Long-term behaviour of a clay-bearing sandstone is investigated using elastic waves propagation coupled with strain measurements during moisture cycles. Ad-sorption and desorption are followed in a continuous way during several variations of relative humidity. Moisture adsorption is related to the solvation pressure and the measured elastic weakeni...
Sensitivity is one of the most important parameters to put in the foreground in all sensing applications. Its increase is therefore an ongoing challenge, particularly for surface acoustic wave (SAW) sensors. Herein, finite element method (FEM) simulation using COMSOL Multiphysics software is first used to simulate the physical and electrical proper...
Most of the speech processing applications use triangular filters spaced in mel-scale for feature extraction. In this paper, we propose a new data-driven filter design method which optimizes filter parameters from a given speech data. First, we introduce a frame-selection based approach for developing speech-signal-based frequency warping scale. Th...
International audience
International audience
Breast imaging using electromagnetic (EM) waves is challenging. One aims at the case of a pending breast immersed in a coupling medium and probed by a series of antennas (emitters and transmitters as well) set in this medium, frequencies of operation being around a couple of GHz to achieve both enough penetration and still meaningful resolution. Th...
Breast imaging using electromagnetic (EM) waves is challenging, as illustrated by an abundant literature (notfurther discussed for brevity), yet lacks application in the field beyond prototype stage, e.g., [1]. In the presentcontribution one aims at the case of a pending breast (in opposition with the compressed breast of X-ray mammog-raphy) immers...
International audience
In this work, we present a two-dimensional Finite Element Method (2D-FEM) model implemented on a commercial software, COMSOL Multiphysics, that is used to predict the high temperature behavior of surface acoustic wave sensors based on layered structures. The model was validated by using a comparative study between experimental and simulated results...
International audience
