Nick Lim Jin Sean

I’m a Postdoctoral Research Fellow based in New Zealand.

My research interests include deep learning explainability, weak supervision, and environmental data science.

I’m passionate about technology, education, and using AI for real-world impact.

Nick Lim Jin Sean

Postdoctoral Research Fellow

Hello There!

I am a Postdoctoral Research Fellow with a background Statistical Learning (Machine Learning) and research focus on deep learning explainability and environmental data science. My professional journey includes prior experience as a Design Automation Engineer at a major semiconductor multinational corporation, where I honed my technical and problem-solving skills. Passionate about technology and education, I enjoy sharing knowledge and empowering others through teaching and mentorship. My strong technical foundation is complemented by hands-on experience in research and industry. In my leisure time, I indulge in photography, paper craft, music, and exploring mountains. While I am an avid fan of gaming, I stick to strategy and role-playing games, which align with my analytical mindset. I also engage deeply with topics such as philosophy, politics, and social justice, advocating for the welfare of children and equity in society.

Website https://www.nicklim.com
Address FG2.07, AI Institute, University of Waikato, 3210 Hamilton East, Hamilton, New Zealand
  • 01
    Postdoctoral Research Fellow
    University of Waikato
    February 2020 - Present

    Conducting research on deep learning explainability and uncertainty estimation. Leading projects involving weak supervision for object localization and environmental data analysis.

    Supervising postgraduate students on topics like satellite image super-resolution and machine learning for ecological datasets.

  • 02
    Component Design Engineer, Design Automation Engineer
    Intel Corporation
    May 2004 - February 2011
    Methodology development for transistor-level fast SPICE Simulators for complex System-on-chip designs. (2005-2007, 2010)

    Developed design methodologies for transistor-level simulations and verification. Worked closely with design engineers to debug and resolve issues, earning peer-level recognition awards.

    Identified critical design flaws, including the $700M Cougarpoint PCH SATA recall issue, showcasing my technical expertise.

    Methodology Development and Process Migration (2007, 2009-2011)

    Played a key role in automating the translation of circuit designs between process nodes. Contributed to a skunkworks team that earned a division-level award for innovation.

    Development and Maintenance of Mathematical Models (2007-2010)

    Automated the generation of IBIS/.LIB models for signal integrity and timing analysis, bridging gaps between transistor designs and mathematical models under specification constraints.

    Graduate Intern Trainer and Department Trainer (2007-2010)

    Trained new hires on Intel design flow, circuit design, simulations, and soft skills. Delivered department-level training on UNIX and proprietary environments.

Education
  • 01
    Doctorate of Philosophy, Statistics

    University of Waikato

    2015 - 2019
    Hamilton, New Zealand

    My doctoral research focused on "Ensemble Learning in High Dimension Datasets," supervised by Dr. Robert Durrant. I explored the impact of random subspace projections on classifier accuracy and ensemble diversity. Awarded Best Conference Presenter at the 2017 New Zealand Mathematics and Statistics Postgraduate Conference for my talk "Meeting the Modern Prometheus: An Introduction to Deep Learning from a Mathematics and Statistics Perspective." Recipient of the University of Waikato Doctoral Scholarship.

  • 02
    Master of Science (Research), Mathematics

    University of Waikato

    2013 - 2015
    Hamilton, New Zealand

    My master's research focused on the decomposition of bipartite graphs into stars within combinatorics. Recipient of the A Zulauf Scholarship and admitted to the Golden Keys Honour Society. Graduated with First-Class Honours and a GPA of 8.25/9.00.

  • 03
    Bachelor of Engineering, Electronics (Telecommunications)

    Multimedia University

    1999 - 2004
    Cyberjaya, Malaysia

    Achieved multiple entries to the Dean's List and was runner-up in the Intervarsity Engineering Competition in my second year. Graduated with First-Class Honours and a GPA of 3.69/4.00.

Publications
  • A comparative study of four deep learning algorithms for predicting tree stem radius measured by dendrometer
    2025

    G. Cassales, S. Salekin, N. Lim, D. Meason, A. Bifet, B. Pfahringer, E. Frank. Published in Ecological Informatics, 103014, 2025.

  • Enhancing aerial imagery analysis: leveraging explainability and segmentation
    2024

    A. Dwivedi, N. Lim, A. Bifet, E. Frank, B. Pfahringer. Presented at the International Conference on Machine Intelligence for GeoAnalytics and Remote Sensing, 2024.

  • Showcasing the TAIAO project: providing resources for machine learning from images of New Zealand's natural environment
    2023

    N. Lim, A. Bifet, D. Bull, E. Frank, Y. Jia, J. Montiel, B. Pfahringer. Published in the Journal of the Royal Society of New Zealand, 53(1), 69-81, 2023.

  • Studying and exploiting the relationship between model accuracy and explanation quality
    2021

    Y. Jia, E. Frank, B. Pfahringer, A. Bifet, N. Lim. Presented at the Machine Learning and Knowledge Discovery in Databases. Research Track, 2021.

  • A diversity-aware model for majority vote ensemble accuracy
    2020

    N. Lim, R.J. Durrant. Presented at the International Conference on Artificial Intelligence and Statistics, 2020.

  • Linear dimensionality reduction in linear time: Johnson-Lindenstrauss-type guarantees for random subspace
    2017

    N. Lim, R.J. Durrant. Preprint available at arXiv:1705.06408.

  • Custom digital cell generation flow for 65nm processes
    2009

    K.L. Yeoh, J.S. Lim, K.L. Goh, S.M. Tee. Presented at the SoC Design Conference, 2009.

  • Ensemble learning of high dimension datasets
    2019

    N. Lim. (2019). Doctoral thesis, University of Waikato. Available at hdl:10289/13422.

Miscellanous
Organizational Committees
  • AI Hackathon Bootcamp
    2024

    Conducted a tutorial on AI techniques and practical applications during the AI Hackathon Bootcamp at the University of Waikato.

  • IndigiData Aotearoa Wānanga
    2023

    Delivered a beginner-friendly workshop on Scikit-Learn at the IndigiData Aotearoa Wānanga.

  • Machine Learning for Flood Practitioners
    2023

    Presented an applied workshop on machine learning techniques for flood prediction at the Waikato Regional Council.

  • Publicity Chair - The 21st Australasian Data Mining Conference (AUSDM'23)
    2023

    Led publicity efforts for AUSDM'23, enhancing visibility and participation in the conference.

  • Working Committee - Asian Conference of Machine Learning
    Oct 2016

    Contributed as a graduate student in the working committee, assisting in organizing logistics and session management.

  • Central Organizing Committee - New Zealand Mathematics and Statistics Post-Graduate Conference
    Nov 2015

    Played a key role in the central organizing committee, overseeing event planning and coordination for the conference.