改进的三角形上的Goodman-Said插值格式

An improved triangular Goodman-Said interpolation scheme

对文［ Ｇｏｏｄｍａｎ ， Ｓａｉｄ（１９９１）］ 加以改进，使权函数更简单，从而复杂度更低改进后的格式仍然是一阶光滑的，并且算例表明。

The weight functions introduced in the paper [Goodman, Said(1991)] can be improved as simpler forms and the resulting scheme, IGS for short, keeps the C 1 smoothness and has less computation complexity. An example shows that the IGS scheme has better performance than GS in approximating a function.