Results 81 to 90 of about 11,015,118 (220)

Human In Vivo Validation of Frequency‐Dependent QTI

open access: yesMagnetic Resonance in Medicine, Volume 96, Issue 6, Page 2642-2659, December 2026.
ABSTRACT Purpose The aim of this work is to investigate if q‐space trajectory imaging (QTI) waveforms can be designed to probe QTI metrics at a single centroid frequency under realistic experimental conditions for in vivo human brain imaging. Methods Realistic diffusion encoding waveforms based on double‐rotation gradient waveform and magic‐angle ...
Svenja Niesen   +3 more
wiley   +1 more source

Physical stability of RNA–lipid nanoparticles under agitation, freeze–thaw and accelerated stability testing

open access: yesJournal of Chemical Technology &Biotechnology, Volume 101, Issue 11, Page 2293-2300, November 2026.
Abstract BACKGROUND The choice of excipient is important in enhancing stability of liquid formulations containing lipid nanoparticles (LNPs) used in RNA delivery where the ability to survive unplanned excursions to higher and lower temperature and vibration is an important attribute.
Franz W Laurett Veras   +2 more
wiley   +1 more source

Phase randomisation: a convergence diagnostic test for MCMC [PDF]

open access: yes
Most MCMC users address the convergence problem by applying diagnostic tools to the output produced by running their samplers. Potentially useful diagnostics may be borrowed from diverse areas such as time series.
Rodney C Wolff   +2 more
core  

Numerical Investigation of the Cumulant Expansion for Fourier Path Integrals

open access: yes, 2012
Recent developments associated with the cumulant expansion of the Fourier path integral Monte Carlo method are illustrated numerically using a simple one-dimensional model of a quantum fluid.
Jimmie D. Doll   +11 more
core   +1 more source

Dependence of the Extra‐Cellular Diffusion Coefficient on the Fractions of Neurites and Cell Bodies in Gray Matter

open access: yesMagnetic Resonance in Medicine, Volume 96, Issue 5, Page 2426-2439, November 2026.
Purpose The dependence of the long‐time (tortuosity) limit of the extra‐cellular diffusivity on the intra‐cellular volume fraction is of fundamental importance for microstructure modeling. While such dependencies have been explored for the white matter, the tortuosity limit in gray matter is unknown due to complex cell composition and geometry. Here we
Hong‐Hsi Lee   +6 more
wiley   +1 more source

Cumulant methods and short time propagators

open access: yesThe Journal of Chemical Physics, 1989
The present paper clarifies a number of issues concerning the general problem of constructing improved short time quantum mechanical propagators. Cumulant methods are shown to be a particularly convenient tool for this task. Numerical results comparing methods based on partial averaging and on gradient approaches are presented for simple model problems
Coalson, Rob D.   +2 more
openaire   +3 more sources

Multiuser Channel Estimation from Higher-Order Statistical Matrix Pencil

open access: yesEURASIP Journal on Advances in Signal Processing, 2002
This paper presents a new statistical approach to the blind estimation of linear multiple-input multiple-output (MIMO) channels with finite impulse response.
Liang Jing, Ding Zhi
doaj   +1 more source

Process Optimization of Solution Blow Spinning for Poly (N‐Isopropylacrylamide) Fibers

open access: yesJournal of Applied Polymer Science, Volume 143, Issue 40, October 20, 2026.
Solution blow spinning has emerged as a safe and scalable technique for fabricating thermoresponsive PNIPAM fibers. The influence of key parameters on jet stability and fiber uniformity is determined through both rheological analysis and statistical process optimization. A Box–Behnken design reveals an optimized window for producing PNIPAM fibers below
Maryam Parastar   +2 more
wiley   +1 more source

Automation and Active Learning for the Multi‐Objective Optimization of Antibody Formulations

open access: yesAdvanced Science, Volume 13, Issue 55, 5 October 2026.
Successful antibody formulation necessitates balancing factors such as thermal stability, colloidal stability, and viscosity across a vast excipient design space. This work integrates robotic liquid handling, high‐throughput biophysical characterization, and multi‐objective Bayesian optimization in an iterative closed‐loop Design‐Build‐Test‐Learn cycle.
D. Christopher Radford   +3 more
wiley   +1 more source

CUMULANT APPROACH FOR MODULATION RECOGNITION [PDF]

open access: yes, 2021
In this paper, cumulant approach is used in MQAM modulated signal recognition. This method uses the characteristics of higher-order cumulants and higher-order statistics to identify different kinds of MQAM signals.
TANG BIN   +1 more
core   +1 more source

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