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PRODID:-//Department of Electrical and Computer Engineering (HKUECE) 電機與計算機工程系 - ECPv6.16.0//NONSGML v1.0//EN
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X-WR-CALNAME:Department of Electrical and Computer Engineering (HKUECE) 電機與計算機工程系
X-ORIGINAL-URL:https://ece.hku.hk
X-WR-CALDESC:Events for Department of Electrical and Computer Engineering (HKUECE) 電機與計算機工程系
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TZID:Asia/Hong_Kong
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TZOFFSETFROM:+0800
TZOFFSETTO:+0800
TZNAME:HKT
DTSTART:20230101T000000
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BEGIN:VEVENT
DTSTART;TZID=Asia/Hong_Kong:20240531T110000
DTEND;TZID=Asia/Hong_Kong:20240531T120000
DTSTAMP:20260512T170421
CREATED:20240506T014649Z
LAST-MODIFIED:20250114T043911Z
UID:18494-1717153200-1717156800@ece.hku.hk
SUMMARY:Localization of a Non-Cooperative Object Irrespective of the Range to Receivers
DESCRIPTION:Abstract\nPosition-related services and applications appear everywhere in our daily lives and precise positioning is indispensable.  For non-cooperative localization of an object by time difference of arrival (TDOA) such as in an integrated sensing and communications (ISAC) environment\, it requires the knowledge that the object is near to or far from the receivers.  If the object is close\, a near-field model is used to determine the unique coordinates of the object.  If it is distant\, a far-field model needs to be applied instead to obtain its direction.  Such knowledge\, however\, is seldom available in practice. This talk introduces a novel representation of the object position\, called the modified polar representation (MPR)\, which can eliminate the necessity of such knowledge.  MPR leads to a unified model that naturally yields the unique coordinates of the object if it is near and the direction if it is far.  Both the theory by the Cramer-Rao Lower Bound (CRLB) and the Hybrid Bhattacharyya-Barankin (HBB) Bound\, and the simulations by the Maximum Likelihood Estimator (MLE) support the effectiveness of MPR for TDOA localization. \nSpeaker:\nDr. Dominic K. C. HO\nProfessor\, University of Missouri\, USA \nBiography of the Speaker\nDr. Dominic K. C. HO was born in Hong Kong.  He received the BSc degree with First Class Honors and the PhD degree in Electronic Engineering\, both from the Chinese University of Hong Kong.  He was a research associate at the Royal Military College of Canada\, a member of scientific staff at the Bell-Northern Research\, and a faculty at the University of Saskatchewan\, Canada.  Since 1997\, he has been with the University of Missouri\, where he is a professor in the Electrical Engineering and Computer Science Department.  His research interests are in sensor array processing\, source localization\, subsurface object detection\, and wireless communications.  He has been active in the International Telecommunications Union (ITU) standard developments between 1995 and 2012.  He was the rapporteur of one recommendation and the editor of several others.  He was an Associate Editor of the IEEE Transactions of Signal Processing (2003-2006\, 2009-2013) and the IEEE Signal Processing Letters (2004-2008).  He served as the Chair of the IEEE Sensor Array Multichannel (SAM) Technical Committee from 2013 to 2014 and the Past Chair in 2015.  He was Technical Co-Chair of the IEEE International Conference on Acoustics\, Speech and Signal Processing (ICASSP) held in Shanghai\, in 2016.  He is an inventor of 22 patents in the United States\, Canada\, Europe and Asia on geolocation and signal processing for wireless communications.  He is a fellow of the IEEE. \nOrganizer\nProf. Y.C. WU \nAll are welcome! We look forward to seeing you!
URL:https://ece.hku.hk/events/20240531-1/
LOCATION:Room CB-603\, 6/F\, Chow Yei Ching Building\, The University of Hong Kong
CATEGORIES:Seminar
ATTACH;FMTTYPE=image/jpeg:https://ece.hku.hk/wp-content/uploads/2024/05/1280-4.jpg
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BEGIN:VEVENT
DTSTART;TZID=Asia/Hong_Kong:20240531T140000
DTEND;TZID=Asia/Hong_Kong:20240531T170000
DTSTAMP:20260512T170421
CREATED:20240521T083633Z
LAST-MODIFIED:20250114T043839Z
UID:18570-1717164000-1717174800@ece.hku.hk
SUMMARY:Real-time Twisting on a Chip
DESCRIPTION:Meeting ID: 939 1846 8563 \nAbstract\nOptical nanostructures and two-dimensional materials (2DM) have optical properties that are widely tunable via several approaches\, such as heating\, electrostatic gating\, and interfacial engineering such as twisting. Being able to tailor the interfacial properties in a similar real-time manner represents the next leap in our ability to modulate the underlying physics and build exotic photonics devices. We demonstrate the first on-chip platform designed for optical nanostructures and 2D materials with in situ tunable interfacial properties\, utilizing a microelectromechanical system (MEMS). Each of these compact\, cost-effective\, and versatile devices is a standalone micromachine that allows voltage-controlled approaching\, twisting\, and pressurizing of two sheets of materials with high accuracy. \nSpeaker\nDr. Haoning TANG\nHarvard Quantum Initiative Postdoctoral Fellow\,\nJohn A. Paulson School of Engineering Applied Science\,\nHarvard University \nBiography of the Speaker\nDr. Haoning TANG is the Harvard Quantum Initiative Postdoctoral Fellow at John A. Paulson School of Engineering Applied Science at Harvard University. She obtained bachelor’s degree at The Hong Kong University of Science and Technology\, and Ph.D. at Harvard. Her primary research interest is in the nonlinear and quantum optical properties of metamaterials and low-dimensional materials\, and the engineering of these properties through advanced nanotechnologies including micro-electricalmechanical systems (MEMS). \nOrganizer\nProf. Kaibin HUANG \nAll are welcome! We look forward to seeing you!
URL:https://ece.hku.hk/events/20240531-2/
LOCATION:Online via Zoom
CATEGORIES:Seminar
ATTACH;FMTTYPE=image/jpeg:https://ece.hku.hk/wp-content/uploads/2024/05/1280-3.jpg
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BEGIN:VEVENT
DTSTART;TZID=Asia/Hong_Kong:20240531T150000
DTEND;TZID=Asia/Hong_Kong:20240531T160000
DTSTAMP:20260512T170421
CREATED:20240521T090117Z
LAST-MODIFIED:20250114T043757Z
UID:18572-1717167600-1717171200@ece.hku.hk
SUMMARY:Integrated Nonlinear Multimode Photonics for Information Processing and Computation
DESCRIPTION:Meeting ID:937 8072 8049\n \nAbstract\nPhotonics technology has become indispensable in communication\, imaging\, sensing\, metrology\, and more recently\, in signal processing and computation. These advancements are made possible through optical systems that leverage the control of multiple degrees of freedom of light\, e.g.\, in space/momentum\, time/frequency\, angle/orbital angular momentum and polarization. Recently\, the integration of table-top optical systems into photonic integrated circuits has not only miniaturized the form factor but also enhanced light-matter interaction. This offers enormous opportunities to explore fundamental nonlinear optical physics and unlock new functionalities in integrated photonics. \nThe first part of my talk focuses on the fundamental aspects of integrated nonlinear photonics. I will show how we optically induce the second-order ((2)) nonlinearity in silicon nitride photonics\, along with techniques to achieve quasi-phase-matching for the second-harmonic generation process. Moreover\, I will discuss the generalization of our approach to other (2) nonlinear processes\, such as sum-frequency generation\, backward second-harmonic generation\, and combined (2) and Kerr nonlinear effects for different participating spatial modes. \nThe second part of my talk is on the applications of integrated nonlinear multimode photonics for information processing and computing. I will discuss the use of integrated Kerr microcombs for microwave photonics\, showcasing the reconfigurable microwave filtering based on inherently rich soliton states from silicon nitride microresonators. I will also show how we combine second-harmonic generation and multiple light scattering in disordered lithium niobite (2) nanocrystals for various machine learning applications. Additionally\, I will introduce a new reservoir computing paradigm harnessing the massive spatial parallelism of light. \nSpeaker\nDr. Jianqi HU\nPostdoc Researcher\,\nÉcole Polytechnique Fédérale de Lausanne (EPFL)\, Switzerland \nBiography of the Speaker\nDr. Jianqi HU is currently a postdoc researcher in Prof. Tobias Kippenberg’s group at École Polytechnique Fédérale de Lausanne (EPFL) in Switzerland. He received the B.E. from the University of Electronic Science and Technology of China in 2016\, and the Ph.D. in photonics from EPFL in 2021\, advised by Prof. Camille Brès. After completing the Ph.D.\, he continued his research as a postdoc at EPFL from 2021 to 2022\, and then he was an SNF postdoc fellow at Ecole Normale Supérieure\, France\, working with Prof. Sylvain Gigan from 2022 to 2023. His research interests include integrated nonlinear photonics\, frequency microcombs\, structured light\, and photonic computing. \nOrganizer\nProf. Kaibin HUANG \nAll are welcome! We look forward to seeing you!
URL:https://ece.hku.hk/events/20240531-3/
LOCATION:Online via Zoom
CATEGORIES:Seminar
ATTACH;FMTTYPE=image/jpeg:https://ece.hku.hk/wp-content/uploads/2024/05/1280-2.jpg
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