Principles and performances of quantum stochastic filters are studied for nonlinear time-domain filtering of communication signals.

针对通信信号的非线性时域滤波问题，研究了量子随机滤波器的原理和性能。

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The paper presents a method of motion curve frequency domain filtering in Omni-directional M-mode echocardiography images based on Discrete Fourier Transform (DFT).

介绍一种基于离散傅里叶变换(DFT)的全方向M型超声心动图运动曲线频域滤波技术。

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Low level image processing is the base of localization. The paper discusses time domain filtering and frequency domain filtering according to the noise disturbance in the surrounding images.

低层视觉图象处理是视觉定位的基础，针对环境图象存在噪声干扰的特点，文章分别从时域和频域上分析了图象滤波的方法。

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Unlike some filtering systems, it works on a page by page basis rather than an entire domain.

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