Chang, Zhangyu 常章豫

Chang, Zhangyu 常章豫

Ph.D. in Computer Science

Curriculum Vitae

Chang, Zhangyu received his Ph.D. and M.Phil. degrees in Computer Science and Engineering in 2015 and 2024, respectively, from the Hong Kong University of Science and Technology (HKUST) in Hong Kong. He also earned his B.Sc. degree with highest honors in Physics and Computer Science (double major) in 2011 from HKUST. His research interests include multimedia networking, fog/edge computing, and video/location data analytics.

Education

Publications

Journal Publications

  1. Z. Chang and S.-H. G. Chan, “Bi-Criteria Approximation for a Multi-Origin Multi-Channel Auto-Scaling Live Streaming Cloud,” IEEE Transactions on Multimedia, Vol. 25, pp. 2839-2850, July 2023. [Online]. Available: https://doi.org/10.1109/TMM.2022.3152093 [Slides (PDF)]
  2. Z. Chang and S.-H. G. Chan, “An Approximation Algorithm to Maximize User Capacity for an Auto-scaling VoD System,” IEEE Transactions on Multimedia, Vol. 23, pp. 3714-3725, October 2021. [Online]. Available: https://doi.org/10.1109/TMM.2020.3031068 [Slides (PDF)]
  3. Z. Chang and S.-H. G. Chan, “Video Management and Resource Allocation for a Large-Scale VoD Cloud,” ACM Transactions on Multimedia Computing, Communication and Applications (TOMM) Special Issue on Multimedia Big Data: Networking, vol. 12, pp72:1-72:21, Sept. 2016. [Online]. Available: https://doi.org/10.1145/2983638 [Slides (PDF)]
  4. Z. Chang and S.-H. G. Chan, “Bucket-Filling: An Asymptotically Optimal VoD Network with Source Coding,” IEEE Transactions on Multimedia, Vol. 17, No. 5, pp. 723-735, May 2015. [Online]. Available: https://doi.org/10.1109/TMM.2015.2416636 [Slides (PDF) | MPhil Thesis]

Conference Publications

  1. J. Dai, Z. Chang, and S.-H. G. Chan, “Delay Optimization for Multi-source Multi-channel Overlay Live Streaming,” in Proceedings of IEEE ICC 2015 - Communications Software, Services and Multimedia Applications Symposium (ICC’15), (London, United Kingdom), pp. 8587-8592, 8-12, June 2015. [Online]. Available: https://doi.org/10.1109/ICC.2015.7249435 [Slides (PDF)]

Others

  1. Ph.D. Qualifying Exam: “Video Replication and Access over Fog-based Architecture”. [Slides (PDF)]
  2. Ph.D. Thesis: “Approximation Algorithms for Auto-Scaling Video Cloud”. [Slides (PDF)]

Project Experience

  • 2017 - 2024 SmartAP: Ubiquitous People Sensing and User Analytics with Wi-Fi
    • Supported by Hong Kong General Research Fund
    • Contribution: Developed lightweight, and learning-free system for device counting, cutting estimation error by 66%.
  • 2012 - 2014 Streamphony: A Novel Cost-Effective Video Streaming Cloud over the Global Internet
    • Supported by Hong Kong General Research Fund
    • Contribution: Developed approximation algorithm to optimize deployment cost, reducing the optimization gap by multiple times.

Work Experience

Teaching Assistant

  • Department of Computer Science and Engineering (CSE), HKUST
    • 2017 Fall [COMP5621] Computer Networks
    • 2016 Spring [COMP2021] Unix & Script Programming
    • 2015 Fall [COMP3511] Operating Systems
    • 2012 Fall [COMP1021] Introduction to Computer Science (Python Programming)
    • 2012 Summer [COMP4311] Principles of Database Design
    • 2012 Spring [COMP3711] Design and Analysis of Algorithms

Awards

The Hong Kong University of Science and Technology (HKUST)

  • Oct 2010 & Nov 2009 Paul Ching Wu Chu Scholarships for Physics Students (twice)
  • 2008 - 2010 Deans List Award (6 times consecutively)
  • Aug 2008 The Physics Department’s Scholarship for Preparation Year Students

China Soong Ching Ling Foundation

  • Sep 2007 - Aug 2011 Zhi Yuan Scholarships

Skills

  • Languages
    • English (Fluent)
    • Chinese (Native)
    • Norwegian (Fair)
    • Japanese (Fair)
  • Programming Languages
    • C++
    • Java
    • Python
    • Pascal
    • MIPS

Miscellaneous