This fascinating experiment showed that plants not only detect and react to specific wavelengths of light, plants can also detect and react to changes in the ratio of one wavelength to another.
这个有趣的实验表明，植物不仅能探测和对特定波长的光产生反应，还能探测不同波长比率的变化并对其做出反应。
But when the ratio became 3:4 (9 versus 12), the fish showed no indication that they could detect a difference.
但是当比率变为3：4(9对12)，没有迹象表明它们察觉到不同。
Objective to detect laryngeal diseases early by studying the relative signal-to-noise ratio changes in the early pathologic voice.
目的通过研究早期病理嗓音的相对信噪比变化，寻找检测早期喉疾病的方法。
In order to analyze the theoretical model for relative acoustic-to-seismic coupling ratio method to detect land-mine, an experimental system for acoustic landmines detection was developed.
为了分析基于相对声-地震耦合率法探测地雷的理论模型，设计了一个声波探雷实验系统。
Simulating experimental results shown the algorithm is especially suited for surveillance system of low frame rate and can detect the point targets with signal to clutter ratio equal to 2.
模拟实验表明，该算法特别适用于低帧率的红外警戒系统，可检测信杂比为2的点目标。
The algorithm is suited especial for surveillance system of low frame rate and can detect the point targets with signal to clutter ratio equal to 1.
该算法特别适用于低帧率的红外警戒系统，可检测信杂比为1的点目标。
UWB SAR works usually in low Signal-to-Clutter Ratio (SCR) conditions in order to detect targets hidden in forest or buried in ground.
超宽带合成孔径雷达（UWB SAR）为了探测隐藏在树林中或埋于地下的目标，通常工作在低信杂比的环境中。
Based on element local frequency change ratio method and element modal strain energy ratio method, numerical study is carried on to detect the damage of the bridge.
利用单元局部频率变化率法和单元模态应变能比法，对连续梁桥进行了损伤诊断的数值模拟研究。
Objective to detect the onset of motor unit action potential (MUAP) when the EMG signal has poor signal to noise ratio (SNR).
目的检测肌电信号在低信噪比时运动单位动作电位的发放。
High image space resolution ratio can help MRI detect tiny subject and it's not easy to ignore tiny focus and avoid ignoring diagnostics and wrong diagnostics.
高的空间分辨率容易检测出微小的物体，在诊断时不易漏掉微小病灶，避免造成漏诊、误诊。
It is not easy to detect moving point targets in low signal-to-noise ratio (SNR) images.
在低信噪比条件下，要从图像中检测出运动的点目标存在着不少困难。
The method of chemical dissolve-to-weigh has often been used to detect yarn blending ratio for a long time.
长期以来，纱线混纺比的检测通常采用化学溶解称重的方法。
This method could not only lay a foundation for further developing rice quality detection system by using image processing technology, but also be used to detect the ratio of other grains.
最小外接矩形计算方法不仅为进一步研究开发基于图像处理技术的稻米外观品质检测系统打下了基础，而且可用于对其他谷物进行粒型检测。
According to the properties of signal and noise, we detect the weak laser pulse signal using the technique of correlation detection to reject noise and enhance signal-to-noise ratio.
根据信号的相关性和噪声随机性的特点，处理信号，抑制噪声，提高信噪比。
Through simulation experiments, it is shown that it behaves more robustly and can detect pitch more accurately at low signal-to-noise ratio.
实验表明，在信噪比较低的情况下，该法也能较精确的检测基音周期。
The proposed changeable sampling ratio processing technology (CSPT) is an effective technique to detect the ratio of modulation of chirp signal.
变采样率处理技术是一种检测线性调频信号调制率有力的处理方法，但剩余多普勒对检测性能的影响十分严重。
Experiments indicate that this method has a high ratio of recognition in a range of cutting condition and even can detect novel tool faults.
实验结果表明，该方法不仅可以在多种切削条件下获得较高的识别率，还可以识别出新的刀具故障。
Experiments indicate that this method has a high ratio of recognition in a range of cutting condition and even can detect novel tool faults.
实验结果表明，该方法不仅可以在多种切削条件下获得较高的识别率，还可以识别出新的刀具故障。
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