A calculation strategy for the recovery of density distribution by the shape observations is presented and proved by piecewise linear interpolation method.
采用分段线性插值法，给出了由形状观测离散值反求密度分布的计算方法，并给出了算例。
2
Also, the fitting formula of piecewise parabola interpolation is derived. The error evaluation based on ISO is accomplished for both experiential formula and parabola fitting formula.
导出了分段抛物线插值拟合公式，并对经验公式和抛物线拟合公式均以iso为基准进行了误差评估。
3
In space discretization, a piecewise bilinear interpolation is used. THe integrals over patches are carried out analytically in closed form.