Results 121 to 130 of about 643,838 (299)
, 2018 The delay-Doppler resolution of a radar system determines its ability to separate targets that are spatially close together and have similar radial velocities with respect to the radar.
Liu, I-Fan, Lin, I-Fan
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Klippel‐Trénaunay‐Weber Syndrome: Prenatal Diagnosis and Review of the Literature
Journal of Clinical Ultrasound, Volume 53, Issue 3, Page 535-546, March/April 2025.This meta‐analysis demonstrates the high diagnostic accuracy of SZ‐CEUS for differentiating between malignant and benign focal liver lesions, as well as for HCC from non‐HCC lesions. The study shows better performance for smaller lesions and those with a higher proportion of malignancy.
Giuliana Orlandi +13 more
wiley +1 more source
Journal of Clinical Ultrasound, Volume 53, Issue 3, Page 436-444, March/April 2025.The ultrasound detection rate of the palatine tonsils in children was good. There are characteristic ultrasonic image manifestations. Tonsil ultrasound image quality is affected by individual and local factors. ABSTRACT Objective To explore the ultrasonic image characteristics of palatine tonsils in healthy children and the factors affecting image ...
Ying Cao +5 more
wiley +1 more source
The development of an ultrasonic Doppler bed-load velocimeter
, 1989 Includes bibliography.A instrument has been developed for measuring the velocity of solid particles adjacent to the pipe wall in a solids-liquid pipeline.
Lazarus, Mark Doron
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Processing of CW Doppler images to extract velocity profile [PDF]
, 2012 The present work aims to find a good way to automatically trace the velocity profile in vessels shown in continuous wave Doppler spectrograms, replacing the more traditional manual tracing, easy to perform but rich in drawbacks.
Dainese, Clara
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Journal of Clinical Ultrasound, EarlyView.This case illustrates sequential intracranial occlusions in large‐vessel vasculitis compatible with Takayasu arteritis preserving perfusion through robust collateral pathways. Transcranial color‐coded duplex sonography identified characteristic blunted flow patterns and focal turbulence, underscoring its value in detecting hemodynamic compromise beyond
Maria Júnia Lira e Silva +4 more
wiley +1 more source
Journal of Computer Networks and CommunicationsThe sixth generation (6G) wireless networks are used to provide a large coverage, and also this generation needed to support different emerging applications in harsh areas with higher user equipment mobility.
Ephrem Gelamite Demere +1 more
doaj +1 more source
OTFS Channel Estimation Based on Sparse Bayesian Learning
Shanghai Jiaotong Daxue xuebaoThe acquisition of channel state information (CSI) has a significant impact on the performance of orthogonal time frequency space (OTFS) modulated communication systems.
SUN Fujun, MA Ming, FU Haijun, DAI Jisheng
doaj +1 more source
Joint delay-Doppler diversity for wireless mobile communications
, 2003 Due to the limited resolution of time delay in direct-sequence spread-spectrum system, the RAKE receiver suffers performance degradation if multipath components are unresolvable in time delay.
Chang, Shih-Kung
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, 2009 In this study, tissue Doppler imaging (TDI) was used to assess changes in ventricular function following repair of congenital heart defects. The relationship between TDI indices, myocardial injury and clinical outcome was explored.
Peng, E. +17 more
core +1 more source