Results 21 to 30 of about 2,335,527 (360)

Thermal and Chemical Characterization of Kenaf Fiber (Hibiscus cannabinus) Reinforced Epoxy Matrix Composites

open access: yesPolymers, 2021
Kenaf (Hibiscus cannabinus L.) is one of the most investigated and industrially applied natural fibers for polymer composite reinforcement. However, relatively limited information is available regarding its epoxy composites.
T. T. Silva   +6 more
semanticscholar   +1 more source

Characterization of Surface Modified Phoenix sp. Fibers for Composite Reinforcement

open access: yesJournal of Natural Fibers, 2021
This paper reports the morphological, physical, chemical, mechanical and thermal properties of untreated and various chemically treated natural fibers extracted from the petioles of the Phoenix sp. plants.
G. Rajeshkumar
doaj   +1 more source

Difficulties in the Production of Ausferritic Nodular Cast Iron without Heat Treatment [PDF]

open access: yesArchives of Foundry Engineering, 2023
The paper presents results of tests carried out on ausferrite carbide matrix alloyed ductile cast iron. The ausferrite was obtained via addition of Cu and Mo alloying elements. This eliminated heat treatment from the alloy production cycle.
M. Stawarz, M. Lenert, K. Piasecki
doaj   +1 more source

Avoiding matrix exponentials for large transition rate matrices [PDF]

open access: yesJ. Chem. Phys. 160, 094109 (2024), 2023
Exact methods for exponentiation of matrices of dimension $N$ can be computationally expensive in terms of execution time ($N^{3}$) and memory requirements ($N^{2}$) not to mention numerical precision issues. A type of matrix often exponentiated in the sciences is the rate matrix. Here we explore five methods to exponentiate rate matrices some of which
arxiv   +1 more source

Environmental Impact Assessment of Granite and Marble stone quarries Using RIAM and Iranian Leopold Matrix Methods [PDF]

open access: yesPizhūhish dar Bihdāsht-i Muḥīṭ., 2020
Background and Aim:Regardless of the positive economic effects, the adverse environmental impacts of mines make it necessary to assess environmental impacts.
zohre rahnamabargard   +3 more
doaj   +1 more source

Graphene Oxide Derivatives and Their Nanohybrid Structures for Laser Desorption/Ionization Time-of-Flight Mass Spectrometry Analysis of Small Molecules

open access: yesNanomaterials, 2021
Matrix-assisted laser desorption/ionization (MALDI) has been considered as one of the most powerful analytical tools for mass spectrometry (MS) analysis of large molecular weight compounds such as proteins, nucleic acids, and synthetic polymers thanks to
Seung-Woo Kim   +2 more
doaj   +1 more source

Rate Constant Matrix Contraction Method for Systematic Analysis of Reaction Path Networks

open access: yesChemistry Letters, 2020
This paper reviews the rate constant matrix contraction (RCMC) method, a kinetics-based graph clustering approach developed for the network of paths of chemical reaction elementary steps.
Y. Sumiya, S. Maeda
semanticscholar   +1 more source

The Risk Assessment System of Chemical Industry Park based on Analytic Hierarchy Process

open access: yesChemical Engineering Transactions, 2017
The research on risk control of chemical industrial park is one of the most important research contents in the management of chemical enterprises. As the chemical industry park is a very complex system, the risk control involves many problems, and it is ...
Qian Liang, Yujie He
doaj   +1 more source

Impact of Chemical Treatment on Surface Modification of Agave Americana Fibres for Composite Application – A Futuristic Approach

open access: yesJournal of Natural Fibers, 2023
As a futuristic approach an attempt has been made in this study to improve the compatibility between reinforcement and polymer matrix in composites by various chemical treatments.
S. Thamarai Selvi   +3 more
doaj   +1 more source

Approximate Exponential Algorithms to Solve the Chemical Master Equation [PDF]

open access: yesMathematical Modelling And Analysis Vol. 20 , Iss. 3,2015, 2014
This paper discusses new simulation algorithms for stochastic chemical kinetics that exploit the linearity of the chemical master equation and its matrix exponential exact solution. These algorithms make use of various approximations of the matrix exponential to evolve probability densities in time.
arxiv   +1 more source

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