We illustrate the wavelet package analysis that can obtain the time-frequency distribution figure of noise signal, which can be used to define gray-image.

首先对噪声信号进行小波包分解，得到含有待诊断柴油机主轴承间隙故障信息的噪声信号时频分布图，并由此定义图像。

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This article introduces the method of extending noise figure meter HP 8970a measurement frequency range.

本文介绍了扩展噪声系数表hp 8970a测量频率范围的方法。

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I was woken by a loud banging noise around 2.15am. I sat bolt upright in my bed and noticed a tall dark figure standing at the bottom of my bed.

凌晨大约两点一刻的时候我又被一声巨大的砰砰声给吵醒了，我立马直起身子，注意到我床尾处站着一个巨大的黑影。

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Bradley may have been relatively obscure before this summer, but he is 29-0 and making a lot of noise about a rematch, which would figure to be lucrative in the wake of the controversy surrounding the last bout.

FORBES: Manny Pacquaio Can Fight Anyone He Likes, But Boxing Has Bigger Worries

"We all started looking at it to figure out what was going on, and just as quickly there was another wave of noise after the AP denied the story, " Mr. Bliss said.

WSJ: Stocks Notch Strong Finish After Fake Tweet Sends Markets Reeling