒水平摆观测数据年频段信息的主要因素,它们之间具有准线性关系;(2)去掉趋势后,观测数据与地温、气温、气压之间的线性相关性明显增强,说明观测数据的趋势转折变化不是气象因素造成的,可能是观测区域的构造应力变化所致;(3)研究表明分段回归是全样本回归分析方法的一种改进,是降低时间序列数据处理难度的有效方法。
以精河、庫爾勒水平襬觀測數據為因變量,以地溫、氣溫、氣壓為自變量進行分段迴歸分析,結果如下:(1)地溫和氣溫是影響精河、庫爾勒水平襬觀測數據年頻段信息的主要因素,它們之間具有準線性關繫;(2)去掉趨勢後,觀測數據與地溫、氣溫、氣壓之間的線性相關性明顯增彊,說明觀測數據的趨勢轉摺變化不是氣象因素造成的,可能是觀測區域的構造應力變化所緻;(3)研究錶明分段迴歸是全樣本迴歸分析方法的一種改進,是降低時間序列數據處理難度的有效方法。
이정하、고이륵수평파관측수거위인변량,이지온、기온、기압위자변량진행분단회귀분석,결과여하:(1)지온화기온시영향정하、고이륵수평파관측수거년빈단신식적주요인소,타문지간구유준선성관계;(2)거도추세후,관측수거여지온、기온、기압지간적선성상관성명현증강,설명관측수거적추세전절변화불시기상인소조성적,가능시관측구역적구조응력변화소치;(3)연구표명분단회귀시전양본회귀분석방법적일충개진,시강저시간서렬수거처리난도적유효방법。
Crustal deformation observation stations built near the surface cannot avoid distractions that include infor-mation from the Earth’s interior and exterior.Identifying earthquake precursors and other distraction factors is cur-rently difficult.The regression method is a mathematical model for quantitatively deducting distraction factors.How-ever,a mathematical model cannot describe the change in tendency during different stages when building a regression model.Subsection regression was used to divide data into sections to assist in the use of a mathematical model to con-duct regression analysis.The dividing point of the regression model was the turning point for the change in tendency of deformation data.The selection of this dividing point can influence model quality.This study used ground tilt ob-servation data from horizontal pendulums at the Jinghe and Korla stations as the dependent variable and meteorologi-cal factors as the independent variable.The tendency change of deformation data was divided into several parts and correlation coefficients were calculated.Scatter diagrams were created to test the results with the model.The results indicated that air and ground temperature were the main distractions for the fixed-point deformation of the horizontal pendulums at the Jinghe and Korla stations.The relationship between meteorological factors and deformation data strengthened existing knowledge regarding deformation observations.The linear correlation of meteorological factors and deformation data was strengthened after deducting the change in tendency.Therefore,the change in tendency may have been caused by regional stress changes according to the study on deformation data from the Sichuan-Yun-nan rhombic block and the anomalies observed before the Xinyuan,Hejing earthquake of M S 6.6 in Xinjiang by Sun Yi and Wang Zai-hua.Subsection regression may be the most efficient method to reduce data processing difficulty be-cause it improves performance of the regression method.