Zoi-Heleni Michalopoulou
Chair, Jordan Hu College of Science and Liberal Arts
About Me
Eliza (Z.-H.) Michalopoulou received the Diploma in Electrical Engineering from the National Technical University of Athens, Athens, Greece, in 1988 and the M.S. and Ph.D. degrees in Electrical Engineering from Duke University, Durham, NC, in 1990 and 1993, respectively. Currently, she is a Professor of Mathematical Sciences at the New Jersey Institute of Technology, Newark, NJ; she is also the Chair of the Department. Her research interests include ocean acoustics, machine learning, Bayesian modeling, inverse problems, and array signal processing. Dr. Michalopoulou is a Fellow of the Acoustical Society of America, a Senior Member of IEEE, a Member of SIAM, a member of AWM, and a Member of Pi Mu Epsilon.
Education
Ph.D.; Duke University; Electrical Engineering; 1993
M.S.; Duke University; Electrical Engineering; 1990
Diploma; National Technical University of Athens; Electrical Engineering; 1988
Website
2026 Fall Courses
MATH 792B - PRE DOCTORAL RESEARCH
MATH 790A - DOCT DISSERTATION & RES
Past Courses
MATH 332: INTRO COMPLEX VARIABLES
MATH 337: LINEAR ALGEBRA
MATH 391: NUMERICAL LINEAR ALGEBRA
MATH 401: UNDERGRADUATE RESEARCH SEMINAR
MATH 631: LINEAR ALGEBRA
MATH 790B: DOCTORAL RESEARCH
MATH 792B: PRE DOCTORAL RESEARCH
Research Interests
Ocean acoustics, inverse problems, machine learning, Bayesian inference, array signal processing.
Journal Article
Rami Rashid, Ali Abdi, Zoi-Heleni Michalopoulou. 2025. "Blind weak signal detection via dictionary learning in time-spreading distortion channels using vector sensors." JASA Express Letters, vol. 5, no. 6.
Zoi-Heleni Michalopoulou, Peter Gerstoft, William S. Hodgkiss. 2025. "Inversion with virtual arrays in the Seabed Characterization Experiment 2022." The Journal of the Acoustical Society of America, vol. 157, no. 6, pp. 4526-4537.
Chanin Kuptametee, Zoi-Heleni Michalopoulou, Nattapol Aunsri. 2024. "A review of efficient applications of genetic algorithms to improve particle filtering optimization problems." Measurement, vol. 224.
Chanin Kuptametee, Zoi-Heleni Michalopoulou, Nattapol Aunsri. 2023. "Adaptive genetic algorithm-based particle herding scheme for mitigating particle impoverishment." Measurement (Elsevier).
Zoi-Heleni Michalopoulou, Peter Gerstoft. 2023. "Inversion in an uncertain ocean using Gaussian Processes." Journal of the Acoustical Society of America, pp. 1600-1611.
Chanin Kupatametee, Zoi-Heleni Michalopoulou, Nattapol Aunsri. 2023. "Adaptive Genetic Algorithm-based Particle Herding Scheme for Mitigating Particle Impoverishment." Measurement (Elsevier).
Christina A. Frederick, Zoi-Heleni Michalopoulou. 2022. "Seabed classification and source localization with Gaussian Processes and Machine Learning." JASA Express Letters, vol. 2, no. 8.
Marie Roch, Peter Gerstoft, Bozena Kostek, Zoi-Heleni Michalopoulou. 2021. "How Machine Learning Contributes to Solve Acoustical Problems." Acoustics Today, vol. 17, no. 4, pp. 48-56.
Zoi-Heleni Michalopoulou, Peter Gerstoft, Diego Rios, William Hodgkiss. 2021. "Tracking and inversion using mid-frequency signals in the Seabed Characterization Experiment." IEEE Journal of Oceanic Engineering, pp. 1-12.
Zoi-Heleni Michalopoulou, Peter Gerstoft, Bozena Kostek, Marie Roch. 2021. "Introduction to the Special Issue on Machine Learning in Acoustics." Journal of the Acoustical Society of America, vol. 150, no. 4, pp. 3204-3210.
Zoi-Heleni Michalopoulou, Peter Gerstoft, Diego Caviedes-Nozal. 2021. "Matched field source localization with Gaussian processes." Journal of the Acoustical Society of America Express Letters, pp. 1-7.
Christina A. Frederick, Soledad Villar, Zoi-Heleni Michalopoulou. 2020. "Seabed Classification using Physics-based Modeling and Machine Learning." Journal of the Acoustical Society of America, vol. 148, pp. 859-872.
Zoi-Heleni Michalopoulou, Peter Gerstoft. 2020. "Multipath Broadband Localization, Bathymetry, and Sediment Inversion." IEEE Journal of Oceanic Engineering, vol. 45, pp. 92-102.
Brian Ferguson, Paul Gendron, Zoi-Heleni Michalopoulou, K. Thomas Wong. 2019. "Introduction to the Special Issue on Acoustic Source Localization." Journal of the Acoustical Society of America, vol. 146, pp. 4647-4649.
Zoi-Heleni Michalopoulou, Andrew Pole, Ali Abdi. 2019. "Bayesian coherent and incoherent matched-field localizationand detection in the ocean." Journal of the Acoustical Society of America, vol. 146, pp. 4812-4820.
Jacob Piccolo, George Haramuniz, Zoi-Heleni Michalopoulou. 2019. "Geoacoustic inversion with generalized additive models." Journal of the Acoustical Society of America , vol. 145, pp. EL463-EL468.
Zoi-Heleni Michalopoulou, Nattapol Aunsri. 2018. "Environmental inversion using dispersion tracking in a shallow water environment." Journal of the Acoustical Society of America, vol. 143, pp. EL188-EL193.
Zoi-Heleni Michalopoulou. 2017. "Stochastic sediment property inversion in Shallow Water 06." Journal of the Acoustical Society of America, vol. 142, pp. EL495-EL499.
Zoi-Heleni Michalopoulou, Ali Abdi. 2017. "Detection in an uncertain underwater waveguide." The Journal of the Acoustical Society of America, vol. 142, no. 4, pp. 2553-2553.
Tao Lin, Zoi-Heleni Michalopoulou. 2017. " A Direct Method for the Estimation of Sediment Sound Speed With a Horizontal Array in Shallow Water." IEEE Journal of Oceanic Engineering, vol. 42, no. 1, pp. 208-218.
Bin Wang, Lisa B. Axe, Zoi-Heleni Michalopoulou, Richard E Riman, Mei Chee Tan, Liping Wei. 2016. "Light absorption properties of the New York/New Jersey Harbor Estuary." Hydrobiologia, vol. 766, pp. 173--188.
Zoi-Heleni Michalopoulou, Peter Gerstoft. 2016. "Passive fathometer reflector identification with phase shift modeling." Journal of the Acoustical Society of America, vol. 140, pp. EL125-EL130.
Zoi-Heleni Michalopoulou, Andrew Pole. 2016. "Sediment sound speed inversion with time-frequency analysis and modal arrival time probability density functions." Journal of the Acoustical Society of America, vol. 140, pp. EL131-EL136.
Bin Wang, Lisa Axe, Zoi-Heleni Michalopoulou, Richard Riman, Mei Chee Tan, Liping Wei, , , . 2016. "Light absorption properties of the New York/New Jersey Harbor Estuary." Hydrobiologia, vol. 766, pp. 173-188.
Nattapol Aunsri, Zoi-Heleni Michalopoulou. 2014. "Sequential filtering for dispersion tracking and sediment sound speed inversion." Journal of the Acoustical Society of America, vol. 136, pp. 2665–2674.
Zoi-Heleni Michalopoulou, Tao Lin. 2014. "Sound speed estimation and source localization with linearization and particle filtering." Journal of the Acoustical Society of America, vol. 135, pp. 1115-1126.
Peter Gerstoft, Caglar Yardim, Zoi-Heleni Michalopoulou, William Hodgkiss. 2013. "Geophysical Signal Processing Using Sequential Bayesian Techniques." Geophysics, pp. pp. V87-V100.
Bin Wang, Lisa B. Axe, Zoi-Heleni Michalopoulou, Liping Wei. 2012. "Effects of Cd, Cu, Ni, and Zn on brown tide alga Aureococcus anophagefferens growth and metal accumulation." Environmental science \& technology, vol. 46, no. 1, pp. 517--524.
Zoi-Heleni Michalopoulou, Rashi Jain. 2012. "Particle filtering for arrival time tracking in space and source localization." Journal of the Acoustical Society of America, vol. 32, pp. 3041-3052.
Zoi-Heleni Michalopoulou. 2011. "Model‐Based Ocean Acoustic Signal Processing." Acoustics Today, Acoustical Society of America, vol. 7, pp. 8-15.
Rashi Jain, Zoi-Heleni Michalopoulou. 2011. "A particle filtering approach for spatial arrival time tracking in ocean acoustics." Journal of the Acoustical Society of America, vol. 129, pp. 236-241.
Zoi-Heleni Michalopoulou. 2011. "An overview of sequential Bayesian filtering in ocean acoustics." IEEE Journal of Oceanic Engineering, vol. 36, pp. 73-91.
Zoi-Heleni Michalopoulou, Sumat Mukherjee, S. Hor, K. Su, Zhiwei Liu, Robert B. Barat, Dale E. Gary, John F. Federici. 2010. "RDX Detection with THz Spectroscopy." Journal of Infrared, Millimeter, and Terahertz Waves, vol. 31, pp. 1171-1181.
Ke S, Zhiwei Liu, John F. Federici, Robert B. Barat, Dale E. Gary, Zoi-Heleni Michalopoulou. 2010. "Two-dimensional interferometric and synthetic aperture imaging with a hybrid terahertz/millimeter wave system." Applied Optics, vol. 49, no. 19, pp. E13-E19.
K. Su, Zhiwei Liu, Robert B. Barat, Dale E. Gary, Zoi-Heleni Michalopoulou, John F. Federici. 2010. "Terahertz 2D interferometric and synthetic aperture imaging with an incoherent source." Applied Optics, vol. 49, pp. 7.
Zoi-Heleni Michalopoulou, Sima Bagheri, Lisa B. Axe. 2009. "Bayesian estimation of optical properties of nearshore estuarine waters: A Gibbs sampling approach." IEEE transactions on geoscience and remote sensing, vol. 48, no. 3, pp. 1579--1587.
Zhiwei Liu, Ke Su, Dale E. Gary, John F. Federici, Robert B. Barat, Zoi-Heleni Michalopoulou. 2009. "Video-rate terahertz interferometric and synthetic aperture imaging." Applied optics, vol. 48, no. 19, pp. 3788–3795.
Zoi-Heleni Michalopoulou. 2009. "A Bayesian approach to modal decomposition in ocean acoustics." Journal of the Acoustical Society of America, vol. 126, no. 5, pp. EL147-EL152.
Zoi-Heleni Michalopoulou, Sima Bagheri, Lisa B. Axe, . 2009. "Bayesian Estimation of Optical Properties of Nearshore Estuarine Waters: A Gibbs Sampling Approach ." IEEE Transactions on Geoscience and Remote Sensing, vol. 47, no. 11, pp. 1579-1587.
Liu Zhiwel, Ke Su, Dale E. Gary, John F. Federici, Robert B. Barat, Zoi-Heleni Michalopoulou, . 2009. "Video rate terahertz interferometric and syntehtic aperture imaging." Applied Optics, vol. 48, no. 19, pp. 3788–3795.
Ivan Zorych, Yew Li Hor, Alexander M Sinyukov, Zoi-Heleni Michalopoulou, Robert B. Barat, Dale E. Gary, John F. Federici. 2008. "A Statistical Approach to RDX Detection with THz Reflection Spectra." CAMS Techical Report Series 2008–2009.
Alexander Sinyukov, Ivan Zorych, Zoi-Heleni Michalopoulou, Dale E. Gary, Robert B. Barat, John F. Federici. 2008. "Detection of explosives by Terahertz synthetic aperture imaging—focusing and spectral classification." Comptes Rendus Physique, vol. 9, no. 2, pp. 248–261.
Alexander M Sinyukov, Zhiwei Liu, Yew Li Hor, Ke Su, Robert B. Barat, Dale E. Gary, Zoi-Heleni Michalopoulou, Ivan Zorych, John F. Federici, David Zimdars. 2008. "Rapid-phase modulation of terahertz radiation for high-speed terahertz imaging and spectroscopy." Optics letters, vol. 33, no. 14, pp. 1593–1595.
John F. Federici, Dale E. Gary, Robert B. Barat, Zoi-Heleni Michalopoulou. 2007. "T-rays vs. terrorists." IEEE Spectrum, vol. 44, no. 7, pp. 47–52.
Alexander M Sinyukov, Aparajita Bandyopadhyay, Amartya Sengupta, Robert B. Barat, Dale E. Gary, Zoi-Heleni Michalopoulou, David Zimdars, John F. Federici. 2007. "Terahertz interferometric and synthetic aperture imaging." International Journal of High Speed Electronics and Systems, vol. 17, no. 02, pp. 431–443.
Aparajita Bandyopadhyay, Amartya Sengupta, Alexander M Sinyukov, Robert B. Barat, Dale E. Gary, Zoi-Heleni Michalopoulou, John F. Federici. 2006. "Artificial neural network analysis in interferometric THz imaging for detection of lethal agents." International journal of infrared and millimeter waves, vol. 27, no. 8, pp. 1145–1158.
John F. Federici, Robert B. Barat, Dale E. Gary, Zoi-Heleni Michalopoulou, David Zimdars. 2006. "Standoff sensing of explosives using terahertz radiation." American laboratory, vol. 38, no. 12.
Aparajita Bandyopadhyay, Andrei Stepanov, Brian Schulkin, Michael D Federici, Amartya Sengupta, Dale E. Gary, John F. Federici, Robert B. Barat, Zoi-Heleni Michalopoulou, David Zimdars. 2006. "Terahertz interferometric and synthetic aperture imaging." JOSA A, vol. 23, no. 5, pp. 1168–1178.
Zoi-Heleni Michalopoulou, Sima Bagheri, Lisa B. Axe. 2005. "Matching reflectances for the estimation of inherent optical properties." Center Appl. Math. Stat., New Jersey Inst. Technol., Newark, NJ, Tech. Rep, pp. 0405--15.
Zoi-Heleni Michalopoulou, Urmi Ghosh-Dastidar. 2004. "Tabu for matched-field source localization and geoacoustic inversion." The Journal of the Acoustical Society of America, vol. 115, no. 1, pp. 135-145.
Meeting Abstract
"Learning-based blind passive weak signal detection using a particle motion vector sensor in unknown time-spreading distortion underwater channels"
The Journal of the Acoustical Society of America, April (2nd Quarter/Spring), 2025.
The Journal of the Acoustical Society of America, April (2nd Quarter/Spring), 2025.
"Optimal transport for full waveform seabed property inversion"
The Journal of the Acoustical Society of America, April (2nd Quarter/Spring), 2025.
The Journal of the Acoustical Society of America, April (2nd Quarter/Spring), 2025.
Conference Proceeding
" Direction-of-arrival estimation using Gaussian process interpolation"
Proceedings of ICASSP 2023 (IEEE), 2023.
Proceedings of ICASSP 2023 (IEEE), 2023.
"Theoretical and Experimental Multi-Sensor Signal Detection in Time Spreading Distortion Underwater Channels"
IEEE Proceedings of Oceans 2022, October (4th Quarter/Autumn), 2022.
IEEE Proceedings of Oceans 2022, October (4th Quarter/Autumn), 2022.
"Sampling methods for uncertainty quantification in source localization and geoacoustic inversion in the ocean"
Proceedings of Meetings in Acoustics, June, 2013.
Proceedings of Meetings in Acoustics, June, 2013.
"Time-frequency analysis with Bayesian filtering methods for dispersion tracking"
Proceedings of Meetings in Acoustics, June, 2013.
Proceedings of Meetings in Acoustics, June, 2013.
"Interferometric and Synthetic Aperture Real-Time Terahertz Imaging"
2009.
2009.
"Intracellular And Subcellular Partitioning Of Nickel In Aureococcus Anophagefferens"
2008.
2008.
"Terahertz Synthetic Aperture and Interferometric Imaging"
2007.
2007.
"Interferometric terahertz imaging for detection of lethal agents using artificial neural network analyses"
2006.
2006.
"Terahertz interferometric imaging of a concealed object"
2006.
2006.
"Application of THz Imaging in Security Screening"
2005.
2005.
Conference Abstract
"Optimal sampling strategies for seabed classification and source localization with Gaussian processes and machine learning"
Journal of the Acoustical Society of America, November, 2023.
Journal of the Acoustical Society of America, November, 2023.
"Seabed classification using acoustic signals: A decision tree approach"
Journal of the Acoustical Society of America, November, 2023.
Journal of the Acoustical Society of America, November, 2023.
"Optimal sampling strategies for seabed classification and source localization with Gaussian processes and machine learning"
Journal of the Acoustical Society of America, October (4th Quarter/Autumn), 2023.
Journal of the Acoustical Society of America, October (4th Quarter/Autumn), 2023.
"Seabed classification using acoustic signals: A decision tree approach"
Journal of the Acoustical Society of America, October (4th Quarter/Autumn), 2023.
Journal of the Acoustical Society of America, October (4th Quarter/Autumn), 2023.
"Feature selection for seabed characterization using non-linear regression and decision trees"
Journal of the Acoustical Society of America, April (2nd Quarter/Spring), 2022.
Journal of the Acoustical Society of America, April (2nd Quarter/Spring), 2022.
"Uncertainty reduction in matched field inversion using Gaussian Processes"
Journal of the Acoustical Society of America, April (2nd Quarter/Spring), 2022.
Journal of the Acoustical Society of America, April (2nd Quarter/Spring), 2022.
"Parameter estimation in the SBCEX 17 experiment: geoacoustic inversion and source localization"
Greek Women in STEM, October (4th Quarter/Autumn), 2021.
Greek Women in STEM, October (4th Quarter/Autumn), 2021.
"Source tracking and geoacoustic inversion in the Seabed Characterization Experiment 2017"
Book of Abstracts - UACE, June, 2021.
Book of Abstracts - UACE, June, 2021.
"Source detection and localization in the ocean with a Bayesian approach"
Journal of the Acoustical Society of America, May, 2021.
Journal of the Acoustical Society of America, May, 2021.
"Bayesian inference for water column and sediment inversion in ocean acoustics"
Journal of the Acoustical Society of America, April (2nd Quarter/Spring), 2019.
Journal of the Acoustical Society of America, April (2nd Quarter/Spring), 2019.
"Shallow Water Inversion with Sequential Filtering and Linearization"
SIAM Conference on Computational Science and Engineering Abstracts, February, 2019.
SIAM Conference on Computational Science and Engineering Abstracts, February, 2019.
"Sequential filtering and linearization for inversion in the Seabed Characterization Experiment"
Journal of the Acoustical Society of America, October (4th Quarter/Autumn), 2018.
Journal of the Acoustical Society of America, October (4th Quarter/Autumn), 2018.
Conference Paper
"Theoretical and Experimental Multi-Sensor Signal Detection in Time Spreading Distortion Underwater Channels"
IEEE Proceedings of Oceans 2022, October (4th Quarter/Autumn), 2022.
IEEE Proceedings of Oceans 2022, October (4th Quarter/Autumn), 2022.