Results 31 to 40 of about 5,776,880 (162)

On topological properties of block shift and hierarchical hypercube networks

Open Physics, 2018
Networks play an important role in electrical and electronic engineering. It depends on what area of electrical and electronic engineering, for example there is a lot more abstract mathematics in communication theory and signal processing and networking ...
Guirao Juan Luis García, Siddiqui Muhammad Kamran, Hussain Asif   +2 more
doaj   +1 more source

Reverse Zagreb and Reverse Hyper-Zagreb Indices for Crystallographic Structure of Molecules

Journal of Chemistry, 2020
In the fields of chemical graph theory, topological index is a type of a molecular descriptor that is calculated based on the graph of a chemical compound.
Zhen Wang, Faryal Chaudhry, Maria Naseem, Adnan Asghar   +3 more
doaj   +1 more source

Topological Properties of Nanostar Dendrimer and Smart Polymer

Journal of Chemistry, 2020
The nanostar dendrimers are a piece of another gathering of macromolecules that seem, by all accounts, to be photon pipes simply like counterfeit reception apparatuses.
Muhammad Aamer Rashid, Sarfraz Ahmad, Murat Cancan, Mehwish Hussain Muhammad   +3 more
doaj   +1 more source

Computing Topological Descriptors and Polynomials of Certain 2D Chemical Structures

Journal of Chemistry, 2021
In the fields of mathematical chemistry, a topological index, also known as a connectivity index, is a type of a molecular descriptor that is calculated based on the molecular graph of a chemical compound.
Muhammad Mubashir Izhar, Zahida Perveen, Dalal Alrowaili, Mehran Azeem, Imran Siddique, Shahid Imran, Muhammad Shoaib Sardar   +6 more
doaj   +1 more source

A note on multiplicative sum Zagreb index [PDF]

, 2020
For a nontrivial (molecular) graph G, its multiplicative sum Zagreb index, denoted by π * 1 (G), is defined as the product of the sum is the degree of vertex u.
J South Asian, Math, Zagreb Index
core  

Topological Study of Zeolite Socony Mobil-5 via Degree-Based Topological Indices

Journal of Chemistry, 2021
Graph theory is a subdivision of discrete mathematics. In graph theory, a graph is made up of vertices connected through edges. Topological indices are numerical parameters or descriptors of graph.
Nouman Saeed, Kai Long, Tanweer Ul Islam, Zeeshan Saleem Mufti, Ayesha Abbas   +4 more
doaj   +1 more source

On Generalized Topological Indices of Silicon-Carbon

Journal of Mathematics, 2020
Let Gbe a graph with n vertices and Γu be the degree of its u-th vertex (Γx is the degree of u). In this article, we compute the generalization of Zagreb index, the generalized Zagreb index, the first and second hyper F-indices, the sum connectivity F ...
Xing-Long Wang, Jia-Bao Liu, Akbar Jahanbani, Muhammad Kamran Siddiqui, Nader Jafari Rad, Roslan Hasni   +5 more
doaj   +1 more source

Accidents in the Chemical Industry: A Scoping Review Focused on Causal Factors

American Journal of Industrial Medicine, EarlyView.
ABSTRACT Background Although occupational safety in the chemical industry is an area of ongoing research worldwide, chemical incidents continue to occur, indicating the need to review the causes, assist in safety management, and identify problems in the quality of reporting. Methods A systematic search of studies published in English between January 1,
Željka Babić, Emin Veledar, Zrinka Franić, Franka Šakić, Mojca Dobaja Borak, Lucija Šarc, Jelena Macan, Miran Brvar   +7 more
wiley   +1 more source

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, Kai Long, Zeeshan Saleem Mufti, Hafsa Sajid, Abdul Rehman   +4 more
doaj   +1 more source

First Leap Zagreb & First Leap Hyper Zagreb Entropy values for F_r.

, 2023
First Leap Zagreb & First Leap Hyper Zagreb Entropy values for Fr.
Mehar Ali Malik (17364518), Muhammad Imran (282621), Muhammad Adeel (1735018)   +2 more
core   +1 more source