Results 281 to 290 of about 240,101 (314)

Non‐monotonic time‐ and frequency‐dependent diffusion kurtosis in the human brain revealed by pulsed and oscillating gradient experiments

Magnetic Resonance in Medicine, EarlyView.
Abstract Purpose To investigate the time and frequency dependence of diffusion kurtosis in the in vivo human brain with pulsed (PGSE) and oscillating gradient spin‐echo (OGSE) experiments over a range of diffusion times and frequencies using high‐performance gradients.
Runpu Hao, Eric Seth Michael, Franciszek Hennel, Klaas Paul Pruessmann   +3 more
wiley   +1 more source

Neural SHAKE: geometric constraints in neural differential equations. [PDF]

J Cheminform
Diamond JS, Lill MA.
europepmc   +1 more source

Image space formalism of convolutional neural networks for k‐space interpolation

Magnetic Resonance in Medicine, EarlyView.
Abstract Purpose Noise resilience in image reconstructions by scan‐specific robust artificial neural networks for k‐space interpolation (RAKI) is linked to nonlinear activations in k‐space. To gain a deeper understanding of this relationship, an image space formalism of RAKI is introduced for analyzing noise propagation analytically, identifying and ...
P. Dawood, F. Breuer, M. Gram, I. Homolya, P. M. Jakob, M. Zaiss, M. Blaimer   +6 more
wiley   +1 more source

Delving into quasi-periodic type optical solitons in fully nonlinear complex structured perturbed Gerdjikov-Ivanov equation. [PDF]

Sci Rep
Yan Z, Li J, Barak S, Haque S, Mlaiki N.
europepmc   +1 more source

Enhanced spectral response in frequency‐dependent diffusion measurements using a linear encoding model

Magnetic Resonance in Medicine, EarlyView.
Abstract Purpose To devise a more comprehensive quantitative representation for spectral encodings in frequency‐dependent diffusion measurements for improved estimation of D(ω). Theory and Methods Whereas a spectral diffusion measurement is typically represented by a Dirac delta function at a single attributed frequency, spectral response is ...
Eric Seth Michael, Franciszek Hennel, Klaas Paul Pruessmann   +2 more
wiley   +1 more source

A study of traveling wave solutions and modulation instability in the (3+1)-dimensional Sakovich equation employing advanced analytical techniques. [PDF]

Sci Rep
Ahmad J, Hameed M, Mustafa Z, Pervaiz F, Nadeem M, Alsayaad Y.   +5 more
europepmc   +1 more source

Uncertainty Quantification for Nonlinear Vibration of Supercritical Drive Shaft With a Dry Friction Damper

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT The supercritical drive shaft is becoming increasingly popular in helicopter transmission system. Dry friction dampers are specially employed to ensure the supercritical shafts crossing the critical speed safely. Due to design tolerances, manufacturing errors and time‐varying factors, the parameters of the damper are inherently uncertain ...
Liyao Song, Meijun Liao, Weifang Chen, Rupeng Zhu, Dan Wang   +4 more
wiley   +1 more source

Synchronizations in Complex Systems Dynamics Through a Multifractal Procedure. [PDF]

Entropy (Basel)
Ghizdovat V, Mirila DC, Nedeff F, Rusu DI, Rusu O, Agop M, Vasincu D.   +6 more
europepmc   +1 more source

Launch Uncertainty Analysis Under Barrel Erosion Using Experiments and Random Matrix Theory

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT The effects of barrel erosion on artillery firing performance have long been a subject of concern, but its effect on launch uncertainty has yet to be investigated. This article explores the influence of barrel erosion on the interior ballistic mechanical properties and launch disturbances.
Chengyuan Guo, Guolai Yang, Liqun Wang, Jianli Ge, Qingle Wu, Hao Guo   +5 more
wiley   +1 more source