A frequency comparator compares the frequency of a reference clock with that of an output clock and outputs a frequency comparison signal.

频率比较器比较基准时钟和输出时钟的频率，并输出频率比较信号。

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We further propose a possible fast hybrid fractal encoding algorithm which combines existing fast search methods, statistical normalization and frequency domain comparison.

接着进一步提出一种可能的快速混合分形编码的算法，该算法将快速搜索方法、统计规范化、频域比较结合起来。

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Methods High-frequency ultrasonic findings in 17 cases with PVNS were analyzed and a comparison between surgical and pathological results was made.

方法分析17例PVNS的高频超声表现，并与手术病理结果进行对照分析。

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By comparison, in high frequency trading, they want speed first and they are willing to live with whatever the power draw is in that co-location center if it gives them an edge.

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