Additive group theory—A progress report

NUMERICAL ANALYSIS GROUP PROGRESS REPORT January 1994 – December 1995

2 Sparse Matrices ……………………………………………………………………………… 4 2.1 The direct solution of sparse unsymmetric linear sets of equations (I.S. Duff and J.K. Reid) …………………………………………………………………………… 4 2.2 The design and use of algorithms for permuting large entries to the diagonal 2.6 Element resequencing for use with a multiple front solver (J. A. Scott) ………… 10 2.7 Exploiting zeros on the diagonal in the direct s...

Ral 94 - 062 Numerical Analysis Group Progress Report

Group Sparse Additive Models

We consider the problem of sparse variable selection in nonparametric additive models, with the prior knowledge of the structure among the covariates to encourage those variables within a group to be selected jointly. Previous works either study the group sparsity in the parametric setting (e.g., group lasso), or address the problem in the nonparametric setting without exploiting the structural...

Progress Report

The goals for the first quarter in the timeline defined in the proposal were to run experiments on ESnet and ANI testbed to capture control-connection packets for file transfer applications, and to design new online flow detection algorithms. Both these activities were planned for the first proposed work item, which is to design new online flow detection algorithms because the Hybrid Network Tr...

Progress Report

Sand fields develop different patterns, such as sandbars, sand ridges, sand ripples, sand dunes, and river dunes. These vary in shape from crescent to ridge-like patterns. They are formed in areas such as deserts, lakes and seashores, where winds or fluid flows are strong and tend to blow from one direction or oscillate. There is a great deal of order in these patterns: perhaps a simple model c...