Browsing Mathematics, Statistics & Physics by Type "Conference"
Now showing items 1-20 of 60
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A framework for optimizing the supply chain performance of a steel producer
(2013 , Conference)Supply Chain Management (SCM) is focused on developing, optimizing, and operating efficient supply chains. Efficient supply chains are characterized by cost effective decisions, lean flow and structure, high degree of ... -
A new Tikhonov-TV regularization for optical flow computation
( SPIE , 2020 , Conference)Tikhonov regularization and total variation (TV) are two famous smoothing techniques used in variational image processing problems and in particular for optical flow computation. We consider a new method that combines these ... -
Adaptive and unequal probability survey designs for environmental management
( The Modelling and Simulation Society of Australia and New Zealand Inc , 2011 , Conference)Designing an efficient large-area survey is a challenge, especially in environmental science when many populations are rare and clustered. Adaptive and unequal probability sampling designs are appealing when populations ... -
An LP model for optimizing a supply chain management system for steel company
( Newswood Limited , 2014 , Conference)In this research, we have developed a linear programming formulation to describe Qatar steel manufacturing supply chain from suppliers to consumers. The purpose of the model is to provide answers regarding the optimal ... -
Aqueous electrolyte system for porous silicon using electrochemical anodization
( IEEE Xplore , 2013 , Conference)Electrochemical anodization on n-type silicon was performed with silicon as anode and platinum as cathode in a weak-acid aqueous electrolyte containing orthophosphoric acid and ammonium fluoride. Anodization was carried ... -
Artificial Neural Network versus Linear Models Forecasting Doha Stock Market
( Institute of Physics Publishing , 2018 , Conference)The purpose of this study is to determine the instability of Doha stock market and develop forecasting models. Linear time series models are used and compared with a nonlinear Artificial Neural Network (ANN) namely Multilayer ... -
Assessment of Student Learning Outcomes for Assurance of Learning at Qatar University
( Hamad bin Khalifa University Press (HBKU Press) , 2014 , Conference)From 2006 to 2012 Qatar University transitioned from doing no program level outcomes-based assessment of student learning to implementation of a robust, effective, and institutionally pervasive Student Learning Outcomes ... -
Asymptotic behaviour of contraction non-autonomous semi-flows in a Banach space: Application to first-order hyperbolic PDEs
( Elsevier Ltd , 2016 , Conference)The asymptotic behaviour is studied for a class of non-autonomous infinite-dimensional non-linear dissipative systems. This is achieved by using the concept of contraction semi-flow, which is a generalization of contraction ... -
Asymptotic stability of time-varying distributed parameter semi-linear systems
( IFAC , 2014 , Conference)The asymptotic behaviour is studied for a class of non-linear distributed parameter time-varying dissipative systems. This is achieved by using time-varying infinite-dimensional Banach state space description. Stability ... -
Boundary linear-quadratic control for a system of coupled parabolic-hyperbolic PDEs and ODE
( Institute of Electrical and Electronics Engineers Inc. , 2018 , Conference)The 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 ... -
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 ... -
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 ... -
Combined theoretical and experimental study of the transmission of tilted ion beams through macroscopic conical glass capillaries
( IOP Publishing , 2015 , Conference)The transmission as a function of the tilt angle of a 3 keV Ar+ ion beam through a conical macroscopic glass capillary is studied theoretically and experimentally. It was found that the charge patches which are responsible ... -
Compositional transformations in ion implanted polymers
( Elsevier , 2005 , Conference)Changes of surface layer composition produced by ion bombardment of polyethylene and polypropylene samples were studied. These materials are under consideration for load bearing surfaces in biological and technical ... -
Dimensional regularization of the spatial wave function for a singular contact interaction in the relativistic schrodinger equation
( Institute of Physics Publishing , 2016 , Conference)Based on our previous work in PRD 89, 125023 (2014), we stress here (for the first time) the regularization of the spatial wave function for the δ-contact interaction within the relativistic Schrodinger equation. The ... -
Effect of gamma irradiation on the microstructure and morphology of polyethylene oxide and polyvinyl alcohol blends
( Trans Tech Publications , 2010 , Conference)Thin films of a blend of 90, 75, 50 (wt/wt%) percentage of polyethylene oxide and polyvinyl alcohol were synthesized and irradiated with 5, 25, 50, 100 and 200 kGy. The presence of PVA leads to diffusion controlled mechanism ... -
Electron irradiated low-density polyethylene studied by positron annihilation lifetime spectroscopy
( Elsevier Ltd , 2003 , Conference)A study of the degree and rate of cross-linking of low-density polyethylene (LDPE) as a result of irradiation by high-energy electron beam has been performed using positron annihilation lifetime (PAL) technique. The PAL ... -
Electron-impact ionisation of Wq+ ions with 1 ≤ q ≤ 19
( IOP Publishing Ltd , 2020 , Conference)Synopsis Electron-impact ionisation cross sections of tungsten ions in the energy range from the ionisation threshold to 1000 eV were measured. The experimental cross sections are compared with results from sub-configuration ... -
Enhancing passive UHF RFID backscatter energy using chirp spread spectrum signals and channel shortening
( Institute of Electrical and Electronics Engineers Inc. , 2016 , Conference)Performance of passive ultrahigh frequency radio-frequency identification (UHF RFID) systems depends on the energy level of the backscattered signal from the RF tag to the RFID reader. In the indoor environment, the ... -
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 ...
