Results 31 to 40 of about 775 (185)
Physicochemical profiling and ranking of parkinson's disease drugs through QSPR and Fuzzy TOPSIS analysis. [PDF]
Sci RepParkinson’s disease is a progressive neurological disorder characterized by the degeneration of the nervous system, leading to impaired motor and non-motor functions.
Chen Y +5 more
europepmc +2 more sources
Atom bond connectivity index for graph with self-loops and its application to structure property relationships in anticancer drugs. [PDF]
Sci RepLet $$G_S$$ be a graph derived from a simple graph G by adding a self-loop to each vertex in a subset $$S\subseteq V(G)$$ . In this paper, we define the atom bond connectivity index of the graph $$G_S$$ as $$ABC(G_S)$$ and the atom bond connectivity ...
Sharath B, Gowtham HJ.
europepmc +2 more sources
Chemical significance and degeneracy of weighted degree-based topological descriptor second Davan index for octane isomers and computation of certain nanostructures. [PDF]
Sci RepThis study introduces a novel topological descriptor, the second Davan index (SDI) based on weighted degree of molecular graphs. Its chemical significance is validated through QSPR modelling of octane isomers, where it exhibits superior correlation with ...
Swapna BS +4 more
europepmc +2 more sources
AIMS Mathematics, 2023 In this paper, we introduce the Gourava Sombor index, the reduced Gourava Sombor index and their corresponding exponentials of a graph. Also we compute these newly defined Gourava Sombor indices and their corresponding exponentials for some important nanostructures which are appeared in nanoscience.
Chenxu Yang +3 more
openaire +3 more sources
Expected Values of Molecular Descriptors in Random Polyphenyl Chains [PDF]
, 2022 A chemical graph is a model used to indicate a chemical combination. In a molecular graph, vertices define atoms, and edges are represented as chemical bonds. A topological index is a single number to characterize the graph of a molecule. In this article,
Ahmad, Sarfraz, Naz, Kiran, Raza, Zahid
core +1 more source
AIMS Mathematics, 2023 <abstract><p>For a graph $ G $, the Sombor index $ SO(G) $ of $ G $ is defined as</p> <p><disp-formula> <label/> <tex-math id="FE1"> \begin{document}$ SO(G) = \sum\limits_{uv\in E(G)}\sqrt{d_{G}(u)^{2}+d_{G}(v)^{2}}, $\end{document} </tex-math></disp-formula></p> <p>where $ d_{G}(u) $
Fan Wu, Xinhui An, Baoyindureng Wu
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Extremal problems on the general Sombor index of a graph [PDF]
, 2022 In this work we obtain new lower and upper optimal bounds of general Sombor indices. Specifically, we get inequalities for these indices relating them with other indices: the first Zagreb index, the forgotten index and the first variable Zagreb index ...
Hernandez, Juan C. +3 more
core +1 more source
On the product of Sombor and modified Sombor indices
Open Journal of Discrete Applied Mathematics, 2023 The Sombor index (\(SO\)) and the modified Sombor index (\(^mSO\)) are two closely related vertex-degree-based graph invariants. Both were introduced in the 2020s, and have already found a variety of chemical, physicochemical, and network-theoretical applications.
Gutman, Ivan +2 more
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Regional characteristics of cloudiness in Serbia during the period 1991–2017
Meteorological Applications, Volume 30, Issue 2, March/April 2023., 2023 The relationship between the monthly cumulative numbers of cloudy‐sky days versus the NAO index in the winter seasons (1991–2017) for 38 analysed climatological stations in Serbia. The correlation coefficient between these two time series is statistically significant (r = −0.56, α = 0.01).
Katarina Veljović Koračin +2 more
wiley +1 more source
On Computing Techniques for Sombor Index of Some Graphs
Mathematical Problems in Engineering, Volume 2022, Issue 1, 2022., 2022 In all types of topological indicators, degree‐based indicators play a major role in chemical graph theory. The topological index is a fixed numeric value associated with graph isomerism. Firstly, in 1972, the concept of degree‐based index was developed by Gutman and Trinajstic.
Kiran Naz +3 more
wiley +1 more source