The advantage of this method is that it doesn't require locating accurately the end point of QRS wave of HRECG and overcomes low resolution of frequency-domain analysis.
并且克服了时域法要求对QRS 复合波的起点和终点准确定位不易的缺点，以及频域分析法频率分辨率不足的缺陷。
In STFT is window is of finite length, and we no longer have perfect frequency resolution.
快速傅立叶变换用到的窗宽度长度有限，因此不能获得完美的频率分辨率。
The second part of the lexicon consisted of 13,060 characters and their frequency of usage (Tsai, 1996b). Character frequency was used in the last ambiguity resolution rule.
字典的第二部份由13060个汉字及它们的使用频率组成（Tsai,1996b），汉字的频率在最后一个歧义消除规则之中使用。
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