Şerban Mihalache

PhD Student, Teaching Assistant, Researcher, MSEE, Faculty of Electronics, Telecommunications and Information Technology,
University “Politehnica” of Bucharest

Email: serban.mihalache@upb.ro
Office: B030, Leu Campus – Blvd. Iuliu Maniu No. 1-3, Bucharest 061071, Romania
Tel: +40 21 402 46 88, +40 772 038 547


Last updated: November 2022

  • Scientific Activity
    • National research projects
    • Member in organizing committees
    • Reviewer for international journals
    • Reviewer for international conferences
    • Prizes
    • Affiliation to scientific community
  • List of publications
    • Journal articles
    • Conference papers
    • PhD Thesis
    • MSEE Thesis
    • BSEE Thesis

Research and Teaching Interests

  • Audio Signal Analysis, Synthesis and Processing;
  • Machine Learning and Deep Learning;
  • Speech Emotion Recognition;
  • Speech Stress Detection;
  • Deceptive Speech Detection;
  • Analog Integrated Circuits and Analog System Design.

Degrees and Professional Experience

Degrees

  • Master of Science in Electronic Engineering (MSEE); specialization in Microsystems (July 2017); University “Politehnica” of Bucharest, Romania, Faculty of Electronics, Telecommunications and Information Technology.
  • Bachelor of Science in Electronic Engineering (BSEE); major in Electronics Engineering, Telecommunications and Information Technologies, specialization in Microelectronics (July 2015); University “Politehnica” of Bucharest, Romania, Faculty of Electronics, Telecommunications and Information Technology.
  • Baccalaureate Degree (June 2011); “Sfântul Sava” National College (Saint Sava National College), Bucharest, Romania.

Professional experience

  • Researcher (January 2022 – present) at the Research Institute for Artificial Intelligence “Mihai Drăgănescu”, Romanian Academy, Bucharest, Romania. Research on Speech Emotion Remanence.
  • Teaching Assistant (October 2017 – present) at the Faculty of Electronics, Telecommunications and Information Technology, University “Politehnica” of Bucharest, Romania. Lab assistant for Digital Signal Processing, Advanced Digital Signal Processing, Microprocessor Architectures and Microcontrollers. Tutorial assistant for Analog Integrated Circuits.
  • Research Assistant (May 2017 – present) at the University “Politehnica” of Bucharest, Romania. Research on Speech Signal Analysis and Processing Techniques in Forensic Speech.
  • Analog Design Engineer (October 2015 – October 2017) at Microchip Technology Inc., Bucharest, Romania. Analog circuit and system design and simulation for High Voltage Power Management Integrated Circuits (DC-DC Buck Converters – Non-synchronous), within the Analog, Power and Interface Division (APID). Layout development and verification. Integrated circuit testing and validation.
  • Analog Design Intern (February 2013 – October 2015) at Microchip Technology Inc., Bucharest, Romania. Analog circuit and system design and simulation for Power Management Integrated Circuits (DC-DC Buck Converters – Non-synchronous), within the Analog, Power and Interface Division (APID). Layout development and verification. Integrated circuit testing and validation.

Academic Activity

Teaching

All my teaching activity takes place at the Faculty of Electronics, Telecommunications and Information Technology, University “Politehnica” of Bucharest.

Undergraduate curricula

  • Analog Integrated Circuits, 3rd year course, lectures and tutorials (2022); English class.
  • Advanced Techniques in Digital Signal Processing, 4th year laboratory (2016 – present); supervisor: Prof. Dragoș Burileanu.
  • Digital Signal Processing, 3rd year laboratory (2016 – present); supervisor: Prof. Dragoș Burileanu.
  • Analog Integrated Circuits, 3rd year tutorials (2016 – present) and laboratory (2016 – 2017); supervisors: Prof. Cosmin Popa and Prof. Claudius Dan.
  • Microcontrollers, 3rd year laboratory (2017 – 2021); supervisor: Prof. Corneliu Burileanu.
  • Microprocessor Architectures, 2nd year laboratory (2017 – 2021); supervisor: Prof. Corneliu Burileanu.

Graduate student supervision

2022-2023

  • Mirela-Iuliana Gheorghe, “Machine learning techniques for detecting depression from speech”, Faculty of Electronics, Telecommunications and Information Technology, University “Politehnica” of Bucharest, Romania. Academic co-supervisor: Prof. Dragoș Burileanu.
  • Radu Hajdeu, “System for automatic plant health identification from video”, Faculty of Electronics, Telecommunications and Information Technology, University “Politehnica” of Bucharest, Romania. Academic co-supervisor: Prof. Dragoș Burileanu.

2019-2020

  • Ioan-Alexandru Ivanov, “Separating speech segments from audio recordings using neural network models”, Faculty of Electronics, Telecommunications and Information Technology, University “Politehnica” of Bucharest, Romania. Academic co-supervisor: Prof. Dragoș Burileanu.

Undergraduate student supervision

2022-2023

  • Alexandru Busuioc, “Speech enhancement techniques for aerospace communication”, Faculty of Electronics, Telecommunications and Information Technology, University “Politehnica” of Bucharest, Romania. Academic co-supervisor: Prof. Dragoș Burileanu.
  • Adrian-Cătălin Iamandache, “Applied study on layout design for analog and digital integrated circuits using multiobjective optimization”, Faculty of Electronics, Telecommunications and Information Technology, University “Politehnica” of Bucharest, Romania. Academic co-supervisor: Prof. Dragoș Burileanu.
  • Cristian-Teodor Neamțu, “Speech liveness detection”, Faculty of Electronics, Telecommunications and Information Technology, University “Politehnica” of Bucharest, Romania. Academic co-supervisor: Prof. Dragoș Burileanu.
  • Andrei-Cristian Negrea, “High PSRR LDO voltage regulator for low noise applications”, Faculty of Electronics, Telecommunications and Information Technology, University “Politehnica” of Bucharest, Romania. Academic co-supervisor: Prof. Dragoș Burileanu.
  • Andrei-Cătălin Luca, “Wi-Fi network security methods”, Faculty of Electronics, Telecommunications and Information Technology, University “Politehnica” of Bucharest, Romania. Academic co-supervisor: Prof. Dragoș Burileanu.

2021-2022

  • Andreea Ionescu, “Machine learning techniques for deceptive speech detection”, Faculty of Electronics, Telecommunications and Information Technology, University “Politehnica” of Bucharest, Romania. Academic co-supervisor: Prof. Dragoș Burileanu.
  • Anca-Ștefania Joița, “Fully differential amplifier with increased common-mode rejection ratio”, Faculty of Electronics, Telecommunications and Information Technology, University “Politehnica” of Bucharest, Romania. Academic co-supervisor: Prof. Dragoș Burileanu.
  • Priscila-Dana Marin, “Analysis and design of a high power charge pump circuit”, Faculty of Electronics, Telecommunications and Information Technology, University “Politehnica” of Bucharest, Romania. Academic co-supervisor: Prof. Dragoș Burileanu.
  • Irina-Georgia Mutică, “Automatic gender and age recognition from speech using neural network models”, Faculty of Electronics, Telecommunications and Information Technology, University “Politehnica” of Bucharest, Romania. Academic co-supervisor: Prof. Dragoș Burileanu.

2019-2020

  • Ștefania Dicu, “Automatic speaker gender identification”, Faculty of Electronics, Telecommunications and Information Technology, University “Politehnica” of Bucharest, Romania. Academic co-supervisor: Prof. Dragoș Burileanu.
  • Alexandru-Cristian Gorunescu, “Speech emotion recognition using machine learning techniques”, Faculty of Electronics, Telecommunications and Information Technology, University “Politehnica” of Bucharest, Romania. Academic co-supervisor: Prof. Dragoș Burileanu.
  • Narcisa-Ionela Guran, “Neural network models for stress detection from speech”, Faculty of Electronics, Telecommunications and Information Technology, University “Politehnica” of Bucharest, Romania. Academic co-supervisor: Prof. Dragoș Burileanu.

2018-2019

  • Georgiana-Elena Botezatu, “Multi-effect digital pedal for electric guitar”, Faculty of Electronics, Telecommunications and Information Technology, University “Politehnica” of Bucharest, Romania. Academic co-supervisor: Prof. Dragoș Burileanu.
  • Tudor-Nicolae Datcu, “Intelligent system for multimodal data acquisition and household system control”, Faculty of Electronics, Telecommunications and Information Technology, University “Politehnica” of Bucharest, Romania. Academic co-supervisor: Prof. Dragoș Burileanu.
  • Alexandru-Nicușor Firuți, “Software for daily physical activity recognition using movement sensors”, Faculty of Electronics, Telecommunications and Information Technology, University “Politehnica” of Bucharest, Romania. Academic co-supervisor: Prof. Dragoș Burileanu.

2017-2018

  • Andrei Iulian Gîrd, “Real-time automatic identification and reconstruction techniques of musical content from audio signals”, Faculty of Electronics, Telecommunications and Information Technology, University “Politehnica” of Bucharest, Romania. Academic co-supervisor: Prof. Dragoș Burileanu.
  • Cosmin-Valeriu Retegan, “Software for the automatic transcription of musical content from audio recordings”, Faculty of Electronics, Telecommunications and Information Technology, University “Politehnica” of Bucharest, Romania. Academic co-supervisor: Prof. Dragoș Burileanu.

2016-2017

  • Andreea Maria Florea, “3D Scanner with Infrared Optical Sensing”, Faculty of Electronics, Telecommunications and Information Technology, University “Politehnica” of Bucharest, Romania. Primary academic supervisor: Prof. Dragoș Burileanu.
  • Claudia Andreea Nedelcu, “Digital processing techniques for automatic music track separation”, Faculty of Electronics, Telecommunications and Information Technology, University “Politehnica” of Bucharest, Romania. Primary academic supervisor: Prof. Dragoș Burileanu.

Scientific Activity

National research projects

  • 2017 – 2020: Research Assistant, project PN-III-P2-2.1-SOL-2016-02-0002, agreement 2SOL/2017, funded by the Romanian Government through UEFISCDI: Intelligent Systems for Video and Audio Analysis – Technologies and Innovative Video Systems for Person Re-identification and Analysis of Dissimulated Behavior (SPIA-VA), 2017-2020, [LINK].

Member in organizing committees

  • SpeD 2021 – the 11th International Conference on Speech Technology and Human-Computer Dialogue, Bucharest, Romania, October 13-15, 2021.
  • SpeD 2019 – the 10th International Conference on Speech Technology and Human-Computer Dialogue, Timişoara, Romania, October 10-12, 2019.

Reviewer for international journals

  • Peer reviewer for the UPB Scientific Bulletin, Series C – Electrical Engineering and Computer Science, Politehnica Press, Bucharest, Romania, ISSN: 2286-3540 (since 2019).

Reviewer for international conferences

  • SpeD 2021 – the 11th International Conference on Speech Technology and Human-Computer Dialogue, Bucharest, Romania, October 13-15, 2021.
  • SpeD 2019 – the 10th International Conference on Speech Technology and Human-Computer Dialogue, Timişoara, Romania, October 10-12, 2019.

Prizes

2016

  • Third Prize, in the IEEE Region 8 Student Paper Contest, Limassol, Cyprus, paper: “Current-mode Capacitance Multiplier with Reduced Parasitic Elements”, co-author: Florin-Silviu Dumitru.

2015

  • Best Student Paper Award, at the IEEE Romania 25th Anniversary Colloquium, paper: “Current-mode Capacitance Multiplier with Reduced Parasitic Elements”, co-author: Florin-Silviu Dumitru.
  • First Prize, in the “Tudor Tănăsescu” National Electronics Competition (Analog Integrated Circuits section), Bucharest, Romania.
  • Best Student Paper Award, at the 38th International Semiconductor Conference (CAS), Sinaia, Romania, paper: “Automated Cooling Control System through Peltier Effect and High Efficiency Control using a DC-DC Buck Converter”, co-authors: Irina Flamaropol, Florin-Silviu Dumitru, Lidia Dobrescu, Dragoș Dobrescu.

2014

  • First Prize, in the National stage of the Robochallenge National Robotics Competition, Bucharest, Romania, Academic section, project: COX (Line Follower Robot), team members: Florin-Silviu Dumitru, Ioana Antoche, Andrei Poenaru.

Affiliation to scientific community

  • Member of the Speech and Dialogue Research Laboratory (SpeeD), 2015 – present.
  • Member of the Institute of Electrical and Electronic Engineers (IEEE), 2013 – present.

List of publications

Journal articles (5)

2022

  • Ș. Mihalache, D. Burileanu, E. Franți, M. Dascălu, C.-A. Brătan, “Lasting emotions – An investigation of short- and long-term affective content remanence in speech,” in Romanian Journal of Information Science and Technology, vol. 25, iss. 1, pp. 20-35, Jan.-Mar. 2022. ISSN: 1453-8245. ISI WOS: 000775912300002 (Q4, IF: 0.852).
  • Ș. Mihalache, D. Burileanu, “Using Voice Activity Detection and Deep Neural Networks with Hybrid Speech Feature Extraction for Deceptive Speech Detection,” in Sensors, vol. 22, iss. 3, 1228, 6 Feb. 2022. ISSN: 1424-8220. DOI: 10.3390/s22031228. ISI WOS: 000759983300001 (Q1, IF: 3.576).

2021

  • Ș. Mihalache, D. Burileanu, “Dimensional Models for Continuous-to-Discrete Affect Mapping in Speech Emotion Recognition,” in University Politehnica of Bucharest Scientific Bulletin, Series C – Electrical Engineering and Computer Science, Bucharest, Romania, vol. 83, iss. 4, pp. 137-148, Oct.-Dec. 2021. ISSN: 2286-3540. ISI WOS: 000741473700013.

2018

  • G. Pop, D. Burileanu, Ș. Mihalache, “An Evaluative ENF-Based Framework for Forensic Authentication of Digital Audio Recordings,” in the Proceedings of the Romanian Academy Series A – Mathematics, Physics, Technical Sciences, Information Science, Publishing House of the Romanian Academy, Bucharest, Romania, vol. 19, iss. 4, pp. 605-612, Oct.-Dec. 2018. ISSN: 1454-9069. ISI WOS: 000454140900012 (Q2, IF: 1.752).

2017

  • Ș. Mihalache, F.-S. Dumitru, A. Florescu, S. V. Pașca, “Dithering Options for Integrated Relaxation Oscillators,” in Revue Roumaine des Sciences Techniques – Serie Electrotechnique et Energetique (RRST), Bucharest, Romania, vol. 62, iss. 1, pp. 61-67, Jan.-Mar. 2017. ISSN 0035-4066. ISI WOS: 000399629400011 (Q3, IF: 1.114).

Conference papers (10)

2021

  • Ș. Mihalache, D. Burileanu, C. Burileanu, “Detecting Psychological Stress from Speech using Deep Neural Networks and Ensemble Classifiers,” in the Proceedings of the 11th International Conference on Speech Technology and Human-Computer Dialogue (SpeD), Bucharest, Romania, pp. 74-79, 13-15 Oct. 2021. ISBN: 978-1-6654-2786-9. DOI: 10.1109/SpeD53181.2021.9587430. ISI WOS: 000786794700014.
  • Ș. Mihalache, I.-A. Ivanov, D. Burileanu, “Deep Neural Networks for Voice Activity Detection,” in the Proceedings of the 44th International Conference on Telecommunications and Signal Processing (TSP), Virtual conference, pp. 191-194, 26-28 Jul. 2021. ISBN: 978-1-6654-2933-7. DOI: 10.1109/TSP52935.2021.9522670. ISI WOS: 000701604600041.

2019

  • Ș. Mihalache, G. Pop, D. Burileanu, “Introducing the RODeCAR Database for Deceptive Speech Detection,” in the Proceedings of the 10th International Conference on Speech Technology and Human-Computer Dialogue (SpeD), Timișoara, Romania, pp. 1-6, 10-12 Oct. 2019. ISBN: 978-1-7281-0983-1. DOI: 10.1109/SPED.2019.8906542. ISI WOS: 000571718700006.
  • Ș. Mihalache, D. Burileanu, G. Pop, C. Burileanu, “Modulation-based Speech Emotion Recognition with Reconstruction Error Feature Expansion,” in the Proceedings of the 10th International Conference on Speech Technology and Human-Computer Dialogue (SpeD), Timișoara, Romania, pp. 1-6, 10-12 Oct. 2019. ISBN: 978-1-7281-0983-1. DOI: 10.1109/SPED.2019.8906537. ISI WOS: 000571718700004.
  • G. Pop, Ș. Mihalache, D. Burileanu, “Forensic Recognition of Narrowband AMR Signals,” in the Proceedings of the 10th International Conference on Speech Technology and Human-Computer Dialogue (SpeD), Romania, pp. 1-6, 10-12 Oct. 2019. ISBN: 978-1-7281-0983-1. DOI: 10.1109/SPED.2019.8906279. ISI WOS: 000571718700002.

2018

  • G. Pop, Ș. Mihalache, D. Burileanu, “Forensic Speaker Identification Using Speech Quality Data,” in the Proceedings of the 12th International Conference on Communications (COMM), Bucharest, Romania, pp. 509-512, 14-16 Jun. 2018. ISBN: 978-1-5386-2350-3. DOI: 10.1109/ICComm.2018.8484766. ISI WOS: 000449526000096.

2017

  • F.-S. Dumitru, Ș. Mihalache, M. Enăchescu, “OPAMP’s finite gain and slew rate impact on a 16-bit ΣΔ ADC performance: A case study,” in the Proceedings of the 40th International Semiconductor Conference (CAS), Sinaia, Romania, pp. 161-164, Oct. 11-14 2017. ISBN 978-1-5090-3985-2. DOI: 10.1109/SMICND.2017.8101187. ISI WOS: 000425844500034.

2016

  • Ș. Mihalache, F.-S. Dumitru, “Current-Mode Capacitance Multiplier with Reduced Parasitic Elements,” in the Proceedings of the 18th Mediterranean Electrotechnical Conference (MELECON), Limassol, Cyprus, pp. 1-6, 18-20 Apr. 2016. ISBN 978-1-5090-0058-6. DOI: 10.1109/MELCON.2016.7495302. ISI WOS: 000390719500001.

2015

  • F.-S. Dumitru, Ș. Mihalache, Gh. Brezeanu, “A CMOS Resistorless Bandgap Reference with Minimized Current Consumption,” in the Proceedings of the 38th International Semiconductor Conference (CAS), Sinaia, Romania, pp. 289-292, 12-14 Oct. 2015. ISBN 978-1-4799-8863-1. DOI: 10.1109/SMICND.2015.7355235. ISI WOS: 000380566400058.
  • Ș. Mihalache, I. Flamaropol, F.-S. Dumitru, L. Dobrescu, D. Dobrescu, “Automated Cooling Control System through Peltier Effect and High Efficiency Control using a DC-DC Buck Converter,” in the Proceedings of the 38th International Semiconductor Conference (CAS), Sinaia, Romania, pp. 281-284, 12-14 Oct. 2015. ISBN 978-1-4799-8863-1. DOI: 10.1109/SMICND.2015.7355233. ISI WOS: 000380566400056.

PhD thesis (WIP)

Ș. Mihalache, “Speech Signal Analysis and Processing Techniques in Forensic Speech”, PhD Thesis, University “Politehnica” of Bucharest, September 2022 (expected date) (academic supervisor: Prof. Corneliu Burileanu; guidance committee: Prof. Dragoș Burileanu, Prof. Horia Cucu, Prof. Ruxandra Țapu).

MSEE thesis

Ș. Mihalache, “Tunnel Diode Based Bi-tangent Oscillator”, MSEE Thesis, University “Politehnica” of Bucharest, July 2017 (academic supervisors: Prof. Gheorghe Brezeanu, Dr. Marius Budăeș).

BSEE thesis

Ș. Mihalache, “Current-mode Capacitance Multiplier with Reduced Parasitic Elements”, BSEE Thesis, University “Politehnica” of Bucharest, July 2015 (academic supervisors: Prof. Gheorghe Brezeanu, Dr. Marius Budăeș).