Results 31 to 40 of about 3,238 (232)
Novel Face Index for Benzenoid Hydrocarbons
, 2020 A novel topological index, the face index ( F I ), is proposed in this paper. For a molecular graph G, face index is defined as F I ( G ) = ∑ f ∈ F ( G ) d ( f ) = ∑ v ∼ f , f ∈ F ( G ) d ( v ) , where
Kanza Abdul Sattar +2 more
core +1 more source
On the multiplicative sum Zagreb index of molecular graphs
Open MathematicsMultiplicative sum Zagreb index is a modified version of the famous Zagreb indices. For a graph GG, the multiplicative sum Zagreb index is defined as Π1*(G)=∏uv∈E(G)(dG(u)+dG(v)){\Pi }_{1}^{* }\left(G)={\prod }_{uv\in E\left(G)}\left({d}_{G}\left(u)+{d}_{
Sun Xiaoling, Du Jianwei, Mei Yinzhen
doaj +1 more source
Advanced Engineering Materials, EarlyView.Scandium (Sc)‐doped AlCoCrFeMo HEA coatings are fabricated via flame spraying with 0.1, 0.3, and 0.5 wt% Sc additions. Among these, the HEA‐Sc0.3 coating exhibits the highest corrosion resistance, indicated by a more positive corrosion potential and lower current density.
Pankaj Kumar +7 more
wiley +1 more source
Topological indices of the wreath product of graphs
, 2023 Topological indices, i.e., numerical invariants suitably associated to graphs and only depending upon their isomorphismtype, have important applications in Chemistry. Their computation constitutes an important branch of Chemical Graph Theory.
Jianfeng Wang +2 more
core +1 more source
Advanced Functional Materials, EarlyView.Edible electronics needs integrated logic circuits for computation and control. This work presents a potentially edible printed chitosan‐gated transistor with a design optimized for integration in circuits. Its implementation in integrated logic gates and circuits operating at low voltage (0.7 V) is demonstrated, as well as the compatibility with an ...
Giulia Coco +8 more
wiley +1 more source
Vertex PI index of V-phenylenic nanotubes and nanotori [PDF]
, 2009 In series of papers, P.V. Khadikar introduced a new topological index and named it as Padmakar-Ivan (PI) Index. This index is found very useful in nano technology, particularly in making and characterizing carbon nanotubes and nanotori. In this paper the
A Bahrami, J Yazdani
core
Vertex and edge PI indices of Cartesian product graphs
, 2007 The Padmakar–Ivan (PI) index of a graph G is the sum over all edges uv of G of the number of edges which are not equidistant from u and v. In this paper, the notion of vertex PI index of a graph is introduced.
M.H. Khalifeh +5 more
core +1 more source
Gromov Product Structures, Quadrangle Structures and Split Metric Spaces
, 2021 Let (X,d) be a finite metric space with elements Pi, i=1,…,n and with distances dij≔d(Pi,Pj) for i,j=1,…,n. The “Gromov product” Δijk, is defined as [Formula presented]. (X,d) is called Δ-generic, if, for each fixed i, the set of Gromov products Δijk has
Rezaeinazhad, Arash Mohammadian +3 more
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Vertex version of pi index of polycyclic aromatic hydrocarbons PAHK
, 2016 Let G=(V,E) be a simple connected molecular graph. Khadikar et.al. introduced the PI index defined by , where is the number of vertices of G lying closer to u and is the number of vertices of G lying closer to v. In this paper, we compute a closed formula of vertex PI index for Polycyclic Aromatic hydrocarbons.
Mohammad R. Farahani +3 more
openaire +1 more source
Chiral Phase Change Nanomaterials
Advanced Functional Materials, EarlyView.This work demonstrates reversible, non‐volatile phase transitions in chiral Ge2${\rm Ge}_2$Sb2${\rm Sb}_2$Te5${\rm Te}_5$ (GST) nanohelices for high‐speed optical modulation of chirality and dynamic control of the state of polarization (SOP). The chiral nanostructures are fabricated using a highly directional, wafer‐scale physical vapor deposition ...
Joshua A. Burrow +11 more
wiley +1 more source