Time-domainreflectometry( TDR): An impulse is transmitted into the loop.
时域反射器（DR）一个脉冲发射给环路。
2
The ultrasonic time-domainreflectometry(UTDR) technique is most useful for the in situ monitoring of fouling under realistic operating conditions.
超声时域反射法在实际操作条件下在线监测膜污染显示出独特的作用。
3
This paper presents the principles of the Raman back-scattering effect based temperature sensing and the OTDR (Optical Time-DomainReflectometry) based positioning.