The heart of the device is a nanoelectromechanical resonator-a tiny beam of silicon vibrating at two tones simultaneously. 这台设备的核心是一个纳米机械共振器&一个微小的硅质秤杆同时以两种不同的频率震动。
The current studies of small irregular changes of R-to-R interval, named heart rate variability ( HRV), are focused on observing the influence of autonomic tones on the sinus nodal autonomy. 近年对心电R-R间期的不规则微小变化(简称心率变异性,或HRV)的研究,着重在于观察自主神经系统对窦房结自律性的调控作用。