Results 31 to 40 of about 66 (66)

Stability Analysis and Damping Enhancement of Multi‐PV‐GFM Islanded Microgrids Under Nonuniform Irradiance and Load Disturbances

IET Renewable Power Generation, Volume 20, Issue 1, January/December 2026.
This paper investigates the stability and damping enhancement of multi‐photovoltaic grid‐forming (PV‐GFM) islanded microgrids under nonuniform irradiance and load disturbances. A supervisory control strategy is developed to adaptively tune the virtual resistance and active‐power‐loop damping parameters based on modal sensitivity, dc‐link margin, and ...
Xuesong Zhang, Chouwei Ni, Kaijian Du, Sidun Fang, Bingyin Xue, Jialun Zuo, Litao Zheng   +6 more
wiley   +1 more source

A note on the quasi‐local algebra of expander graphs

Bulletin of the London Mathematical Society, Volume 58, Issue 1, January 2026.
Abstract We show that the quasi‐local algebra of a coarse disjoint union of expander graphs does not contain a Cartan subalgebra isomorphic to ℓ∞$\ell _\infty$. Ozawa has recently shown that these algebras are distinct from the uniform Roe algebras of expander graphs, and our result describes a further difference.
Bruno M. Braga, Ján Špakula, Alessandro Vignati   +2 more
wiley   +1 more source

Fixed Point Property for Nonexpansive Mappings and Reflexivity: A Hilbert C∗‐Module Approach

Journal of Function Spaces, Volume 2026, Issue 1, 2026.
We prove that for any infinite‐dimensional Hilbert space H, there exists a sequence of infinite‐dimensional, full Hilbert C∗‐modules over K(H)—the C∗‐algebra of compact operators on H—each of which is isomorphic to H and has the fixed point property for nonexpansive mappings (FPP).
Kourosh Nourouzi, Seppo Hassi
wiley   +1 more source

A categorical interpretation of continuous orbit equivalence for partial dynamical systems

Bulletin of the London Mathematical Society, Volume 57, Issue 12, Page 3637-3656, December 2025.
Abstract We define the orbit morphism of partial dynamical systems and prove that an orbit morphism being an isomorphism in the category of partial dynamical systems and orbit morphisms is equivalent to the existence of a continuous orbit equivalence between the given partial dynamical systems that preserves the essential stabilisers. We show that this
Gilles G. de Castro, Eun Ji Kang
wiley   +1 more source

MUMOTT: a Python package for the analysis of multi‐modal tensor tomography data

Journal of Applied Crystallography, Volume 58, Issue 5, Page 1834-1845, October 2025.
The MUMOTT Python package facilitates the analysis of small‐ and wide‐angle X‐ray scattering tensor tomography data, using CPU and GPU acceleration to simplify complex computational tasks. Designed for ease of use, extensibility and efficiency, MUMOTT aims to lower barriers to adopting tensor tomography methods within the wider research community.Small‐
Leonard C. Nielsen, Mads Carlsen, Sici Wang, Arthur Baroni, Torne Tänzer, Marianne Liebi, Paul Erhart   +6 more
wiley   +1 more source

Closed equivalence relations on compact spaces and pairs of commutative C*-algebras: a Categorical Approach

Visnik Harkivsʹkogo Nacionalʹnogo Universitetu im. V.N. Karazina. Cepiâ Matematika, Prikladna Matematika i Mehanika
In this paper, we study a categorical extension of the classical Gelfand-Naimark duality between compact Hausdorff spaces and commutative unital C*-algebras.
Роман Скуріхін, Сергій Гефтер, Євген Каролінський   +2 more
doaj   +1 more source

Masking Ability of CAD‐CAM Materials at Different Thicknesses: A Study on Color, Translucency, and Infinite Optical Thickness

Journal of Esthetic and Restorative Dentistry, Volume 37, Issue 9, Page 2134-2143, September 2025.
ABSTRACT Objective To evaluate the masking ability of different thicknesses of CAD‐CAM resin‐matrix and feldspar porcelain materials. Materials and Methods Specimens (Ø7.5 mm, thickness 0.5, 1.0, and 1.5 mm, n = 3/material) were fabricated from Lava Ultimate‐LU, Grandio Blocs‐GB, VITA Enamic‐VE, and VITA Mark II‐VM.
Bruno Arruda Mascaro, Maria Tejada‐Casado, Renata Garcia Fonseca, Juan C. Cardona, José Maurício dos Santos Nunes Reis, María M. Pérez   +5 more
wiley   +1 more source

A method for constructing idempotents in a unital algebra

Учёные записки Казанского университета: Серия Физико-математические науки
A method is proposed for constructing idempotents in a unital algebra 𝒜 using n arbitrary idempotents P1,...,Pn from this algebra. The properties of the resulting idempotents P = P(P1,...,Pn) are investigated; for n = 2 and n = 3, explicit forms of the ...
M. Khadour
doaj   +1 more source

On Gradings of the Operator Algebra Generated by Mapping and Multipliers [PDF]

Учёные записки Казанского университета: Серия Физико-математические науки, 2015
The operator algebra generated by mapping on a countable set and multipliers is considered. The defined mapping induces a family of partial isometries satisfying some relations.
E.V. Patrin
doaj  

Taking limits in topological recursion

Journal of the London Mathematical Society, Volume 112, Issue 3, September 2025.
Abstract When does topological recursion applied to a family of spectral curves commute with taking limits? This problem is subtle, especially when the ramification structure of the spectral curve changes at the limit point. We provide sufficient (straightforward‐to‐use) conditions for checking when the commutation with limits holds, thereby closing a ...
Gaëtan Borot, Vincent Bouchard, Nitin Kumar Chidambaram, Reinier Kramer, Sergey Shadrin   +4 more
wiley   +1 more source