• 689 Citations

Research output per year

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Personal profile


“I always believe opening my eyes to see different worlds will encourage me to think about things that better our life.”

Research profile

Xi Long is Assistant Professor in the Signal Processing Systems group, where he advises, coordinates and participates in many collaborative projects (with, for example, Philips, Maxima Medical Center, Kempenhaeghe, UMC Utrecht, KU Leuven, Fudan University and others) combining signal processing, data analysis, and healthcare.

Long’s expertise is in signal processing, time series analysis, machine learning, data analytics, deep learning and mathematical modeling. His research interests include engineering for biomedical applications such as unobtrusive sensing, patient monitoring, vital signs monitoring, sleep, physical activity, perinatal and pregnancy monitoring, cardiorespiratory dynamics, psycho-physiological analysis, epilepsy, and brain activity.

In addition, Long has published over 80 scientific articles and reports, generated more than 25 IPs or patent filings and supervised more than 30 PhD or MSc students. He is a peer reviewer of more than 30 prestigious international journals/conferences in his research areas.

Academic background

Xi Long holds a BSc with honor in Electronic Information Engineering from Zhejiang University (China) and obtained his MSc in Electrical Engineering from Eindhoven University of Technology (TU/e) in 2009. He worked at Philips as a researcher from 2008 to 2009 and at Tencent (China) as project manager and UX engineer from 2009 to 2011. He then went on to do his PhD at TU/e and Philips Research, on signal processing and machine learning in unobtrusive sleep monitoring, which he completed cum laude in 2015. Long currently wears several hats: he is a Senior Scientist and Lead FCS Data Analytics Cluster at Philips Research, a Project Coordinator at Maxima Medical Center and UMC Utrecht, and an Assistant Professor at TU/e.

Education/Academic qualification

Doctor, Eindhoven University of Technology


Master, Eindhoven University of Technology


Bachelor, Zhejiang University


External positions

Senior Scientist, Philips Research Laboratories

2016 → …

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Research Output

Wearable sensing and telehealth technology with potential applications in the coronavirus pandemic

Ding, X-R., Clifton, D., Ji, N., Lovell, N. H., Bonato, P., Chen, W., Yu, X., Xue, Z., Xiang, T., Long, X., Xu, K., Jiang, X., Wang, Q., Yin, B., Feng, G. & Zhang, Y-T., May 2020, In : IEEE Reviews in Biomedical Engineering.

Research output: Contribution to journalArticleAcademicpeer-review

  • Sleep stage classification from heart-rate variability using long short-term memory neural networks

    Radha, M., Fonseca, P., Moreau, A., Ross, M., Cerny, A., Anderer, P., Long, X. & Aarts, R., 2 Oct 2019, In : Scientific Reports. 9, 11 p., 14149 .

    Research output: Contribution to journalArticleAcademicpeer-review

    Open Access
  • 1 Citation (Scopus)
    119 Downloads (Pure)

    EEG analysis of seizure patterns using visibility graphs for detection of generalized seizures

    Wang, L., Long, X., Arends, J. B. A. M. & Aarts, R. M., 1 Oct 2017, In : Journal of Neuroscience Methods. 290, p. 85-94 10 p.

    Research output: Contribution to journalArticleAcademicpeer-review

  • 17 Citations (Scopus)
    4 Downloads (Pure)

    Unobtrusive sleep state measurements in preterm infants - A review

    Werth, J. V. S. W., Atallah, L., Andriessen, P., Long, X., Zwartkruis-Pelgrim, E. & Aarts, R. M., 1 Apr 2017, In : Sleep Medicine Reviews. 32, p. 109-122 14 p.

    Research output: Contribution to journalArticleAcademicpeer-review

  • 30 Citations (Scopus)
    4 Downloads (Pure)

    Time delay between cardiac and brain activity during sleep transitions

    Long, X., Arends, J. B. A. M., Aarts, R. M., Haakma, R., Fonseca, P. & Rolink, J., 2015, In : Applied Physics Letters. 106, 14, p. 143702-1/4 4 p., 143702.

    Research output: Contribution to journalArticleAcademicpeer-review

    Open Access
  • 11 Citations (Scopus)
    189 Downloads (Pure)

    Press / Media

    China vows to confront structural issues with economic growth stabilizing

    Xi Long


    2 items of Media coverage

    Press/Media: Expert Comment

    Student theses

    An unobtrusive surrogate blood pressure measurement by a camera and a contact sensor

    Author: Zhang, G., 27 Oct 2016

    Supervisor: Long, X. (Supervisor 1) & Shan, C. (External coach)

    Student thesis: Master

    Baby cry detection based on audio signals using deep neural networks

    Author: Xie, J., 29 Apr 2019

    Supervisor: Long, X. (Supervisor 1)

    Student thesis: Master


    Exploring a novel telescoping visibility graph methodology in physiological time series analysis

    Author: Du, H., 31 Jan 2019

    Supervisor: Long, X. (Supervisor 1)

    Student thesis: Master

    Feature extraction for deep sleep detection

    Author: Yang, J., 31 Aug 2013

    Supervisor: Long, X. (Supervisor 1), Haakma, R. (External coach), Calders, T. (Supervisor 2), Hoang, T. (Supervisor 2) & Serebrenik, A. (Supervisor 2)

    Student thesis: Master