Results 71 to 80 of about 2,363 (230)

Stability analysis of q-axis rotor flux based model reference adaptive system updating rotor time constant in induction motor drives

CES Transactions on Electrical Machines and Systems, 2017
q-axis rotor flux can be chosen to form a model reference adaptive system (MRAS) updating rotor time constant online in induction motor drives. This paper presents a stability analysis of such a system with Popov's hyperstability concept and small-signal
Shuying Yang, Pengpeng Cao, Xing Zhang
doaj   +1 more source

Hydrophobic Moieties Bestow Fast-Folding and Hyperstability on Collagen Triple Helices.

Journal of the American Chemical Society, 2019
Trans amide bonds and fast cis- trans isomerization of Xaa-Pro bonds are crucial for the stability and folding rate of collagen, the most abundant protein in mammals.
Jasmine Egli, Christiane Siebler, M. Köhler, R. Zenobi, H. Wennemers   +4 more
semanticscholar   +1 more source

Mixed Support for the Temperature‐Size Rule in Wild Freshwater Fishes

Ecology Letters, Volume 29, Issue 2, February 2026.
We use age and length data of 1.4 million fish from 2704 lakes to evaluate the temperature‐size rule in wild populations. We found evidence that warmer environments are associated with faster life histories and reduced lifespans, but this seldom translates to smaller maximum body sizes. A deeper understanding of how temperature shapes growth in natural
George C. Brooks, Paul N. Frater, Olaf P. Jensen, Gretchen J. A. Hansen, Craig Paukert, Michael Verhoeven, Lyndsie Wszola, Luoliang Xu, Zachary S. Feiner   +8 more
wiley   +1 more source

Characterization and stability analysis of advanced multi-quadratic functional equations

Advances in Difference Equations, 2021
In this paper, we introduce a new quadratic functional equation and, motivated by this equation, we investigate n-variables mappings which are quadratic in each variable.
Abasalt Bodaghi, Hossein Moshtagh, Hemen Dutta   +2 more
doaj   +1 more source

Angler Heterogeneity in Newfoundland and Labrador, Canada: Insights From Nearly Three Decades (1994–2022) of Atlantic Salmon Angler License and Activity Records

Fisheries Management and Ecology, Volume 33, Issue 1, Page 88-104, February 2026.
ABSTRACT Angler demographics and motivations are an important consideration to successful fisheries management. We examined 29 years of angler license and activity records from the recreational Atlantic salmon fishery in Newfoundland and Labrador, Canada to: (1) provide a contemporary evaluation of angler demographic trends; (2) evaluate age and ...
Travis E. Van Leeuwen, Michelle G. Fitzsimmons, J. Brian Dempson, Christopher W. White, Mark Young, Donald Keefe, Isabelle Schmelzer, Nicholas I. Kelly, Craig F. Purchase, Blair Adams, David Coté   +10 more
wiley   +1 more source

An Adaptation Mechanism of Model Reference Adaptive System Based on Variable Structure Control for Online Parameter Estimation of IPMSM

IET Control Theory &Applications, Volume 20, Issue 1, January/December 2026.
ABSTRACT This study introduces stator currents‐based model reference adaptive system (MRAS) estimators that employ variable structured control (VSC) in the adaptation mechanism to enable the online estimation of stator resistance and permanent magnet (PM) flux in interior permanent magnet synchronous motors (IPMSMs).
Ertugrul Ates, Burak Tekgun, Murat Barut
wiley   +1 more source

Equivalence for Various Forms of Quadratic Functional Equations and Their Generalized Hyers–Ulam–Rassias Stability

International Journal of Mathematics and Mathematical Sciences, 2023
In this manuscript, we study the properties and equivalence results for different forms of quadratic functional equations. Using the Brzdȩk and Ciepliński fixed-point approach, we investigate the generalized Hyers–Ulam–Rassias stability for the 3 ...
Ravinder Kumar Sharma, Sumit Chandok
doaj   +1 more source

Performance Improvement of PMSG‐Based Wind Energy Systems via Sensorless FS‐Predictive Current Control With MRAS and MPPT‐OTC Integration

IET Electric Power Applications, Volume 20, Issue 1, January/December 2026.
This paper proposes a hybrid sensorless control strategy for a permanent magnet synchronous generator (PMSG)‐based wind energy conversion system (WECS). The approach integrates finite‐set predictive current control (FS‐PCC), a model reference adaptive system (MRAS) estimator and an optimal torque control maximum power point tracking (MPPT‐OTC) method ...
Hicham Sayhi, Amor Bourek, Abdelkarim Ammar, Ali Teta, Ahmed Chennana, Abdelaziz Rabehi, Mohamed Benghanem, Takele Ferede Agajie   +7 more
wiley   +1 more source

A Review of Model Predictive Direct Speed Control for PMSMs: Classification, Robustness and Comparative Analysis

IET Power Electronics, Volume 19, Issue 1, January/December 2026.
Model Predictive Direct Speed Control (MPDSC), which directly optimizes the rotor speed based on a predictive model, exhibits significantly superior overall performance compared with traditional cascaded controller. This paper presents the first systematic review of MPDSC methods for PMSMs.
Hao Fan, Tianzhe Yang, Baoyang Liu, Chaochen Gu, Xinping Guan   +4 more
wiley   +1 more source

ON HYPERSTABILITY OF GENERALISED LINEAR FUNCTIONAL EQUATIONS IN SEVERAL VARIABLES

, 2015
We obtain some results on approximate solutions of the generalised linear functional equation Sigma(m)(i=1) L-i f (Sigma(n)(j=1) a(ij)x(j)) = 0 for functions mapping a normed space into a normed space.
Zhang, D., Zhang, Dong
core   +1 more source