Concept

Statistique d'ordre

Publications associées (41)

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Stochastic modelling of prey depletion processes

Anthony Christopher Davison

The modelling of prey-predator interactions is of major importance for the understanding of population dynamics. Classically, these interactions are modelled using ordinary differential equations, but this has the drawbacks of assuming continuous populatio ...

2009

Hitting time of large subsets of the hypercube

Jiri Cerny, Véronique Gayrard

We study the simple random walk on the n-dimensional hypercube, in particular its hitting times of large (possibly random) sets. We give simple conditions on these sets ensuring that the properly rescaled hitting time is asymptotically exponentially distri ...

2008

Halton Sampling for Image Registration Based on Mutual Information

Michel Bierlaire, Michaël Unser, Philippe Thévenaz

Mutual information is a widely used similarity measure for aligning multimodal medical images. At its core it relies on the computation of a discrete joint histogram, which itself requires image samples for its estimation. In this paper we study the influe ...

Sampling Publishing2008

Network Loss Inference with Second Order Statistics of End-to-End Flows

Patrick Thiran, Xuan Hung Nguyen

We address the problem of calculating link loss rates from end-to-end measurements. Contrary to existing works that use only the average end-to-end loss rates or strict temporal correlations between probes, we exploit second-order moments of end-to-end flo ...

2007

Towards Explaining the Success (Or Failure) of Fusion in Biometric Authentication

Samy Bengio, Norman Hoon Thian Poh

Biometric authentication is a process of verifying an identity claim using a person's behavioral and physiological characteristics. Due to vulnerability of the system to environmental noise and variation caused by the user, fusion of several biometric-enab ...

IDIAP2005

A New High-Resolution Processing Method for the Deconvolution of Optical Coherence Tomography Signals

Michaël Unser, Thierry Blu

We show the feasibility and the potential of a new signal processing algorithm for the high-resolution deconvolution of OCT signals. Our technique relies on the description of the measures in a parametric form, each set of four parameters describing the op ...

IEEE2002

On the necessary density for spectrum-blind nonuniform sampling

Michael Christoph Gastpar

It is known that in the absence of distortion, the minimum average sampling density for a multiband signal is given by its spectral occupancy [1]. Furthermore, there exist nonuniform sampling patterns of the same average sampling density such that reconstr ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2000

On the necessary density for spectrum-blind nonuniform sampling

Michael Christoph Gastpar

2000

Low temperature fabrication of (Y,Gd,Sm)-doped ceria electrolyte

Jan Van Herle

A general procedure based on the oxalate coprecipitation route was developed to produce very sinterable ceria (CeO2) powder doped with Gd2O3, Sm2O3 or Y2O3. The method is simple, reliable and very reproducible. Without any milling step, powder of 20 mol% G ...

1996

Influence and Change-of-Variance Functions of M-Quantiles

n this paper we compute the influence function and change-of-variance function of M-quantiles and deduce those of quantiles and expectiles as a special case. A redescending M-quantile constructed with Tukey's biweight is also studied. ...

1994