The grey level processing in a sampling window is a very important method for image transforming.
窗口灰阶处理是一种具有重要意义的图象变换方法。
By using MATLAB signal and using window method, frequency sampling and Chebyshev approximation the design of low pass digital filter in the toolbox have been processed.
采用窗函数法、频率抽样法和切比雪夫最佳一致逼近法，通过调用Matlab信号处理工具箱中的函数设计低通数字滤波器。
Sliding window is often used as a sampling method for query processing and obtaining approximate answers over data stream.
滑动窗口是对数据流进行连续查询处理、得出近似查询结果的一种常用的数据采样技术。
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