Πλοήγηση ανά Θέμα "ALGORITHM"
Αποτελέσματα 1-20 από 27
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Agreement assessment of NOAA/AVHRR NDVI with landsat TM NDVI for mapping burned forested areas
(2002)Meteorological satellites are appropriate for operational applications related to early warning, monitoring and damage assessment of forest fires. Environmental or resources satellites, with better spatial resolution than ... -
CDNs Content Outsourcing via Generalized Communities
(2009)Content distribution networks (CDNs) balance costs and quality in services related to content delivery. Devising an efficient content outsourcing policy is crucial since, based on such policies, CDN providers can provide ... -
Development and evaluation of QSPECT open-source software for the iterative reconstruction of SPECT images
(2010)Objective In this study open-source software (QSPECT) suitable for the iterative reconstruction of single-photon emission computed tomography (SPECT) data is presented. QSPECT implements maximum likelihood expectation ... -
Enhancing principal direction divisive clustering
(2010)While data clustering has a long history and a large amount of research has been devoted to the development of numerous clustering techniques, significant challenges still remain. One of the most important of them is ... -
Evolving cognitive and social experience in Particle Swarm Optimization through Differential Evolution: A hybrid approach
(2012)In recent years, the Particle Swarm Optimization has rapidly gained increasing popularity and many variants and hybrid approaches have been proposed to improve it. In this paper, motivated by the behavior and the spatial ... -
A Fourier-based implicit evolution scheme for active surfaces, for object segmentation in volumetric images
(2013)Active contours (AC) and active surfaces (AS) have been used extensively for segmentation and measurement in two- and three-dimensional images. The small time steps used in discretizing the evolution equation of AC/AS with ... -
An implicit evolution scheme for active contours and surfaces based on IIR filtering
(2014)In this work, we present an approach for implementing an implicit scheme for the numerical solution of the partial differential equation of the evolution of an active contour/surface. The proposed scheme is applicable to ... -
Layered multicast rate control based on Lagrangian relaxation and dynamic programming
(2006)In this paper, we address the rate control problem for layered multicast traffic, with the objective of solving a generalized throughput/fairness objective. Our approach is based on a combination of Lagrangian relaxation ... -
The matrix analogue of the scalar AOR iterative method
(2015)The Accelerated Overrelaxation (AOR) and the Generalized AOR (GAOR) iterative methods for the solution of linear systems of algebraic equations (Ax = b, A is an element of C-nxn, det(A) not equal 0, b is an element of C-n) ... -
Mixed integer least squares optimization for flight and maintenance planning of mission aircraft
(2012)We address the problem of generating a joint flight and maintenance plan for a unit of mission aircraft. The objective is to establish a balanced allocation of the flight load and the maintenance capacity to the individual ... -
Mixed integer parametric bilevel programming for optimal strategic bidding of energy producers in day-ahead electricity markets with indivisibilities
(2013)We address the problem of finding the optimal bidding strategy of an energy producer that participates in a single-period day-ahead electricity market, assuming full knowledge of the market's parameters. The problem is ... -
A modification of flattening filter free linac for IMRT
(2011)Purpose: This study investigates the benefits of a modified flattening filter free (FFF) linac over the standard (STD) linac equipped with the flattening filter. Energy and angular spread of the electron beam of the FFF ... -
Multi-Criteria Analysis Framework for Potential Flood Prone Areas Mapping
(2015)A fundamental component of the European natural disaster management policy is the detection of potential flood-prone areas, which is directly connected to the European Directive (2007/60). This study presents a framework ... -
A multigrain Delaunay mesh generation method for multicore SMT-based architectures
(2009)Given the proliferation of layered, multicore- and SMT-based architectures, it is imperative to deploy and evaluate important, multi-level, scientific computing codes, such as meshing algorithms, on these systems. We focus ... -
Performance evaluation of an automatic transfer line with WIP scrapping during long failures
(2007)We develop a model of a failure-prone, bufferless, paced, automatic transfer line in which material flows through a number of workstations in series, receiving continuous processing along each workstation. When a workstation ... -
PREDICTION IN WIRELESS NETWORKS BY MARKOV CHAINS
(2009)Discrete sequence modeling and prediction is an important goal and a challenge for pervasive computing. Mobile clients' data request forecasting and location tracking in wireless cellular networks are characteristic ... -
Rationally Designed Less Toxic SPD-304 Analogs and Preliminary Evaluation of Their TNF Inhibitory Effects
(2014)SPD-304 was discovered as a promising tumor necrosis factor alpha (TNF) antagonist that promotes dissociation of TNF trimers and therefore blocks the interaction of TNF and its receptor. However, SPD-304 contains a potentially ... -
Risk analysis of industrial structures under extreme transient loads
(2004)A modular analysis package is assembled for assessing risk in typical industrial structural units such as steel storage tanks, due to extreme transient loads that are produced either as a result of chemical explosions in ... -
Scheduling with pairwise XORing of packets under statistical overhearing information and feedback
(2012)We study the problem of scheduling packets from several flows traversing a given node which can mix packets belonging to different flows. Practical wireless network coding solutions depend on knowledge of overhearing events ... -
Single vehicle routing problems with a predefined customer sequence, compartmentalized load and stochastic demands
(2012)We consider the problem of finding the optimal routing of a single vehicle that delivers K different products to N customers according to a particular customer order. The demands of the customers for each product are assumed ...