Two - stage - fitting ( tsf ) method is obtained , which consists of evaluating the function values of regular - grid points by using local weighted least square methods or radial function interpolation , and smoothly and quickly interpolating those points by using multivariate splines . the result is a hyper - surface of c1 or c : continuity 基于上述結(jié)果,提出了h - d空間散亂數(shù)據(jù)超曲面構(gòu)造二步法,第一步應(yīng)用局部最小二乘法或局部徑向基函數(shù)擬合法插補(bǔ)立方體網(wǎng)格點(diǎn)上的函數(shù)值,第二步應(yīng)用多元樣條光滑快速插值計算,使所得超曲面具有c ~ 1或c ~ 2連續(xù)。