2017-07-08 08:41 软件与微电子学院 国际合作处    (点击: )





题目:Advanced techniques for feature extraction and data analysis in

hyperspectral imaging



报告简介:Although hyperspectral imaging has been widely applied in a number of application areas such as remote sensing, precision agriculture, mining and surveillance, food/drink inspection, pharmaceutical, material, and security. One fundamental problem is feature extraction from the hypercube, which has severely constrained its applicability. In this talk, several key techniques for feature extraction in hyperspectral imaging are reported, including structured PCA, folded-PCA and singular spectrum analysis. Experimental results on several remote sensing datasets are presented to show the efficacy of these techniques.


题目:Changing Arctic sea ice: the emergence of a dominant Marginal Ice Zone

报告人:Phil (Byongjun) Hwang


报告简介:The rapid decline of Arctic sea ice during the past decades is a conspicuous indicator of climate change. This reduced sea ice cover is brining profound changes to the Arctic physical and bio-geo-chemical environments. Satellite observations show that the Marginal Ice Zone (MIZ), a region of low ice concentration area consisting of a relatively disperse collection of small ice floes, has grown. Model projections indicate a growth of the MIZ from 10% to 80% of the summer sea ice cover by 2050. With this emerging MIZ, surface ocean wave increases; sea ice breaks up into smaller floes; deformation of sea ice intensifies; air-ocean momentum transfer increases; upper ocean easily heats up by sun. Current climate models do not have proper parameterizations to describe MIZ processes, which makes it difficult to predict future Arctic sea ice and its cascading effects. In this talk, I present recent research activities on MIZ processes using satellite and autonomous observing technologies. These technologies provide better understanding of MIZ processes and provide the data to calibrate/validate MIZ-related parameterizations in the models.



Phil (Byongjun) Hwang英国苏格兰海洋科学协会海洋物理学家,1991年、1997年在韩国首尔汉阳大学获海洋科学学时和硕士学位,并于2008年获加拿大马尼托巴大学博士学位。他参与了原位微波辐射计和散射仪测量的研究以及海冰微波遥感的应用。他参加了涉及散射仪和辐射计测量的北极国际实验。研究兴趣包括高分辨率合成孔径雷达应用,海冰漂移和海冰质量平衡等。