中文说明：此计划是关于带通巴特沃斯薄膜，因为遗传算法是通过这些过程演变而来的
English Description：
this program is about band pass butterworth fil for The GA evolves by the processes of crossover and mutation, which are shown in Fig. 6. In each generation, half of those individuals with higher fitness values survive, and the others are extinguished. Two parents are selected from the survived individuals, and children are generated by a two-point crossover. In a two-point crossover, the chromosomes of parent1 and parent2 are separated and connected at two random positions, and the individual child with the new chromosome is generated. Here, the number of generated children is the same as that of extinguished individuals; therefore