FIR 底通和带通滤波器和IIR 底通和带通滤波器，基于分段非线性权重值的Pso算法，包括四元数的各种计算。- Bottom-pass and band-pass FIR and IIR filter bottom pass and band-pass filter, Based on piecewise nonlinear weight value Pso algorithm, Including quaternion various calculations.