您要查找的是不是：
- ventricular amplitude ratio 心室振幅比值
- The amplitude ratio of the photoplethysmography waveform of red light and infrared light varies with the oxygen saturation of blood. 脉搏血氧仪具有连续、无创、快速、准确监测人体动脉血氧饱和度和心率的功能，现已在临床上发挥重要作用[1]。
- DSMT4 function can be presented either by the single Nyquist diagram( a polar plot) or by plots of the amplitude ratio and the phase angle against the input(forcing) frequency. 在绘图时通常幅值（比）用分贝表示，相角用度表示，输入信号的频率按常用对数取值。
- In Meniere's disease ears,SP/AP amplitude ratio was positively correlated to pure tone thresholds (?r?= 0.560 1 ?P?< 0.01 ). An elevated SP/AP ratio was found in 73% of the Meniere's ears and 6% of the SNHL ears. 梅尼埃病组 SP/ AP比值与主观纯音听阈呈正相关 (r =0 .;5 6 0 1;P <0
- luminance-chrominance amplitude ratio 亮度彩色信号幅值比
- amplitude ratio of 2T sine squared pulse and bar 2T正弦平方脉冲与条脉冲幅度比
- relative frequency amplitude ratio 相对频率幅值比
- Applicability of regional P/S amplitude ratios for the discrimination of low-magnitude seismic events was tested and proved using earthquakes and explosions in Central Asia. 摘要基于中国新疆及中亚地区大量天然地震和地下爆炸，检验了较大震级情况下得到的区域P/S震相幅值比识别判据对低震级地震事件的适用性。
- Study on geomagnetic anomalies in amplitude ratio before earthquake 震前地磁幅值比异常研究
- Sound waves are measured by their amplitude. 声波是根据其振幅来测量的。
- Primary discussion on coda amplitude ratio, time-entropy and its application 尾波振幅比、时间熵及其应用的初步探讨
- The amplitude or loudness of a sound. 音量声音的响度或强度
- Plain distribution of the amplitude ratio before the M7.8 Tangshan earthquake 唐山7.;8级地震前振幅比的平面分布
- The ratio of students to teachers is 35:1. 学生和老师的比率是三十五比一。
- Variation of amplitude ratio with time before the M7.8 Tangshan earthquake 唐山7.;8级地震前振幅比随时间的变化
- The ratio of schoolboys to schoolgirls is 2 to 1. 男学生和女学生的比例是2比1。
- Men outnumber women here in the ratio of three to one. 此地男子数量以三比一超过女子。
- By their comprehensiveness and amplitude these picture fille the imagination. 这些照片以其综合性和丰富而充满了想像力。
- The first or last term of a ratio or a series. 首项，末项比率或数列中第一个或最后一个项
- There is progressive ventricular dilatation. 渐进发展的脑室扩大。
