The School of Computing and Data Science (https://www.cds.hku.hk/) was established by the University of Hong Kong on 1 July 2024, comprising the Department of Computer Science and Department of Statistics and Actuarial Science.

Events for
Past Seminars and Events
August 26, 2020
  • Title: [CANCELLED] Informative Planning of Autonomous Robots for Spatiotemporal Environmental Monitoring

    Time: 10:00am 

    Venue: Online

    Speaker(s): Professor Lantao Liu, Indiana University

    Remark(s): 

    Zoom meeting link:
    https://hku.zoom.us/j/99484141050
    Meeting ID: 994 8414 1050

    Title: Informative Planning of Autonomous Robots for Spatiotemporal Environmental Monitoring
     
    Speaker: Professor Lantao Liu, Indiana University
     
    Abstract:
    Date: August 26, 2020 (Wednesday)
    Time: 10:00 am (HK Time) (GMT+8)
    Adaptive sampling and planning in robotic environmental monitoring are challenging when the target environmental process varies over space and time.  I will first discuss a Monte Carlo tree search method which enables the robot to not only well balance the environment exploration and exploitation in space, but also catch up to the environmental dynamics that are related to time. This is achieved by incorporating multi-objective optimization and a look-ahead model-predictive rewarding mechanism. The method produces optimized decision solutions for the robot based on its knowledge (estimation) of the environment model, leading to better adaptation to environmental dynamics. Then I will discuss robot decision-making in uncertain and unstructured environments, such as in the scenario when strong winds and water flows cause robot stochastic behaviors. We explore the time-varying stochasticity of robot motion and investigate robot states' reachability, based on which we develop an efficient iterative method that offers a good trade-off between solution optimality and time complexity.
     
    About the speaker:
     
    Lantao Liu is an Assistant Professor in the Luddy School of Informatics, Computing, and Engineering at Indiana University-Bloomington. He has been working on planning, learning, and coordination techniques for autonomous systems involving single or multiple robots with potential applications in environmental monitoring, surveillance and security, search and rescue, as well as smart transportation. Before joining Indiana University, he was a Research Associate in the Department of Computer Science at the University of Southern California during 2015 - 2017. He also worked as a Postdoctoral Fellow in the Robotics Institute at Carnegie Mellon University during 2013 - 2015. He received a Ph.D. from the Department of Computer Science and Engineering at Texas A&M University in 2013, and a Bachelor degree from the Department of Automatic Control at Beijing Institute of Technology in 2007. 
     
    All are welcome!
    Tel: 2859 2180

August 20, 2020
July 16, 2020
July 14, 2020
July 10, 2020
  • Title: Robust Decision Making in a Partially Observable World

    Time: 02:00pm 

    Venue: Online

    Speaker(s): Hanna Kurniawati, Australian National University

    Remark(s): 

    Zoom meeting link:
    https://hku.zoom.us/j/94650715947
    Meeting ID: 946 5071 5947

    Title: Robust Decision Making in a Partially Observable World
     
    Speaker: Hanna Kurniawati, Australian National University
     
     
    Date: July 10, 2020 (Friday)
    Time: 2:00 pm (HK Time) (GMT+8)
     
    Abstract:
     
    Robust robot operation must answer: What to do now, to receive good long-term returns, despite notRobust robot operation must answer: What to do now, to receive good long-term returns, despite notknowing the exact effect of its actions, despite various errors in sensors and sensing, and despitelimited information about the environment and itself. This problem is not new. Mathematically principledconcepts --called Partially Observable Markov Decision Processes (POMDPs)-- have been developedmore than five decades ago to address the problem mentioned above. However, such concepts arenotorious for their computational complexity, that they have often been considered impractical. I willpresent some of our effort in addressing the computational complexity issues of solving POMDPs, anddemonstrate that this decision making concept has now become practical (to some extent) for solvingvarious problems in robotics. I will end with a discussion on what this technology could mean inbridging the gap between sensing and acting in robotics, and between planning and learning ingeneral.
     
    About the speaker:
     
    Hanna Kurniawati is a Senior Lecturer with ANU and CS Futures Fellowship at the Research School ofHanna Kurniawati is a Senior Lecturer with ANU and CS Futures Fellowship at the Research School ofComputer Science, Australian National University (ANU). Prior to ANU, she was an academic at theUniversity of Queensland and a Research Scientist at the Singapore-MIT Alliance for Research andTechnology. She earned a PhD in Computer Science from National University of Singapore for work onrobot motion planning. Her current research focuses on the design and development of algorithms thatenable mathematically principled concepts for robust decision making to become practical tools inrobotics. Along with colleagues and students, she won a best paper award at ICAPS’15 and was afinalist of the best paper award at ICRA’15. She was also a keynote speaker at IROS’18.
     
    All are welcome!
    Tel: 2859 2180

July 02, 2020
June 30, 2020
June 19, 2020
  • Title: Robots Learning (Through) Interactions

    Time: 04:00pm 

    Venue: Online

    Speaker(s): Professor Jens Kober, Cognitive Robotics Department (CoR), Delft University of Technology

    Remark(s): 

    Date: June 19, 2020 (Friday)
    Time: 4:00 pm (HK Time) (GMT+8)

    Zoom link: https://hku.zoom.us/j/93201362975
    Meeting ID: 932 0136 2975

    Title: Robots Learning (Through) Interactions

     

    Speaker: Professor Jens Kober, Cognitive Robotics Department (CoR), Delft University of Technology

     

    Abstract:

    The acquisition and self-improvement of novel motor skills is among the most important problems in robotics. Reinforcement learning and imitation learning are two different but complimentary machine learning approaches commonly used for learning motor skills.

    I will discuss various learning techniques we developed that can handle complex interactions with the environment. Complexity arises from non-linear dynamics in general and contacts in particular, taking multiple reference frames into account, dealing with high-dimensional input data, interacting with humans, etc. A human teacher is always involved in the learning process, either directly (providing demonstrations) or indirectly (designing the optimization criterion), which raises the question: How to best make use of the interactions with the human teacher to render the learning process efficient and effective?

    All these concepts will be illustrated with benchmark tasks and real robot experiments ranging from fun (ball-in-a-cup) to more applied (unscrewing light bulbs).

    About the speaker:

     

    Jens Kober is an associate professor at the TU Delft, Netherlands. He worked as a postdoctoral scholar jointly at the CoR-Lab, Bielefeld University, Germany and at the Honda Research Institute Europe, Germany. He graduated in 2012 with a PhD Degree in Engineering from TU Darmstadt and the MPI for Intelligent Systems. For his research he received the annually awarded Georges Giralt PhD Award for the best PhD thesis in robotics in Europe, the 2018 IEEE RAS Early Academic Career Award, and has received an ERC Starting grant. His research interests include motor skill learning, (deep) reinforcement learning, imitation learning, interactive learning, and machine learning for control.

     

    All are welcome!
    Tel: 2859 2180

June 11, 2020
May 15, 2020



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香港大學計算機科學系
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