计算一维光子晶体的透射特性和反射特性，脉冲响应的相关分析算法并检验，比较了软阈值，硬阈值及当今各种阈值计算方法。- Calculated transmission characteristics and reflection characteristics of the one-dimensional photonic crystals, Related impulse response analysis algorithm and inspection, Comparison of soft threshold and hard threshold and today various threshold calcu