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Numerical study of atmospheric ice accretion on rotating geometric cross sections with fins 

Mughal, Umair Najeeb; Virk, Muhammad Shakeel (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-05-12)
This paper describes the numerical study of atmospheric ice accretion on rotating geometric cross sections, circular, hexagon and square , all having fins, to select an optimum geometric cross section for use as a rotating part of a newly- proposed designed icing sensor. Computational fluid dynamics-based numerical analyses were carried out in this research work to understand and analyse the ...
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Modeling Bottom-Up Visual Attention Using Dihedral Group D4 

Sharma, Puneet (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-08-15)
In this paper, first, we briefly describe the dihedral group D4 that serves as the basis for calculating saliency in our proposed model. Second, our saliency model makes two major changes in a latest state-of-the-art model known as group-based asymmetry. First, based on the properties of the dihedral group D4, we simplify the asymmetry calculations associated with the measurement of saliency. ...
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Multiphysics based Numerical Study of Atmospheric Ice Accretion on a Full Scale Horizontal Axis Wind Turbine Blade 

Virk, Muhammad Shakeel; Mughal, Umair Najeeb; Hu, Q; Jiang, X (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-08)
Atmospheric icing on wind turbines have been recognized as a hindrance to the development of the wind power in cold regions, where uncertainty surrounding the effects of icing on energy production may prevent otherwise good wind resources from being utilized. This research paper is focused on to numerically simulate the rate and shape of atmospheric ice accretion on a full-scale horizontal axis ...
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A field study of atmospheric icing analysis in a complex terrain of the high north 

Rashid, Taimur; Mughal, Umair Najeeb; Mustafa, Mohamad; Virk, Muhammad Shakeel (Journal article; Tidsskriftartikkel; Peer reviewed, 2014-12)
Analyses of atmospheric icing events hold the key for computing the significant parameters leading to icing load calculations. In the cold regions of the high north, atmospheric icing loads on structures become important when it comes to design and safety of infrastructures. Furthermore, icing load calculations over a certain period of time provide a vital input for designers to improve the ...
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Scenario-based approaches for handling uncertainty in MPC for power system frequency control 

Ersdal, Anne Mai; Imsland, Lars Struen (Journal article; Peer reviewed; Tidsskriftartikkel, 2017)
A stochastic nonlinear model predictive controller (SNMPC) is designed for automatic generator control of a proxy of the Nordic power system, and it is compared with a multi-stage nonlinear model predictive controller (MNMPC). Both controllers are scenario based, but originate in two different disturbance modeling paradigms; stochastic and deterministic. A simulation study indicates that the two ...
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Atmospheric ice monitoring system operation at Remote locations in cold region 

Virk, Muhammad Shakeel; Rashid, Taimur; Mustafa, Mohamad Y (Journal article; Peer reviewed; Tidsskriftartikkel, 2013)
The problems encountered in installation, maintenance and operations of equipment in the cold climate regions are far more complicated than others. The contributing factors and problems that can affect the system operation and performance should be identified, assessed and focused within well-defined parameters before its installation in cold climate regions. The harsh cold environment, could not ...
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Real-Time Particle Tracking using a Formation of UAVs 

Oland, Espen; Kristiansen, Raymond (Journal article; Peer reviewed; Tidsskriftartikkel, 2013)
In this paper the problem of real-time particle tracking is studied. Using sensor measurements, a formation of UAVs autonomously find the closest point with high particle density where they enter a holding pattern. After converging to the holding pattern, one UAV will remain, while the rest will go looking for other maxima. To avoid collisions between the UAVs during the mission, a controller is ...
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Simulation of the HDPE Pyrolysis Process 

Eidesen, Hans-Kristian; Khawaja, Hassan; Jackson, Steven (Journal article; Peer reviewed; Tidsskriftartikkel, 2018)
Pyrolysis is a thermochemical decomposition of organic compounds such as High-density polyethylene (HDPE) plastics. The product of the HDPE pyrolysis is usually diesel with other wastes (such as carbon black, etc.). A pyrolysis reaction is essentially a decomposition reaction performed at elevated temperatures in the absence of oxygen. There are many other complex reactions taking place in pyrolysis, ...
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State of the Art Review of Atmospheric Icing Sensors 

Mughal, Umair Najeeb; Virk, Muhammad Shakeel; Mustafa, Mohamad (Journal article; Peer reviewed; Tidsskriftartikkel, 2016-03-31)
A state of the art review of atmospheric icing sensors is presented in this article, in order to understand their design and working principle for future developments. It is found that most atmospheric icing sensors which are capable of delivering maximum information are based upon direct measurement of the physical properties (electrical or mechanical) of atmospheric ice. Some field measurements ...
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Periodic homogenization of nonlocal operators with a convolution-type kernel 

Piatnitski, Andrey; Zhizhina, Elena (Journal article; Peer reviewed; Tidsskriftartikkel, 2017)
The paper deals with a homogenization problem for a nonlocal linear operator with a kernel of convolution type in a medium with a periodic structure. We consider the natural diffusive scaling of this operator and study the limit behavior of the rescaled operators as the scaling parameter tends to 0. More precisely we show that in the topology of resolvent convergence the family of rescaled operators ...
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Filter by Date Issued2010 - 2020 (158)2009 - 2009 (1)Filter by Document TypeJournal article (159)
Tidsskriftartikkel (159)
Peer reviewed (155)Filter by AuthorPersson, Lars Erik (22)Mustafa, Mohamad (15)Virk, Muhammad Shakeel (12)Moatamedi, Mojtaba (11)Mughal, Umair Najeeb (10)Solvang, Wei Deng (10)Yu, Hao (10)Khawaja, Hassan (9)Lukkassen, Dag (9)Piatnitski, Andrey (9)... View More
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Munin is powered by DSpace

UiT The Arctic University of Norway
The University Library
uit.no/ub - munin@ub.uit.no