说明：  多小区、多用户蜂窝小区的建模。其中每个小区内设置一个基站，以基站为圆心，以一定半径在基站附件分布n个用户。可直接运行
(Modeling of multi-cell and multi-user cellular cell. A base station is set up in each cell, with the base station as the center, and N users are distributed in the base station accessories with a certain radius. Direct operation)