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【学术报告】An Accelerated Proximal Alternating Direction Method of Multipliers for Robust Fused Lasso

发布日期:2023-06-28    点击:


十大网投靠谱网站学术报告

An Accelerated Proximal Alternating Direction Method 

of Multipliers for Robust Fused Lasso

靳正芬

(河南科技大学  副教授)

报告时间:2023630日 星期五 上午10:00-11:00

报告地点:沙河校区E404


报告摘要:In the era of big data, much of the data is susceptible to noise with heavy-tailed distribution. Fused Lasso can effectively handle high dimensional sparse data with strong correlation between two adjacent variables under known Gaussian noise. However, it has poor robustness to non-Gaussian noise with heavy-tailed distribution. Robust fused Lasso with 𝑙1 norm loss function can overcome the drawback of fused Lasso when noise is heavy-tailed distribution. But the key challenge for solving this model is non-smoothness and its non-separability. Therefore, in this paper, we first deform the robust fused Lasso into an easily solvable form, which changes the three-block objective function to a two-block form. Then, we propose an accelerated proximal alternating direction method of multipliers (APADMM) with an additional update step, which is based on a new PADMM that changes the Lagrangian multiplier term update. Furthermore, we give the 𝑂(1/𝐾) nonergodic convergence rate analysis of the proposed APADMM. Finally, numerical results show that the proposed new PADMM and APADMM have better performance than other existing ADMM solvers.


报告人简介:靳正芬,河南科技大学,副教授。20215月至今,在信誉最好的大网投平台十大网投靠谱网站从事博士后研究工作,合作导师韩德仁教授。研究方向是最优化理论、方法及其应用、大规模稀疏与低秩优化、统计优化。主持1项国家自然科学基金青年项目和1项河南省自然科学基金青年项目,参与5项国家自然科学基金项目。在Numerical Linear Algebra with Applications, Journal of Scientific Computing, Journal of Computational and Applied MathematicsApplied Mathematical Modelling等国外著名期刊上发表论文10余篇。现为中国运筹学会数学规划分会青年理事,中国运筹学会宣传工作委员会委员,河南省运筹学会组织工作委员会委员。


邀请人:谢家新


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