Doppler Effect Solved Problems Two trains A and B are moving toward each other at a speed of 432 km/h. If the frequency of the whistle emitted by A is 800 Hz, then what is the apparent frequency of the whistle heard by the passenger sitting in train B. (The velocity of sound in ai...
Sample Problems: (1) If a ground radar operating at 10 GHz is tracking an airplane flying at a speed of 500 km/hr tangential to it (crossing pattern) at a distance of 10 km, what is the Doppler shift of the returning signal? Answer: Since the closing velocity is zero, the Doppler i...
Ahmad U,Sik C W,et al.Sample fraction&Doppler effect compensation algorithm for acquisition of weak GPS signals.Proceedings of the 2011 International Technical Meeting of The Institute of Navigation. 2011Ahmad U,Sik C W. Sample fraction & Doppler effect compensation algorithm for acquisition of ...
Effect of Sample Volume Location on Doppler-derived Transmitral Inflow Velocity Values in 288 Normal Subjects 20 to 80 Years Old: An Echocardiographic, Two... Effect of sample volume location on Doppler-derived transmitral inflow velocity values in 288 normal subjects 20 to 80 years old: an ...
The calculated Doppler effects of the W and ThO 2 samples agreed with the measured values within the experimental error, while the calculation overestimated the measured Doppler effect of the Er sample by 12%. 展开 关键词: A0100 E0500 F0700 T0700 T1000 DOI: 10.1016/S0022-3115(03)00144-2...
But they did not report whether the sample size was large enough to detect this difference with the usually required power of at least 80%. Therefore the question remains whether obstetrical management should be changed in view of these results. Additionally, a clinically useful estimate is needed...
Receiving the A / D sampling the input signal, prior to demodulation, so as to compensate for the Doppler effect of the input signal, the receiver includes a controller for shifting the sampling digital signal. By shifting the sampling digital signal to omit one sample period n for each sampl...
Okajima, S., et al.: Resonance interaction effect be- tween hot sample and cold core in analysis of Doppler effect measurement, J. Nucl. Sci. Technol., 31[10], 1097 (1994).Okajima S, Oigawa H, and Mukaiyama T, `Resonance Interaction Effect between Hot Sample and Cold Core in ...
Doppler velocimetry was first applied to the fetal arteries in 1977 by McCallum [1], who used for the first time the continuous wave Doppler effect in order to obtain flow velocity in the umbilical artery after delivery. In the same year, Fitzgerald and Drumm [2] used pulsatile Doppler to...
the drilling process inherently induces cracks and fissures along the borehole wall and under normal conditions this does not pose any problems for the drilling operations. However when the stresses induced by drilling are too high, the fissures may open up and cause an unwanted influx/efflux of...