Results 101 to 110 of about 20,191 (260)
Catheterization and Cardiovascular Interventions, EarlyView.ABSTRACT Index of microcirculatory resistance (IMR) is a cutting‐edge, wire‐based tool that advances the capability assessment of coronary microvascular function. By utilizing distal coronary pressure and mean transit time under maximal hyperemia, IMR delivers consistent, reproducible insights into the microvasculature's dynamic health.
Joanna Sohn +10 more
wiley +1 more source
Analysis of Doppler frequency shift response mechanism based on OFDM system
MATEC Web of Conferences, 2018 OFDM system is widely used in mobile communication because of its high spectral efficiency and strong anti-multipath capability. However, in high dynamic scenarios, the Doppler shift between the transmitter and the receiver destroys the orthogonality ...
Li Ke +3 more
doaj +1 more source
Deep Underground Science and Engineering, EarlyView.Fluid flow through a single fracture is commonly described by the cubic law. However, deviations from this model are expected because natural fracture surfaces are rough and in contact with each other in discrete regions. In this study, the interactions between fracture closure, contact area, and hydraulic characterization of mesoscopic‐scale rough ...
Chenghao Han +5 more
wiley +1 more source
Joint estimation of target time delay and Doppler frequency in passive radar system
Tongxin xuebao, 2015 A novel method of joint estimation of time delay and Doppler shift in passive radar system based on short-time fractional Fourier transform (STFRFT) was proposed.Firstly,the mathematical expression of the STFRFT time-frequency resolution was studied for ...
ANGPeng W +3 more
doaj +2 more sources
Radar target micro-doppler signature classification
, 2008 This thesis reports on research into the field of Micro-Doppler Signature (μ-DS) based radar Automatic Target Recognition (ATR) with additional contributions to general radar ATR methodology.
Smith, G.E.
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ESC Heart Failure, Volume 12, Issue 2, Page 888-899, April 2025.Abstract Aims Heart failure with preserved ejection fraction (HFpEF) continues to be an increasingly common health problem associated with a high mortality rate. Elevated levels of Growth differentiation factor‐15 (GDF15) and N‐terminal pro‐brain natriuretic peptide (NT‐proBNP) are reportedly associated with poor clinical outcomes in a broad range of ...
Yoichiro Otaki +11 more
wiley +1 more source
Heterodyne frequency shift laser doppler anemometer
, 1997 Laser Doppler anemometry is a non-intrusive method for the study of flow processes by measuring the velocity of tracer particles carried in the flow.
Dopheide, D. +4 more
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Measurement of Doppler Frequency Shift of VHF Radar Echoes from Meteor Trails [PDF]
, 1987 306-312A procedure for computing the Doppler frequency shift of the 54.95 MHz carrier under the meteor radar echo envelope of pulse width 280 μs is described. The special requirement of the procedure is to compute the Doppler shift which is in the range -
Reddi, C Raghava +2 more
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ESC Heart Failure, Volume 12, Issue 2, Page 1256-1270, April 2025.Abstract Background and aims The heart is a metabolic organ rich in mitochondria. The failing heart reprograms to utilize different energy substrates, which increase its oxygen consumption. These adaptive changes contribute to increased oxidative stress.
Qinghong Li +12 more
wiley +1 more source
, 2001 Background: Although behavioural treatment (biofeedback) successfully treats the pelvic floor abnormalities in patients with idiopathic constipation, many patients also normalise their impaired bowel frequency.
Emmanuel, A.V., Kamm, M.A.
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