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SIAMAM
2008
80views more  SIAMAM 2008»
13 years 6 months ago
The Factorization Method for Electrical Impedance Tomography in the Half-Space
We consider the inverse problem of electrical impedance tomography in a conducting half space, given electrostatic measurements on its boundary, i.e., a hyperplane. We first provid...
Martin Hanke, Birgit Schappel
SIAMMAX
2010
145views more  SIAMMAX 2010»
13 years 27 days ago
Adaptive First-Order Methods for General Sparse Inverse Covariance Selection
In this paper, we consider estimating sparse inverse covariance of a Gaussian graphical model whose conditional independence is assumed to be partially known. Similarly as in [5],...
Zhaosong Lu
PRL
2010
209views more  PRL 2010»
13 years 27 days ago
Efficient update of the covariance matrix inverse in iterated linear discriminant analysis
For fast classification under real-time constraints, as required in many imagebased pattern recognition applications, linear discriminant functions are a good choice. Linear discr...
Jan Salmen, Marc Schlipsing, Christian Igel
COCOON
2005
Springer
13 years 11 months ago
Some New Results on Inverse Sorting Problems
Abstract. In this paper, we consider two types of inverse sorting problems. The first type is an inverse sorting problem under weighted Hamming distance with bound constraints, wh...
Xiaoguang Yang, Jianzhong Zhang 0001
CIKM
2009
Springer
13 years 10 months ago
Improving binary classification on text problems using differential word features
We describe an efficient technique to weigh word-based features in binary classification tasks and show that it significantly improves classification accuracy on a range of proble...
Justin Martineau, Tim Finin, Anupam Joshi, Shamit ...