圆形packing之计算总势能：总势能等于所有圆饼势能之和，而各圆饼的势能又等于该圆饼和圆盘以及其他圆饼之间的挤压挤压势能之和。挤压势能又等于他们之间的挤压深度的平方。所以可以通过分解问题使得复杂的问题简单化-The calculation of the total potential energy circle packing: the total potential energy potential energy is equal to the sum of all the pie, and