西南交通大学
“创源”大讲堂研究生
学术讲座
报告题目：Visualization and Analysis of Large Scientific Data
报告人：海德堡科学与人文学院院士、德国斯图加特大学Thomas Ertl教授
报告时间：2019年07月24日 15:30-16:30
报告地点：西南交通大学犀浦校区9号楼9431
主持人：李天瑞 教授
摘要：As size and complexity of data sets resulting from simulations and sensors continue to grow, more elaborate techniques for their interactive analysis and visualization are being developed. This talk presents some of the recent contributions of the VISUS group at the University of Stuttgart focusing on dynamic volumes, multiphase flows, and particle data sets. For volumes we exploit similarity between time steps to select the most important characteristic temporal features, while still allowing exploration, and we develop adaptive algorithms for maintaining interactive frame rates by balancing quality and sampling errors. By direct multi-phase flow simulation, breakup and coalescence of droplets are studied which pose many visualization challenges like coupling the spatial representation with space-time diagrams showing the topological evolution or tracking droplet dynamics over time. In porous media, the behavior and distribution of bubbles influence physical properties of the material. We present an analysis pipeline which groups extracted bubbles and surrounding structures according to their similarity and clusters them, allowing visual comparison after registration. For large particle data sets of more than trillions of particles and for dynamic molecular trajectories we investigate in-situ approaches based on raytracing on CPUs. We conclude with our first attempts to learn interesting features in 3D time series and performance characteristics of visual computing systems.
主讲人简介：Thomas Ertl received a MSc in computer science from the University of Colorado at Boulder and a PhD in theoretical astrophysics from the University of Tübingen. Since 1999 he is a full professor of computer science at the University of Stuttgart in the Visualization and Interactive Systems Institute (VIS) and since 2007 he is a co-director of the Visualization Research Center (VISUS). From 2015-2018 he served as Vice President of Research of the University of Stuttgart and since 2019 he is the spokesperson of the SimTech Cluster of Excellence. His research interests include visualization, computer graphics and human computer interaction in general with a focus on volume rendering, flow and particle visualization, parallel and hardware accelerated rendering, large datasets and interactive exploration, visual analytics of text collections and social media with applications to geographic information and digital humanities. Thomas Ertl served on numerous program committees and as a papers co-chair for most conferences in the field. From 2007-2010 he was Editor-in-Chief of the IEEE Transactions on Visualization and Graphics (TVCG) and in 2011/2012 he served as Chairman of the Eurographics Association. He received the Outstanding Technical Contribution Award and the Distinguished Career Award of the Eurographics Association as well as the Technical Achievement Award of the IEEE Visualization and Graphics Technical Committee. In 2007 he was elected as a Member of the Heidelberg Academy of Sciences and Humanities. He received Honorary Doctorates from the Vienna University of Technology in 2011 and from the University of Magdeburg in 2014.
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主办单位：研究生院
承办单位：信息科学与技术学院
2019年7月23日
