Results 51 to 60 of about 5,354,987 (306)

Optimal Angular Resolution for Face-Symmetric Drawings

Journal of Graph Algorithms and Applications, 2011
Let G be a graph that may be drawn in the plane in such a way that all internal faces are centrally symmetric convex polygons. We show how to find a drawing of this type that maximizes the angular resolution of the drawing, the minimum angle between any two incident edges, in polynomial time, by reducing the problem to one of finding parametric ...
Eppstein, David, Wortman, Kevin A.
openaire   +3 more sources

Simpler and Better Algorithms for Minimum-Norm Load Balancing [PDF]

, 2019
Recently, Chakrabarty and Swamy (STOC 2019) introduced the minimum-norm load-balancing problem on unrelated machines, wherein we are given a set J of jobs that need to be scheduled on a set of m unrelated machines, and a monotone, symmetric norm; We seek
Chakrabarty, Deeparnab, Swamy, Chaitanya
core   +2 more sources

Parameter identification of hysteresis nonlinear dynamic model for piezoelectric positioning system based on the improved particle swarm optimization method

Advances in Mechanical Engineering, 2017
An improved particle swarm optimization method that has better equilibrium characteristic between global search and local search is proposed for parameter identification of hysteresis nonlinear dynamic model for piezoelectric positioning system.
Yu Xie, Jing-Li Fu, Ben-Yong Chen
doaj   +1 more source

A Novel Symmetric Four Dimensional Polytope Found Using Optimization Strategies Inspired by Thomson's Problem of Charges on a Sphere [PDF]

, 2006
Inspired by, and using methods of optimization derived from classical three dimensional electrostatics, we note a novel beautiful symmetric four dimensional polytope we have found with 80 vertices.
Altschuler, Eric Lewin, Perez-Garrido, Antonio, Stong, Richard   +2 more
core   +3 more sources

All Real Eigenvalues of Symmetric Tensors

, 2014
This paper studies how to compute all real eigenvalues of a symmetric tensor. As is well known, the largest or smallest eigenvalue can be found by solving a polynomial optimization problem, while the other middle eigenvalues can not.
Cui, Chun-Feng, Dai, Yu-Hong, Nie, Jiawang   +2 more
core   +1 more source

Efficient description of strongly correlated electrons with mean-field cost [PDF]

, 2014
We present an efficient approach to the electron correlation problem that is well-suited for strongly interacting many-body systems, but requires only mean-field-like computational cost. %which is based on orbital optimization of electron pairs.
Ayers, Paul W., Boguslawski, Katharina, Bultinck, Patrick, De Baerdemacker, Stijn, Tecmer, Paweł, Van Neck, Dimitri   +5 more
core   +3 more sources

Time after time – circadian clocks through the lens of oscillator theory

FEBS Letters, EarlyView.
Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo, Carolin Ector, Hanspeter Herzel   +2 more
wiley   +1 more source

In situ molecular organization and heterogeneity of the Legionella Dot/Icm T4SS

FEBS Letters, EarlyView.
We present a nearly complete in situ model of the Legionella Dot/Icm type IV secretion system, revealing its central secretion channel and identifying new components. Using cryo‐electron tomography with AI‐based modeling, our work highlights the structure, variability, and mechanism of this complex nanomachine, advancing understanding of bacterial ...
Przemysław Dutka, Yuxi Liu, Stefano Maggi, Debnath Ghosal, Jue Wang, Prashant P. Damke, Stephen D. Carter, Wei Zhao, Sukhithasri Vijayrajratnam, Joseph P. Vogel, Carrie L. Shaffer, Grant J. Jensen   +11 more
wiley   +1 more source

CPD-Structured Multivariate Polynomial Optimization

Frontiers in Applied Mathematics and Statistics, 2022
We introduce the Tensor-Based Multivariate Optimization (TeMPO) framework for use in nonlinear optimization problems commonly encountered in signal processing, machine learning, and artificial intelligence.
Muzaffer Ayvaz, Muzaffer Ayvaz, Lieven De Lathauwer, Lieven De Lathauwer   +3 more
doaj   +1 more source

The maximally entangled symmetric state in terms of the geometric measure

, 2010
The geometric measure of entanglement is investigated for permutation symmetric pure states of multipartite qubit systems, in particular the question of maximum entanglement.
Abramowitz M, Barnum H, Chen L Xu A Zhu H, D'Hondt E, Damian Markham, Erber T, Giraud O, Hannay J H, Hannay J H, Kolenderski P, Leboeuf P, Markham D, Markham D, Markham D, Martin Aulbach, Martin J Giraud O Braun P A Braun D Bastin T, Mio Murao, Penrose R, Plenio M B, Renner R, Sloane N J A Hardin R H Smith W D, Tammes P M L, Thomson J J, Van den Nest M, Wales D J Ulker S, Wang H Ahuja N, Wei T C, Wei T C Severini S, Weisstein E, Zhu H Chen L Hayashi M, Zimba J   +30 more
core   +1 more source