Concept

A priori and a posteriori

Related publications (87)

Multiple harmonic sound sources separation in the under-determined case based on both goniometric and beamforming approaches

Hervé Lissek, Xavier Falourd, Patrick Marmaroli

Usually acoustic beamformer or directive microphones are used in order to focus on known potential locations emitting sounds so as to identify and extract their major noise components. However performances of these techniques depend on the number of microp ...

2009

Scale dependence of subgrid-scale model coefficients: An a priori study

Marc Parlange, Charles Vivant Ignacio Meneveau, Nikki Vercauteren

Dynamic subgrid-scale models require an a priori assumption about the variation in the model coefficients with filter scale. The standard dynamic model assumes independence of scale while the scale dependent model assumes power-law dependence. In this pape ...

2008

Combination of Fixed and Mobile Cameras for Automatic Pedestrian Detection

Michel Bierlaire, Murat Kunt, Alexandre Massoud Alahi

Pedestrian detection in the surroundings of a vehicle is highly desirable to avoid dangerous traffic situations. Typical vision-based pedestrian detection algorithms on mobile cameras suffer from the lack of a-priori knowledge on the object to be detected. ...

2008

Assimilation of POLDER aerosol optical thickness into the LMDz-INCA model: Implications for the Arctic aerosol burden

Isabelle Bey, Sylvia Generoso

The large spatial and temporal variability of atmospheric aerosol load makes it a challenge to quantify aerosol effect on climate. This study is one of the first attempts to apply data assimilation for the analysis of global aerosol distribution. Aerosol o ...

2007

Robust Optimization with Recovery: Application to Shortest Paths and Airline Scheduling

Michel Bierlaire, Matteo Salani, Niklaus Eggenberg

In this exploratory paper we consider a robust approach to decisional problems subject to uncertain data in which we have an additional knowledge on the strategy (algorithm) used to react to an unforeseen event or recover from a disruption. This is a typic ...

2007

Robust Optimization with Recovery: Application to Shortest Paths and Airline Scheduling

Michel Bierlaire, Matteo Salani, Niklaus Eggenberg

2007

Hard-x-ray lensless imaging of extended objects

Christian David

We demonstrate a hard-x-ray microscope that does not use a lens and is not limited to a small field of view or an object of finite size. The method does not suffer any of the physical constraints, convergence problems, or defocus ambiguities that often ari ...

2007

Full Motion and Flow Field Recovery from Echo Doppler Data

Michaël Unser, Michael Sühling, Muthuvel Arigovindan

We present a new computational method for reconstructing a vector velocity field from scattered, pulsed-wave ultrasound Doppler data. The main difficulty is that the Doppler measurements are incomplete, for they do only capture the velocity component along ...

IEEE2007

Accuracy Estimation for Laser Point Cloud Including Scanning Geometry

Jan Skaloud

Individual points produced by airborne laser scanning (ALS) may have large variation in their accuracy, a fact that is often omitted in the subsequent derivation of digital terrain models. The accuracy of a single point is governed by three main factors: F ...

2007

Infinite Models for Speaker Clustering

Fabio Valente

In this paper we propose the use of infinite models for the clustering of speakers. Speaker segmentation is obtained trough a Dirichlet Process Mixture (DPM) model which can be interpreted as a flexible model with an infinite a priori number of components. ...

2006

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