Using the methods of time series spectral analysis and Kalman filter, this article discussed the additive problems of two stochastic processes, mainly Auto Regression Moving Average (ARMA) processes.

本文利用时间序列谱分析和卡尔曼滤波的方法讨论了两个随机过程，主要是自回归滑动平均(ARMA)过程，的叠加问题。

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Instead of using the homomorphic filter which is used to get rid of multiple noise and is a biased estimator, this algorithm translates speckle into locally stationary additive white noise.

该算法不同于有偏的去除乘性噪声的同态滤波算法，而是将噪声转化为局部平稳的加性白噪声。

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When used in medical, the additive can be properly increased, or obey doctor's advice, then is packaged with general filter tip after drying, having the using state like the normal cigarette.

医用可适当加大添加剂，也可遵医嘱。干燥后加装常规过滤嘴后包装。其使用状态如常规烟相同。

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