Trent reverse reflection device is adopted to offset the effect caused by beat and cross sliding during displacement or vibration and to enhance measurement sensitivity and accuracy nearly one time.

采用特伦逆向反射装置，消除它在位移或振动过程中因偏摆或横移所带来的影响，使测量灵敏度和精度提高约一倍。

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The range measurement of the FMCW radar is based on the estimation of the frequency of the beat-note signal.

为了提高FMCW雷达的距离测量精度，提出了一种基于差拍信号相位的距离估计方法。

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To improve the range measurement accuracy a range estimation method for FMCW level radar based on the phase of the FFT of the beat-note signal is presented.

为了提高FMCW雷达的距离测量精度，提出了一种基于差拍信号相位的距离估计方法。

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They quantify your stress level by calculating your heart rate and the minute variations in the time between each beat, a measurement known as heart rate variability (HRV), which has been used to gauge the likelihood of mortality after a heart attack and to help assess certain psychiatric conditions.

WSJ: Keep Calm and Carry a Gizmo

While there are many heart rate apps available, Inner Balance is monitoring heart rate variability (HRV) - a measurement of beat-to-beat changes that occur within heart rhythms and a sophisticated and highly sensitive observation of emotional fluctuations.

ENGADGET: HeartMath unveils Inner Balance iOS app and sensor for managing stress, clearing the mind

"Besides life-saving applications in fire and rescue, the potential to record dynamic scenes of a human body could have a variety of other biomedical uses including studying or monitoring breathing, cardiac beat detection and analysis, or measurement of body deformation due to various stresses during exercise, " Ferraro says.

ENGADGET: Infrared holography lets rescuers see people through walls, fire, walls of fire (video)