Results 11 to 20 of about 140,001 (255)
External Factor Variable Connectivity Index
Journal of Chemical Information and Computer Sciences, 2003 A new variable index, external factor variable connectivity index (EFVCI), is proposed, in which the atomic attribute is divided into two parts. The innate part is denoted as outer-shell electrons and external part or perturbation by other atoms is represented as summation, multiplied by a variable x, of squared reciprocal matrix of i row (corresponds ...
Qian-Nan Hu +7 more
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Filomat, 2011 The sum-connectivity index of a simple graph G is defined in mathematical chemistry as R+(G) = ? uv?E(G)(du+dv)?1/2, where E(G) is the edge set of G and du is the degree of vertex u in G. We give a best possible lower bound for the sum-connectivity index of a graph (a triangle-free graph, respectively) with n vertices and minimum degree at ...
Wang, Shilin +2 more
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On eccentric connectivity index
, 2010 The eccentric connectivity index, proposed by Sharma, Goswami and Madan, has been employed successfully for the development of numerous mathematical models for the prediction of biological activities of diverse nature. We now report mathematical properties of the eccentric connectivity index.
Zhou, Bo, Du, Zhibin
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The Q-index and Connectivity of Graphs
Journal of the Operations Research Society of China, 2022 A connected graph $G$ is said to be $k$-connected if it has more than $k$ vertices and remains connected whenever fewer than $k$ vertices are deleted. In this paper, for a connected graph $G$ with sufficiently large order, we present a tight sufficient condition for $G$ with fixed minimum degree to be $k$-connected based on the $Q$-index.
Peng-Li Zhang +3 more
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Computing the Variable Vertex-connectivity Index [PDF]
Croatica Chemica Acta, 2002 A Computer program has been designed for efficacious computation of the variable connectivity index. It has been tested on Randić’s and Basak’s work20 on aliphatic primary amines. We have repro-duced their results for the fit model. We have also cross-validated (CV) this model.
Kezele, Nenad +4 more
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Amplified eccentric connectivity index of graphs [PDF]
, 2022 A new distance based graphical index, coined as ampli ed eccentric connec- tivity index, has been established and the formulae to calculate the ampli ed eccentric connectivity index of some standard graphs, Dutch windmill graph and molecular graph of ...
Puneeth, S., Sujatha, H. N., Mathad, V.
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Reproducibility of functional connectivity and graph measures based on the Phase Lag Index (PLI) and weighted Phase Lag Index (wPLI) derived from high resolution EEG [PDF]
, 2014 Functional connectivity (FC) and graph measures provide powerful means to analyze complex networks. The current study determines the inter-subject-variability using the coefficient of variation (CoV) and long-term test-retest-reliability (TRT) using the ...
Florian Hatz +23 more
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On atom–bond connectivity index of connected graphs
Discrete Applied Mathematics, 2011 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Rundan Xing, Bo Zhou 0007, Fengming Dong
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Representation of landscape hydrological connectivity using a topographically driven surface flow index. [PDF]
, 2009 This paper assesses the extent to which a topographically defined description of the spatial arrangement of catchment wetness can be used to represent landscape hydrological connectivity in temperate river catchments.
Heathwaite, A. L. +3 more
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A note on general sum-connectivity index
, 2023 For a simple finite graph G, general sum-connectivity index is defined for any real number α as χα(G) = , which generalises both the first Zagreb index and the ordinary sum-connectivity index.
Phanjoubam, Chinglensana +2 more
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