Events

PolyU x NuttyShell Cybersecurity CTF 2025

Competition Info 19 April 2025, 8:00PM HKT - 21 April 2025, 8:00PM HKT Mode: Online (The system will operate for 48 hours continuously, and participants can access it anytime during the contest)   Contest Information https://2025.polyuctf.com/

Seminar on "Impedance-Based Approach for Stability Analysis in Inverter-Dominated Power Systems" by Dr Bei Sun

Date: 28 March 2025, Friday Time: 4:30 pm Venue: Y5-305, City University of Hong Kong Zoom Meeting ID: 899 0158 1173 Password: 123456 Speaker: Dr Bei Sun, City University of Hong Kong   Impedance-Based Approach for Stability Analysis in Inverter-Dominated Power Systems Dr Yue Zhu, City University of Hong Kong   Abstract: The high and growing penetration of inverter-based resources (IBR) in modern power systems has brought challenges to system stability, especially to small-signal stability reflected by the concerning oscillations. This seminar will discuss the impedance-based approach for oscillation root-cause tracing, tuning, and early warning. The new approach establishes the relationship between the impedance model and the conventional state-space model and opens up the path of using black-box impedance model to extract useful insights similar to those obtained from the white-box model. New technologies, such as using a single perturbation to restore the whole-system impedance model based on a hybrid data/model-driven method will also be introduced.   Speaker’s Bio: Dr. Yue Zhu is an Assistant Professor in the Department of Electrical Engineering, City University of Hong Kong (CityUHK). Prior to joining CityUHK, He was a Postdoctoral Research Associate in Department of Electrical and Electronic Engineering, Imperial College London. He received his B.Eng. and M.Sc. degrees from Zhejiang University and his PhD degree from Imperial College London. His research focuses on stability, dynamics, and control of large-scale inverter-dominated power systems, addressing critical challenges including system oscillations, data-driven impedance identification, and system strength assessment for connections of new inverter-based resources.   WEBINAR WEBSITE: https://www.ee.cityu.edu.hk/~cccn/webinar/

Seminar on "Population Dynamics of Frog Species under Seasonal Factors and Disease Transmission" by Dr Bei Sun

Date: 21 March 2025, Friday Time: 4:30 pm Venue: Y5-305, City University of Hong Kong Zoom Meeting ID: 899 0158 1173 Password: 123456 Speaker: Dr Bei Sun, Hong Kong Polytechnic University Population Dynamics of Frog Species under Seasonal Factors and Disease Transmission Dr Bei Sun, Hong Kong Polytechnic University   Abstract:Frog populations play a vital role in ecosystems, and their decline can significantly impact biodiversity and ecosystem stability. Their growth and reproduction are heavily influenced by seasonal climates and suitable ecological conditions. My research reviews stage-structured single-species population models, utilizing integral forms and partial differential equations under gamma and Dirac distributions. Guided by biological insights, I develop models that incorporate seasonal succession, competition, pathogen transmission, and mating behaviors. Using theories of monotone dynamical systems, global attractors, persistence, coexistence states, and basic reproduction numbers, I analyze key properties and global dynamics. Numerical simulations validate theoretical findings, assess parameter sensitivity, and evaluate factors influencing population dynamics.   Speaker’s Bio:Dr. Bei Sun received her Ph.D. in Applied Mathematics from the Hong Kong Polytechnic University in February 2025, following a master’s degree in applied Statistics from Northeastern University in 2021. With an interdisciplinary background in mathematics and statistics, her research focuses on applied dynamical systems, differential equations, mathematical epidemiology, and theoretical biology. She has published five papers in reputable international journals, including Mathematical Biosciences, Journal of Mathematical Biology, and Journal of Biological Systems.   WEBINAR WEBSITE: https://www.ee.cityu.edu.hk/~cccn/webinar/

Seminar on "Intelligent Reflecting Surface-Based Localization of Mixed Near-Field and Far-Field Targets" by Dr Weifeng Zhu

Date: 14 March 2025, Friday Time: 4:30pm Venue: Webinar Only Zoom Meeting ID: 815 2944 9313 Password: 123456 Speaker: Dr Weifeng Zhu, Hong Kong Polytechnic University   Intelligent Reflecting Surface-Based Localization of Mixed Near-Field and Far-Field Targets Dr Weifeng Zhu, Hong Kong Polytechnic University   Abstract: Integrated sensing and communication (ISAC) is considered as one of the key usage scenarios in sixth-generation (6G) cellular systems, where localization is considered to be one of the most crucial functionalities. In 6G ISAC systems, base stations (BSs) are expected to be the primary anchors to perform localization. However, line-of-sight (LOS) paths between BSs and targets can be blocked by a variety of obstacles, challenging existing BS-centric localization algorithms. In this webinar, we consider the possibility of employing an intelligent reflecting surface (IRS) to localize the mixed near-field and far-field targets that are in the non-line-of-sight (NLOS) region of the BS. Moreover, a novel three-phase protocol is presented to localize targets by extracting their position-related information from the received signals, and the theoretical analysis is also provided to verify the effectiveness of the proposed scheme.   Speaker’s Bio: Weifeng Zhu received the B.S. degree in communication engineering from Tianjin University in 2017, and the Ph.D. degree in information and communication engineering from Shanghai Jiao Tong University in 2023, respectively. From 2023, he is a Postdoctoral Fellow in The Hong Kong Polytechnic University. His research interests include statistical signal processing, machine learning, massive random access, and integrated communication-computing-sensing.   WEBINAR WEBSITE: https://www.ee.cityu.edu.hk/~cccn/webinar/

Women in Electrical and Electronic Engineering (WiEEE) Gathering on International Women’s Day

The Women in Electrical and Electronic Engineering (WiEEE) Gathering was organized by the WiEEE Committee in the Undergraduate Teaching Laboratory on 8 March 2025. The event gathered more than 50 female undergraduate and postgraduate students, academic staff and alumni to celebrate the International Women’s Day. The participants were welcomed by Prof. C.Y. Chung, Head of the EEE Department. Ms Ziwen Pan, BEng Scheme in Electrical Engineering student and President of the WiEEE Committee, and Mr Karlen Shek, EEE alumnus and IET member, delivered speeches to share the vision of WiEEE and to encourage the students to develop their career in engineering. An interactive competition was also organized in the gathering, fostering a supportive network of growth and empowerment.

Seminar on "Online AI Control and Monitoring in Power Electronics" by Dr Tianhao (Steward) Qie

Date: 7 March 2025, Friday Time: 4:30 pm Venue: Y5-305, City University of Hong Kong Zoom Meeting ID: 899 0158 1173 Password: 123456 Speaker: Dr Tianhao (Steward) Qie, City University of Hong Kong Online AI Control and Monitoring in Power Electronics Dr Tianhao (Steward) Qie, City University of Hong Kong   Abstract:The integration of Artificial Intelligence (AI) into power electronics (PE) is revolutionizing control and monitoring systems, particularly for renewable energy systems (RES) and microgrids. Traditional control methods, such as PID and model predictive control, struggle with parameter robustness and computational demands. AI-based approaches, including Reinforcement Learning (RL) and Integral Reinforcement Learning (IRL), offer enhanced disturbance rejection, model-free operation, and adaptive control, making them ideal for dynamic and unpredictable environments. Through case studies on DC-DC converters, inverters, and wind turbine systems, AI-based controllers demonstrate superior performance in dynamic response and robustness compared to conventional methods. The seminar also introduces AI 2.0, which eliminates the need for initial stabilizing gains and ensures faster convergence, and AI 3.0, focusing on ultra-low-cost monitoring systems with minimal computational resources. Looking ahead, AI 4.0 envisions AI-aided control and monitoring for next-generation power converters.   Speaker’s Bio: Tianhao Qie received the B.E. degree in automation from Southwest University, China, in 2020. He received the M.E. degree from The University of Western Australia (UWA), Australia, in 2021 and PhD degree from The University of Western Australia (UWA), Australia, in 2024. Currently, he is a Senior RA in City University of Hong Kong, specializing in Electrical and Electronics. His research interests are AI, advanced control algorithms, power electronics converters and microgrids.   WEBINAR WEBSITE: https://www.ee.cityu.edu.hk/~cccn/webinar/

EEE Welcoming Tea Reception for First-Year Students 2025

The EEE Welcoming Tea Reception for First-Year Students 2025 was held in the Hotel ICON on 1 March 2025 for the first-year students to meet and interact with our Professors, fellow students, and accomplished alumni. The event was addressed by Prof. Chi-yung CHUNG, Head of Department. Ir Prof. Alfred SIT, Professor of Practice (Electrical Engineering) of the Department, and Ir Eric Siu Cheung MA, President of the Hong Kong Institution of Engineers, were invited to present the development and career prospects of the electrical and electronic engineering industries in Hong Kong. Besides the introduction of EEE and the Mentorship Programme, our alumna, Ms Melody Yang also shared her experience with our students. Different exhibition booths about the EEE student activities and alumni associations were also set up in the venue for the participants to mingle with each other.

Seminar on "iLLM-TSC: Integrating Reinforcement Learning and Large Language Models for Traffic Signal Control Policy Improvement" by Mr Aoyu Pang

Date: 28 February 2025, Friday Time: 4:30pm Venue: Room EF502a, The Hong Kong Polytechnic University Zoom Meeting ID: 848 7250 3733 Password: 123456 Speaker: Mr Aoyu Pang, The Chinese University of Hong Kong (Shenzhen) iLLM-TSC: Integrating Reinforcement Learning and Large Language Models for Traffic Signal Control Policy Improvement Mr Aoyu Pang, The Chinese University of Hong Kong (Shenzhen)   Abstract: This work presents a novel framework that combines Reinforcement Learning (RL) and Large Language Models (LLMs) for enhancing traffic signal control (TSC) policies. The integration of these two powerful techniques addresses key challenges in real-world traffic management, such as communication degradation (including delays, packet loss, and noise) and long-tail scenarios that involve rare but critical events (e.g., emergency vehicles).   Speaker’s Bio: Aoyu Pang received the B.Eng. degree in Automatization from the Nanjing University of Aeronautics and Astronautics (NUAA) in 2023. He is currently working toward the Ph.D. degree in Computer and Information Engineering at the Chinese University of Hong Kong, Shenzhen, China. His research interests include iintelligent transportation, reinforcement learning and V2X communication.   WEBINAR WEBSITE: https://www.ee.cityu.edu.hk/~cccn/webinar/

Seminar on "Advanced Wireless Power Transfer Technologies: Topology, Modulation, and Control" by Dr Kerui Li

Date: 21 February 2025, Friday Time: 4:30 pm Venue: Y5-305, City University of Hong Kong Zoom Meeting ID: 899 0158 1173 Password: 123456 Speaker: Dr Kerui Li, City University of Hong Kong Advanced Wireless Power Transfer Technologies: Topology, Modulation, and Control Dr Kerui Li, City University of Hong Kong   Abstract: The electronics industry is experiencing a paradigm shift due to its transition from wired to wireless charging. This transformation is set to reach new heights with the increasing adoption of wireless charging across various applications. To embrace these emerging applications, addressing technical challenges and advancing wireless power transfer (WPT) technologies becomes imperative. This seminar will start with a comprehensive examination of existing low-frequency WPT systems, exploring the stability challenges they face and introducing effective strategies to overcome them. Moreover, a highly efficient printed-circuit-board (PCB) resonator for megahertz WPT systems will be presented, showcasing its potential to advance WPT technologies into high-frequency regions. Finally, these key technologies will be summarized, and the prospects for future research will be outlined.   Speaker’s Bio: Kerui Li received the B.Eng. degree from the South China University of Technology in 2013, the M.Eng. degree from the Sun Yat-sen University in 2016, and the Ph.D. degree from The University of Hong Kong in 2021. He is currently a Research Assistant Professor in the Department of Electrical Engineering at The City University of Hong Kong. His research interests include power electronics and wireless power transfer. His professional services and research have been recognized with several prestigious awards, including the IEEE Transactions on Power Electronics Outstanding Reviewer Award (2025), two IEEE Transactions on Power Electronics Prize Paper Awards (second place in 2024 and first place in 2023), the IEEE Power Electronics Society Ph.D. Thesis Talk Award (2022), and the University of Hong Kong Power Engineering Prize (2020). WEBINAR WEBSITE: https://www.ee.cityu.edu.hk/~cccn/webinar/

PolyU and NetDragon Memorandum of Understanding Signing Ceremony

The Hong Kong Polytechnic University (PolyU) and NetDragon Websoft Holdings Limited (NetDragon) signed a Memorandum of Understanding (MoU) on 23 January 2025 on campus, marking the establishment of a strategic partnership. This close collaboration aims to promote the applications of educational technology (EdTech) in higher education globally and foster the development of tech talent through the development of artificial intelligence (AI) learning platforms, joint research, and exchange programmes. Witnessed by Prof. Kwok-yin WONG, PolyU Vice President (Education); Prof. H.C. MAN, PolyU Dean of the Faculty of Engineering; Mr Ben YAM, Chief Financial Officer of NetDragon; and Mr Wood LAU, Head of Compliance and Corporate Affairs and Company Secretary of NetDragon, the MoU was signed by Prof. Chi-yung CHUNG, Head of the Department of Electrical and Electronic Engineering and Chair Professor of Power Systems Engineering of PolyU, and Ms Doris ZHAO, General Manager of Regional Business Development of NetDragon. Under the MoU, PolyU and NetDragon will closely collaborate in three key areas. This includes the joint development of an AI learning platform aimed at enriching the learning experiences of students in Hong Kong and around the world. Both parties will also leverage their exceptional research and academic strengths, along with extensive industry experience, to engage in collaborative research focused on best practices and innovations in EdTech. In addition, they will facilitate academic and cultural exchange programmes among tertiary institutions in Hong Kong, Mainland China, and other countries and regions, fostering a global exchange of knowledge and ideas.