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Franck LEVASSORT


Franck Levassort was born near Paris, France. He received the bachelor’s degree in applied physics and the DEA (M.Sc.) degree in physical acoustics from University Paris 7-Denis Diderot, Paris, in 1990 and 1991, respectively, and the Ph.D. degree in ultrasound from the University of Tours, Tours, France, in 1996. From 1997 to 2013, he was an Assistant Professor and since 2014, he has been a Full Professor of Electrical Engineering with the Institute of Technology, University of Tours, Blois, France. Since 2016, he has been a Deputy Director of GREMAN, Tours, a laboratory of more than 100 in the field of materials, microelectronics, acoustics, and nanotechnology. His current research interests include design, modeling, and characterization of piezoelectric composite materials and structures, as well as transducers for imaging applications.


Journal articles30 documents

  • Rémy Ul, Franck Levassort, Michael Lematre, Louis-Pascal Tran-Huu-Hue, Maï Pham-Thi. Internal Electric Field in Co-Doped BaTiO 3 With Co 2+/3+ , Nb 5+ , Li + , and F − : Impact on Functional Properties and Charge Compensation With Niobium and Fluorine Ions. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, Institute of Electrical and Electronics Engineers, 2019, 66 (1), pp.154-162. ⟨hal-02000208⟩
  • Thien Hoang, G. Poulin-Vittrant, Guillaume Ferin, F. Levassort, Claire Bantignies, et al.. Parametric study of a thin piezoelectric cantilever for energy harvesting applications. Advances in Applied Ceramics, Maney Publishing, 2018, 117 (4), pp.231 - 236. 〈10.1080/17436753.2017.1403538〉. 〈hal-01740997〉
  • Jean-René Jacquet, Frédéric Ossant, Franck Levassort, Jean-Marc Gregoire. 3-D-Printed Phantom Fabricated by Photopolymer Jetting Technology for High-Frequency Ultrasound Imaging. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, Institute of Electrical and Electronics Engineers, 2018, 65 (6), pp.1048 - 1055. ⟨10.1109/TUFFC.2018.2823545⟩. ⟨hal-01867387⟩
  • Nesrine Kherraz, Lionel Haumesser, Franck Levassort, P. Benard, B. Morvan. Hybridization bandgap induced by an electrical resonance in piezoelectric metamaterial plates. Journal of Applied Physics, American Institute of Physics, 2018, 123, pp.094901. ⟨10.1063/1.5016496⟩. ⟨hal-01741376⟩
  • Hugo Mercier, Barbara Malič, Hana Uršič, Jitka Hreščak, Franck Levassort, et al.. Electrophoretic deposition and properties of strontium-doped sodium potassium niobate thick films. Journal of the European Ceramic Society, Elsevier, 2017, 37 (16), pp.5305 - 5313. 〈10.1016/j.jeurceramsoc.2017.06.030〉. 〈hal-01867366〉
  • R Rouffaud, F Levassort, A.-C Hladky-Hennion. Unified model for the electromechanical coupling factor of orthorhombic piezoelectric rectangular bar with arbitrary aspect ratio. AIP Advances, American Institute of Physics- AIP Publishing LLC, 2017, 7, pp.25302 - 25302. ⟨10.1063/1.4976298⟩. ⟨hal-01705106⟩
  • Tomasz Zawada, Louise Moller Bierregaard, Erling Ringgaard, Ruichao Xu, Michele Guizzetti, et al.. Characterization of Kerfless Linear Arrays Based on PZT Thick Film. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, Institute of Electrical and Electronics Engineers, 2017, 64 (9), pp.1409 - 1416. ⟨10.1109/TUFFC.2017.2709253⟩. ⟨hal-01740978⟩
  • R. Rouffaud, A.-C. Hladky-Hennion, F. Levassort. A combined genetic algorithm and finite element method for the determination of a practical elasto-electric set for 1-3 piezocomposite phases. Ultrasonics, Elsevier, 2017, 77, pp.214 - 223. ⟨10.1016/j.ultras.2017.02.015⟩. ⟨hal-01705103⟩
  • Tina Bakaric, Tadej Rojac, André-Pierre Abellard, Barbara Malic, Franck Levassort, et al.. Effect of Pore Size and Porosity on Piezoelectric and Acoustic Properties of Pb(Zr0.53Ti0.47)O3 Ceramics. Advances in Applied Ceramics, Maney Publishing, 2016, 115 (2), pp.66-71. 〈10.1179/1743676115Y.0000000040〉. 〈hal-01814873〉
  • Gustavo Mata Osoro, Damien Bregiroux, Mai Pham Thi, Franck Levassort. Structural and piezoelectric properties evolution induced by cobalt doping and cobalt/niobium co-doping in BaTiO3. Materials Letters, Elsevier, 2016, 166 (1), pp. 259-262. ⟨10.1016/j.matlet.2015.12.086⟩. ⟨hal-01252037⟩
  • Nesrine Kherraz, Lionel Haumesser, Franck Levassort, P. Benard, B. Morvan. Controlling Bragg gaps induced by electric boundary conditions in phononic piezoelectric plates. Applied Physics Letters, American Institute of Physics, 2016, 108, pp.093503. ⟨10.1063/1.4943138⟩. ⟨hal-01741359⟩
  • R. Rouffaud, Franck Levassort, Maï Pham Thi, Claire Bantignies, Marc Lethiecq, et al.. Super-Cell Piezoelectric Composite With 1–3 Connectivity. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, Institute of Electrical and Electronics Engineers, 2016, 63 (12), pp.2215 - 2223. ⟨10.1109/TUFFC.2016.2606109⟩. ⟨hal-01741012⟩
  • Charles Croënne, Marie-Fraise Ponge, Bertrand Dubus, Christian Granger, Lionel Haumesser, et al.. Tunable phononic crystals based on piezoelectric composites with 1-3 connectivity. Journal of the Acoustical Society of America, Acoustical Society of America, 2016, 139, pp.3296 - 3302. 〈10.1121/1.4950725〉. 〈hal-01741391〉
  • André-Pierre Abellard, Danjela Kuscer, Marc Lethiecq, B. Malic, Franck Levassort. Processing and Electromechanical Properties of Lead Zirconate Titanate Thick Films by Electrophoretic Deposition. Advances in Applied Ceramics, Maney Publishing, 2015, 114 (4), pp.198-204. 〈10.1179/1743676115Y.0000000008〉. 〈hal-01814876〉
  • Rémi Rouffaud, Christian Granger, Anne-Christine Hladky-Hennion, Mai Pham Thi, Franck Levassort. Tonpilz Underwater Acoustic Transducer Integrating Lead-free Piezoelectric Material. Physics Procedia, Elsevier, 2015, 70, pp.997 - 1001. ⟨10.1016/j.phpro.2015.08.208⟩. ⟨hal-01705141⟩
  • D. Wang, Erwan Filoux, Franck Levassort, Marc Lethiecq, S.A. Rocks, et al.. Fabrication and Characterization of Annular-Array, High-Frequency, Ultrasonic Transducers Based on PZT Thick Film. Sensors and Actuators A: Physical , Elsevier, 2014, 216, pp.207-213. ⟨10.1016/j.sna.2014.05.026⟩. ⟨hal-01814879⟩
  • André-Pierre Abellard, Danjela Kuscer, Marc Lethiecq, Jean-Marc Grégoire, Barbara Malic, et al.. Lead Zirconate Titanate Multi-Element Structure by Electrophoretic Deposition. Journal of Microelectronics, Electronic Components and Material, 2014, 44 (1), pp.34-41. 〈hal-01814880〉
  • André-Pierre Abellard, Danjela Kuscer, Jean-Marc Grégoire, Marc Lethiecq, B. Malic, et al.. Lead Zirconate Titanate-Based Thick Films for High-Frequency Focused Ultrasound Transducers Prepared by Electrophoretic Deposition. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, Institute of Electrical and Electronics Engineers, 2014, 61 (3), pp.547-556. ⟨10.1109/TUFFC.2014.2938⟩. ⟨hal-01814878⟩
  • R Rouffaud, P. Marchet, A.-C Hladky-Hennion, C. Bantignies, M. Pham-Thi, et al.. Complete electroelastic set for the (YXt)-45 cut of a KNbO3 single crystal. Journal of Applied Physics, American Institute of Physics, 2014, 116 (19), ⟨10.1063/1.4902168⟩. ⟨hal-01705113⟩
  • R Rouffaud, Pascal Marchet, A.-C Hladky-Hennion, C Bantignies, M Pham-Thi, et al.. Complete electroelastic set for the (YXt)-45 ° cut of a KNbO 3 single crystal. Journal of Applied Physics, American Institute of Physics, 2014, Journal of applied physics, 116 (19), pp.194106. ⟨10.1063/1.4902168⟩. ⟨hal-01097552⟩
  • R Rouffaud, Pascal Marchet, A.-C Hladky-Hennion, C Bantignies, M Pham-Thi, et al.. Complete electroelastic set for the (YXt)-45° cut of a KNbO 3 single crystal. Journal of Applied Physics, American Institute of Physics, 2014, pp.194106. ⟨10.1063/1.4902168⟩. ⟨hal-01116502⟩
  • Erwan Filoux, Rasmus Lou-Moeller, Samuel Callé, Marc Lethiecq, Franck Levassort. Optimised Properties of High Frequency Transducers Based on Curved Piezoelectric Thick Films Obtained by Pad Printing Process. Advances in Applied Ceramics, Maney Publishing, 2013, 112 (2), pp.75-78. 〈10.1179/1743676112Y.0000000031〉. 〈hal-01814881〉
  • Hana Ursic, Franck Levassort, Janez Holc, Marc Lethiecq, Marija Kosec. 0.65Pb(Mg 1/3 Nb 2/3 )O 3 –0.35PbTiO 3 Thick Films for High-Frequency Piezoelectric Transducer Applications. Japanese Journal of Applied Physics, 2013, 52 (5R), pp.055502. 〈hal-01814884〉
  • Axel Guiroy, Anthony Novell, Erling Ringgaard, Rasmus Lou-Moeller, Jean-Marc Grégoire, et al.. Dual-Frequency Transducer for Nonlinear Contrast Agent Imaging. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, Institute of Electrical and Electronics Engineers, 2013, 60 (12), pp.2634-2644. ⟨10.1109/TUFFC.2013.2862⟩. ⟨hal-01814887⟩
  • Danjela Kuscer, Franck Levassort, Marc Lethiecq, André-Pierre Abellard, Marija Kosec. Lead-Zirconate-Titanate Thick Films by Electrophoretic Deposition for High-Frequency Ultrasound Transducers. Journal of the American Ceramic Society, 2012, 95 (3), pp.892-900. 〈10.1111/j.1551-2916.2011.04911.x〉. 〈hal-01814889〉
  • Marc Lethiecq, Rasmus Lou-Moeller, Jeffrey A. Ketterling, Franck Levassort, Louis Pascal Tran-Huu-Hue, et al.. Non-Planar Pad-Printed Thick-Film Focused High-Frequency Ultrasonic Transducers for Imaging and Therapeutic Applications. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, Institute of Electrical and Electronics Engineers, 2012, 59 (9), pp.1976-1982. ⟨10.1109/TUFFC.2012.2416⟩. ⟨hal-01814888⟩
  • G. Leveque, Pascal Marchet, Franck Levassort, Louis-Pascal Tran-Huu-Hue, Jean-René Duclere. Lead free (Li,Na,K)(Nb,Ta,Sb)O3 piezoelectric ceramics: Influence of sintering atmosphere and ZrO2 doping on densification, microstructure and piezoelectric properties. Journal of the European Ceramic Society, Elsevier, 2011, 31, pp.577-588. ⟨10.1016/j.jeurceramsoc.2010.10.031⟩. ⟨hal-00584942⟩
  • F. Levassort, A.C. Hladky-Hennion, H. Le Khanh, L.P. Tran-Huu-Hue, M. Lethiecq, et al.. 0-3 and 1-3 piezo-composites based on single crystal PMN-PT for transducer applications. Advances in Applied Ceramics, Maney Publishing, 2010, 109, pp.162-168. 〈10.1179/174367509X12472364601075〉. 〈hal-00549550〉
  • M. Pham Thi, A.C. Hladky-Hennion, H. Le Khanh, L.P. Tran-Huu-Hue, M. Lethiecq, et al.. Large area 0-3 and 1-3 piezoelectric composites based on single crystal PMN-PT for transducer applications. Physics Procedia, Elsevier, 2010, 3, pp.897-904. ⟨10.1016/j.phpro.2010.01.115⟩. ⟨hal-00549549⟩
  • G. Feuillard, E. Le Clezio, Franck Levassort, Pascal Tran Huu Hue, T. Delaunay, et al.. New tools for electromechanical characterisation of piezoceramics. Journal of Electroceramics, Springer Verlag, 2007, 19 (4), pp.419 - 426. 〈10.1007/s10832-007-9177-4〉. 〈hal-01804614〉

Conference papers28 documents

  • Claire Bantignies, Thien Hoang, Hugo Mercier, Franck Levassort, Danjela Kuscer, et al.. Lead-Free Sodium Potassium Niobate Based Piezoelectric Thick Film Bimorph Structure for Energy Harvesting. 2018 IEEE International Ultrasonics Symposium (IUS), Oct 2018, Kobe, France. IEEE, pp.1-4. 〈hal-02048609〉
  • Antoine Bale, Rémi Rouffaud, Franck Levassort, Anne-Christine Hladky-Hennion, Pascal Marchet. Theoretical Electroelastic Moduli of Porous Textured Piezoceramics. 2018 IEEE International Ultrasonics Symposium (IUS), Oct 2018, Kobe, France. IEEE, pp.1-4. 〈hal-02048575〉
  • Angel Prato, F. Levassort, C. Bantignies, M. Pham Thi, Pascal Marchet. La texturation des céramiques : application aux matériaux piézoélectriques sans plomb. 2ème Ecole de Printemps : Matériaux, Procédés et Applications, Apr 2017, Nador, Maroc. 〈hal-01901039〉
  • Rémy Ul, Rémi Rouffaud, Louis-Pascal Tran-Huu-Hue, Franck Levassort, Maï Pham-Thi, et al.. Complete Electroelastic Set of Co doped Barium Titanate for Transducer Applications. 2017 IEEE International Ultrasonics Symposium (IUS), Sep 2017, Washington, DC, United States. IEEE, 2017 IEEE International Ultrasonics Symposium (IUS), 〈10.1109/ULTSYM.2017.8091772〉. 〈hal-01705122〉
  • Angel Prato, F. Levassort, C. Bantignies, M. Pham Thi, Pascal Marchet. Texturation of lead-free BaTiO3 based piezoelectric ceramics. PIEZO 2017, Feb 2017, Cercedilla, Spain. 〈hal-01899464〉
  • Marc Lethiecq, Danjela Kuscer, Julien Bustillo, André-Pierre Abellard, Tina Bakaric, et al.. Porous lead zirconate titanate ceramics with optimized acoustic properties for high-frequency ultrasonic transducer applications. Acoustical Society of America (ASA) 174th Meeting, 2017, New Orleans, LA, USA, United States. 142 (4), pp.2576, 2017, 〈10.1121/1.5014416〉. 〈hal-01741053〉
  • Danjela Kuscer, Tina Bakaric, André-Pierre Abellard, Julien Bustillo, Marc Lethiecq, et al.. High-frequency acoustic characterization of porous lead zirconate titanate for backing applications. 2017 IEEE International Ultrasonics Symposium (IUS) , Sep 2017, Washington, United States. 2017. 〈hal-01634093〉
  • Angel Prato, F. Levassort, C. Bantignies, P. Pham Thi, Pascal Marchet. Texturation of lead-free BaTiO3 based piezoelectric ceramics. Electroceramics XV, Jun 2016, Limoges, France. 〈hal-01852006〉
  • T. Hoang, G. Férin, B. Rosinski, C. Bantignies, H. Le Khanh, et al.. Characterization of a thin piezoelectric material before integration into a cantilever-based mechanical energy harvester. 2016 IEEE International Ultrasonics Symposium (IUS), Sep 2016, Tours, France. IEEE, 〈10.1109/ULTSYM.2016.7728652〉. 〈hal-01741000〉
  • Rémi Rouffaud, Franck Levassort, Marc Lethiecq, Mai Pham Thi, Anne-Christine Hladky-Hennion, et al.. 1-3 Piezocomposites Based on Super-Cell Structuring for Transducer Applications. 2015 IEEE International Ultrasonics Symposium (IUS), Oct 2015, Taipei, Taiwan. IEEE, Ultrasonics Symposium (IUS), 2015 IEEE International. 〈10.1109/ULTSYM.2015.0368〉. 〈hal-01705138〉
  • A Ngueteu-Kamlo, F Levassort, M Pham Thi, Pascal Marchet. Texturation of lead-free BaTiO3-based piezoelectric ceramics. Electroceramics XIV, Jun 2014, Bucarest, Romania. 2014. 〈hal-01116537〉
  • M Pham Thi, Pascal Marchet, F Levassort, C Blantignie. Matériaux piézoélectriques sans plomb pour transducteurs acoustiques. matériaux 2014, Nov 2014, Montpellier, France. 〈hal-01116549〉
  • Mathieu Domenjoud, Julien Bustillo, Marc Lethiecq, Franck Levassort. Domain wall evolutions laws of piezoceramic materials under mechanical loading. IEEE International Symposium on the Applications of Ferroelectrics and Piezoresponse Force Microscopy, May 2014, Penn state, United States. 〈10.1109/ISAF.2014.6922967〉. 〈hal-01235815〉
  • A Ngueteu-Kamlo, F. Levassort, M. Pham Thi, Pascal Marchet. Texturation of lead-free BaTiO3 based piezoelectric ceramics. 2013 Joint UFFC, EFTF and PFM Symposium, Jul 2013, Prague, Czech Republic. 〈hal-00950322〉
  • C. Bantignies, E. Filoux, P. Mauchamp, R. Dufait, M. Pham Thi, et al.. Lead-free high-frequency linear-array transducer (30 MHz) for in vivo skin imaging. 2013 IEEE International Ultrasonics Symposium (IUS), Jul 2013, Prague, Czech Republic. IEEE, Ultrasonics Symposium (IUS), 2013 IEEE International. 〈10.1109/ULTSYM.2013.0202〉. 〈hal-01705147〉
  • A Ngueteu-Kamlo, F. Levassort, M. Pham-Thi, Pascal Marchet. Texturation of lead-free BaTiO3-based piezoelectric ceramics. PIEZO 2013 Electroceramics for end user, Mar 2013, Les Arcs 1800, France. 〈hal-00949486〉
  • R. Rouffaud, F. Levassort, M. Pham-Thi, E. Leveugle, A.C. Hladky-Hennion. Electro-elastic moduli and frequency dependence of KN single crystal. Joint 21th International Symposium on Applications of Ferroelectrics, ISAF 2012, 11st European Conference on the Applications of Polar Dielectrics, ECAPD 2012, 4th International Symposium on Piezoresponse Force Microscopy and Nanoscale Phenomena in P, 2012, Aveiro, Portugal. pp.1-4, 2012, 〈10.1109/ISAF.2012.6297785〉. 〈hal-00801040〉
  • Rémi Rouffaud, Anne-Christine Hladky-Hennion, Maï Pham-Thi, Claire Bantignies, Franck Levassort. Influence of 1-3 piezocomposite fabrications on lateral modes. 2012 IEEE International Ultrasonics Symposium, Oct 2012, Dresden, Germany. IEEE, Ultrasonics Symposium (IUS), 2012 IEEE International. 〈10.1109/ULTSYM.2012.0556〉. 〈hal-01705150〉
  • R Rouffaud, F. Levassort, M. Pham-Thi, E. Leveugle, A.-C. Hladky-Hennion. Electro-elastic moduli and frequency dependence of KN single crystal. 2012 Joint 21st IEEE ISAF / 11th IEEE ECAPD / IEEE PFM (ISAF/ECAPD/PFM), Jul 2012, Aveiro, Portugal. IEEE, Applications of Ferroelectrics held jointly with 2012 European Conference on the Applications of Polar Dielectrics and 2012 International Symp Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials (ISAF/ECAPD/PFM), 2012 Intl Symp. 〈10.1109/ISAF.2012.6297785〉. 〈hal-01705153〉
  • Franck Levassort, Konstantin Astafiev, Rasmus Lou-Moeller, Jean-Marc Grégoire, Lise Nielsen, et al.. Ultrasonic transducers based on curved lead-free piezoelectric thick films for high resolution medical imaging. Acoustics 2012, Apr 2012, Nantes, France. ⟨hal-00810928⟩
  • André-Pierre Abellard, Franck Levassort, Danjela Kuscer, Janez Holc, Jean-Marc Grégoire, et al.. Electrophoretic deposition (EPD) process for lead zirconate titanate (PZT) thick films fabrication and high frequency medical imaging. Acoustics 2012, Apr 2012, Nantes, France. ⟨hal-00810992⟩
  • R. Rouffaud, A.C. Hladky-Hennion, M. Pham Thi, E. Leveugle, F. Levassort. Modeling of pseudo-periodic 1-3 piezo-composites for ultrasonic transducers. Société Française d'Acoustique. Acoustics 2012, Apr 2012, Nantes, France. 2012. 〈hal-00797221〉
  • André-Pierre Abellard, Danjela Kuscer, Janez Holc, Franck Levassort, Oleksandr Noshchenko, et al.. Fabrication and modeling of piezoelectric transducers for High-Frequency medical imaging. Ljubljana: MIDEM - Society for Microelectronics, Electronic Components and Materials. 47th International Conference on Microelectronics, Devices and Materials and the Workshop, Sep 2011, Ajdovščina, Slovenia. pp.33-37, 2011. 〈hal-00817373〉
  • Franck Levassort, Anne-Christine Hladky-Hennion, Louis-Pascal Tran-Huu-Hue, Marc Lethiecq, D. Ekeom, et al.. Fabrication et caractérisation de composites piézoélectriques de connectivité 1-3 à base de monocristaux pour la transduction ultrasonore. Société Française d'Acoustique - SFA. 10ème Congrès Français d'Acoustique, Apr 2010, Lyon, France. 2010. 〈hal-00551172〉
  • Erwan Filoux, Samuel Callé, Rasmus Lou-Moeller, Marc Lethiecq, Franck Levassort. Caractérisation et modélisation de transducteurs haute fréquence utilisant les technologies de films épais piézoélectriques. Société Française d'Acoustique - SFA. 10ème Congrès Français d'Acoustique, Apr 2010, Lyon, France. 2010. 〈hal-00549612〉
  • F. Levassort, A.C. Hladky-Hennion, L.P. Tran-Huu-Hue, M. Lethiecq, D. Ekeom, et al.. Fabrication et caractérisation de composites piézoélectriques de connectivité 1-3 à base de monocristaux pour la transduction ultrasonore. 10ème Congrés Français d'Acoustique, CFA 10, 2010, France. _, pp.1-5, 2010. 〈hal-00572213〉
  • M. Pham Thi, A.C. Hladky-Hennion, F. Levassort. Composites 0-3 et 1-3 à base de monocristaux piézoélectrique-polymère pour transducteurs acoustiques. Matériaux 2010, 2010, Nantes, France. 〈hal-00573561〉
  • M. Pham Thi, H. Le Khanh, D. Ekeom, A.C. Hladky-Hennion, L.P. Tran-Huu-Hue, et al.. Fabrication and characterization of large area 1-3 piezo-composites based on PMN-PT single crystals for transducer applications. IEEE International Ultrasonics Symposium, 2009 IEEE IUS, 2009, Italy. _, pp.1745-1748, 2009, 〈10.1109/ULTSYM.2009.5441989〉. 〈hal-00474073〉

Poster communications1 document

  • R. Rouffaud, Franck Levassort, M. Pham, Pascal Marchet, C. Bantignies, et al.. Optimized self-consistent full database of piezoelectric material: application to KNbO3 single crystal. Electroceramics XV, Jun 2016, Limoges, France. 〈hal-01841380〉

Directions of work or proceedings1 document

  • Jean-René Jacquet, Franck Levassort, Frédéric Ossant, Jean-Marc Gregoire. 3D printed phantom for high frequency ultrasound imaging. Ultrasonics Symposium (IUS), 2015 IEEE International, Oct 2015, Taipei, Taiwan. 2015, 〈10.1109/ULTSYM.2015.0487〉. 〈hal-01385513〉