Events

Seminar on "Negative Inductance: A Potential Game Changer" by Prof. Michael Tse

Date: 24 November 2023, Friday Time: 4:30 PM Venue: YEUNG P4302, City University of Hong Kong Zoom Meeting ID: 967 1968 0176 Password: 123456 Speaker: Prof. Michael Tse, City University of Hong Kong Negative Inductance: A Potential Game Changer Prof. Michael Tse, City University of Hong Kong   Abstract: Negative reactance, a previously absent concept in the real world, will enable the easy resolution of one of the most common problems in electrical systems! Power and energy systems often face limitations in power capacity and efficiency due to the inevitable presence of unwanted reactive power circulation. Employing a dual reactive element to counteract any unwanted reactance has been the only solution choice, for example, using capacitance to counteract leakage inductance. Such solutions involve complicated design processes and costly realizations due to the resonance nature of reactive power compensation. Up to now, there has been no alternative due to the absence of negative-valued counterparts for capacitance and inductance in the real world. Our negative inductance synthesizer can cancel real inductance directly, and change the way compensation has been done in the past century! No more resonance! No more frequency sensitivity! No more need for precision design!   Speaker’s Bio: Chi K. Michael Tse graduated from the University of Melbourne. He is Chair Professor of Electrical Engineering at City University of Hong Kong. He is/was honorary professor and distinguished fellow with several Australian, Canadian and Chinese universities, including Melbourne University, RMIT University, University of Western Australia and Calgary University. His research interests are primarily in power electronics and nonlinear systems.   WEBINAR WEBSITE: http://cccn.ee.cityu.edu.hk/webinar/

29th Congregation cum EEE Outstanding Alumni Award Presentation Ceremony

The 29th Congregation cum EEE Outstanding Alumni Award Presentation Ceremony was held at the Jockey Club Auditorium on 21 November 2023. It was a joyous occasion filled with pride and excitement to celebrate the graduation of more than 600 students from our undergraduate and postgraduate programmes. The EEE Outstanding Alumni Awards were also presented to the recipients, including Dr Kang Kuen Lee, Ir Dr Barry Mok, Mr Mike Ng, and Dr Fengze Tan, in this event. Their significant achievements in the respective fields presented in this ceremony gave the fresh graduates who attended the Congregation great encouragement to pursue success in their future careers.

Seminar on "Blockchain-Enabled Social Media Network for Mitigating Misinformation Spread" by Prof. Lorry Rui Luo

Date: 17 November 2023, Friday Time: 4:30 PM Venue: YEUNG B5-207, City University of Hong Kong Zoom Meeting ID: 967 1968 0176 Password: 123456 Speaker: Prof. Lorry Rui Luo, City University of Hong Kong   Blockchain-Enabled Social Media Network for Mitigating Misinformation Spread Prof. Lorry Rui Luo, City University of Hong Kong   Abstract: In this talk, we present a novel blockchain protocol, known as BE-SMN (Blockchain-Enabled Social Media Network), designed to address the rampant spread of misinformation in online platforms. Our approach leverages the information transmission-time distribution and models the transmission of misinformation as double-spend attacks on a blockchain framework. By integrating the misinformation distribution into the classic SIR (Susceptible, Infectious, or Recovered) model, we introduce a modified SIR model that replaces the traditional single rate parameter. This adaptation allows us to analyze the impact of misinformation propagation within a multi-community network. Through numerical simulations, we demonstrate the effectiveness of our proposed blockchain-enabled social media network in curbing the spread of misinformation. Specifically, we showcase how our network outperforms a baseline network by effectively flattening the curve of the infected population. This talk offers insights into combating the pervasive issue of misinformation in social media platforms. By leveraging blockchain technology, we aim to contribute to the development of robust and reliable mechanisms for safeguarding the integrity of information dissemination in online communities.   Speaker’s Bio: Dr. Rui Luo earned his BEng from Tsinghua University, and his PhD degree from Cornell University. His research interests include statistical signal processing and complex networks. Currently, Dr. Rui Luo is an Assistant Professor in the Department of Systems Engineering at City University of Hong Kong.

Seminar on "Smart Grid and Renewable Energy Integration: Challenges, mitigation strategies, and associated grid codes” conducted by Dr Manoj Datta

Date: 14 November 2023, Tuesday Time: 10:00 am Venue: Room CD634, Department of Electrical and Electronic Engineering, PolyU Speaker: Dr Manoj Datta, Senior lecturer, School of Electrical and Biomedical Engineering, RMIT University

Seminar on "Image and Video Restoration and Benchmarking in Bitstream Corruptions" by Dr Yi Wang

Date: 10 November 2023, Friday Time: 4:30 PM Venue: CD634, The Hong Kong Polytechnic University Zoom Meeting ID: 270 294 7238 Password: 123456 Speaker: Dr Yi Wang, The Hong Kong Polytechnic University   Image and Video Restoration and Benchmarking in Bitstream Corruptions Dr Yi Wang, The Hong Kong Polytechnic University   Abstract: Image and video restoration is a long-standing problem in computer vision, which aims to recover or improve the image/video quality that has been degraded by various corruptions such as noise, blur, and compression artifacts. The restoration methods can also be used to recover crucial visual information for digital forensics and make AI-based vision robust to common corruptions. In this talk, we investigate a real-world image and video restoration problem with bit errors on the encoded bitstream due to unreliable communication channels or physical damage of storage medium. The bitstream corruptions cause complicated and unpredictable error patterns in the pixel domain, such as image block misalignment, blocking artifacts, color artifacts, ghosting effect, content loss, and novel combinations of those, which cannot be addressed by existing techniques trivially. We will present our recent studies on bitstream-corrupted image/video restoration and benchmarking.   Speaker’s Bio: Dr. Yi Wang received the BEng in Electronic and Information Engineering and MEng in Signal and Information Processing from Northwestern Polytechnical University, China, and earned PhD in the School of Electrical and Electronic Engineering from Nanyang Technological University, Singapore, in 2021. He is currently a Research Assistant Professor in the Department of Electrical and Electronic Engineering, The Hong Kong Polytechnic University, Hong Kong. He has published more than 20 papers in journals and international conferences, including IEEE Transactions (e.g., IEEE TIP, TCSVT, TNNLS, and TMM), CVPR, and NeurIPS. He worked as a Research Fellow in Nanyang Technological University, Singapore, from 2021 to 2023. His research interest includes Image/Video Processing, Computer Vision, Machine Learning, and Digital Forensics. He is IEEE Member. He served as Associate Editor of The Visual Computer.

Seminar on "Security Concerns in Islands With High Renewables Penetration” conducted by Prof Nikos Hatziargyriou

Date:  8 November 2023, Wednesday Time:  4:00 pm Venue: Room CD303, Department of Electrical and Electronic Engineering, PolyU  Speaker: Prof Nikos Hatziargyriou

Seminar on "Harnessing the Power of Light: The Journey of Distributed Fiber Optic Sensors" by Dr Huan Wu

Date: 3 November 2023, Friday Time: 4:30pm Venue: CD634, The Hong Kong Polytechnic University Zoom Meeting ID: 270 294 7238 Password: 123456 Speaker: Dr Huan Wu, The Hong Kong Polytechnic University   Harnessing the Power of Light: The Journey of Distributed Fiber Optic Sensors Dr Huan Wu, The Hong Kong Polytechnic University   Abstract: Optical fiber, one of the top innovations in twentieth century, is a ubiquitous technology that powers a vast global network, providing high-speed, low latency Internet connectivity. Though widely known for its communication capabilities, optical fiber has another important application in the form of optical fiber sensors (OFSs). Traditional point sensors, which measure a single point or a small area, often fail to provide comprehensive data over large areas. To address this limitation, the concept of distributed fiber optic sensors (DFOSs) was introduced. DFOSs facilitate continuous, real-time monitoring of physical parameters along the entire length of the fiber, achieving a constant flow of data over expansive areas. This unique attribute makes DFOSs ideal for the surveillance of large structures such as pipelines, bridges, and dams, where abnormal or damages may span a significant distance. This talk will present the basic principles of DFOSs and explore some of their applications in industry.   Speaker’s Bio: Dr. Huan Wu received a B. Eng. Degree from Nanjing University of Aeronautics and Astronautics in 2013, followed by a Ph.D. degree from the Chinese University of Hong Kong (CUHK) in 2018. Serving as a postdoctoral fellow in the Department of Electronic and Information Engineering (EIE) at HK PolyU from 2018 to 2020 and later in the Department of Land Surveying and Geoinformatics (LSGI) at HK PolyU from 2020 to 2022, she currently is Research Assistant Professor in the Department of Electrical and Electronics Engineering (EEE). Her research interests include distributed fiber optic sensors and their applications. Dr. Wu has published over 20 papers on IEEE Communications Magazine, IEEE Transactions on Instrumentation and Measurement (TIE), IEEE Journal of Lightwave Technology (JLT), Optics Express (OE) etc. She also serves as a technical consultant for Water Supplies Department (WSD), The Hong Kong SAR Government.

Seminar on "To Reduce Power Outage Risk: Cascading Failure Modeling and Analysis in Modern Power Grids" by Dr Dong Liu

Date: 27 October 2023, Friday Time: 4:30pm Venue: YEUNG Building B5-207, City University of Hong Kong Zoom Meeting ID: 967 1968 0176 Password: 123456 Speaker: Dr Dong Liu, City University of Hong Kong   To Reduce Power Outage Risk: Cascading Failure Modeling and Analysis in Modern Power Grids Dr Dong Liu, City University of Hong Kong   Abstract: Power outages have a catastrophic impact on modern society, disrupting daily routines, causing economic losses, and even threatening public safety. A series of historical blackout events have demonstrated that millions of residences have to live without electricity for a certain period when large-scale systems disturbance occurred. To reduce outage risk in increasingly complex power grids, a great deal of effort has been devoted to cascading failure modeling and analysis over the past few decades. Cascading failure process, where an initial failure triggers a sequence of subsequent failure events and eventually leads to a large-scale blackout. This seminar will discuss cascading failure modeling and analysis in future grids considering the deepened cyber coupling and increased penetration of power electronics. In light of the 2015 Ukraine power outage incident, which confirmed the possibility of power grids being targeted by cyber attacks, we propose an integrated modeling framework for assessing the robustness of cyber-coupled power grids against cascading failure. Our study demonstrates that cyber networks can help mitigate cascading failure, but faults in the cyber layer can also intensify the failure cascade and lead to catastrophic power outages. To better understand the 2019 England power outage event, which was linked to the high penetration of power electronics brought by renewable resources, we proposed a modeling framework that incorporates the dynamical process of frequency control to assess the robustness of high renewable resources-penetrated power systems. Our findings, based on this framework, indicate that the level of renewable energy penetration increases the risk of power outages, emphasizing the need for adequate protective measures.   Speaker’s Bio: Dong Liu graduated from Hong Kong Polytechnic University with BSc(Hons) and PhD degrees in 2015 and 2019, respectively. He worked briefly as a postdoc with the Institute of Textile and Clothing at PolyU, and is presently a postdoc at CityU EE department. His interests include power system robustness and complex network applications.

PolyU Information Day 2023 (Undergraduate and Taught Postgraduate Programmes)

Date 21 Oct 2023 Organiser Academic Registry   Time 10:00 - 17:00 Venue PolyU (Podium, CF Wing)   URL https://www.polyu.edu.hk/infoday     The PolyU Information Day for Undergraduate and Taught Postgraduate Programmes will be held on 21 October 2023 (Saturday) from 10:00 am to 5:00 pm at the PolyU campus. The Department of Electrical and Electronic Engineering’s booth is located at the podium in CF Wing. You are welcome to visit our booth for consultation about EEE’s progammes and join the following activities: Info Seminars   Time BEng (Honours) Scheme in Electrical Engineering 11:00 am – 11:45 am 2:00 pm – 2:45 pm BEng (Honours) / BSc (Honours) Scheme in Information and Artificial Intelligence Engineering 1:00 pm – 1:45 pm 4:00 pm – 4:45 pm MSc in Electrical Engineering 12:00 noon – 12:45 pm MSc in Electric Vehicles MSc in Electronic and Information Engineering 3:00 pm – 3:45 pm   Laboratory Tour A   Time BEng (Honours) Scheme in Electrical Engineering 10:00 am – 11:00 am 12:00 pm – 1:00 pm 3:00 pm – 4:00 pm MSc in Electrical Engineering MSc in Electric Vehicles Laboratory Tour B   Time BEng (Honours) / BSc (Honours) Scheme in Information and Artificial Intelligence Engineering 10:00 am – 11:00 am 2:00 pm – 3:00 pm 3:00 pm – 4:00 pm MSc in Electronic and Information Engineering   If you are interested in the Info Day, please register online at https://www.polyu.edu.hk/study/events/infoday/register. For more details about the Info Day, please visit https://www.polyu.edu.hk/study/events/infoday.

Seminar on "Structure and Function of Hypergraph Based High-order Networks" by Prof. Zi-Ke Zhang

Date: 20 October 2023, Friday Time: 4:30pm Venue: YEUNG Building B5-207, City University of Hong Kong Zoom Meeting ID: 967 1968 0176 Password: 123456 Speaker: Prof. Zi-Ke Zhang, Zhejiang University, Hangzhou   Structure and Function of Hypergraph Based High-order Networks Prof. Zi-Ke Zhang, Zhejiang University, Hangzhou   Abstract: Hypergraph, as one of the most representative paradigm to describe wide-range high-order interactions, has provided a versatile yet powerful tool to illustrate a vast class of unsolved or incompletely described questions in complex networks. In this talk, I would like to briefly introduce the concept, methods, as well as our recent advances in evolution of scientist collaboration, information maximization and possible extensions, i.e. human pose estimation.   Speaker’s Bio: Zi-Ke Zhang receoved his Ph.D in Information Physics in 2011 from the University of Fribourg, Switzerland. He is serving as a full professor at College of Media and International Culture, Zhejiang University. Before that, he was a full professor at the Research Center for Complexity Sciences at Hangzhou Normal University. His main research interests is the interdisciplinary area of data- and model-driven social computing oriented research questions, He has published more than 100 peer-reviewed journal papers with more than 5600 times from Google Scholar. He was also selected as a Zhejiang Provincial Young academic Leader (2017), and Outstanding Teacher of Zhejiang Province (2018).