Browsing Τμήμα Μαθηματικών και Στατιστικής / Department of Mathematics and Statistics by Submit Date
Now showing items 120 of 1633

Conference Object
Simulation models for evaluation of terminal operations and traffic flow on adjacent road network
(2009)The goods movement via terminals at ports is a complex operation as it involves use of different modes of transport that includes surface and marine. In this paper, we present three simulation models which can be used to ...

Conference Object
Decentralized Reconfigurable Control for LargeScale Systems with Application to a Segmented Telescope TestBed
(2003)Designing a decentralized reconfigurable control (DRC) system is considered for largescale systems. The objective of the DRC system is to achieve performance requirements under normal and sensor failure situations. The ...

Conference Object
Optimization strategies for resilient freight transport and sustainability
(Institute of Electrical and Electronics Engineers Inc., 2014)A resilient system is one that is able to sustain disruptions by been able to operate close to the optimum or acceptable sub optimum performance by reconfiguring itself to accommodate the disruptions. Resiliency is an ...

Conference Object
RealTime Control of a Segmented Telescope TestBed
(2003)The control of large segmented telescopes is a challenging one due to the complexity and high order of the system. The high order dynamics lead to high order controllers that require more memory and faster computations for ...

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Random spectral measure for non Gaussian moving averages
(2017)We study the distribution of phases and amplitudes for the spectral representation of weighted moving averages of a general noise measure. The simple independent structure, known for the Gaussian case, and involving Rayleigh ...

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Fatigue life prediction for a vessel sailing the North Atlantic route
(2007)A method for calculating the wave load induced fatigue damage accumulated by a vessel sailing along the North Atlantic route (NAr) is presented. This method is based on the PalmgrenMiner additive rule and the rainflow ...

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Overconvergence properties of quintic interpolatory splines
(1988)Let Q be a quintic spline with equispaced knots on [a, b] interpolating a given function y at the knots. The parameters which determine Q are used to construct a piecewise defined polynomial P of degree six. It is shown ...

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End conditions for interpolatory cubic splines with unequally spaced knots
(1980)A class of end conditions is derived for cubic spline interpolation at unequally spaced knots. These conditions are in terms of function values at the knots and lead to 0 (h4) convergence uniformly on the interval of ...

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Identification and reconstruction of a small leak zone in a pipe by a spectral element method
(2006)This paper deals with the identification of a zone permitting fluid to leak out of a drain. Using the analogy with crack identification by boundary measurements, we give uniqueness and stability results and we propose an ...

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Higherorder accurate polyspectral estimation with flattop lagwindows
(2009)Improved performance in higherorder spectral density estimation is achieved using a general class of infiniteorder kernels. These estimates are asymptotically less biased but with the same order of variance as compared ...

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Optimal superconvergent one step nodal cubic spline collocation methods
(2006)We formulate new optimal (fourth) order one step nodal cubic spline collocation methods for the solution of various elliptic boundary value problems in the unit square. These methods are constructed so that the respective ...

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A nonoverlapping domain decomposition method for Legendre spectral collocation problems
(2007)We consider the Dirichlet boundary value problem for Poisson's equation in an Lshaped region or a rectangle with a crosspoint. In both cases, we approximate the Dirichlet problem using Legendre spectral collocation, that ...

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Analysis of traffic flow with mixed manual and semiautomated vehicles
(2003)The introduction of semiautomated vehicles designed to operate with manually driven vehicles is a realistic nearterm objective. The purpose of this paper is to analyze the effects on trafficflow characteristics and ...

Conference Object
Evaluation of mixed semiautomated/manual traffic
(IEEE, 1998)The advance in research and development will make the deployment of automated vehicles a reality in the near future. At the initial stage, semiautomated vehicles with the capability to follow each other automatically in ...

Article
On a monotonic trigonometric sum
(1997)By establishing a cosine analogue of a result of Askey and Steinig on a monotonic sine sum, this paper sharpens and unifies several results associated with Young's inequality for the partial sums of Σk1 cos kθ.

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On a sequence of higherorder nonlinear diffusionconvection equations
(2019)Motivated by the existence of the thin film equations, fourth and sixth order, which are generalizations of the diffusion equation, we consider a sequence of higher order nonlinear diffusionconvection equations. We ...

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Conference Object