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What can we do with a quantum liquid?

  • 时 间:2017年6月29日(星期四)14:30 - 15:30
  • 地 点:玉泉校区邵逸夫科学馆 117报告厅

Quantum liquids are physical systems which display the effects not only of quantum mechanics but also those of quantum statistics that is of the characteristic indistinguishability of elementary particles. The most spectacular manifestations of quantum statistics are the phenomenon of Bose-Einstein condensation and the closely related one of Cooper pairing; in both cases a finite fraction of all the particles in the system are forced to all do exactly the same thing at the same time, and as a result effects which would normally be obscured by thermal noise may become visible, sometimes spectacularly so.



Multi-model Predictive Control: Controller formulation and Application to Medical Oxygen Concentrators

Multi-model Predictive Control: Controller formulation and Application to Medical Oxygen Concentrators

Speaker: Mayuresh V. Kothare, PhD, R. L. McCann Professor, Chairman | Department of Chemical and Biomolecular Engineering, Lehigh University

Lecture room: CSC-304 浙江大学玉泉校区智能系统与控制研究所(CSC)304教室

Time: 14:00, June 12 (Monday), 2017


A Multi-Model Predictive Control (M-MPC) algorithm is developed for a novel Rapid Pressure Swing Adsorption (RSPSA) oxygen concentrator system. The RPSA uses a zeolite material to purify oxygen from ambient feed air, and is designed to produce 90% oxygen for medicinal therapies. In previous work, a standard linear MPC algorithm was implemented on the RPSA which rejects disturbances and improves set point tracking in the 90% operating range, but a RPSA can produce a wide range of oxygen purities. The single linear model MPC algorithm is unable to  provide the ability to transition the purity between vastly different values. The M-MPC algorithm uses a collection of linear models each of which corresponds to a different oxygen purity range. The linear models are identified around different operating points, and use Pseudo-Random Binary Signal (PRBS) simulation data in the identification process. With this improved control algorithm, the RPSA can produce a range of oxygen purities, and reject typical RPSA process disturbances. M-MPC switching rules, operating region boundary considerations and set point tracking cases are presented and discussed. General concepts on M-MPC will be presented and ideas on stability analysis will be discussed.


Dr. M. V. Kothare is currently the Chairman of the Department of Chemical and Biomolecular Engineering and R. L. McCann Professor at Lehigh University. He holds an appointment in Bioengineering at Lehigh University and is a Visiting Professor of Biomedical Engineering at Johns Hopkins School of Medicine. He received his B.Tech. in Chemical Engineering from the Indian Institute of Technology (IIT), Bombay in 1991 and MS/PhD degrees in Chemical Engineering from the California Institute of  Technology in 1995 and 1997. He has held a postdoctoral position at Mobil Oil Corporation and various visiting positions at City College New York, Purdue University, ETH Zurich and East China U. of Science and Technology (ECUST). His interdisciplinary areas of interest span the problems of constrained and optimal predictive control theory, robustness analysis, MEMS and microchemical systems, control of microsystems, embedded control of biomedical systems, neuroengineering and closed-loop neuroprosthetic systems. Kothare is recipient of the Institute Silver Medal from IIT Bombay for ranking first in Chemical Engineering, the Ted Peterson Student Paper Award (2000) and the Outstanding Young Researcher Award (2007) (under 40 years) from the Computing and Systems Technology division of the AIChE for his contributions to the literature of computing in engineering. He has received the US National Science Foundation CAREER award (2002), the Robinson award and Rossin and Hook Professorships at Lehigh University. He was a selected attendee (one of 82 engineers, ages 30-45) at the 2008 Frontiers of Engineering symposium of the US National Academy of Engineering. His interdisciplinary service activities have involved associate editor appointments with AUTOMATICA and the IEEE Transactions on Automatic Control, as well as guest editorial appointments for Journal of Process Control and the IFAC sponsored conference DYCOPS in 2010. In 2011, he was appointed Deputy Editor-in-Chief of IFAC PapersOnLine, an on-line archive of all peer-reviewed conference proceedings sponsored by the International Federation of Automatic Control (IFAC). In 2012, Kothare served as Chair of the CAST division of the AIChE. In 2012, he was elected Fellow of IEEE.