Results 101 to 110 of about 5,323,059 (392)
Wideband Doppler Frequency Shift Measurement and Direction Discrimination Based on a DPMZM
IEEE Photonics Journal, 2017 A wideband microwave Doppler frequency shift (DFS) measurement approach based on a single dual-parallel Mach–Zehnder modulator (DPMZM) is proposed and experimentally demonstrated.
Wei Chen +7 more
semanticscholar +1 more source
Modulus‐Switchable Miniature Robots for Biomedical Applications: A Review
Advanced Robotics Research, EarlyView.Materials, robot designs, proof‐of‐concept functions, and biomedical applications of modulus‐switchable miniature robots. Miniature soft robots have shown great potential in biomedical applications due to their excellent controllability and suitable mechanical properties in biological environments.
Chunyun Wei, Yibin Wang, Jiangfan Yu
wiley +1 more source
The Journal of Engineering, 2019 The authors report a target separation detection and motion parameter estimation method based on the time-varying autoregressive (TVAR) model. The TVAR model is used to extract the instantaneous Doppler frequencies of multiple targets or scattering ...
Yaolin Zhang +3 more
doaj +1 more source
Extraction of Micro-Doppler Frequency From HRRPs of Rotating Targets
IEEE Access, 2017 Micro-motion dynamics, such as rapid rotation, vibration and spinning motion, impose additional time-varying frequency modulation on the returned radar signals, which is known as the micro-Doppler (m-D) effect.
Xiaoyi Pan +6 more
semanticscholar +1 more source
Hard‐Magnetic Soft Millirobots in Underactuated Systems
Advanced Robotics Research, EarlyView.This review provides a comprehensive overview of hard‐magnetic soft millirobots in underactuated systems. It examines key advances in structural design, physics‐informed modeling, and control strategies, while highlighting the interplay among these domains.
Qiong Wang +4 more
wiley +1 more source
The Effect of Doppler Phenomenon on the Speed of Blood Flow
Al-Khawarizmi Engineering Journal, 2012 This research studying the phenomenon of Doppler (frequency Doppler) as a method through which the direction and speed of the blood cells flows in blood vessels wear measured.
Ghaidaa Abdulrahman Khalid
doaj +2 more sources
Rotational Doppler Effect of Vector Beams
PhotonicsThe optical rotational Doppler effect occurs when vortex beams are scattered by rotating objects and demonstrate the Doppler frequency shifts in scattered beams, which are associated with the optical angular momentum of vortex beams and the relative ...
Hehe Li, Dong Xu, Xinzhong Li
doaj +1 more source
Effect of Hematocrit upon the Shift in Doppler Frequency
Experimental Biology and Medicine, 1971 ConclusionOver a wide range of erythrocyte concentration (10-68 vol%) there is not an appreciable change in the Doppler frequency shift when blood flow conditions and temperature remain constant.
Clarence P. Cain, David D. Michie
openaire +3 more sources
Advanced Sensor Research, EarlyView.Sports‐related traumatic brain injuries (TBIs) remain underdiagnosed, within amateur athletic cohorts. This review critically synthesises recent advancements in AI‐assisted neuroimaging, blood‐based biomarker profiling, wearable biosensing platforms for early detection, injury stratification, and longitudinal surveillance of TBIs.
Daniel Nicol +3 more
wiley +1 more source
High-frequency Doppler ultrasound flowmeter
Archives of Acoustics, 2014 This paper discusses a new Doppler device for measuring blood flow in small vessels. The ultrasound frequency applied is 20M Hz. Two different ultrasound probes were designed with transducer diameters of 0.9 mm and 1.6 mm. The transducers were located at
A. NOWICKI +3 more
doaj