Mathematics, Statistics & Physics: Recent submissions
Now showing items 461-480 of 728
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Optimal linear–quadratic control of coupled parabolic–hyperbolic PDEs
( Taylor and Francis Ltd. , 2017 , Article)This paper focuses on the optimal control design for a system of coupled parabolic-hypebolic partial differential equations by using the infinite-dimensional state-space description and the corresponding operator Riccati ... -
Mixed EWMA-CUSUM and mixed CUSUM-EWMA modified control charts for monitoring first order autoregressive processes
( Taylor and Francis Ltd. , 2017 , Article)In practice most processes are known to produce autocorrelated observations. Autocorrelation degrades the performance of control charts by producing frequent false alarms when the process is stable or makes the charts ... -
Flow and heat transfer analysis of Jeffery nano fluid impinging obliquely over a stretched plate
( Taiwan Institute of Chemical Engineers , 2017 , Article)This study investigates the problem of oblique stagnation point flow using Jeffery nanofluid as a rheological fluid model. Effects of thermophoresis and Brownian motion are taken into account. The governing nonlinear partial ... -
Two-stage complete allocation sampling
( John Wiley and Sons Ltd , 2017 , Article)An adaptive sample involves modifying the sampling design on the basis of information obtained during the survey while remaining in the probability sampling framework. Complete allocation sampling is an efficient and easily ... -
Derivation of a new Merton's optimal problem presented by fractional stochastic stock price and its applications
( Elsevier Ltd , 2017 , Article)In this article, a new model of Merton's optimal problem is derived. This derivation is based on stock price presented by fractional order stochastic differential equation. An extension of Hamilton-Jacobi-Bellman is used ... -
Hydrogen Atom and Equivalent Form of the Levy-Leblond Equation
( Institute of Physics Publishing , 2017 , Article)We discuss the equivalent form of the Levy-Leblond equation such that the nilpotent matrices are two-dimensional. We show that this equation can be obtained in the non-relativistic limit of the (2+1)-dimensional Dirac ... -
Spinel ferrite nanoparticles for H2S gas sensor
( Springer Verlag , 2017 , Article)We investigate H2S gas sensors based on spinel ferrite CuFe2O4 nanoparticles prepared by the co-precipitation method. This technique is an efficient and fast technique to produce nanoparticles. Furthermore, those nanoparticles ... -
Moment invariants for multi-component shapes with applications to leaf classification
( Elsevier B.V. , 2017 , Article)In this paper we introduce seven new invariants for multi-component shapes, and apply them to the leaf classification problem. One of the new invariants is an area based analogue of the already known boundary based anisotropy ... -
Fabrication and characterization of flexible ruthenium oxide-loaded polyaniline/poly(vinyl alcohol) nanofibers
( Wiley , 2020 , Article)© 2020 Wiley Periodicals, Inc. Polyaniline/poly(vinyl alcohol)/ruthenium oxide (RuO2) composite nanofibers were produced by electrospinning technique. Hydrous ruthenium chloride was used as a precursor at different ... -
DNA sequencing via Z-shaped graphene nano ribbon field effect transistor decorated with nanoparticles using first-principle transport simulations
( IOP Publishing , 2020 , Article)© 2020 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft. DNA detection has revolutionized medical and biological research fields. It provides a ... -
Enhancing the Sensing Performance of Zigzag Graphene Nanoribbon to Detect NO, NO, and NH Gases.
( MDPI , 2020 , Article)In this article, a zigzag graphene nanoribbon (ZGNR)-based sensor was built utilizing the Atomistic ToolKit Virtual NanoLab (ATK-VNL), and used to detect nitric oxide (NO), nitrogen dioxide (NO), and ammonia (NH). The ... -
Nanostructured Metal Oxide-Based Acetone Gas Sensors: A Review.
( MDPI , 2020 , Article Review)Acetone is a well-known volatile organic compound that is widely used in different industrial and domestic areas. However, it can have dangerous effects on human life and health. Thus, the realization of sensitive and ... -
CO, CO2, and SO2 detection based on functionalized graphene nanoribbons: First principles study
( Elsevier , 2020 , Article)In this study, density functional theory (DFT) has been used to build armchair graphene nanoribbon (AGNR) gas sensor and study its capacity to detect carbon monoxide (CO), carbon dioxide (CO2), and sulfur dioxide (SO2) ... -
Fabrication of H2S gas sensors using ZnxCu1-xFe2O4 nanoparticles
( Springer , 2020 , Article)Spinel ferrite nanoparticles can be easily retrieved and utilized for multiple cycles due to their magnetic properties. In this work, nanoparticles of a ZnxCu1-xFe2O4 composition were synthesized by employing a sol–gel ... -
Production of flexible nanocomposite membranes for x-ray detectors
( Elsevier , 2020 , Article)Flexible membranes of poly(vinyl alcohol) (PVA) polymer and CuO nanoparticles for x-ray detection applications are reported in this work. PVA represents a polymer matrix for nanoparticles, and its flexibility and electrical ... -
DFT investigation of H2S adsorption on graphenenanosheets and nanoribbons: Comparative study
( Elsevier , 2020 , Article)Graphenenanosheet (GNS), armchair graphenenanoribbon (AGNR), and zigzag graphenenanoribbon (ZGNR) systems were investigated by first principle calculations using the density functional theory (DFT). The DFT calculations ... -
First principle investigation of H2Se, H2Te and PH3 sensing based on graphene oxide
( Elsevier , 2020 , Article)Detecting toxic gases is of great importance to protect our health and preserve the quality of life. In this work, graphene (G) and graphene oxide with three different modifications (G–O, G–OH, and G–O–OH) have been used ... -
Pt-doped armchair graphene nanoribbon as a promising gas sensor for CO and CO2: DFT study
( Elsevier , 2021 , Article)In this work, four armchair graphene nanoribbon (AGNR) based sensor materials were built using Atomistic ToolKit Virtual NanoLab (ATK-VNL) and utilized to detect carbon monoxide (CO) and carbon dioxide (CO2) gases. First, ... -
Photocatalytic activity of transition metal ions-loaded activated carbon: Degradation of crystal violet dye under solar radiation
( Elsevier Ltd , 2017 , Article)In this work, activated carbon (AC) was prepared from date palm stone by chemical activation method. Its properties were investigated, the surface of the AC was found to be acidic (pHpzc of 3.95), Brunauer-Emmet-Teller ... -
Erratum to: Two-stage complete allocation sampling (Environmetrics, (2017), 28, 3, (e2441), 10.1002/env.2441)
( John Wiley and Sons Ltd , 2017 , Other)This article corrects: Salehi MM, Seber GAF. Two-stage complete allocation sampling. Environmetrics. 2017;28:e2441. https://doi.org/10.1002/env.2441. The main correction is on the introduced unbiased estimator of the ...