保证准确无误，是学习通信的好帮手，FIR 底通和带通滤波器和IIR 底通和带通滤波器，验证可用，时间序列数据分析中的梅林变换工具，本程序的性能已经达到较高水平。- Ensure accurate communication is learning a good helper, Bottom-pass and band-pass FIR and IIR filter bottom pass and band-pass filter, Verification is available, Time series data analysis Mellin transform tool, The performance of the program has reached a high level.