After spending about 5 minutes showing recent results onvideo segmentation (joint work with Adobe), I will describe somerecent works in my group in the area of dictionary learning and sparse coding.In particular I will present new models derived from information theory,new models dedicated to go beyond standard sparse coding applications andinto...
Creator:
Sapiro, Guillermo R. (University of Minnesota, Twin Cities)
Created:
2009-10-06
Contributed By:
University of Minnesota, Institute for Mathematics and its Applications.
We have recently shown how path integral simulations can bestreamlined by decomposing the potential into a sum of rapidlyvarying short-range and slowly varying long-range contributions.In this talk, I will describe an efficient way to perform thisdecomposition for systems with electrostatic interactions, andillustrate the method with an applicat...
Creator:
Manolopoulos, David E. (University of Oxford)
Created:
2009-01-12
Contributed By:
University of Minnesota, Institute for Mathematics and its Applications.
Descriptions of implicit solvent models like the Poisson-Boltzmannequation express the electrostatic potential as the solution of anelliptic PDE with delta function source terms. These equations areparticularly good fits with iterative solvers that use a fast N-bodysolver as a preconditioner. Also, modern architectures favor suchalgorithms due t...
Creator:
Skeel, Robert D. (Purdue University)
Created:
2008-12-11
Contributed By:
University of Minnesota, Institute for Mathematics and its Applications.
Data classification, where the goal is to divide data into predefined classes, is a fundamental problem in machine learning with many applications, including the classification of 3D sensory data. In this paper, we present a data classification method which can be applied to both semi-supervised and unsupervised learning tasks. The algorithm ...
Creator:
Rapinchuk, Ekaterina (Michigan State University)
Created:
2020-09-14
Contributed By:
University of Minnesota, Institute for Mathematics and its Applications.
In this talk I will introduce the back-and-forth method, a new algorithm to efficiently solve the optimal transportation problem for a general class of strictly convex transportation costs. Given two probability measures supported on a discrete grid with n points, the method computes the optimal map in O(n log(n)) operations using O(n) storage s...
Creator:
Jacobs, Matthew (University of California, Los Angeles)
Created:
2020-11-11
Contributed By:
University of Minnesota, Institute for Mathematics and its Applications.
In this talk, we present a simple and efficient method for rotating aspherical harmonic expansion. This is a well-studied problem, arisingin classical scattering theory, quantum mechanics and numericalanalysis, usually addressed through the explicit construction of theWigner rotation matrices. Existing fast algorithms, based onrecurrence relatio...
Creator:
Gimbutas, Zydrunas (New York University)
Created:
2010-08-04
Contributed By:
University of Minnesota, Institute for Mathematics and its Applications.
Discretizations of PDEs have traditionally relied on structured meshes. Requirements for geometric flexibility, both to conform to highly irregular geometries as in topographical and urban features as well as to achieve local refinement in critical areas, have led to an increased use of unstructured meshes, often in the form of polygonal-type el...
Creator:
Flyer, Natasha (National Center for Atmospheric Research)
Created:
2014-10-17
Contributed By:
University of Minnesota, Institute for Mathematics and its Applications.
A family stops for a photo during the Mount Sinai Hospital and Phillips Neighborhood clean-up, Minneapolis, Minnesota. Mount Sinai Hospital employees, members of the Auxilliary and the Board of Governors, volunteers and family members participated with the residents of the Phillips Minneapolis neighborhood in the 1st Partners in Pride neighborh...
Created:
1985-09-22
Contributed By:
University of Minnesota Libraries, Nathan and Theresa Berman Upper Midwest Jewish Archives.
A family stands outside the Mott Cash Bazaar. The store carried dry-goods, clothing, shoes, crockery, and groceries and was located in Mott, North Dakota.
Contributed By:
University of Minnesota Libraries, Nathan and Theresa Berman Upper Midwest Jewish Archives.
