To get high quality quartz tuning forks, mechanical coupling error and frequency excursion by machining errors must be resolved.

加工高质量的石英音叉需要解决工艺误差导致的机械耦合误差及频率漂移等问题。

youdao

At present, proximity high frequency RFID (Radio frequency Identification) system based on inductive coupling load modulated technology is used worldwide.

目前，国内外广泛应用的RFID系统是基于感应耦合负载调制技术的近距离高频读写系统。

youdao

On the basis of the principle of range-Doppler coupling of linear frequency modulation signal, a new method of radial velocity estimation for high coupling coefficient is presented.

本文在分析了线性调频信号距离—多普勒耦合原理的基础上，提出了一种高耦合系数条件下径向速度估计的新方法。

youdao