Results 11 to 20 of about 16,026 (219)

Study of trailing vortices and impeller jet instabilities of a flat blade impeller in small‐scale reactors

open access: yesAIChE Journal, Volume 69, Issue 2, February 2023., 2023
Abstract The design of economically feasible and profitable production processes has driven companies toward integrated continuous manufacturing by reducing working volumes and increasing operating frequencies. Thus, the development of robust small‐scale devices capable of multivariate process optimization is essential.
Artemis‐Danae Charalambidou   +2 more
wiley   +1 more source

Terminal end‐on coordination of dinitrogen versus isoelectronic CO: A comparison using the charge displacement analysis

open access: yesJournal of Computational Chemistry, Volume 44, Issue 3, Page 149-158, January 30, 2023., 2023
The charge displacement analysis is employed on a series of terminal end‐on transition metal dinitrogen complexes. The results provide a measure for the strength of the σ donation and π backdonation. Calculations with a point charge are used to simulate the electrostatic effect in dinitrogen complexes and the influence of the three interactions an on ...
Manuel Schmitt, Ingo Krossing
wiley   +1 more source

Magnetic exchange interactions in binuclear and tetranuclear iron(III) complexes described by spin‐flip DFT and Heisenberg effective Hamiltonians

open access: yesJournal of Computational Chemistry, Volume 44, Issue 3, Page 367-380, January 30, 2023., 2023
Exchange interactions in polynuclear Fe (III) compounds are derived from ab initio calculations based on a single spin‐flip (1SF) approach. Abstract Low‐energy spectra of single‐molecule magnets (SMMs) are often described by Heisenberg Hamiltonians.
Saikiran Kotaru   +3 more
wiley   +1 more source

Nonzero positive solutions of fractional Laplacian systems with functional terms

open access: yesMathematische Nachrichten, Volume 296, Issue 1, Page 102-121, January 2023., 2023
Abstract We study the existence of nonzero positive solutions of a class of systems of differential equations driven by fractional powers of the Laplacian. Our approach is based on the notion of fixed point index, and allows us to deal with nonlocal functional weights and functional boundary conditions. We present two examples to shed light on the type
Stefano Biagi   +2 more
wiley   +1 more source

Unconditional basicity of eigenfunctions’ system of Sturm-Liouville operator with an involutional perturbation

open access: yesҚарағанды университетінің хабаршысы. Математика сериясы, 2018
In this paper the question on unconditional basicity of the system of eigenfunctions of the involutive perturbed Sturm-Liouville operator is investigated.
A.A. Sarsenbi
doaj   +1 more source

Inverse Problem for a Fourth-Order Hyperbolic Equation with a Complex-Valued Coefficient

open access: yesMathematics, 2023
This paper studies the existence and uniqueness of the classical solution of inverse problems for a fourth-order hyperbolic equation with a complex-valued coefficient with Dirichlet and Neumann boundary conditions.
Asselkhan Imanbetova   +2 more
doaj   +1 more source

BOUNDARY CONTROL OF ROD TEMPERATURE FIELD WITH A SELECTED POINT

open access: yesВестник КазНУ. Серия математика, механика, информатика, 2022
In this paper, we study the issue of boundary control of the temperature field of a rod with a selected point. The main purpose of the work is to clarify the conditions for the existence of a boundary control that ensures the transition of the ...
K. B. Imanberdiyev   +3 more
doaj   +1 more source

On One Approximate Method of a Boundary Value Problem for a One-Dimensional Advection–Diffusion Equation

open access: yesAxioms, 2022
This article discusses the author’s version of the technology for solving a one-dimensional boundary value problem for a one-dimensional advection–diffusion equation based on the method of separation of variables, as well as the theory of eigenvalues and
Temirkhan Aleroev, Victor Orlov
doaj   +1 more source

Mass Hierarchies and Quantum Gravity Constraints in DKMM‐refined KKLT

open access: yesFortschritte der Physik, Volume 71, Issue 1, January 2023., 2023
Abstract We carefully revisit the mass hierarchies for the KKLT scenario with an uplift term from an anti D3‐brane in a strongly warped throat. First, we derive the bound resulting from what is usually termed “the throat fitting into the bulk” directly from the Klebanov‐Strassler geometry.
Ralph Blumenhagen   +2 more
wiley   +1 more source

On the squared eigenfunction symmetry of the Toda lattice hierarchy [PDF]

open access: yesJ. Math. Phys. 54, 023511 (2013), 2012
The squared eigenfunction symmetry for the Toda lattice hierarchy is explicitly constructed in the form of the Kronecker product of the vector eigenfunction and the vector adjoint eigenfunction, which can be viewed as the generating function for the additional symmetries when the eigenfunction and the adjoint eigenfunction are the wave function and the
arxiv   +1 more source

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