Link to COG weekly seminars here (Google Sheets).
Title: The Complexity of Primal-Dual Fixed Point Methods for Ridge RegressionSpeaker: Prof. Ademir RibeiroAffiliation: Department of Mathematics - Federal University of ParanaLocation: Room 218 Huxley BuildingTime: 2:00pmAbstract. We study the ridge regression (L2 regularized least squares) problem and its dual, which is also a ridge regression problem. We observe that the optimality conditions can be... Read more »
Title: Are Targets for Renewable Portfolio Standards Too Low? - The Impact of Market Structure on Energy Policy? (joint work with Makoto Tanaka and Yihsu Chen)Speaker: Dr Afzal SiddiquiAffiliation: Department of Statistical Science - University College LondonLocation: Room 217 Huxley BuildingTime: 2:00pmAbstract. In order to limit climate change from greenhouse gas emissions, governments have introduced... Read more »
Title: A cycle-based formulation and valid inequalities for DC power transmission problems with switchingSpeaker: Prof. Jeff LinderothAffiliation: Departments of Industrial and Systems Engineering and Computer Sciences (by courtesy) - University of Wisconsin-MadisonLocation: LT 145 Huxley BuildingTime: 3:00pmAbstract. It is well-known that optimizing network topology by switching on and off transmission lines improves the efficiency of... Read more »
Title: A bilevel programming problem occurring in smart gridsSpeaker: Prof. Leo LibertiAffiliation: Ecole Polytechnique ParisLocation: CPSE seminar room (C615 Roderic Hill)Time: 11:00amAbstract. A key property to define a power grid "smart" is its real-time, fine-grained monitoring capabilities. For this reason, a variety of monitoring equipment must be installed on the grid. We look at the... Read more »
Title: Computational Progress in Linear and Mixed Integer ProgrammingSpeaker: Dr. Robert BixbyAffiliation: GurobiLocation: CPSE seminar room (C615 Roderic Hill)Time: 11:00amAbstract. We will look at the progress in linear and mixed-integer programming software over the last 25 years. As a result of this progress, modern linear programming codes are now capable of robustly and efficiently solving... Read more »
Title: Estimating variance matricesSpeaker: Prof. Karim Abadir Affiliation: Imperial College Business SchoolLocation: Room 218 Huxley BuildingTime: 2:00pmAbstract. This talk introduces a new method for estimating variance matrices. Starting from the orthogonal decomposition of the sample variance matrix, we exploit the fact that orthogonal matrices are never ill-conditioned and therefore focus on improving the estimation... Read more »
Title: A two-phase proximal augmented Lagrangian method for large scale convex composite quadratic programmingSpeaker: Prof. Kim Chuan TohAffiliation: Department of Mathematics - National University of SingaporeLocation: CPSE seminar room (C615 Roderic Hill)Time: 11:00amAbstract. We consider an important class of high dimensional convex composite quadratic optimization problems with large numbers of linear equality and inequality constraints.... Read more »
Title: Generating structured music with local search and machine learningSpeaker: Dr. Dorien HerremansAffiliation: School of Electronic Engineering and Computer Science - Queen Mary UniversityLocation: LT 144 Huxley BuildingTime: 3:30pmAbstract. Many state of the art music generation/improvisation systems generate music that sounds good on a note-to-note level. However, these compositions often lack long term structure or... Read more »
Title: Families of Convex and Non-Convex Composite Optimization Problems for Signal Processing and Computer VisionSpeaker: Dr. Stefanos ZafeiriouAffiliation: Department of Computing - Imperial College LondonLocation: Room 217 - 218 Huxley BuildingTime: 3:00pmAbstract. About the speaker. Stefanos Zafeiriou is a Senior Lecturer (equivalent to Associate Professor) in Pattern Recognition/Statistical Machine Learning for Computer Vision in the... Read more »
Title: Rescaled coordinate descent methods for Linear ProgrammingSpeaker: Dr. Giacomo ZambelliAffiliation: Department of Management - London School of Economics and Political ScienceLocation: SALC 10 Sherfield Building Time: 4:00pmAbstract. Simple coordinate descent methods such as von Neumann’s algorithm or Perceptron, both developed in the 50s, can be used to solve linear programming feasibility problems. Their convergence... Read more »
