Results 31 to 40 of about 450,197 (278)

A new approach for ranking decision-making units in data envelopment analysis by using communication game theory [PDF]

open access: yesIranian Journal of Numerical Analysis and Optimization
Ranking decision making units (DMUs) is an important topic in data en-velopment analysis (DEA). When efficient DMUs or inefficient DMUs have the same efficiency score, the traditional DEA model usually fails to rank all DMUs.
M. Amiri, A. Ashrafi
doaj   +1 more source

Shapley ratings in brain networks

open access: yesFrontiers in Neuroinformatics, 2007
Recent applications of network theory to brain networks as well as the expanding empirical databases of brain architecture spawn an interest in novel techniques for analyzing connectivity patterns in the brain.
Rolf Kötter   +7 more
doaj   +1 more source

Three topological features of regulatory networks control life-essential and specialized subsystems

open access: yesScientific Reports, 2021
Gene regulatory networks (GRNs) play key roles in development, phenotype plasticity, and evolution. Although graph theory has been used to explore GRNs, associations amongst topological features, transcription factors (TFs), and systems essentiality are ...
Ivan Rodrigo Wolf   +2 more
doaj   +1 more source

Determination of the Shortest Hamiltonian Paths in an Arbitrary Graph of Distributed Databases

open access: yesРоссийский технологический журнал, 2019
A method has been developed for finding the shortest Hamiltonian path in an arbitrary graph based on the rank approach, which provides high efficiency and a significant reduction in the error in solving the problem of organizing the process of managing ...
E. G. Andrianova   +2 more
doaj   +1 more source

Ranking Ship Detection Methods Using SAR Images Based on Machine Learning and Artificial Intelligence

open access: yesJournal of Marine Science and Engineering, 2023
We aimed to improve the performance of ship detection methods in synthetic aperture radar (SAR) images by utilizing machine learning (ML) and artificial intelligence (AI) techniques.
Muhammad Yasir   +5 more
doaj   +1 more source

Orthogonal Representations, Projective Rank, and Fractional Minimum Positive Semidefinite Rank: Connections and New Directions [PDF]

open access: yes, 2017
Fractional minimum positive semidefinite rank is defined from r-fold faithful orthogonal representations and it is shown that the projective rank of any graph equals the fractional minimum positive semidefinite rank of its complement.
Hogben, L   +3 more
core   +1 more source

Asymptotic tensor rank of graph tensors: beyond matrix multiplication [PDF]

open access: yesComputational Complexity, 2016
We present an upper bound on the exponent of the asymptotic behaviour of the tensor rank of a family of tensors defined by the complete graph on k vertices.
M. Christandl   +2 more
semanticscholar   +1 more source

RAG: RNA-As-Graphs web resource

open access: yesBMC Bioinformatics, 2004
Background The proliferation of structural and functional studies of RNA has revealed an increasing range of RNA's structural repertoire. Toward the objective of systematic cataloguing of RNA's structural repertoire, we have recently described the basis ...
Laserson Uri   +6 more
doaj   +1 more source

Multi-Ship Encounter Situation Identification and Analysis Based on AIS Data and Graph Complex Network Theory

open access: yesJournal of Marine Science and Engineering, 2022
In order to detect multi-ship encounter situations and improve the safety of navigation, this paper proposed a model which was able to mine multi-ship encounter situations from Automatic identification system (AIS) data and analyze the encounter spatial ...
Jixiang Zhu   +4 more
doaj   +1 more source

Chip-firing games on Eulerian digraphs and NP-hardness of computing the rank of a divisor on a graph

open access: yes, 2015
Baker and Norine introduced a graph-theoretic analogue of the Riemann-Roch theory. A central notion in this theory is the rank of a divisor. In this paper we prove that computing the rank of a divisor on a graph is NP-hard.
Kiss, Viktor, Tóthmérész, Lilla
core   +1 more source

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