进行单中心DLA模型的模拟， 至少用两种方法计算模拟

得到的DLA图形的分形维数,要求:(1)编写计算分形维

数的程序 (2)对每种方法都作出双对数图。-Single center DLA model simulation, simulation of at least two ways to calculate the fractal dimension obtained DLA graphics requirements: (1) the preparation of computing fractal dimension of the program　(2) for each method to double logarithmic graph .