Results 91 to 100 of about 6,746,316 (343)
Time-Frequency Analysis of Sjöstrand’s Class
Revista Matemática Iberoamericana, 2006 We investigate the properties an exotic symbol class of pseudodifferential operators, Sjöstrand's class, with methods of time-frequency analysis (phase space analysis). Compared to the classical treatment, the time-frequency approach leads to striklingly simple proofs of Sjöstrand's fundamental results and to far-reaching generalizations.
openaire +6 more sources
Pediatric Blood &Cancer, EarlyView.ABSTRACT Background Gastrointestinal graft‐versus‐host disease (GI GVHD) following hematopoietic stem cell transplant is typically managed with medical therapy, but surgery and angioembolization may be warranted in selected cases with life‐threatening complications.
Gaia Brunetti +12 more
wiley +1 more source
A Time–Frequency Domain Analysis Method for Variable Frequency Hopping Signal
SensorsA variable frequency hopping (VFH) signal is a kind of frequency hopping (FH) signal that varies both in frequency and dwell time. However, in radio surveillance, the existing methods for unidentified signals using VFH cannot be effectively handled.
Zhengzhi Zeng +3 more
doaj +1 more source
Application of time-frequency spectral analysis methods
Trudy Odesskogo Politehničeskogo Universiteta, 2015 In this article the limited application of the non-stationary signals spectra classical analysis using the Fourier transform is substantiated. It is shown that Fourier transform has benefits at periodic signals analysis and limitations when non ...
Yuriy K. Filipsky +2 more
doaj +1 more source
An Efficient Forecasting Approach to Reduce Boundary Effects in Real-Time Time-Frequency Analysis [PDF]
, 2021 Adrien Meynard, Hau‐Tieng Wu
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Time-frequency analysis of locally stationary Hawkes processes
, 2017 Locally stationary Hawkes processes have been introduced in order to generalise classical Hawkes processes away from stationarity by allowing for a time-varying second-order structure.
Roueff, François, Von Sachs, Rainer
core
Time-frequency analysis of ship wave patterns in shallow water: modelling and experiments
, 2018 A spectrogram of a ship wake is a heat map that visualises the time-dependent frequency spectrum of surface height measurements taken at a single point as the ship travels by.
Binns, Jonathan R. +4 more
core +1 more source
Therapeutic Apheresis and Dialysis, EarlyView.ABSTRACT Objective To compare the efficacy and safety of roxarestat versus recombinant human erythropoietin (rhEPO) in the management of renal anemia in patients undergoing maintenance hemodialysis. Methods This was a prospective, open‐label, randomized controlled trial.
Lingling Chen, Junjie Zhu, Qiaonan Ge
wiley +1 more source
Therapeutic Apheresis and Dialysis, EarlyView.ABSTRACT Introduction Bloodstream infections due to repeated vascular access (VA) puncture and circuit connections remain major concerns in hemodialysis. Therefore, we examined current practices for glove, disinfectant, and personal protective equipment (PPE) use according to VA type in national university hospitals in Japan.
Aiko Yamada +6 more
wiley +1 more source
Time-Frequency Analysis and Its Applications to Multimedia Signals [PDF]
, 2022 Sridhar Krishnan +3 more
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