Through collecting vibration signal and analyzing it in the frequency domain in the condition of changing parameter cutting, a single self power spectrum is hard to detect tool breakage effectively.

在变切削参数的加工工况下，通过对振动信号的采集和频域处理，发现采用单一的自功率谱方法难以有效检测出刀片破损。

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The auto power spectrum of phase function commonly has two extreme frequencies, and the corresponding frequency components decide the peak characteristics of phase function.

相函数的自功率谱一般具有两个峰值频率，其相应的频率分量决定相函数的波峰特征。

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Using frequency spectrum analysis of phase function to calculate its auto power spectrum can reflect its frequency structure.

利用相函数的频谱分析求其自功率谱，可以反映它的频率结构。

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In its briefing, the DOJ made its case that the nation's two largest carriers currently hold market power, which is due to the heavy concentration of lower frequency spectrum (below 1, 000MHz) allocated to the two incumbents.

ENGADGET

Broadcom and Atheros say that making the interface information public would be illegal, because it could allow users to change the parameters of a chip in ways that violate the rules for using unlicensed spectrum (for example, by increasing its power or changing its operating frequency).

ECONOMIST: Wireless broadband