各位老师：

您好！实验室邀请了伦敦学院大学的李兆平教授来讲座，欢迎感兴趣的老师和同学参加。讲座信息如下：

报告人：Zhaoping Li(李兆平)（伦敦学院大学和清华大学计算神经科学教授）

报告题目：Human wavelength discrimination of  monochromatic light explained by optimal wavelength decoding

报告时间： 10:00 AM, 19 July, 2012  (Thursday)

报告地点：北京师范大学脑成像中心3层大会议室

内容摘要：In wavelength discrimination task,  the discrimination threshold in humans is a “w” shaped function of the  wavelength of the light. The observers can easily confuse an input color change  with an input intensity change when monochromatic lights are the inputs. This  confusion reduces human ability in hue discrimination when observers do not have  the full knowledge of input intensities. An analytical framework has been  proposed in this talk and the dependence of the discrimination threshold on the  input wavelength was explained. The talk also tackled how sensitively the  threshold depends on the relative densities of the three types of cones in the  retina (and in particular predicts discriminations in dichromate). The  mathematical formulation and solution can be applied to general problems of  sensory discrimination when there is a perceptual confound from other sensory  feature dimensions.

报告人简介：

Prof Li received her B.S. in Physics  in 1984 from Fudan University, Shanghai, and Ph.D. in Physics in 1989 from  California Institute of Technology. Then she was a postdoctoral researcher in  Fermi National Laboratory in Batavia, Illinois USA, Institute for Advanced Study  in Princeton New Jersey, USA, and Rockefeller University in New York USA. She  was a faculty member in Computer Science in Hong Kong University of Science and  Technology, and was a visiting scientist at various academic institutions. In  1998, she helped to found the Gatsby Computational Neuroscience Unit in  University College London. Currently, she is a Professor of computational  neuroscience in the Department of Computer Science in University College London.  Her research experience throughout the years ranges from areas in high energy  physics to neurophysiology and marine biology, with most experience in  understanding the brain functions in vision, olfaction, and in nonlinear neural  dynamics. In late 90s and early 2000s, she proposed a theory (which is being  extensively tested) that the primary visual cortex in the primate brain creates  a saliency map to automatically attract visual attention to salient visual  locations.

    此致

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2012年7月16日