说明：   本文基十遗传算法(CA)理论，对基本遗传算法作了一些改进和补充，并 在给定技术指标的前提下，利用改进的遗传算法直接设计FIR, IIR数字滤波器， 取得了较好的设计效果。全文分为五章。
( A modified genetic algorithm (GA) is proposed and its applications are studied in this thesis. Applications of genetic algorithm with guiding strategy in the design of digital filter (FIR DF, IIR DF) are also addressed. )