نتایج جستجو برای: interval analysis

تعداد نتایج: 2954728  

Journal: :Journal of dental research 2005
M C M Wong K F Lam E C M Lo

The recording of multiple interval-censored failure times is common in dental research. Modeling multilevel data has been a difficult task. This paper aims to use the Bayesian approach to analyze a set of multilevel clustered interval-censored data from a clinical study to investigate the effectiveness of silver diamine fluoride and sodium fluoride varnish in arresting active dentin caries in C...

2005
Warwick Tucker Vincent Moulton

Recently, there has been growing interest in the modelling and simulation of biological systems. Such systems are often modelled in terms of coupled ordinary differential equations that involve parameters whose (often unknown) values correspond to certain fundamental properties of the system. For example, in metabolic modelling, concentrations of metabolites can be described by such equations, ...

2007
Cecilio Angulo Davide Anguita Luis González Abril

Imprecision, incompleteness, prior knowledge or improved learning speed can motivate interval–represented data. Most approaches for SVM learning of interval data use local kernels based on interval distances. We present here a novel approach, suitable for linear SVMs, which allows to deal with interval data without resorting to interval distances. The experimental results confirms the validity ...

2008
Thomas Gawlitza Helmut Seidl

In [?], a practical algorithm for precise interval analysis is provided for which, however, no non-trivial upper complexity bound is known. Here, we present a lower bound by showing that precise interval analysis is at least as hard as computing the sets of winning positions in parity games. Our lower-bound proof relies on an encoding of parity games into systems of particular integer equations...

Journal: :Electr. Notes Theor. Comput. Sci. 2010
Cosimo Laneve Tudor A. Lascu Vania Sordoni

Expressions are multilinear when variable occurrences are linear and products have factors using different variables. We demonstrate that multilinear expressions are either constant or have never a local minimum or a local maximum. Therefore the interval of multilinear expressions may be computed precisely studying their values at the bounds of the variables therein. We then propose a technique...

Journal: :Advanced Robotics 2014
Rémy Guyonneau Sebastien Lagrange Laurent Hardouin Philippe Lucidarme

This paper presents a set membership method (named Interval Analysis Localization) to deal with the global localization problem of mobile robots. By using a LIDAR (LIght Detection And Ranging) range sensor, the odometry and a discrete map of an indoor environment, a robot has to determine its pose (position and orientation) in the map without any knowledge of its initial pose. In a bounded erro...

2009
Vincent Vigneron Francisco Sandoval Alberto Prieto Joan Cabestany

This paper contribution is about guaranteed numerical methods based on interval analysis and the application of these methods to vast classes of statistical problems. ’Guaranteed’ means here the inner and outer approximations of the sets of interest are obtained, which can be made as precise as desired, at the cost of increasing the computational effort. It thus becomes possible to archieve tas...

Journal: :Brazilian journal of medical and biological research = Revista brasileira de pesquisas medicas e biologicas 2004
N R Koehler J P Zouvi L A Acevedo B J Sukienik M Rabin

No reports testing the efficacy of the use of the QT/RR ratio <1/2 for detecting a normal QTc interval were found in the literature. The objective of the present study was to determine if a QT/RR ratio < or =1/2 can be considered to be equal to the normal QTc and to compare the QT and QTc measured and calculated clinically and by a computerized electrocardiograph. Ratios (140 QT/RR) of 28 succe...

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