Results 1 to 10 of about 2,126 (197)

Optimized fiducial marker placement using B‐spline surface modeling and graph theory for Cyberknife stereotactic body radiotherapy for superficial tumors [PDF]

open access: yesPrecision Radiation Oncology
CyberKnife, an established noninvasive stereotactic radiotherapy technology, has been extensively utilized to treat various malignancies because of its high precision and conformal dose delivery. The success of CyberKnife treatment is crucially dependent
Jing Huang   +5 more
doaj   +2 more sources

Computing the Atom Graph of a Graph and the Union Join Graph of a Hypergraph

open access: yesAlgorithms, 2021
The atom graph of a graph is a graph whose vertices are the atoms obtained by clique minimal separator decomposition of this graph, and whose edges are the edges of all possible atom trees of this graph.
Anne Berry, Geneviève Simonet
doaj   +1 more source

Properties and Recognition of Atom Graphs

open access: yesAlgorithms, 2022
The atom graph of a connected graph is a graph whose vertices are the atoms obtained by clique minimal separator decomposition of this graph, and whose edges are the edges of all its atom trees.
Geneviève Simonet, Anne Berry
doaj   +1 more source

On Maximal Distance Energy

open access: yesMathematics, 2021
Let G be a graph of order n. If the maximal connected subgraph of G has no cut vertex then it is called a block. If each block of graph G is a clique then G is called clique tree.
Shaowei Sun   +2 more
doaj   +1 more source

The Neighborhood Polynomial of Chordal Graphs [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2022
We study the neighborhood polynomial and the complexity of its computation for chordal graphs. The neighborhood polynomial of a graph is the generating function of subsets of its vertices that have a common neighbor.
Helena Bergold   +2 more
doaj   +1 more source

A FFT-Like MIMO Detection Algorithm

open access: yesIEEE Access, 2020
This paper studies the multiple-input-multiple-output (MIMO) detection problem. Existing works model the MIMO detection as a tree or factor graph. This work adds a new member called the clique graph model to the MIMO detection graph model family so that ...
Peng Du, Yuan Zhang, Teer Ba
doaj   +1 more source

On Weakly Distinguishing Graph Polynomials [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2019
A univariate graph polynomial P(G;X) is weakly distinguishing if for almost all finite graphs G there is a finite graph H with P(G;X)=P(H;X). We show that the clique polynomial and the independence polynomial are weakly distinguishing.
Johann A. Makowsky, Vsevolod Rakita
doaj   +1 more source

Tropical Graph Parameters [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2014
Connection matrices for graph parameters with values in a field have been introduced by M. Freedman, L. Lovász and A. Schrijver (2007). Graph parameters with connection matrices of finite rank can be computed in polynomial time on graph classes of ...
Nadia Labai, Johann Makowsky
doaj   +1 more source

Mind the O˜: Asymptotically Better, but Still Impractical, Quantum Distributed Algorithms

open access: yesAlgorithms, 2023
We present two algorithms in the quantum CONGEST-CLIQUE model of distributed computation that succeed with high probability: one for producing an approximately optimal Steiner tree, and one for producing an exact directed minimum spanning tree, each of ...
Phillip Kerger   +3 more
doaj   +1 more source

Using Machine Learning for Quantum Annealing Accuracy Prediction

open access: yesAlgorithms, 2021
Quantum annealers, such as the device built by D-Wave Systems, Inc., offer a way to compute solutions of NP-hard problems that can be expressed in Ising or quadratic unconstrained binary optimization (QUBO) form.
Aaron Barbosa   +3 more
doaj   +1 more source

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