Results 141 to 150 of about 97,564 (280)

Spatially resolved 23Na magnetic resonance dispersion measurement in porous media

The Canadian Journal of Chemical Engineering, EarlyView.
Quantitative 23Na MRI was employed to analyze dispersion in realistic core plug samples and was compared with the conventional breakthrough curve. 23Na MRI provided a more effective aassessment of core plug heterogeneity than the conventional method. Abstract Tracer tests are widely used in the petroleum industry to assess reservoir core plugs, relying
Rheya Rajeev, Mohammad Sadegh Zamiri, Andrés Ramírez Aguilera, Florea Marica, Laura Romero de Zerón, Bruce J. Balcom   +5 more
wiley   +1 more source

INCREMENTAL HARMONIC BALANCE METHOD FOR THE STUDY OF SUPPORT LOOSENESS FAULT’S CHARACTERISTICS

Jixie qiangdu, 2015
To a Jeffcott rotor system with support looseness fault,a vibration differential equation with piecewise-linear stiffness was established by considering the system with one-side support looseness and the rotor with unbalanced extraneous exciting force ...
CAO QingSong, XIANG Qin, XIONG GuoLiang
doaj  

Power Optimization and Control for ELITE Based on Robust PWA Multiplexed MPC and Differential Evolution

Space: Science & Technology
The extremely low Earth imaging and technology explorer (ELITE), a very low Earth orbit (VLEO) satellite, is expected to face increasingly high-power demands from its electrical propulsion system, due to significant atmospheric drag, and its attitude ...
Xiaohua Zhang, Lance Gregorie Balansag Talam, Keck Voon Ling, Wenhe Liao, Wee Seng Lim, Zhengliang Lu, Xiang Zhang   +6 more
doaj   +1 more source

A‐optimal model‐based design of experiments for processes with uncertain inputs

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract Model‐based design of experiments (MBDoE) techniques are tools for selecting experimental conditions that enable accurate parameter estimation for mechanistic models. Most MBDoE approaches assume that the selected experimental conditions will be implemented perfectly, without uncertainties in the independent variables.
Bright Ofori, Iman Moshiritabrizi, Anh‐Duong Vo, Kimberley B. McAuley   +3 more
wiley   +1 more source

Bayesian inverse ensemble forecasting for COVID‐19

Canadian Journal of Statistics, EarlyView.
Abstract Variations in strains of COVID‐19 have a significant impact on the rate of surges and on the accuracy of forecasts of the epidemic dynamics. The primary goal for this article is to quantify the effects of varying strains of COVID‐19 on ensemble forecasts of individual “surges.” By modelling the disease dynamics with an SIR model, we solve the ...
Kimberly Kroetch, Don Estep
wiley   +1 more source

Invariant Measure and Universality of the 2D Yang–Mills Langevin Dynamic

Communications on Pure and Applied Mathematics, EarlyView.
ABSTRACT We prove that the Yang–Mills (YM) measure for the trivial principal bundle over the two‐dimensional torus, with any connected, compact structure group, is invariant for the associated renormalised Langevin dynamic. Our argument relies on a combination of regularity structures, lattice gauge‐fixing and Bourgain's method for invariant measures ...
Ilya Chevyrev, Hao Shen
wiley   +1 more source

Global analysis on a continuous planar piecewise linear differential system with three zones

Electronic Journal of Differential Equations, 2023
Man Jia, Youfeng Su, Hebai Chen
doaj  

The Benjamin–Ono Equation in the Zero‐Dispersion Limit for Rational Initial Data: Generation of Dispersive Shock Waves

Communications on Pure and Applied Mathematics, EarlyView.
ABSTRACT The leading‐order asymptotic behavior of the solution of the Cauchy initial‐value problem for the Benjamin–Ono equation in L2(R)$L^2(\mathbb {R})$ is obtained explicitly for generic rational initial data u0$u_0$. An explicit asymptotic wave profile uZD(t,x;ε)$u^\mathrm{ZD}(t,x;\epsilon)$ is given, in terms of the branches of the multivalued ...
Elliot Blackstone, Louise Gassot, Patrick Gérard, Peter D. Miller   +3 more
wiley   +1 more source

Modelling Sustainability Performance in Manufacturing Companies

Corporate Social Responsibility and Environmental Management, EarlyView.
ABSTRACT Nowadays, organisations need to operate with economic, social and environmental goals in mind. Indices objectively quantify such goals; hence, an organisation can develop and compare policies based on future index values. We propose a system dynamics‐based model of a manufacturing company that frames its operations in terms of a set of easily ...
Harol Andrey Avila‐Choconta, Liliana Ruiz‐Acosta, David Andrés Camargo‐Mayorga, Mario Andrés Muñoz   +3 more
wiley   +1 more source

Characterizing early behavioral and social–emotional problems in young children with SCN1A+ Dravet syndrome: Findings from the ENVISION prospective natural history study

Epilepsia, EarlyView.
Abstract Objective Dravet syndrome (DS) is the prototypic developmental and epileptic encephalopathy, characterized by drug‐resistant seizures, developmental slowing, and many other morbidities. Detailed characterization of behavioral phenotypes and social–emotional skill development are limited.
Ingrid E. Scheffer, M. Scott Perry, Joseph Sullivan, Susana Boronat, James Wheless, Andreas Brunklaus, Linda Laux, Anup D. Patel, Colin Roberts, Dennis Dlugos, Deborah Holder, Kelly Knupp, Matt Lallas, Steven Phillips, Eric Segal, Dennis Lal, Elaine Wirrell, Sameer M. Zuberi, Rebecca Shaffer, Mary Wojnaroski, Madison M. Berl, Sarah Christensen, Emma S. James, Maria Candida Vila, Norman Huang, Jacqueline S. Gofshteyn, Salvador Rico   +26 more
wiley   +1 more source