Alain LE DUFF
Associate professor, HDR
Experience
Researcher
Laboratoire d'Acoustique de l'Université du Maine - LAUM-UMR 6613

Research activities with the Signal, Image and Instrumentation Group (GSII – www.gsii.fr) and with the LAUM-UMR-CNRS 6613: Instrumentation and signal processing for Non-destructive Testing (NDT), Structural Health Monitoring (SHM), Laser Doppler Anemometry (LDA), Musical instrument’s acoustics.

Associate Professor
ESEO Group

– Teaching activities (master 1 and master 2 courses) at the Department of Electronics and Physics: Signal and image processing, Electronics, Instrumentation and measurement, Acoustics, Matlab/Simulink ;
– Biomedical program leader ;
– Engineering Specialist and Consultant in the Applied Research Laboratory of ESEO R&D with many companies actives in the area of Signal processing, Instrumentation, Metrology, Electronics, LDA, NDT.

2012 – 2013

Invited professor
Université de Sherbrooke

Invited professor at the GAUS (Groupe d’Acoustique de l’Université de Sherbrooke, an academic acoustics and vibration research laboratory in Canada). Research activities, mainly in the field of Structural Health Monitoring (SHM).
– Ultrasonics temperature monitoring for structural health monitoring application ;
– Mechanical characterization of structures by coda wave interferometry ;
– Time-frequency investigation of unsteady flow velocity ;
– Discovery grant applications reviewer for the Natural Sciences and Engineering Research Council of Canada (NSERC).

June 2000 – July 2003

PhD Student
Laboratoire d'Acoustique de l'Université du Maine

Contribution to parametric estimation of signals with sinusoidal frequency modulation and time-varying amplitude: application to laser Doppler anemometry in acoustics.

Keywords : Laser Doppler Anemometry, acoustic particle velocity, Maximum Likelihood Estimator, Extended Kalman Filter, Cramer-Rao Bounds, Instantaneous Frequency, quadrature demodulation, lock-in detection, measurement, instrumentation.

February 1997 – July 1997

Master Student
University of Angers

Master degree in Signal and Image Processing in Biology and Medecine.
Wavelets based compression for brain MRI.

September 1989 – June 1991

Professor
Ecole Polytechnique de Masuku, Gabon

Teaching activities in Electronics, Automatics, Mathematics.

Publications
Articles en revues avec comité de lecture
[6] Seif Eddine Hamdi, Alain Le Duff, Laurent Simon, Guy Plantier, Anthony Sourice, Mathieu Feuilloy, "Acoustic emission pattern recognition approach based on Hilbert-Huang transform for in situ structural health monitoring in polymer-composite materials", In Applied Acoustics, vol. 74, no. 5, pp. 746-757, 2013. [bibtex] [pdf]
[5] Yuxiang Zhang, Vincent Tournat, Odile Abraham, Stéphane Letourneur, Alain Le Duff, Bertrand Lascoup, Ahmed Loukili, Frédéric Grondin, Olivier Durand, "Nonlinear mixing of ultrasonic coda waves with lower frequency swept pump waves for global detection of defects in multiple scattering media", In Accepté à Journal of Applied Physics, 2013. [bibtex]
[4] Guy Plantier, Solenn Moreau, Laurent Simon, Jean-Christophe Valière, Alain Le Duff, Hélène Bailliet, "Nonparametric spectral analysis with missing data via sample-and-hold interpolation and deconvolution", In Digital Signal Processing, vol. 22, no. 8, pp. 994-1004, 2012. [bibtex] [pdf]
[3] Yuxiang Zhang, Odile Abraham, Frédéric Grondin, Ahmed Loukili, Vincent Tournat, Alain Le Duff, Bertrand Lascoup, Olivier Durand, "Study of stress-induced velocity variation in concrete under direct tensile force and monitoring of the damage level by using thermally-compensated Coda Wave Interferometry", In Ultrasonics, vol. 52, pp. 1038 - 1045, 2012. [bibtex] [pdf]
[2] Yuxiang Zhang, Odile Abraham, Vincent Tournat, Alain Le Duff, Bertrand Lascoup, Ahmed Loukili, Frédéric Grondin, Olivier Durand, "Validation of a thermal bias control technique for Coda Wave Interferometry (CWI)", In Ultrasonics, pp. : Disponible en ligne, 2012. [bibtex]
[1] Alain Le Duff, Guy Plantier, Jean-Christophe Valière, Thierry Bosch, "Analog Sensor Design Proposal for Laser Doppler Velocimetry", In IEEE Sensors Journal, vol. 4, no. 2, pp. 257-261, 2004. [bibtex]
Conférences avec actes et comités de lecture
[26] Vincent Tournat, Yuxiang Zhang, Odile Abraham, Alain Le Duff, Bertrand Lascoup, Stphane Letourneur, Vincent Pagneux, "Coda wave interferometry methods for ultrasound characterization of concrete and cracked materials", In Forum of the Far East NDT New Technology and Application, Hefei, Chine, 2012. [bibtex]
[25] Yuxiang Zhang, Odile Abraham, Vincent Tournat, Alain Le Duff, Bertrand Lascoup, A. Loukili, F. Grondin, Olivier Durand, "Validation of a thermal compensation technique for Coda Wave Interferometry (CWI) analysis of acousto-elastic effect", In Acoustics 2012, Nantes - France, 2012. [bibtex]
[24] Seif Eddine Hamdi, Alain Le Duff, Guy Plantier, Anthony Sourice, Laurent Simon, Romain Feron, "Damage Mechanisms Identification of Polymer Based Composite Materials: Time-Frequency Investigation of Acoustic Emission Data Based on Hilbert-Huang Transform.", In Acoustics 2012, Nantes, France, 2012. [bibtex]
[23] Seif Eddine Hamdi, Alain Le Duff, Guy Plantier, Laurent Simon, Rachid El Guerjouma, M. H. Ben Ghozlen, "Hilbert-Huang Transform versus Fourier based analysis for diffused ultrasonic waves structural health monitoring in polymer based composite materials", In Acoustics 2012, Nantes, France, 2012. [bibtex]
[22] Alain Le Duff, Seif Eddine Hamdi, Guy Plantier, Anthony Sourice, Romain Feron, "Cramer-Rao bounds for acoustic emission events localization in a flat plate", In Acoustics 2012, Nantes, France, 2012. [bibtex]
[21] Alain Le Duff, Seif Eddine Hamdi, Guy Plantier, Bertrand Lascoup, "Time Delay Estimation for Acoustic Source Location by Means of Short-Time Cross-Correlation", In IEEE Sensors 2011 conference, Limerick - Ireland, 2011. [bibtex]
[20] Yuxiang Zhang, Odile Abraham, Alain Le Duff, Bertrand Lascoup, Vincent Tournat, Eric Larose, T. Planes, Rachid El Guerjouma, Olivier Durand, "Monitoring the stress level of concrete structures with CODA wave interferometry: experimental illustration of an investigated zone", In International Symposium on Nondestructive Testing of Materials and Structures - NDTMS 2011, Istanbul, Turkey, 2011. [bibtex]
[19] Yuxiang Zhang, Odile Abraham, Eric Larose, Thierry Planes, Alain Le Duff, Bertrand Lascoup, Vincent Tournat, Rachid El Guerjouma, Louis-Marie Cottineau, Olivier Durand, "Following Modifications of the Stress Level of Concrete Structures with CODA Wave Interferometry: Estimation of the Investigated Zone", In 37th Annual Review of Progress in Quantitative Nondestructive Evaluation, San Diego - USA, 2010. [bibtex]
[18] Seif Eddine Hamdi, Alain Le Duff, Guy Plantier, Rachid El Guerjouma, Laurent Simon, Med Hdi Ben Ghozlen, "Suivi de l'effet de la temprature sur la propagation d'ondes acoustiques dans une plaque composite par interfromtrie d'onde de coda ultrasonore", In 10me Congrs Franais d'Acoustique, Lyon - France, 2010. [bibtex]
[17] Eliane Baala, Alain Le Duff, Guy Plantier, Rachid El Guerjouma, "Interfromtrie par onde de coda : effet de la temprature sur la propagation d'ondes acoustiques dans une plaque d'aluminium", In 22me colloque Gretsi sur le Traitement du Signal et des Images, Dijon - France, 2009. [bibtex]
[16] Alain Le Duff, Guy Plantier, Jean-Christophe Valire, Bruno Gazengel, "Cramer-Rao Bounds for sound field measurements by means of Laser Doppler Velocimetry", In 2008 IEEE Sensors Conference, Lecce - Italie, pp. 164-167, 2008. [bibtex]
[15] Bruno Gazengel, Silvio Montresor, Laurent Simon, Alain Le Duff, Guy Plantier, Jean-Christophe Valire, "Mesure de vitesses acoustiques par LDV en prsence de faible coulement : spcificit des traitements de signaux", In Huitime colloque international francophone Contrles et Mesures Optiques pour l'Industrie (CMOI 2007), Arcachon, France, 2007. [bibtex]
[14] Alain Le Duff, Guy Plantier, Jean-Christophe Valire, Bruno Gazengel, "Digital Calibration Procedure for Laser Doppler Velocimetry in Acoustics", In IEEE International Symposium on Intelligent Signal Processing - WISP 2007, Alcala de Henares - Espagne, pp. 1-6, 2007. [bibtex]
[13] Anthony Sourice, Alain Le Duff, Stphane Lebon, James Blondeau, Bruno Gazengel, "Mesures de vitesses acoustiques en temps rel par LDV", In Congrs Francophone de Techniques Laser - CFTL 2006, Toulouse - France, 2006. [bibtex]
[12] Alain Le Duff, Bruno Gazengel, "Insertion d'informations numriques dans un signal : Application la classification de donnes exprimentales en anmomtrie laser Doppler", In 20me colloque GRETSI sur le Traitement du Signal et des Images, Louvain-La-Neuve - Belgique, 2005. [bibtex]
[11] Alain Le Duff, Guy Plantier, Bruno Gazengel, "Real-Time Particle Detection and Velocity Measurement by Means of Laser Doppler Velocimetry", In IEEE Instrumentation and Measurement Technology Conference - IMTC 2005, vol. 3, Ottawa - Canada, pp. 2222-2225, 2005. [bibtex]
[10] Alain Le Duff, Bruno Gazengel, Philippe Rouquier, "Mesure de vitesse particulaire acoustique en prsence d'coulement faible", In 9me Congrs Francophone de Vlocimtrie Laser, Bruxelles - Belgique, 2004. [bibtex]
[9] Alain Le Duff, Guy Plantier, Anthony Sourice, "Particle detection and velocity measurement in laser Doppler velocimetry using Kalman filters", In IEEE International Conference on Acoustics, Speech, and Signal Processing - ICASSP'04, vol. 2, Montréal - Canada, pp. II 365-368, 2004. [bibtex]
[8] Grgory Souchon, Bruno Gazengel, Olivier Richoux, Alain Le Duff, "Characterization of a dipole radiation by Laser Doppler Velocimetry", In 7me congrs Franais d'acoustique, 30. Deutsche Jahrestagung fr Akustik, Strasbourg - France, 2004. [bibtex]
[7] Alain Le Duff, Guy Plantier, Jean-Cristohe Valiere, B. Gazengel, "Mesure de Vitesse Acoustique Particulaire En Champ Libre Par Anémométrie Laser Doppler", In Colloque GRETSI sur le traitement du signal et des images, Paris, 2003. [bibtex]
[6] Alain Le Duff, Guy Plantier, Jean-Christophe Valière, Thierry Bosch, "Velocity Measurement in a Fluid Using LDV: Low-Cost Sensor and Signal Processing Design", In 2002 IEEE Sensors Conference, vol. 2, Orlando - USA, pp. 1347-1350, 2002. [bibtex]
[5] Alain Le Duff, Guy Plantier, Jean-Christophe Valiere, Richard Perdriau, "Acoustic Velocity Measurements in the Air by Means of Laser Doppler Velocimetry: Cramer-Rao Bounds and Maximum Likelihood Estimation", In IEEE International Conference on Acoustics, Speech, and Signal Processing - ICASSP'02, vol. 2, Orlando - USA, pp. II 1325-1328, 2002. [bibtex]
[4] Guy Plantier, Anthony Sourice, Alain Le Duff, Daniel Schang, "Comparaison D'estimateurs de Fréquence À Complexité Algorithmique Réduite", In Colloque GRETSI sur le traitement du signal et des images, Toulouse - France, 2001. [bibtex]
[3] Alain Le Duff, Sylvain Poggi, Guy Plantier, Jean-Christophe Valière, "Real-Time Acoustic Velocity Measurement in the Air by Means of Laser Doppler Velocimetry", In IEEE Instrumentation and Measurement Technology Conference - IMTC 2001, vol. 1, Budapest - Hongrie, pp. 234-238, 2001. [bibtex]
[2] Christine Cavaro-Mnard, Alain Le Duff, Philippe Balzer, Benot Denizot, Olivier Morel, Pierre Jallet, Jean-Jacques Le Jeune, "Quality assessment of compressed cardiac MRI. Effect of lossy compression on computerized physiological parameters", In ICIAP'99 - 10th International Conference on Image Analysis and Processing, Venise - Italy, 1999. [bibtex]
[1] Christine Cavaro-Mnard, Alain Le Duff, Philippe Balzer, Benot Denizot, Olivier Morel, Pierre Jallet, "valuation de mthodes de compression en IRM cardiaque", In 17me colloque Gretsi sur le Traitement du Signal et des Images, Vannes - France, 1999. [bibtex]
Articles en revues professionnelles et rapports internes
[4] Richard Perdriau, Mohamed Ramdani, Ali Alaeldine, Bilel Ben Boubaker, Mathieu Feuilloy, Alain Le Duff, Guy Plantier, Anthony Sourice, Jrme Tissier, "Apprentissage par projets : une application au domaine des tlcommunications", In Journes pdagogiques du CNFM, Saint Malo, 2010. [bibtex]
[3] Alain Le Duff, "Contribution l'estimation paramtrique de signaux variation sinusodale de la frquence instantane et amplitude variable : application l'anmomtrie laser Doppler pour l'acoustique", PhD thesis, Thse de doctorat - Universit du Maine, 2003. [bibtex]
[2] Alain Le Duff, Patrick Plainchault, "La compression d'images : Une ncessit pour l'archivage et la tlmdecine", In L'information Scientifique et Technique - Flashinfo, pp. 67, 1998. [bibtex]
[1] Alain Le Duff, "Compression de squences spatiales d'IRM crbrale par ondelettes", Master's thesis, Mmoire de DEA Signaux et Images en Biologie et Mdecine - Universit d'Angers, Facult de mdecine, 1997. [bibtex]
Conférences nationales et internationales avec actes
[9] Yuxiang Zhang, Odile Abraham, Alain Le Duff, Bertrand Lascoup, Vincent Tournat, Eric Larose, Thierry Planes, Rachid El Guerjouma, Olivier Durand, "Suivi du fluage par interfromtrie de la CODA : illustration exprimentale lors d'un essai de flexion trois points", In Journes \mboxCOFREND, Dunkerque, France, 2011. [bibtex]
[8] Rachid El Guerjouma, Mourad Bentahar, Abderrahim El Mahi, Rachid Berbaoui, Alain Le Duff, Guy Plantier, Daniel Schang, "Contrle de sant des matriaux htrognes par mission acoustique en fluage : estimation de la dure de vie restante", In Journes scientifiques de l'Universit de Nantes, Nantes - France, 2010. [bibtex]
[7] Alain Le Duff, Guy Plantier, Jean-Christophe Valière, "A Signal Processing Approach for Acoustic Velocity Measurement", In Kando Conférence, Budapest - Hongrie, 2002. [bibtex]
[6] Alain Le Duff, Sylvain Poggi, Guy Plantier, Jean-Christophe Valière, "Mise En ØE uvre D'une Boucle À Verrouillage Phase Pour L'estimation de Vitesse Particulaire Acoustique Par Anémomérie Laser À Effet Doppler", In Colloque interdisciplinaire en instrumentation, Paris - France, 2001. [bibtex]
[5] Alain Le Duff, Sylvain Poggi, Guy Plantier, Jean-Christophe Valière, "Mesure En Temps Réel de Vitesse Particulaire Acoustique Par Anémométrie Laser À Effet Doppler", In Colloque interdisciplinaire en instrumentation, Paris - France, 2000. [bibtex]
[4] Christine Cavaro-Mnard, Alain Le Duff, Philippe Balzer, Benot Denizot, Olivier Morel, Pierre Jallet, "valuation de mthodes de compression en IRM cardiaque", In Orasis'99 - Journes Francophones des Jeunes Chercheurs en Analyse d'Images et Perception Visuelle, Aussois - France, 1999. [bibtex]
[3] Alain Le Duff, "Reconstruction d'image par transforme de Fourier bidimensionnelle", In Actes des journes sur la pratique de l'enseignement des mathmatiques, Toulouse - France, 1998. [bibtex]
[2] P. Balzer, C. Cavaro-Mnard, A. Furber, F. Lethimonnier, A. Le Duff, P. Tadi, P. Jallet, J.-J. Le Jeune, "Dtection des contours endocardiques et picardiques du ventricule gauche en IRM cardiaque petit-axe sans initialisation manuelle", In 9me forum des jeunes chercheurs - ITBM, 1998. [bibtex]
[1] Christine Cavaro-Mnard, Alain Le Duff, Philippe Balzer, Benot Denizot, Olivier Morel, Pierre Jallet, "valuation de mthodes de compression en IRM cardiaque", In 9me forum des jeunes chercheurs - ITBM, Brest - France, 1998. [bibtex]