Dr Chang Wei Tan

Research Fellow @ Monash University

Data Scientist

I'm interested in

About

I am a Research Fellow at the Department of Data Science and AI, Monash University, specializing in Time Series Analysis and Machine Learning applications. I successfully completed my PhD at the Faculty of Information Technology, Monash University, under the guidance of Professor Geoff Webb, Dr François Petitjean and Dr Paul Reichl. My doctoral thesis, titled “Time series classification at scale”, focused on advancing Scalable Time Series Classification techniques. Specifically, I developed efficient algorithms capable of handling large time series datasets, resulting in faster and more effective classification processes.


During my doctoral studies, I received recognition for my contributions in the field. I was honored to receive a best paper award for my work on "Efficient search of the best warping window for Dynamic Time Warping". This paper introduced a novel algorithm for learning the parameters of Dynamic Time Warping (DTW), a widely used measure for comparing time series. Additionally, my dedication and research excellence were acknowledged through the prestigious Mollie Holman medal awarded by Monash University, recognizing my doctoral thesis as the best in the Faculty of Information Technology.


My expertise extends beyond academia, as I actively apply time series analysis to real-world challenges. I have collaborated with the Institute of Railway Technology (IRT) at Monash University to enhance railway track maintenance through the application of advanced time series analysis techniques.


Presently, I am continuing my research endeavors in Scalable Time Series Classification while expanding my focus to Time Series Extrinsic Regression (TSER). TSER involves predicting continuous scalar values based on time series data. Unlike classification tasks, where the target is discrete, and forecasting tasks, which may not rely on recent or seasonal values, TSER presents unique challenges. To address these challenges, I am devoted to developing innovative methodologies that leverage machine learning techniques. Furthermore, I am exploring the potential of utilizing EEG devices for various applications, such as diagnosing epilepsy and detecting driver's distractions. These areas of research hold substantial promise for improving the lives of epilepsy patients and enhancing road safety.


In addition to my core research interests, I am actively involved in a Defense Advanced Research Projects Agency's (DAPRA) project called Computational Cultural Understanding (CCU), where I lead the effort in predicting changes in conversations. This project aims to deepen our understanding of cultural dynamics and improve communication strategies.


Furthermore, I am engaged in providing data science services to Stemly, where I contribute my expertise in developing autonomous supply chain demand forecasting solutions. Through this collaboration, I strive to optimize supply chain operations and enhance forecasting accuracy.


In summary, my multifaceted research background encompasses Scalable Time Series Classification, Time Series Extrinsic Regression, EEG-based applications, cultural understanding, and supply chain analytics. By addressing fundamental challenges in these domains, I aim to make meaningful contributions to academia, industry, and society as a whole.

Research Interest

  • Time Series Analysis
  • Machine Learning
  • Data Mining
  • EEG Research
  • Railway Engineering
  • Wireless Sensor Networks

Research

Working papers

  1. C.W. Tan, F. Petitjean, E. Keogh, and G.I. Webb, "Time series classification for varying length series"
  2. M. Herrmann, C.W. Tan, M. Salehi, and G.I. Webb, "Proximity Forest 2.0: A new effective and scalable similarity-based classifier for time series"
  3. A. Fawaz, A. Dempster, C.W. Tan, M. Herrmann, L. Miller, D.F. Schmidt, S. Berretti, J. Weber, M. Devanne, G. Forestier, and G.I. Webb, "An Approach to Multiple Comparison Benchmark Evaluations that is Stable Under Manipulation of the Comparate Set"

Publications

  1. N. Foumani, L. Miller, C.W. Tan, G.I. Webb, G. Forestier, and M. Salehi, "Deep Learning for Time Series Classification and Extrinsic Regression: A Current Survey" in ACM Computing Surveys, 2024
  2. M. Janmohamed, D. Nhu, L. Shakathreh, O. Gonen, L. Kuhlman, A. Gilligan, C.W Tan, P. Perucca, T.J. O’Brien, and P. Kwan "Comparison of automated spike detection software in detecting epileptiform abnormalities on scalp-EEG of genetic generalized epilepsy patients" in Journal of Clinical Neurophysiology, 2023
  3. C. Nguyen, C.W. Tan, E. Daly and V. Pauwel "Applications of convolutional neural networks and remote sensing data to predict flood extents" in The 25th International Congress on Modelling and Simulation (MODSIM2023), 2023
  4. N. Foumani, C.W. Tan, G.I. Webb, and M. Salehi, "Improving Position Encoding of Transformers for Multivariate Time Series Classification" in Data Mining and Knowledge Discovery, 2023
  5. M. Herrmann, C.W. Tan, and G.I. Webb, "Parameterizing the cost function of Dynamic Time Warping with application to time series classification" in Data Mining and Knowledge Discovery, 2023 doi
  6. C.W. Tan, M. Herrmann, and G.I. Webb, "Ultra-fast meta-parameter optimization for time series similarity measures with application to nearest neighbour classification" in Knowledge and Information Systems, 2023 doi
  7. D. Nhu, M. Janmohamed, L. Shakhatreh, O. Gonen, P. Perucca, A. Gilligan, P. Kwan, T.J. O'Brien, C.W. Tan, and L. Kuhlmann, "Automated Interictal Epileptiform Discharge Detection from Scalp EEG Using Scalable Time-series Classification Approaches" in International Journal of Neural System, 2023 doi
  8. D. Nhu, M. Janmohamed, A. Antonic-Baker, P. Perucca, T.J. O'Brien, A. Gilligan, P. Kwan, C.W. Tan, and L. Kuhlmann, "Deep learning for automated epileptiform discharge detection from scalp EEG: a systematic review" in Journal of Neural Engineering, 2022 doi
  9. C.W. Tan, A. Dempster, C. Bergmeir, and G.I. Webb, "MultiRocket: Multiple pooling operators and transformations for fast and effective time series classification" in Data Mining and Knowledge Discovery, 2022 doi
  10. M. Janmohamed, D. Nhu, L. Kuhlmann, A. Gilligan, C.W. Tan, P. Perucca, T.J. O'Brien, and P. Kwan, "Moving the field forward: detection of epileptiform abnormalities on scalp electroencephalography using deep learning—clinical application perspectives" in Brains Communications, 2022 doi
  11. C.W. Tan, M. Herrmann, and G.I. Webb, "Ultra fast warping window optimization for Dynamic Time Warping" in IEEE International Conference on Data Mining (ICDM 2021), IEEE, 2021
  12. N. Foumani, C.W. Tan, and M. Salehi, "Disjoint-CNN for Multivariate Time Series Classification" in IEEE International Conference on Data Mining Workshops (ICDMW 2021), IEEE, 2021 doi
  13. D. Nhu, M. Janmohamed, P. Perucca, A. Gilligan, P. Kwan, T.J. O'Brien, C.W. Tan, and L. Kuhlmann, "Graph Convolutional Network For Generalized Epileptiform Abnormality Detection On EEG" in IEEE Signal Processing in Medicine and Biology Symposium (SPMB 2021), IEEE, 2021
  14. C.W. Tan, C. Bergmeir, F. Petitjean, and G.I. Webb, "Time Series Extrinsic Regression: Predicting numeric values from time series data" in Data Mining and Knowledge Discovery, 2021 doi
  15. D. Nhu, M. Janmohamed, L. Shakhatreh, O. Gonen, P. Kwan, A. Gilligan, C.W. Tan, and L. Kuhlmann, "Automated Inter-ictal Epileptiform Discharge Detection From Routine EEG" in Studies in Health Technology and Informatics, 2021 doi
  16. C.W. Tan, F. Petitjean, and G.I. Webb, "FastEE: Fast Ensembles of Elastic Distances for time series classification" in Data Mining and Knowledge Discovery 2020 doi
  17. C.W. Tan, F. Petitjean, and G.I. Webb, "Elastic bands across the path: A new framework and method to lower bound DTW" in 2019 SIAM International Conference on Data Mining (SDM19), SIAM, 2019 doi
  18. C.W. Tan, M. Herrmann, G. Forestier, G.I. Webb, and F. Petitjean, "Efficient search of the best warping window for Dynamic Time Warping" in 2018 SIAM International Conference on Data Mining (SDM18), SIAM, 2018 Best Research Paper Award doi
  19. C.W. Tan, G.I. Webb, F. Petitjean and P. Reichl, "Machine learning approaches for tamping effectiveness prediction" in 11th International Heavy Haul Association Conference (IHHA), IHHA, 2017
  20. C.W. Tan, G.I. Webb, F. Petitjean and P. Reichl, "Tamping Effectiveness Prediction Using Supervised Machine Learning Techniques" in First International Conference on Rail Transportation (ICRT), Southwest Jiaotong University, 2017 doi
  21. F. Wu, C.W. Tan, M. Sarvi, C. Rudiger and M. Yuce, "Design and Implementation of a Low-Power Wireless Sensor Network Platform Based on XBee" in 2017 IEEE 85th Vehicular Technology Conference (VTC2017), IEEE Vehicular Technology Society, 2017 doi
  22. C.W. Tan, G.I. Webb, and F. Petitjean, "Indexing and classifying gigabytes of time series under time warping" in 2017 SIAM International Conference on Data Mining (SDM17), SIAM, 2017 doi

Program committees / Refereeing

Journals

Conferences and Workshops

Achievements

Awards

  1. 2019 - Mollie Holman Medal awarded by Monash University for the best doctoral thesis in the Faculty of Information Technology
  2. 2018 – Best Research Paper Award awarded by the Society for Industrial and Applied Math (SIAM) International Conference on Data Mining 2018 (SDM18).
  3. 2018 – SIAM Student Travel Award awarded by the Society for Industrial and Applied Math (SIAM) International Conference on Data Mining 2018 (SDM18) to selected students traveling to a SIAM conferences.
  4. 2017 – SIAM Student Travel Award awarded by the Society for Industrial and Applied Math (SIAM) International Conference on Data Mining 2018 (SDM17) to selected students traveling to a SIAM conferences.
  5. 2015 – Faculty of Engineering Dean’s Honour List 2014 awarded by Monash University to students in recognition of attaining an average of 80% or above in 2014 academic year.
  6. 2014 – Third Prize in Final Year Project Poster Competition, Academic Award awarded by Monash University ECSE Department to the student with the best final year project poster voted by academic staffs at the ECSE poster night. During this event, ECSE final year students showcase their project to academic staffs, and industry partners.
  7. 2014 – Jack Wilson Prize Award awarded by Wilson Transformer to level 3 Electrical Engineering student who shows the greatest proficiency and initiative in Electrical Power Engineering.
  8. 2013 – Faculty of Engineering Dean’s Honour List 2012 awarded by Monash University to students in recognition of attaining an average of 80% or above in 2012 academic year
  9. 2012 – Faculty of Engineering Dean’s Honour List 2011 awarded by Monash University to students in recognition of attaining an average of 80% or above in 2014 academic year
  10. 2012 – Golden Key International Honor Society Award. This is a life-long award for the top 15% based on academic achievement.

Scholarships

  1. 2018 – Monash University Postgraduate Publications Award (PPA). The PPA provides support for high-achieving students who, having submitted their thesis, wish to write up some of their research for publication while they await the result of their examination.
  2. 2015 – Australian Postgraduate Award (APA) Scholarship. APA scholarships are awarded to students of exceptional research potential undertaking a HDR in Australia. It is currently known as Research Training Program (RTP) scheme.
  3. 2015 – Monash University Faculty of Engineering Summer Research Scholarship 2014/2015. Summer research program for high achieving students to assist lecturers in researches during the summer.
  4. 2014 – Monash University Faculty of Engineering Summer Research Scholarship 2013/2014.Summer research program for high achieving students to assist lecturers in researches during the summer.

Experiences

Work

  1. 2019 Aug – Current – Research Fellow – Department of Data Science and AI, Monash University
  2. 2018 Apr – 2018 Dec – Teaching Associate (ENG1002) – Department of Electrical and Computer Systems Engineering (ECSE), Monash University
  3. 2018 Jan – 2018 Apr – Data Research Associate (Intern) – DataSpark Singapore
  4. 2015 Jun – 2017 Nov – Teaching Associate (ENG1002, ECE4058) – Department of Electrical and Computer Systems Engineering (ECSE), Monash University
  5. 2014 Jun – 2015 Dec – Research Assistant – Biomedical Integrated Circuits and Sensors Laboratory (BICS), Monash University
  6. 2012 Dec – 2013 Feb – Electrical Engineer (Intern) – Sarawak Energy
  7. 2012 Jan – 2012 Feb – Electrical Consultant (Intern) – Perunding ElecMec

Volunteering

  1. 2016 Jan – 2017 Apr – Assistant Secretary, Monash IEEE Student Branch
  2. 2016 Jun – Year 8 ChallENGe – Faculty of Engineering, Monash University
  3. 2012 Jun – MUISS Winter Swoop – Monash University International Student Society (MUISS)

Competitions

  1. 2018 May – 3 Minute Thesis (3MT) – Faculty of Information Technology, Monash University
  2. 2017 May – 3 Minute Thesis (3MT) – Faculty of Information Technology, Monash University

Lab Visits

  1. 2019 December – Visiting Researcher to Professor Tony Bagnall's Group at School of Computing Sciences, University of East Anglia (UEA) – Norwich
  2. 2018 May – Visiting PhD Student to Professor Eamonn Keogh‘s Lab at Computer Science & Engineering Department, University of California (UCR) – Riverside

Contact

I am available on LinkedIn, ResearchGate, Twitter as well as Github. Otherwise, feel free to drop me an email at the email address below.

Location:

Faculty of Information Technology, Monash University