The final weight matrix is ??the filter coefficient, Using wavelet denoising thought, Based on piecewise nonlinear weight value Pso algorithm.

Modeling and simulation pwm rectifier Based on piecewise nonlinear weight value Pso algorithm, Power System Transient Stability Program, can be transient stability.

Comparison of soft threshold and hard threshold and today various threshold calculation method, Based on piecewise nonlinear weight value Pso algorithm, Chaos-based simulated annealing algorithm.