New Ways of Using Ultrasound for Imaging and Diagnoses
Speaker:Dr. Alfred C. H. Yu
Research Assistant Professor
Department of Electrical and Electronic Engineering
University of Hong Kong
Date & Time:28 Jan 2011 (Friday) 10:00 - 12:00
Organized by:Department of Electrical and Electronics Engineering


This lecture will give an introduction on the exciting developments and advances in the field of nonlinear control, with the focus on nonsmooth feedback stabilization and tracking for a significant class of uncertain systems that is inherently nonlinear (in the sense that the first approximation is uncontrollable and the uncontrollable modes have eigenvalues on the right-half plane), and hence cannot be dealt with by any linear or smooth state feedback, even locally. In this talk, we will also briefly discuss some major open and challenging problems such as output feedback control of nonlinear systems with unstabilizable/undetectable linearization, on which the research is progressing currently. The purpose of this seminar is two-fold: 1) to provide an overview on the development of non-smooth control of nonlinear systems over the past two decades, covering from the differential geometric approach to the systematic design methodologies for global analysis and synthesis of nonlinear systems using smooth and non-smooth feedback; 2) to give audiences a broad perspective of the state-of-the-art in non-smooth feedback design, provide an up-to-date account of the most recent advances and progress in some critical and fundamental issues in the field of nonlinear control, explore new ideas and point out certain promising directions, where many challenging issues remain unsolved.


Dr. Alfred Yu is a Research Assistant Professor in the Department of Electrical and Electronic Engineering and a core faculty member of the Medical Engineering Program at the University of Hong Kong. Immigrated to Canada when he was 10 years old, Alfred received his Ph.D. training in Biomedical Engineering at the University of Toronto. He has a keen interest in the engineering science of biomedical ultrasound. His group's current research spans three areas in ultrasound: 1) development of new system hardware, 2) design of novel imaging paradigms, and 3) cellular investigations of ultrasound-induced therapeutic effects.

Dr. Yu is an IEEE member, and is now the Chair of the IEEE-EMBS Hong Kong Chapter to help promote biomedical engineering as one of the high-potential research areas in Hong Kong. He is also an active contributor to the scholarship of teaching and learning. In 2009, he received the IEEE Real World Engineering Project Award: an international recognition for designing high-quality, tested, society-focused project courses for junior engineering students worldwide.