Results 31 to 40 of about 14,490,419 (262)
Topological Evaluation of Four Para-Line Graphs Absolute Pentacene Graphs Using Topological Indices
International Journal of Analysis and Applications, 2023 A real-number to molecular structure mapping is a topological index. It is a graph invariant method for describing physico-chemical properties of molecular structures specific substances. In that article, We examined pentacene’s chemical composition. The
Mukhtar Ahmad +5 more
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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. Louise +2 more
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Topological Indices of Certain Transformed Chemical Structures
Journal of Chemistry, 2020 Topological indices like generalized Randić index, augmented Zagreb index, geometric arithmetic index, harmonic index, product connectivity index, general sum-connectivity index, and atom-bond connectivity index are employed to calculate the bioactivity ...
Xuewu Zuo +4 more
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Degree-Based Topological Indices of Boron B12
Journal of Chemistry, 2021 Topological index sometimes called molecular descriptor is a numerical value which associates a chemical composition for correlating chemical structure with numerous physical properties, chemical reactivity, or biological activity.
Nouman Saeed +4 more
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Vertex-Based Topological Indices of Double and Strong Double Graph of Dutch Windmill Graph
Journal of Chemistry, 2021 A measurement of the molecular topology of graphs is known as a topological index, and several physical and chemical properties such as heat formation, boiling point, vaporization, enthalpy, and entropy are used to characterize them.
Muhammad Asad Ali +3 more
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Extremum sum-connectivity index of trees and unicyclic graphs
, 2022 The sum-connectivity index of a graph G is defined as the sum of weights 1/root d(w) +d(z ) over all edges wz of G, where d(w) and d(z) are the degrees of the vertices w and z in G, respectively. In this paper, we provide a simpler method to the extremal
Shooshtari, Hajar +2 more
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On Topological Indices for New Classes of Benes Network
Journal of Mathematics, 2021 Topological indices (TIs) transform a molecular graph into a number. The TIs are a vital tool for quantitative structure activity relationship (QSAR) and quantity structure property relationship (QSPR).
Aftab Hussain +5 more
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Topological Descriptors of M-Carbon Mr,s,t
Journal of Chemistry, 2021 We have studied topological indices of the one the hardest crystal structures in a given chemical system, namely, M-carbon. These structures are based and obtained by the famous algorithm USPEX. The computations and applications of topological indices in
Hong Yang, Muhammad Naeem
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Bounds on the General Eccentric Connectivity Index
, 2022 The general eccentric connectivity index of a graph R is defined as ξec(R)=∑u∈V(G)d(u)ec(u)α, where α is any real number, ec(u) and d(u) represent the eccentricity and the degree of the vertex u in R, respectively.
Aisha Javed +4 more
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Multiplicative Attributes Derived from Graph Invariants for Saztec4 Diamond
Journal of Mathematics, 2022 This study consists of developing some closed and updated formulas derived from multiplicative graph invariants such as general Randic index GRIRλ0ϰ for λ0=±1,±1/2, ordinary general geometric-arithmetic (OGA), general version of harmonic index (GHI), sum
Muhammad Haroon Aftab +4 more
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