應(yīng)yl7703永利官網(wǎng)黃玉梅教授的邀請,浙江大學(xué)黃正達教授、香港大學(xué)陳瑋琪教授和香港中文大學(xué)曾鐵勇教授將于4月19日在線舉辦專題學(xué)術(shù)報告。
報告題目: Sparse Probabilistic Boolean Networks
時 間: 2022年4月19日 下午15:00
騰訊會議號:625157473
報告摘要:
Boolean Networks (BNs) and their extensions Probabilistic Boolean Networks (PBNs) are useful models for studying genetic regulatory interactions and many other real-world problems. For the purpose of network inference and system synthesis, one has to construct such a network. It is a challenging problem, because there may be many networks or no network having the required properties. The construction of PBNs from observed data sets is an interesting problem of huge size. In this talk, we shall propose some construction methods. Numerical examples will be given to demonstrate the effectiveness of the proposed method.
報告人簡介
程瑋琪,香港大學(xué)教授、博導(dǎo)。1991年畢業(yè)于香港大學(xué),獲學(xué)士學(xué)位,1994年畢業(yè)于香港大學(xué),獲碩士學(xué)位,1998年畢業(yè)于香港中文大學(xué),獲博士學(xué)位。1999至2000年在英國劍橋大學(xué)進行博士后研究工作,2000至2001年在英國南安普頓大學(xué)擔(dān)任講師。曾任香港大學(xué)數(shù)學(xué)系系主任。目前擔(dān)任Enterprise Information Systems副主編,East Asian Journal on Applied Mathematics副主編,Journal of Applied and Computational Mathematics副主編,Computational and Mathematical Methods in Medicine副主編。
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報告題目: On Two Block Methods for Solving Linear Least-Squares Problems
時 間: 2022年4月19日 下午16:00
騰訊會議號:625157473
報告摘要:
A fast block coordinate descent method and a randomized double block Kaczmarz method for solving linear least-squares problems are proposed. The first one is based on a greedy criterion of the column selection used at each iteration, and the second one is a kind of the extended block Kaczmarz methods. The convergence and error estimates are obtained. Numerical experiments show the effectiveness of these two approaches, does not matter whether the coefficient matrix is of full column rank or not.
報告人簡介
黃正達,浙江省臨海市人,1992年于杭州大學(xué)數(shù)學(xué)系獲計算數(shù)學(xué)博士學(xué)位,現(xiàn)為浙江大學(xué)數(shù)學(xué)科學(xué)學(xué)院教授、博士生導(dǎo)師,浙江省數(shù)學(xué)會理事。在Numer. Linear Algebra Appl., BIT Numer. Math., Numer. Algor.等國際重要期刊發(fā)表學(xué)術(shù)論文四十余篇,作為主要參與人完成一項國家自然科學(xué)基金重點項目,主持完成多項國家自然科學(xué)基金面上項目、浙江省自然科學(xué)基金面上項目,現(xiàn)主持一項國家自然科學(xué)基金面上項目。
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報告題目: Blind Image Deblurring: What is the Next Step?
時 間: 2022年4月19日 下午17:00
騰訊會議號:625157473
報告摘要:
Blind image deblurring is a challenging task in imaging science where we need to estimate the latent image and blur kernel simultaneously. To get a stable and reasonable deblurred image, proper prior knowledge of the latent image and the blur kernel is urgently required. In this talk, we address several of our recent attempts related to image deblurring. Indeed, different from the recent works on the statistical observations of the difference between the blurred image and the clean one, we first report the surface-aware strategy arising from the intrinsic geometrical consideration. This approach facilitates the blur kernel estimation due to the preserved sharp edges in the intermediate latent image. Extensive experiments demonstrate that our method outperforms the state-of-the-art methods on deblurring the text and natural images. Moreover, we discuss the Quaternion-based method for color image restoration. After that, we extend the quaternion approach for blind image deblurring.
報告人簡介
曾鐵勇,香港中文大學(xué)教授、博導(dǎo)。香港中文大學(xué)數(shù)學(xué)人工智能中心主任,香港數(shù)學(xué)會理事會成員,2000年本科畢業(yè)于北京大學(xué),2004年法國綜合理工大學(xué)(Ecole Polytechnique, Palaiseau, France)獲碩士學(xué)位,2007年巴黎第十三大學(xué)獲得博士學(xué)位。2007-2008年在法國數(shù)學(xué)和應(yīng)用研究中心從事博士后研究;2008入職香港浸會大學(xué),先后任助理教授、副教授;2018年入職香港中文大學(xué),先后任副教授、教授。主要研究領(lǐng)域包括優(yōu)化理論、圖像處理、反問題、統(tǒng)計/機器學(xué)習(xí)、科學(xué)計算等。在優(yōu)化、圖像處理、反問題的國際一流雜志SIAM Journal on Imaging Sciences, SIAM Journal on Scientific Computing, International Journal of Computer Vision, Journal of Scientific Computing,IEEE Transactions on Image Processing,Pattern Recognition,Journal of Mathematical Imaging and Vision,Inverse Problems & Imaging等發(fā)表過80余篇SCI論文,google學(xué)術(shù)引用兩千二百余次。
甘肅應(yīng)用數(shù)學(xué)中心
甘肅省高校應(yīng)用數(shù)學(xué)與復(fù)雜系統(tǒng)省級重點實驗室
yl7703永利官網(wǎng)
萃英學(xué)院
2022年4月19日