Results 31 to 40 of about 1,327 (253)

Infinite point and Riemann–Stieltjes integral conditions for an integro-differential equation

Nonlinear Analysis, 2019
In this paper, we study the existence of solutions for two nonlocal problems of integro-differential equation with nonlocal infinite-point and Riemann–Stieltjes integral boundary conditions. The continuous dependence of the solution will be studied.
Ahmed El-Sayed, Reda Gamal
doaj   +1 more source

On the spectrum of a stationary problem with nonlocal integral type boundary condition

Lietuvos matematikos rinkinys, 2004
We investigated a eigenvalue problem for simple second order ordinary differential equation with one inte­gral type nonlocal boundary condition. The eigenvalues and eigenfunctions of such problem are depending on few parameters in the nonlocal boundary conditions. For some values of those parameters all eigen­values are positive.
Sigita Pečiulytė, Olga Štikonienė, Artūras Štikonas   +2 more
openaire   +2 more sources

Symbolic Algorithm for Solving Nonlocal Boundary Value Problems for Systems of Ordinary Integrodifferential Equations

Algorithms
Boundary value problems for systems of integrodifferential equations appear in many branches of science and engineering. Accuracy in modeling complex processes requires the specification of nonlocal boundary conditions, including multipoint and integral ...
Efthimios Providas, Ioannis N. Parasidis, Jeyhun E. Musayev   +2 more
doaj   +1 more source

Studying a system of non-local condition hyperbolic equations

Қарағанды университетінің хабаршысы. Математика сериясы
Local boundary value problems for hyperbolic differential equations have been studied in considerable detail. However, the mathematical modeling of a number of real-world processes leads to nonlocal boundary value problems involving nonlinear hyperbolic
Y.A. Sharifov, A.R. Mammadli
doaj   +1 more source

BOUNDARY VALUE PROBLEM WITH A NONLOCAL BOUNDARY CONDITION OF INTEGRAL FORM FOR A MULTIDIMENSIONAL EQUATION OF IV ORDER

Vestnik of Samara University. Natural Science Series, 2021
The aim of this paper is to study the solvability of solution of non-local problem with integral condition in spatial variables for high-order linear equation in the classe of regular solutions (which have all the squaredderivatives generalized by S.L. Sobolev that are included in the corresponding equation).
openaire   +2 more sources

Polymeric Sorbents as Energy‐Efficient Alternative to Cryogenic Distillation for Light Hydrocarbon Purification

Advanced Materials, EarlyView.
The transition from cryogenic distillation to polymeric sorbents for light hydrocarbon purification is crucial for energy and environmental sustainability. The polymeric sorbents are engineered to separate gas mixtures based on their specific properties.
Kelechi Festus, Ankit Mondal, Suman Mandal, Jazmine Aiya D. Marquez, Arnab Ghosh, Aishi Sikdar, Urme Podder, Ahana Sarkar, Qingsheng Wang, Hong‐Cai Zhou   +9 more
wiley   +1 more source

Engineering Metal‐Pocket Cooperativity in Single‐Atom COF Nanozymes for Selective Cascade Catalysis

Advanced Materials, EarlyView.
A multilevel programming strategy is developed to engineer single‐atom COF nanozymes with tunable metal centers and chiral pockets inspired by heme–pocket cooperativity. This approach enables controlled metal–pocket interplay for asymmetric cascade catalysis, delivering high activity, selectivity, and recyclability in an asymmetric oxidation–aldol ...
Ziping Li, Qijun Sun, Yawen Hao, Haotian Wen, Shery Chang, Fengwang Li, Jiangtao Xu, Kang Liang   +7 more
wiley   +1 more source

Hole‐Activated Lattice Oxygen Enables Pt‐Free Propane Dehydrogenation by Eliminating the Hydrogen Recombination Bottleneck

Angewandte Chemie, EarlyView.
Trace Mg doping into gallia–alumina generates hole‐type oxygen species that accelerate hydrogen recombination, eliminating the need for Pt promotion. The fully oxide‐based catalyst resists sintering under repeated regeneration, outperforming benchmark PtSn and CrOx catalysts with exceptional stability over 30 dehydrogenation–regeneration cycles ...
DongHwan Oh, Jaewoo Jeong, Susung Lee, Younghwan Park, Seunghyuck Chi, Yaejun Baik, Hyungjun Kim, Hyeyoung Shin, Minkee Choi   +8 more
wiley   +2 more sources

Existence results of fractional differential equations with nonlocal double-integral boundary conditions

Mathematical Biosciences and Engineering, 2022
<abstract><p>This article presents the existence outcomes concerning a family of singular nonlinear differential equations containing Caputo's fractional derivatives with nonlocal double integral boundary conditions. According to the nature of Caputo's fractional calculus, the problem is converted into an equivalent integral equation, while
openaire   +3 more sources

Tunable Quasi‐Resonances in Polypyrrole Nanodisks

Advanced Optical Materials, EarlyView.
Polaronic carrier absorption enables electrochemically switchable quasi‐resonances in conducting polymer nanoantennas. ABSTRACT Redox‐tunable conducting polymers have emerged as promising materials for dynamic plasmonics and metasurfaces. However, only a few conducting polymers with particularly high conductivities (>1000 S/cm) have been reported to ...
Weiwei Liu, Chaoyang Kuang, Vallery Stanishev, Vanya Darakchieva, Shangzhi Chen, Magnus P. Jonsson   +5 more
wiley   +1 more source