布朗单一参数四次指数平滑能更好地跟踪时序的非线性变化趋势，达到更好的短期预测效果。
Quartic exponential smoothing method can follow the nonlinear trend of time series better and can also forecast better.
设计了一种基于自适应反步控制的永磁同步电动机非线性速度控制器，采用二阶滤波环节平滑速度指令。
A nonlinear speed controller for permanent magnet synchronous motor based on adaptive backstepping control was designed, which USES second-order filter to smooth the speed reference.
图像平滑处理中，如何在去除噪声的同时完整地保留图像边缘细节一直是非线性滤波算法研究的热点问题。
In the smoothing process of image, it is very important for nonlinear filter to reserve fringe detail of image while filtering noise.
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