Results 21 to 30 of about 42,948 (219)

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  

Numerical simulation of stratified flows usingOpenFOAM package

open access: yesТруды Института системного программирования РАН, 2018
The paper is devoted to construction of a numerical model and computations of continuously stratified fluid flows in field of external mass forces accounting for dissipative factors, viscosity and diffusion. Mathematical model is based on the fundamental
N. F. Dimitrieva, Ya. V. Zagumennyi
doaj   +1 more source

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

Convex Flexible Branch Model (CFBM): Convex model for solving AC/DC hybrid networks optimal power flows

open access: yesInternational Journal of Electrical Power & Energy Systems
Transmission technologies such as VSC-High-Voltage DC (HVDC) transmission and Multi Terminal DC (MTDC) grids are becoming more common due to their advantages for bulk transmission and their ability to provide coupling conditions for RES-based generation.
Gregorio Higuera-Gutiérrez   +2 more
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

Speciation Through the Lens of Population Dynamics: A Theoretical Primer on How Small and Large Populations Diverge

open access: yesPopulation Ecology, EarlyView.
Population size and dynamics fundamentally shape speciation by influencing genetic drift, founder events, and adaptive potential. Small populations may speciate rapidly due to stronger drift, whereas large populations harbor more genetic diversity, which can alter divergence trajectories. We highlight theoretical models that incorporate population size
Ryo Yamaguchi   +3 more
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

Application of explicit model predictive control to a vehicle semi-active suspension system

open access: yesJournal of Low Frequency Noise, Vibration and Active Control, 2020
The vehicle semi-active suspension is a typical multiple-input multiple-output system with strong couplings, actuator constraints and fast dynamics. This paper addresses the damping force regulation of shock-absorber in vehicle semi-active suspensions ...
Zhang Houzhong   +4 more
doaj   +1 more source

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