Instructors/Speakers Prof. Xin CHEN Special Research Fellow School of Mathematical Sciences Shanghai Jiao Tong University China Abstract In this paper, we consider the homogenization problem for a non-symmetric L´evy-type operator in a medium with a periodic structure. Under a proper scaling of this operator, we establish the limit behavior of the rescaled operator as the scaling parameter tends to zero. This talk is based on a joint work with Zhen-qing Chen, Takashi Kumagai and Jian Wang. Biography Prof. Chen received his PhD at Warwick University, and is now a special research fellow (equal to associate professor) at Shanghai Jiao Tong University. His main research fields are stochastic process and stochastic analysis. Prof. Chen has published nearly 20 papers in top ...
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Instructors/Speakers Prof. Jian WANG Professor College of Mathematics and Informatics Fujian Normal University China Abstract In this talk we review some recent works on couplings of SDEs with Levy noises. As applications, we consider the corresponding ergodic properties in term of the total variation and the $W_1$-distance. Biography Prof. Jian WANG received his PhD from Beijing Normal University, and is now a full professor at Fujian Normal University. His main research fields are stochastic process and stochastic analysis. Prof. Wang has published more than 80 papers in top journals such as Journal of European Mathematical Society, Memoir of American Mathematical Society, Communication in Mathematical Physics, Journal of Functional Analysis and so on. |
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Instructors/Speakers Prof. Limin ZHANG Chair Professor of Geotechnical Engineering Director of Geotechnical Centrifuge Facility Associate Director of Great Smart Cities Institute Associate Head of Department of Civil and Environmental Engineering Hong Kong University of Science and Technology Hong Kong Abstract An extreme storm may trigger a large number of flood spots, landslides and debris flows in Hong Kong. The consequences can be catastrophic. To develop strategies to cope with geohazrads induced by extreme rainstorms, a good understanding of the generation and propagation of hazards during a storm is essential. HKUST is in the process of developing a “Digital Hong Kong” multi-hazard simulation platform to evaluate possible hazardous processes in critical rainstorms in the entire Hong Kong. The simulation framework is ... |
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Instructors/Speakers Dr. Wenyin LIU WIS Lab Guangdong University of Technology Abstract A web identity is an identifier that uniquely identifies and represents an entity in the Cyberspace. Web identity security focuses on accurate identity verification and prevention of identity impersonation, fraud, leakage, theft, etc. Nowadays, the increasing scale of the Web gives rise to the problems of “Password Fatigue”, "Phishing Attacks" and "Brute Force Password Attacks", and brings great challenges to the currently dominant password-based web identity authentication scheme. In this talk, we will first present the threats and challenges to Web identity security and then introduce our solutions and suggestions. In particular, we propose a new web identity authentication mechanism by introducing a module named “Trusted User Agent” in ... |
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Instructors/Speakers Dr. Boxing CHEN Machine Intelligence Lab DAMO Academy of Alibaba Group Abstract With the significant performance improvement of automatic speech recognition and machine translation, speech translation comes to the real life from the science fiction. There are two paradigms for speech translation: cascaded and end2end speech translation systems. Due to the size of the available training data, cascaded speech translation system still over-performs the end2end speech translation system. However, cascaded speech translation system also suffers the error propagation problem. ASR errors, punctuation restoration, language informality, and disfluency etc. are the main challenges for speech translation. We invest effort in all components of the cascaded speech translation system. We achieve improvement for each component in the pipeline, therefor result better ...
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Instructors/Speakers Prof. Jeffrey Y. CHENG Associate Professor of Civil Engineering School of Engineering University of Guam Guam Abstract The "smart water systems" have been introduced to China since 2010 summer in EXPO 2010, which could be the leading way to improve the urban water distribution problems. In the network age of "4G" going to be "5G", leveraging recent advances in technologies surrounding the Internet devices, urban water distribution systems are poised to transform water supplies management by enabling ubiquitous real-time sensing and control. This paper introduces the methodology of urban water distribution system data collection, database creation and management, GIS and BIM applications, EPA-NET hydraulic and water quality model creation, real-time sensing and control application. And combined them into a ... |
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Instructors/Speakers Prof. Daniel P. K. LUN Department of Electronic and Information Engineering Hong Kong Polytechnic University Abstract In 3D computer graphics, the depth map of a scene is a dataset that provides information about the distance of the surfaces of scene objects from a viewpoint. Nowadays, we can effectively estimate the depth map of a scene using different hardware or software techniques. It is particularly the case with the recent high-end mobile devices which are all equipped with multiple cameras. The depth map can be estimated using different triangulation methods based on the multiple images captured by the cameras. Once the depth map is obtained, the next question is what we can do with such additional information of the scene. ... |
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Instructors/Speakers Dr. Kohta ASANO Senior Researcher of Senior Researcher of Research Institute of Energy Frontier National Institute of Advanced Industrial Science and Technology (AIST) Japan Abstract Metal hydrides have a number of properties that may be utilized to promote the use of hydrogen as an energy carrier. Those with a high hydrogen permeability can be applied as membranes for hydrogen separation, while the optical changes occurring in metal thin films upon hydrogenation can be used for hydrogen sensing. Even better known is the fact that the high volumetric density of hydrogen makes metal hydrides an attractive option to store energy. The applicability of metal hydrides for storage applications depends on its affinity to hydrogen which determines the equilibrium pressure for ...
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Instructors/Speakers Prof. Huai-Jun LIN Associate Professor of Institute of Advanced Wear & Corrosion Resistance and Functional Materials Jinan University China Abstract MgH2 has been widely considered as a promising candidate for hydrogen storage because it stores 7.6 wt% of hydrogen, however thermodynamics and kinetics for hydrogen absorption and desorption are not well satisfied. Abundant efforts have been devoted to prepare nanostructured Mg-based materials with enhanced hydrogen storage. Although kinetics improvements could be well achieved, thermodynamics issues are remained in Mg-based hydrogen storage materials. We attempted to prepare novel Mg-based amorphous alloys for hydrogen storage applications. The results could be summarized as follows: (1) A hydrogen-induced glass-to-glass transition in Mg-Ce-Ni amorphous alloys with a storage capacity of 5 wt%-H is reported. The ... |
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