تصفح Mathematics, Statistics & Physics حسب العنوان
السجلات المعروضة 384 -- 403 من 728
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Koopman Operator Approximation Under Negative Imaginary Constraints
( Institute of Electrical and Electronics Engineers Inc. , 2023 , Article)Nonlinear Negative Imaginary (NI) systems arise in various engineering applications, such as controlling flexible structures and air vehicles. However, unlike linear NI systems, their theory is not well-developed. In this ... -
Kynurenine 3-Monooxygenase gene associated with Nicotine initiation and addiction: Analysis of novel regulatory features at 5' and 3'-Regions
( Frontiers Media S.A. , 2018 , Article)© 2018 Aziz, Abdel-Salam, Al-Obaide, Alobydi and Al-Humaish. Tobacco smoking is widespread behavior in Qatar and worldwide and is considered one of the major preventable causes of ill health and death. Nicotine is part of ... -
Large sample and bootstrap intervals for the gamma scale parameter based on grouped data
( Wayne State University , 2006 , Article)Interval estimation of the scale parameter of the gamma distribution using grouped data is considered in this article. Exact intervals do not exist and approximate intervals are needed Recently, Chen and Mi (2001) proposed ... -
Large-scale global optimization based on hybrid swarm intelligence algorithm
( IOS Press , 2020 , Article)There are numerous large-scale global optimization problems encountered in real-world applications including engineering, manufacturing, economics, networking fields. Over the last two decades different varieties of swarm ... -
Large-Scale Swarm Control in Cluttered Environments
( Springer Science and Business Media Deutschland GmbH , 2024 , Conference Paper)In the evolving era of social robots, managing a swarm of autonomous agents to perform particular tasks has become essential for numerous industries. The task becomes more challenging for large-scale swarms and complex ... -
Least-squares spectral methods for ODE eigenvalue problems
( Society for Industrial and Applied Mathematics , 2022 , Article)We develop spectral methods for ODEs and operator eigenvalue problems that are based on a least-squares formulation of the problem. The key tool is a method for rectangular generalized eigenvalue problems, which we extend ... -
Level sets of potential functions bisecting unbounded quadrilaterals
( Springer Nature , 2022 , Article)We study the mixed Dirichlet–Neumann problem for the Laplace equation in the complement of a bounded convex polygonal quadrilateral in the extended complex plane. The Dirichlet / Neumann conditions at opposite pairs of ... -
Likelihood and Bayesian estimation of using lower record values from the generalized exponential distribution
( Elsevier Ltd , 2007 , Article)We consider the likelihood and Bayesian estimation of the stress-strength reliability based on lower record values from the generalized exponential distribution. The estimators are derived and their properties are studied. ... -
Likelihood and Bayesian Inference in the Lomax Distribution under Progressive Censoring
( Horizon Research Publishing(HRPUB) , 2022 , Article)The Lomax distribution has been used as a statistical model in several fields, especially for business failure data and reliability engineering. Accurate parameter estimation is very important because it is the base for ... -
Linear hydrogen gas sensors based on bimetallic nanoclusters
( Elsevier Ltd , 2016 , Article)This work reports on the fabrication of hydrogen gas sensors based on bimetallic palladium-copper nanoclusters. The nanoclusters were generated by sputtering and inert-gas condensation inside an ultra-high vacuum (UHV) ... -
Linear profile monitoring using EWMA structure under ranked set schemes
( Springer London , 2017 , Article)In many manufacturing processes, study variable is not the only quality characteristic, but there may exist some explanatory variable(s) that are associated with the study variable. This association may be linear or nonlinear ... -
Linearization of third-order ordinary differential equations u'''=f(x,u,u',u') via point transformations
( John Wiley and Sons Ltd , 2018 , Article)The linearization problem for scalar third-order ordinary differential equations via point transformations was solved partially in the works of Al-Dweik et al by the use of the Cartan equivalence method. In order to solve ... -
Loading Rates of Dust and Metals in Residential Houses of Arid and Dry Climatic Regions
( Taiwan Association for Aerosol Research , 2016 , Article)Dust samples were collected from 38 naturally ventilated houses for 12 weeks. Effects of three variables in two groups each were evaluated: proximity to traffic density (main- and side-roads), cigarettes smoking (smoking ... -
Location charts based on ranked set sampling for normal and non-normal processes
( John Wiley and Sons Ltd , 2019 , Article)Control charts, based on ranked set sampling schemes, had been proposed recently for efficient monitoring of process location. All the proposals in the literature are based on the ideal assumption of normally distributed ... -
Logarithmic Bounds for Oscillatory Singular Integrals on Hardy Spaces
( Hindawi Publishing Corporation , 2016 , Article)We establish a logarithmic bound for oscillatory singular integrals with quadratic phases on the Hardy space H 1 (R n). The logarithmic rate of growth is the best possible. 2016 Hussain Al-Qassem et al. -
Long-term COVID-19 booster effectiveness by infection history and clinical vulnerability and immune imprinting: a retrospective population-based cohort study
( Elsevier , 2023 , Article)BackgroundLong-term effectiveness of COVID-19 mRNA boosters in populations with different previous infection histories and clinical vulnerability profiles is inadequately understood. We aimed to investigate the effectiveness ... -
LQ (optimal) control of hyperbolic PDAEs
( Taylor and Francis Ltd. , 2014 , Article)The linear quadratic control synthesis for a set of coupled first-order hyperbolic partial differential and algebraic equations is presented by using the infinite-dimensional Hilbert state-space representation of the system ... -
A Magnetic Transport Middle Eastern Positron Beam
( Elsevier , 2008 , Article)A magnetically guided slow positron beam is being constructed at Qatar University and is currently being optimised for regular operation. This is the first positron beam in the Middle East, as well as being the first Arabic ... -
Majorana fermions in a box
( American Physical Society , 2017 , Article)Motivated by potential applications to ultracold matter, we perform a theoretical study of Majorana fermions confined to a finite volume, whose boundary conditions are characterized by self-adjoint extension parameters. ... -
Mass problems and density
( World Scientific Publishing Co. Pte Ltd , 2016 , Article)Recall that Ew is the lattice of Muchnik degrees of nonempty effectively compact sets in Euclidean space. We solve a long-standing open problem by proving that Ew is dense, i.e. satisfies {equation presented}. Our proof ...