这是哈工大材料力学上机实验的程序，能够计算出集中力下的弯矩和挠度-This is the mechanics of materials on experiments HIT program, to calculate the concentration of bending moment and deflection under

三次样条插值（简称Spline插值）是通过一系列形值点的一条光滑曲线，数学上通过求解三弯矩方程组得出曲线函数组的过程。-Cubic spline interpolation