Mathematics, Statistics & Physics: المرسلات الحديثة
السجلات المعروضة 141 -- 160 من 814
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Co-doped zigzag graphene nanoribbon based gas sensor for sensitive detection of H2S: DFT study
( Academic Press , 2021 , Article)In this work, we present a highly sensitive gas sensor for the detection of poisonous hydrogen sulfide gas (H2S) based on copper and zinc co-doped zigzag graphene nanoribbon (Cu/Zn-ZGNR). The electronic properties as well ... -
Computational study of metal doped graphene nanoribbon as a potential platform for detection of H2S
( Elsevier Ltd , 2021 , Article)Theoretical investigation for detection of hydrogen sulfide (H2S) gas using hydrogen/nitrogen-terminated armchair graphene nanoribbon (HAGNR and NAGNR) doped with Pt is presented in this study. The investigation was ... -
First principle study of transition metals codoped MoS2 as a gas sensor for the detection of NO and NO2 gases
( Elsevier B.V. , 2021 , Article)Exposure to nitrogen oxides (NOx) has been reported to seriously affect the respiratory systems. More precisely, breathing NOx may lead to the appearance of asthma symptoms, and may also result in the infection with asthma ... -
Sensitive SO2 gas sensor utilizing Pt-doped graphene nanoribbon: First principles investigation
( Elsevier Ltd , 2021 , Article)The objective of this work is to seek a highly sensitive gas sensor for the detection of sulfur dioxide (SO2) by investigating the impacts of passivation as well as metal doping of armchair-edge graphene nanoribbon (AGNR) ... -
Application of artificial intelligence and gamma attenuation techniques for predicting gas-oil-water volume fraction in annular regime of three-phase flow independent of oil pipeline's scale layer
( MDPI AG , 2021 , Article)To the best knowledge of the authors, in former studies in the field of measuring volume fraction of gas, oil, and water components in a three-phase flow using gamma radiation technique, the existence of a scale layer has ... -
A image encryption algorithm based on chaotic Lorenz system and novel primitive polynomial S-boxes
( Springer , 2021 , Article)We have proposed a robust, secure and efficient image encryption algorithm based on chaotic maps and algebraic structure. Nowadays, the chaotic cryptosystems gained more attention due to their efficiency, the assurance of ... -
Cryptanalysis of nonlinear confusion component based encryption algorithm
( Elsevier , 2021 , Article)Recently many substitution box based encryption algorithms ensuring privacy have been proposed. Many, chaotic map based S-boxes have been generated posing high nonlinearity and strong cryptographic properties. Encryption ... -
Boundary optimal control of coupled parabolic PDE-ODE systems
( IFAC Secretariat , 2014 , Conference)This paper deals with boundary optimal control problem for coupled parabolic PDEODE systems. The problem is studied using infinite-dimensional state space representation of the coupled PDE-ODE system. Linearization of the ... -
Duality-based optimal compensator for boundary control hyperbolic PDEs system: Application to a tubular cracking reactor
( Elsevier , 2020 , Article)This paper is devoted to the design of an optimal stabilizing compensator for a boundary control distributed parameter system that is described by a set of hyperbolic partial differential equations (PDEs). The standard ... -
Boundary optimal control design for a system of parabolic-hyperbolic PDEs coupled with an ODE
( Taylor and Francis Ltd. , 2020 , Article)This paper deals with the design of a boundary optimal controller for a general model of parabolic-hyperbolic PDEs coupled with an ODE. The augmented infinite-dimensional state-space representation has been used in order ... -
Control of parabolic PDEs with time-varying spatial domain: Czochralski crystal growth process
( Taylor and Francis Ltd. , 2013 , Article)This paper considers the optimal control problem for a class of convection-diffusion-reaction systems modelled by partial differential equations (PDEs) defined on time-varying spatial domains. The class of PDEs is characterised ... -
Optimal control of an advection-dominated catalytic fixed-bed reactor with catalyst deactivation
( Elsevier , 2013 , Article)The paper focuses on the linear-quadratic control problem for a time-varying partial differential equation model of a catalytic fixed-bed reactor. The classical Riccati equation approach, for time-varying infinite-dimensional ... -
Model predictive control of selective catalytic reduction in diesel-powered vehicles
( Institute of Electrical and Electronics Engineers Inc. , 2015 , Conference)This paper proposes a method to synthesize an optimal controller for the SCR section of the diesel exhaust after-treatment system, which is based on a system model consisting of coupled hyperbolic and parabolic partial ... -
Optimal boundary control of coupled parabolic PDE-ODE systems using infinite-dimensional representation
( Elsevier , 2015 , Article)The optimal boundary control problem is studied for coupled parabolic PDE-ODE systems. The linear quadratic method is used and exploits an infinite-dimensional state-space representation of the coupled PDE-ODE system. ... -
Observer design for hyperbolic PDEs system with application to a fixed-bed chemical reactor model
( Institute of Electrical and Electronics Engineers Inc. , 2020 , Conference)This work is devoted to the development of an optimal infinite-dimensional Luenberger observer for a system of hyperbolic PDEs. For this purpose, the duality fact linking the control design and the observer design is used. ... -
Single-step feedback linearization with assignable dynamics for hyperbolic PDE
( Institute of Electrical and Electronics Engineers Inc. , 2015 , Conference)The present work proposes an extension of single-step feedback linearization with pole-placement formulation to the class of nonlinear hyperbolic systems. In particular, the mathematical formulation in the context of ... -
Spectral-based optimal output-feedback boundary control of a cracking catalytic reactor PDE model
( Taylor and Francis Ltd. , 2024 , Article)This research paper focuses on the design of a boundary optimal controller with output feedback for a tubular catalytic cracking reactor. The process is represented by a set of non-linear parabolic partial differential ... -
Boundary Output-Feedback Regulation of a Catalytic Cracking Reactor
( Institute of Electrical and Electronics Engineers Inc. , 2023 , Conference)This work focuses on the design of a boundary output feedback regulator for a catalytic cracking reactor model which can be represented by a set of partial differential equations (PDEs). Based on the linear abstract ... -
Error-feedback regulation of a distributed parameter cracking process by using a spectral approach
( Institute of Electrical and Electronics Engineers Inc. , 2023 , Conference)The paper focuses on controlling a distributed parameter cracking process using state and error feedback regulators. The principal aim is to accomplish tracking of a desired output while effectively managing disturbances ... -
Optimal output-feedback temperature regulation of a catalytic reverse flow reactor PDEs model
( Elsevier , 2021 , Article)In this work, control and estimation problems have been studied for a catalytic reversal flow reactor (CFRR). A stabilizing compensator is developed on the basis of the infinite-dimensional state-space description of the ...
