说明：  采用密度函数计算CVT胞的尺寸。通常情况下，任意给定的初始数据，并不断密度，无级变速器将包括面积大致相等的细胞。
(CVT_DENSE was an effort to compute a centroidal Voronoi tessellation (CVT) in which there were cells of specified size. Normally, given arbitrary initial data and a constant density, the CVT would comprise cells of roughly equal area. In this case, a modification was made to the CVT iteration, in an attempt to drive the algorithm towards cells of prescribed sizes. The density function used to generate the sample points was dynamically manipulated, to try to force the CVT to exhibit cells of the desired size.)