PF,EPF,UPF的对比仿真代码，可以很直观的看出各种算法之间的差别及各自的优缺点。可直接运行。-PF, EPF, UPF contrast simulation code, it is intuitive to see the differences between the various algorithms and their respective advantages and disadvantages. Can be directly run.

EPF方法对数据的方真拟合，效果比较好。有研究学习EPF的价值。-EPF square true method of data fitting, results were better. Studies have to learn the value of EPF.

EPF的程序，权值的计算可能有所不同，但是效果一样。-EPF procedures, the calculation of weight may be different, but the effect is the same.