路基沉降观测空间插值及其精度分析  

Space Interpolation and Precision Analysis of Subgrade Subsidence Monitoring Data

作　　者：王丽 WANG Li(Faculty of Environment and Surveying Engineering,Suzhou University,Suzhou 234000)

机构地区：[1]宿州学院环境与测绘工程学院,安徽宿州234000

出　　处：《阴山学刊（自然科学版）》2018年第2期20-22,共3页Yinshan Academic Journal(Natural Science Edition)

基　　金：2016年宿州学院横向项目(2016hx007);2016年宿州学院重点科研项目(2016yzd01)

摘　　要：利用高铁某段路基沉降观测数据,对其进行空间插值,获取等时间间隔的沉降观测数据,为后续小波分析,数学建模分析奠定基础.通过三次样条函数插值方法和线性函数插值方法,分别获取时间间隔为1天的沉降观测数据.插值结果表明,线性插值方法获取的插值曲线图比三次样条函数插值方法获取的插值曲线图平滑,获取数据奇异点较少,图形连续性好,插值精度较高.路基沉降观测数据,线性插值效果比三次样条函数插值效果好,选用线性插值获取的数据作为后续分析研究对象.Space interpolation based on subgrade of highway subsidence monitoring data,attempted to get subsidence monitoring data of equal time intervals,laid the foundation of wavelet analysis and mathematical modeling.By cubic spline function and linear function,obtained the subsidence monitoring data of interval 1day.Interpolation results show that curve of linear interpolation is smoother than the cubic spline function interpolation,singular point is less,continuity of curve is better,accuracy of space interpolation is higher.Therefore,linear interpolation was used to research.

关 键 词：三次样条函数插值 线性函数插值 等时间间隔 

分 类 号：O29[理学—应用数学] P258[理学—数学]