Results 131 to 140 of about 201,531 (312)

A NEW DISCRETE HARTLEY TRANSFORM PRECODING BASED INTERLEAVED-OFDMA UPLINK SYSTEM WITH REDUCED PAPR FOR 4G CELLULAR NETWORKS [PDF]

Journal of Engineering Science and Technology, 2011
High peak-to-average power ratio (PAPR) reduction is one of the major challenges in orthogonal frequency division multiple access (OFDMA) systems since last decades. High PAPR increases the complexity of analogue-to-digital (A/D) and digital-to-analogue (
VARUN JEOTI, IMRAN BAIG
doaj  

A Single-Phase Bidirectional AC/DC Converter for V2G Applications

Energies, 2017
This paper presents a single-phase bidirectional current-source AC/DC converter for vehicle to grid (V2G) applications. The presented converter consists of a line frequency commutated unfolding bridge and an interleaved buck-boost stage.
Tao Peng, Peng Yang, Hanbing Dan, Hui Wang, Hua Han, Jian Yang, Hao Wang, Hui Dong, Patrick Wheeler   +8 more
doaj   +1 more source

Analysis of Upper Airway Morphology Using Four‐Dimensional Dynamic MRI With Active Deep Learning‐Based Automatic Segmentation

Journal of Magnetic Resonance Imaging, EarlyView.
ABSTRACT Background Upper‐airway morphology changes during breathing can be captured with cine 4D MRI. Active‐learning nnU‐Net reduces manual labeling while maintaining accuracy. Purpose For automatic upper airway segmentation on free‐breathing cine 4D MRI using active learning and quantifying dynamic changes under two mouth positions.
Cheng‐Yang Yu, Meng‐Chen Chung, Yunn‐Jy Chen, Han‐Wei Wang, Jonathan X. Zhou, Shih‐Lung Chen, Kevin T. Chen, Tiffany Ting‐Fang Shih   +7 more
wiley   +1 more source

Comparison of Single‐Breath and Multi‐Breath Xe‐MRI in the Longitudinal Assessment of Treatment in Children With Cystic Fibrosis

Journal of Magnetic Resonance Imaging, EarlyView.
ABSTRACT Background Elexacaftor/tezacaftor/ivacaftor (ETI) is a current standard therapy for pediatric cystic fibrosis (CF). Multiple‐breath washout 129Xe MRI (MBW Xe‐MRI) is improved following 1 month of treatment. However, the utility of MBW Xe‐MRI over extended ETI treatment and its comparison to single‐breath Xe‐MRI and pulmonary function tests ...
Faiyza S. Alam, Samal Munidasa, Brandon Zanette, Daniel Li, Sharon Braganza, Felix Ratjen, Giles Santyr   +6 more
wiley   +1 more source

Quantitative Real‐Time MRI for the Assessment of Gastric Motility

Journal of Magnetic Resonance Imaging, EarlyView.
ABSTRACT Background Current reference standards for measuring gastric emptying and motility are not considered optimal due to the time required, ionizing radiation, invasiveness, and spatial resolution. Purpose To assess gastric motility using novel real‐time dynamic magnetic resonance imaging in combination with static measurements for gastric ...
Lydia Neubauer, Leonie Forstreuter, Fabian Winter, Fiona Mankertz, Mark O. Wielpütz, Donata S. Grajecki, Antje Steveling, Ali A. Aghdassi, Sebastian Zeißig, Matthew D. Blackledge, Dirk Voit, Jens Frahm, Susanne Schnell, Werner Weitschies, Linus Großmann   +14 more
wiley   +1 more source

Approaches to Computed Tomography Education for Radiography Students

Journal of Medical Radiation Sciences, EarlyView.
The aim of this narrative review was to explore the current published literature relating to CT teaching methods and assessment of diagnostic radiography students during university training. Existing CT education evaluations focus on student satisfaction and usability of tools, with post‐lesson knowledge gains reported. Future work should shift towards
Yobelli Alexandra Jimenez, Frances Gray, Minh Chau, Franziska Jerjen, Adrian Repole, Dania Abu Awwad   +5 more
wiley   +1 more source

A non‐isolated symmetrical design of voltage lift switched‐inductor boost converter with higher gain and low voltage stress across switches

IET Power Electronics, EarlyView., 2022
The article discusses the novel topology with high gain and low voltage stress DC‐DC converter based on switched‐capacitor and switched‐inductors for fuel cell and PV applications. The converter performance is analyzed and verified with the hardware prototype (22/400V, 50kHz).
Md Samiullah, Marif Daula Siddique, Atif Iqbal, Pandav Kiran Maroti, Subrata Banerjee   +4 more
wiley   +1 more source

Single‐Shot Full‐Stokes Analysis of Partially‐Polarized Light With a Photonic Deep Random Neural Network

Laser &Photonics Reviews, EarlyView.
Photonic neural networks are emerging as a powerful tool for analyzing light. The article reports a photonic deep random neural network that performs single‐shot low‐latency measurements of the state and degree of polarization with high accuracy. Using only a stack of glass diffusers on top of a small camera sensor, this neuromorphic polarization ...
Alessandro Petrini, Claudio Conti, Davide Pierangeli   +2 more
wiley   +1 more source

Overlap-Kernel EPI: Estimating MRI Shot-to-Shot Phase Variations by Shifted-Kernel Extraction From Overlap Regions at Arbitrary k-Space Locations. [PDF]

Magn Reson Med
ABSTRACT Purpose In multi‐shot EPI, shot‐dependent phase fluctuations can introduce ghost artifacts, undermining advantages for enhancing resolution or reducing distortion, particularly in diffusion scans. Here, a novel self‐navigation strategy based on shift‐invariant kernel extraction is proposed, enabling robust estimation of phase inconsistencies ...
Tian R, Uecker M, Zaitsev M, Scheffler K.   +3 more
europepmc   +2 more sources

Fast Simulation of Wide‐Angle Coherent Diffractive Imaging

Laser &Photonics Reviews, EarlyView.
The propagation multi‐slice Fourier transform method is introduced as an accurate and efficient approach for describing light scattering for arbitrarily shaped objects. Its exceptional suitability for simulating coherent diffractive imaging of nanoparticles in the XUV and soft X‐ray range is demonstrated.
Paul Tuemmler, Julia Apportin, Thomas Fennel, Christian Peltz   +3 more
wiley   +1 more source