基于H。 263视频编码标准，提出了一种新的采用二级筛选机制的场景自适应编码方案。
Based on analyzing H. 263 recommendation, a new scene adaptive video coding scheme which used two layer filter mechanism was proposed.
为了提高晚电位分析结果的精确度，提高信号噪声比，在HOLTER记录和分析时，采用了“二级筛选”的设计方法。
In order to improve the signal noise ratio and the precision of the analysis, a "two-level sifting" is processed in recording and analyzing VLP by HOLTER.
投资者经常要求在二级市场上能更好地分类和筛选，但这个功能依然没有出现。
Investors have often asked for better sorting and filtering on the secondary market, but this functionality is still not there.
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