Results 11 to 20 of about 737,146 (331)

Approximation Algorithms for Sorting λ-Permutations by λ-Operations

open access: yesAlgorithms, 2021
Understanding how different two organisms are is one question addressed by the comparative genomics field. A well-accepted way to estimate the evolutionary distance between genomes of two organisms is finding the rearrangement distance, which is the ...
Guilherme Henrique Santos Miranda   +3 more
doaj   +1 more source

Combinatorial Dominance Guarantees for Heuristic Algorithms [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2007
An $f(n)$ $\textit{dominance bound}$ on a heuristic for some problem is a guarantee that the heuristic always returns a solution not worse than at least $f(n)$ solutions.
Daniel Berend   +2 more
doaj   +1 more source

Approximation Algorithms for Partially Colorable Graphs [PDF]

open access: yes, 2019
Graph coloring problems are a central topic of study in the theory of algorithms. We study the problem of partially coloring partially colorable graphs. For alpha = alpha |V| such that the graph induced on S is k-colorable.
Ghoshal, Suprovat   +2 more
core   +2 more sources

Scalability of Betweenness Approximation Algorithms: An Experimental Review

open access: yesIEEE Access, 2019
Betweenness centrality, which measures the contribution of an individual node to the network's connectivity by counting the number of shortest paths a node appears in, is widely used for the analysis of the complex networks.
Sebastian Wandelt   +2 more
doaj   +1 more source

Fast Square Root Calculation without Division for High Performance Control Systems of Power Electronics

open access: yesCES Transactions on Electrical Machines and Systems, 2022
The calculation of square roots is a frequently used operation in control systems of power electronics for different applications: motor drives, power converters, etc. At the same time, the execution of this procedure significantly loads microcontrollers
Anton Dianov   +2 more
doaj   +1 more source

Transitivity Demolition and the Fall of Social Networks

open access: yesIEEE Access, 2017
In this paper, we study crucial elements of a complex network, namely its nodes and connections, which play a key role in maintaining the network's structure and function under unexpected structural perturbations of nodes and edges removal. Specifically,
Hung T. Nguyen   +4 more
doaj   +1 more source

Edit Distance with Block Deletions

open access: yesAlgorithms, 2011
Several variants of the edit distance problem with block deletions are considered. Polynomial time optimal algorithms are presented for the edit distance with block deletions allowing character insertions and character moves, but without block moves.
Dana Shapira, James A. Storer
doaj   +1 more source

Connected bin packing problem on traceable graphs [PDF]

open access: yesIranian Journal of Numerical Analysis and Optimization, 2022
We consider a new extension of the bin packing problem in which a set of connectivity constraints should be satisfied. An undirected graph with a weight function on the nodes is given.
A. Nejoomi, A. Dolati
doaj   +1 more source

Structural Rounding: Approximation Algorithms for Graphs Near an Algorithmically Tractable Class [PDF]

open access: yes, 2018
We develop a framework for generalizing approximation algorithms from the structural graph algorithm literature so that they apply to graphs somewhat close to that class (a scenario we expect is common when working with real-world networks) while still ...
Demaine, Erik D.   +7 more
core   +2 more sources

Influence Circle Covering in Large-Scale Social Networks: A Shift Approach

open access: yesIEEE Access, 2021
Given a specific propagation speed $h$ in a social network $G(V, E)$ , an influence circle(IC) of a node $s$ in time $t$ is a node set of its influenced nodes, where the distance between $s$ and its expected influenced node $w$ is less than ...
Wangjun Ying, Jian Xu
doaj   +1 more source

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