Results 71 to 80 of about 38,430 (291)

Vorticity evolution in perturbed Poiseuille flow [PDF]

Theoretical and Applied Mechanics, 2013
We consider numerical simulation of temporal hydrodynamic instability with finite amplitude perturbations in plane incompressible Poiseuille flow. Two dimensional Navier Stokes equations have been used and reduced to vorticity-stream function ...
Jovanović Miloš M.
doaj   +1 more source

On the nullity of connected graphs with least eigenvalue at least -2

Applicable Analysis and Discrete Mathematics, 2013
Let L (resp. L+) be the set of connected graphs with least adjacency eigenvalue at least -2 (resp. larger than -2). The nullity of a graph G, denoted by ?(G), is the multiplicity of zero as an eigenvalue of the adjacency matrix of G. In this paper, we give the nullity set of L+ and an upper bound on the nullity of exceptional graphs.
Jiang Zhou, Lizhu Sun, Hongmei Yao, Changjiang Bu   +3 more
openaire   +2 more sources

An exciting Approach to Theoretical Spectroscopy

Advanced Science, EarlyView.
ABSTRACT Theoretical spectroscopy, and more generally, electronic‐structure theory, are powerful concepts for describing the complex many‐body interactions in materials. They cover methods from ground‐state properties to lattice excitations and light‐matter interaction, including time‐resolved variants.
Martí Raya‐Moreno, Alexander Buccheri, Noah Alexy Dasch, Nasrin Farahani, Ignacio Gonzalez Oliva, Andris Gulans, Seokhyun Hong, Manoar Hossain, Hannah Kleine, Martin Kuban, Sven Lubeck, Benedikt Maurer, Pasquale Pavone, Fabian Peschel, Daria Popova‐Gorelova, Lu Qiao, Elias Richter, Santiago Rigamonti, Ronaldo Rodrigues Pela, Maximilian Schebek, Kshitij Sinha, Daniel T. Speckhard, Jan Stutz, Sebastian Tillack, Dmitry Tumakov, Jānis Užulis, Mara Voiculescu, Cecilia Vona, Mao Yang, Claudia Draxl   +29 more
wiley   +1 more source

Total Least Squares Methods [PDF]

, 2010
Recent advances in total least squares approaches for solving various errors-in-variables modeling problems are reviewed, with emphasis on the following generalizations: 1.
Markovsky, Ivan, Sima, Diana M., Van Huffel, Sabine   +2 more
core  

The least eigenvalue of the complements of graphs with given connectivity [PDF]

, 2023
The least eigenvalue of a graph $G$ is the least eigenvalue of adjacency matrix of $G$. In this paper we determine the graphs which attain the minimum least eigenvalue among all complements of connected simple graphs with given connectivity.Comment: 10 ...
Li, Keng, Qiu, Huan, Wang, Guoping
core   +1 more source

Piecewise uniform optimal design of a bar with an attached mass

Electronic Journal of Differential Equations, 2015
We minimize, with respect to the cross sectional area, the mass of a bar given the rate of heat transfer. The bar enhances the heat transfer surface of a larger known mass to which the bar is attached.
Boris P. Belinskiy, James W. Hiestand, John V. Matthews   +2 more
doaj  

Multiple Solutions for Elliptic px,qx-Kirchhoff-Type Potential Systems in Unbounded Domains

International Journal of Differential Equations, 2020
In this paper, we establish the existence of at least three weak solutions for a parametric double eigenvalue quasi-linear elliptic px,qx-Kirchhoff-type potential system.
Nabil Chems Eddine, Abderrahmane El Hachimi   +1 more
doaj   +1 more source

StackingNet: Collective Inference Across Independent AI Foundation Models

Advanced Science, EarlyView.
ABSTRACT Artificial intelligence (AI) built on large foundation models has transformed language understanding, computer vision, and reasoning, yet these systems remain isolated and cannot readily share their capabilities. Coordinating the complementary strengths of independently developed, black‐box foundation models is essential for trustworthy ...
Siyang Li, Chenhao Liu, Dongrui Wu, Zhigang Zeng, Lieyun Ding   +4 more
wiley   +1 more source

The spectral Galerkin method for the differential operator eigenvalue problems based on a least-squares form and its Schur complement type implementation methods

Results in Applied Mathematics
The differential operator eigenvalue problems often arise in the field of physics and engineering, such as solid band structure, electron orbitals of atoms or molecules, and quantum bound states.
Jiaoxia Huang, Yonghui Qin
doaj   +1 more source

Global convergence of RTLSQEP: A solver of regularized total least squares problems via quadratic eigenproblems

Mathematical Modelling and Analysis, 2008
The total least squares (TLS) method is a successful approach for linear problems if both the matrix and the right hand side are contaminated by some noise.
Jörg Lampe, Heinrich Voss
doaj   +1 more source