Browsing Qatar University Institutional Repository by Title
Now showing items 15511-15530 of 27275
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Optimization of energy pile conductance using finite element and fractional factorial design of experiment
( Springer Verlag , 2019 , Book chapter)In Ground Source Heat Pumps (GSHP), Energy Piles pose as heat exchangers that transfer the heat from the buildings to the shallow ground lower temperature in order to decrease the energy consumption whilst cooling the ... -
Optimization of energy pile conductance using finite element and fractional factorial design of experiment
( Institute of Physics Publishing , 2018 , Conference Paper)In Ground Source Heat Pumps (GSHP), Energy Piles pose as heat exchangers that transfer the heat from the buildings to the shallow ground lower temperature in order to decrease the energy consumption whilst cooling the ... -
Optimization of iron dosage for microalgal biomass production as a feedstock for biofuel
( Taylor and Francis Ltd. , 2019 , Article)Summary: Biomass and metabolite production of three marine (Tetraselmis sp., Nannochloropsis sp., Chlorocystis sp.) and three freshwater microalgae (Scenedesmus sp., Chlorella sp., Monoraphidium sp.) were studied under ... -
Optimization of ITO glass/TiO2 based DSSC photo-anodes through electrophoretic deposition and sintering techniques
( Elsevier Ltd , 2017 , Article)In the current study, TiO2 layers were deposited onto Indium Tin Oxide (ITO) coated glass substrates at varied voltage levels ranging from 2.5 VDC to 7.5 VDC, using Electrophoretic deposition (EPD) process. Subsequently, ... -
Optimization of linear zigzag insert metastructures for low-frequency vibration attenuation using genetic algorithms
( Academic Press , 2017 , Article)Vibration suppression remains a crucial issue in the design of structures and machines. Recent studies have shown that with the use of metamaterial inspired structures (or metastructures), considerable vibration attenuation ... -
Optimization of lycopene extraction from tomato peels industrial by-product using maceration in refined olive oil
( Institution of Chemical Engineers , 2019 , Article)Lycopene, a nutraceutical compound, was extracted from a Tunisian industrial tomato peels by-product using maceration in refined olive oil (ROO). To do, a Box–Behnken design was applied to maximize the lycopene recovery ... -
Optimization of magnesium recovery from reject brine for reuse in desalination post-treatment
( Elsevier Ltd , 2019 , Article)In this work, the recovery of magnesium from desalination reject brine through reaction with ammonia has been evaluated and statistically optimized using response surface methodology. The process is based on precipitation ... -
Optimization of magnetic nanoparticles draw solution for high water flux in forward osmosis
( MDPI , 2021 , Article)In this study, bare iron oxide nanoparticles were synthesized using a co-precipitation method and used as a draw solute in forward osmosis. The synthesis conditions of the nanoparticles were optimized using the Box-Behnken ... -
Optimization of multiple fuel utilization options in Tri-generation systems
( Elsevier , 2023 , Article)This work investigates the design of optimal tri-generation systems for heat, power and water production via multiple fuel selections, thus aiming to reduce the reliance on fossil fuel consumption. Generally speaking, ... -
Optimization of nickel oxide nanoparticle synthesis through the sol-gel method using Box-Behnken design
( Elsevier BV , 2015 , Article)In this study, nickel oxide nanoparticles were prepared using the sol-gel method. The process parameters were optimized to produce smaller size of nanoparticles such as molar ratio, solution pH and calcination temperatures. ... -
Optimization of performance and emission characteristics of CI engine fueled with Jatropha biodiesel produced using a heterogeneous catalyst (CaO)
( Elsevier Ltd , 2020 , Article)This study includes the use of heterogeneous catalyst (CaO) for the production of Jatropha biodiesel through transesterification reaction. The heterogeneous transesterification delivered a yield of 81.6% at 5 wt% catalyst ... -
Optimization of physicochemical and dielectric features in the conductive copolymers of aniline and 2-aminophenol
( Springer Verlag , 2019 , Article)The current exploration emphasizes improving the solubility and thermal characteristics of the homopolymers–polyaniline and poly-2-aminophenol via copolymerization technique with simultaneous optimization of conductivity ... -
Optimization of piezoelectric sensor-actuator for plate vibration control using evolutionary computation: Modeling, simulation and experimentation
( Institute of Electrical and Electronics Engineers Inc. , 2021 , Article)The development of lightweight, stronger, and more flexible structures has received the utmost interest from many researchers. For this reason, piezoelectric materials, with their inherent electromechanical coupling, have ... -
Optimization of Polyacrylic Acid Coating on Graphene Oxide-Functionalized Reverse-Osmosis Membrane Using UV Radiation through Response Surface Methodology
( MDPI , 2022 , Article)Reverse osmosis (RO) is affected by multiple types of fouling such as biofouling, scaling, and organic fouling. Therefore, a multi-functional membrane capable of reducing more than one type of fouling is a need of the hour. ... -
Optimization of probability of error in collaborative spectrum sensing of time-limited cognitive radio networks
( Institute of Electrical and Electronics Engineers Inc. , 2016 , Conference Paper)We study the probability of error optimization problem in collaborative spectrum sensing (CSS) with limited time resources in cognitive radio (CR) networks. The frame structures for sensing and data transmission, if the ... -
Optimization of reliability and maintenance of liquefaction system on FLNG terminals using Markov modelling
( Emerald Group Publishing Ltd. , 2014 , Article)Purpose: The purpose of this paper is to optimize system redundancy and maintenance intervals of a propane pre-cooled mixed refrigerant (C3MR) liquefaction process on floating liquefied natural gas (FLNG) export platforms. ... -
Optimization of selection of chain amine scrubbers for CO2 capture
( Springer Verlag , 2014 , Article)In order to optimize the selection of a suitable amine molecule for CO2 scrubbers, a series of ab initio calculations were performed at the B3LYP/6-31+G(d,p) level of theory. Diethylenetriamine was used as a simple chain ... -
Optimization of Sink Locations in Carbon Integration Networks
( Elsevier B.V. , 2022 , Book chapter)The detrimental environmental impacts of climate change that are a result of high atmospheric CO2 concentrations have prompted global efforts to limit the continuous increase in greenhouse gas (GHG) emissions. Many are now ... -
Optimization of steady-state and dynamic performances of water–gas shift reaction in membrane reactor
( Institution of Chemical Engineers , 2018 , Article)© 2018 Institution of Chemical Engineers Membrane rector technology has been increasingly recognized as a promising solution to produce high-purity hydrogen and to support future realization of hydrogen economy. Although ... -
Optimization of tank engine crank shaft material properties
( Taylor and Francis Ltd. , 2023 , Article)Metals and coating materials, with best material properties are highly desired in the field of engineering to control the stresses and strains, that play important role in design strategies. The crankshaft, an important ...
