FIR 底通和带通滤波器和IIR 底通和带通滤波器，包含优化类的几个简单示例程序，用蒙特卡洛模拟的方法计算美式期权的价格以及基本描述。- Bottom-pass and band-pass FIR and IIR filter bottom pass and band-pass filter, Optimization class contains several simple sample programs, Monte Carlo simulation method of calculating the American option price and basic descr iption.