Results 21 to 30 of about 537,357 (224)

Modelling rapid mass movements using the shallow water equations in Cartesian coordinates [PDF]

open access: yesNatural Hazards and Earth System Sciences, 2015
We propose a new method to model rapid mass movements on complex topography using the shallow water equations in Cartesian coordinates. These equations are the widely used standard approximation for the flow of water in rivers and shallow lakes, but the ...
S. Hergarten, J. Robl
doaj   +1 more source

The Standard Model as a noncommutative geometry: the low energy regime

open access: yes, 1997
We render a thorough, physicist's account of the formulation of the Standard Model (SM) of particle physics within the framework of noncommutative differential geometry (NCG). We work in Minkowski spacetime rather than in Euclidean space.
Abachi   +65 more
core   +1 more source

Losing Sight of the Forest for the Ψ: Beyond the Wavefunction Hegemony [PDF]

open access: yes, 2019
Traditionally Ψ is used to stand in for both the mathematical wavefunction (the representation) and the quantum state (the thing in the world). This elision has been elevated to a metaphysical thesis by advocates of the view known as wavefunction ...
Bokulich, Alisa
core   +3 more sources

Design and Kinematics Analysis of the Wearable Lower Limb Exoskeleton

open access: yesJixie chuandong, 2023
With the increasing proportion of people with lower limb dysfunction in the population, lower limb exoskeleton, mainly in the form of physical assisted therapy, has become a research hotspot in the field of rehabilitation. In this study, a wearable lower
Wang Xiaowei, Chen Xu, Gao Shenglu
doaj  

Accommodating Taste and Scale Heterogeneity for Front-Seat Passenger’ Choice of Seat Belt Usage

open access: yesMathematics, 2021
There is growing interest in implementation of the mixed model to account for heterogeneity across population observations. However, it has been argued that the assumption of independent and identically distributed (i.i.d) error terms might not be ...
Mahdi Rezapour, Khaled Ksaibati
doaj   +1 more source

The effect of the incidence function on the existence of backward bifurcation

open access: yesLetters in Biomathematics, 2016
In modelling, the dynamics of infectious disease, the choice of the specific mathematical formulation of disease transmission (i.e. the incidence function) is one of the initial assumptions to be made.
David J. Gerberry, Andrew M. Philip
doaj   +1 more source

Bilinear Quadratic Feedback Control of Modular Multilevel Converters

open access: yesEnergies, 2023
The present paper introduces the formulation and development of a bilinear quadratic control algorithm for Modular Multilevel Converter (MMCs), with a specific emphasis on achieving internal energy stabilization and balance within the converter.
Guacira Costa de Oliveira   +4 more
doaj   +1 more source

An approach for coherent periodogram averaging of tilt‐series data for improved contrast transfer function estimation

open access: yesFEBS Open Bio, EarlyView.
The contrast transfer function (CTF) is an imaging aberration that is a major resolution‐limiting factor in cryo‐electron microscopy (cryo‐EM). Precise CTF estimation is key to overcoming this limitation, but is particularly challenging in cryo‐electron tomography (cryo‐ET) data. Here, we present an approach for using geometric information to assist in
Sagar Khavnekar, William Wan
wiley   +1 more source

Modeling dynamic and static operating modes of a low-power asynchronous electric drive

open access: yesInformatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska
The article presents a mathematical model of the asynchronous motor in oblique coordinates, based on differential equations expressed in the standard Cauchy form.
Viktor Lyshuk   +6 more
doaj   +1 more source

Numerical simulation of the non-regular mode of cooling a high-temperature metal billet by the flow of a gas-liquid medium

open access: yesMATEC Web of Conferences, 2018
A mathematical model of heat transfer at cooling a high-temperature metal billet from structural steel by the flow of a gas-liquid medium in a vertical circular channel is presented.
Makarov Sergey   +3 more
doaj   +1 more source

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