Search
Now showing items 4761-4770 of 4837
An automatic fast optimization of Quadratic Time-frequency Distribution using the hybrid genetic algorithm
(
Elsevier B.V.
, 2017 , Article)
This paper presents a novel framework for a fully automatic optimization of Quadratic Time-frequency Distributions (QTFDs). This ‘black box’ approach automatically adjusts the QTFD kernel parameters by using a hybrid genetic ...
Cure kinetics of epoxy/MWCNTs nanocomposites: Isothermal calorimetric and rheological analyses
(
Elsevier B.V.
, 2017 , Article)
A combinatorial route has been applied in cure kinetics study of epoxy nanocomposites containing multi-walled carbon nanotubes (MWCNTs) based on differential scanning calorimetry and rheokinetic analyses under isothermal ...
Investigation and performance analysis of water-diesel emulsion for improvement of performance and emission characteristics of partially premixed charge compression ignition (PPCCI) diesel engines
(
Elsevier Ltd
, 2019 , Article)
Partially premixed charge compression ignition (PPCCI) engine is a promising technique as compared with the conventional diesel engine. The present research paper shows the use of water-diesel emulsion at varying concentrations ...
Prevalence of microplastics in the marine waters of Qatar
(
Elsevier Ltd
, 2016 , Article)
Microplastics are firmly recognized as a ubiquitous and growing threat to marine biota and their associated marine habitats worldwide. The evidence of the prevalence of microplastics was documented for the first time in ...
Melt processing and properties of linear low density polyethylene-graphene nanoplatelet composites
(
Elsevier Ltd
, 2016 , Article)
Composites of Linear Low Density Polyethylene (LLDPE) and Graphene Nanoplatelets (GNPs) were processed using a twin screw extruder under different extrusion conditions. The effects of screw speed, feeder speed and GNP ...
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 ...
Tailoring optical absorption in silicon nanostructures from UV to visible light: A TDDFT study
(
Elsevier Ltd
, 2016 , Article)
The utilization of silicon nanostructures, from quantum dots to nanowires, for photovoltaic applications depends on understanding the effect of their physical structure on their optical absorption properties. In this work, ...
Modeling of dual-metal Schottky contacts based silicon micro and nano wire solar cells
(
Elsevier B.V.
, 2014 , Article)
We study solar cell properties of single silicon wires connected at their ends to two dissimilar metals of different work functions. Effects of wire dimensions, the work functions of the metals, and minority carrier lifetimes ...
Effect of outdoor temperature on the power-conversion efficiency of newly synthesized organic photosensitizer based dye-sensitized solar cells
(
Elsevier B.V.
, 2018 , Article)
In this work, organic photosensitizer has been synthesized for dye-sensitized solar cells (DSSCs). The solar cells then fabricated have been characterized by photocurrent-voltage characteristics and electrochemical impedance ...
Investigating the impact of dynamic merge control strategies on driving behavior on rural and urban expressways – A driving simulator study
(
Elsevier Ltd
, 2019 , Article)
Harsh decelerations and abrupt lane changes of drivers on the outer expressway lane in response to merging platoon vehicles from on-ramps increase the crash- and congestion risk on expressways. Several merge control ...