Results 41 to 50 of about 3,357,696 (317)

Charger Deployment Optimization in Wireless Rechargeable Sensor Network [PDF]

open access: yesJisuanji gongcheng, 2018
In order to minimize the charging cost in wireless sensor networks,two wireless charger location optimization algorithms are designed according to the location and topological features of sensor nodes:approximate algorithm and cluster partitioning ...
WANG Zhifang,ZHENG Lin,LI Xiaoji
doaj   +1 more source

The metal insulator transition in cluster dynamical mean field theory: intersite correlation, cluster size, interaction strength, and the location of the transition line [PDF]

open access: yes, 2008
To gain insight into the physics of the metal insulator transition and the effectiveness of cluster dynamical mean field theory (DMFT) we have used one, two and four site dynamical mean field theory to solve a polaron model of electrons coupled to a ...
Lin, Chungwei, Millis, Andrew J.
core   +1 more source

Dynamical cluster approximation with continuous lattice self-energy [PDF]

open access: yes, 2013
The dynamical cluster approximation (DCA) is a systematic extension beyond the single-site approximation in dynamical mean field theory, to include spatially nonlocal correlations in quantum many-body simulations of strongly correlated systems. We extend
Peter Staar, T. Maier, T. Schulthess
semanticscholar   +1 more source

On Approximate Geometric k -Clustering [PDF]

open access: yesDiscrete & Computational Geometry, 2000
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +1 more source

Improved Combinatorial Approximations for Weighted Correlation Clustering [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science
We present combinatorial approximation algorithms for the weighted correlation clustering problem. In this problem, we have a set of vertices and two weight values for each pair of vertices, denoting their difference and similarity.
Mojtaba Ostovari, Alireza Zarei
doaj   +1 more source

Cluster approximation solution of a two species annihilation model [PDF]

open access: yes, 2003
A two species reaction-diffusion model, in which particles diffuse on a one-dimensional lattice and annihilate when meeting each other, has been investigated. Mean field equations for general choice of reaction rates have been solved exactly.
A. Aghamohammadi   +14 more
core   +1 more source

Competition between band and Mott insulators in the bilayer Hubbard model: A dynamical cluster approximation study [PDF]

open access: yes, 2013
We investigate the nature of the insulating phases in a bilayer Hubbard model with intralayer coupling $t$ and interlayer coupling ${t}_{\ensuremath{\perp}}$ at large interaction strength $U/t$ and half-filling.
Hunpyo Lee   +3 more
semanticscholar   +1 more source

Systematic Quantum Cluster Typical Medium Method for the Study of Localization in Strongly Disordered Electronic Systems

open access: yesApplied Sciences, 2018
Great progress has been made in recent years towards understanding the properties of disordered electronic systems. In part, this is made possible by recent advances in quantum effective medium methods which enable the study of disorder and electron ...
Hanna Terletska   +6 more
doaj   +1 more source

Cluster-based Kriging approximation algorithms for complexity reduction [PDF]

open access: yesApplied intelligence (Boston), 2017
Kriging or Gaussian Process Regression is applied in many fields as a non-linear regression model as well as a surrogate model in the field of evolutionary computation.
Bas van Stein   +4 more
semanticscholar   +1 more source

Approximating Clustering Coefficient and Transitivity

open access: yesJournal of Graph Algorithms and Applications, 2005
Summary: Since its introduction in the year 1998 by Watts and Strogatz, the clustering coefficient has become a frequently used tool for analyzing graphs. In 2002 the transitivity was proposed by Newman, Watts and Strogatz as an alternative to the clustering coefficient. As many networks considered in complex systems are huge, the efficient computation
Schank, Thomas, Wagner, Dorothea
openaire   +1 more source

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