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ICML
2010
IEEE
13 years 7 months ago
Spherical Topic Models
We introduce the Spherical Admixture Model (SAM), a Bayesian topic model for arbitrary 2 normalized data. SAM maintains the same hierarchical structure as Latent Dirichlet Allocat...
Joseph Reisinger, Austin Waters, Bryan Silverthorn...
ICMCS
2005
IEEE
137views Multimedia» more  ICMCS 2005»
14 years 1 months ago
Modeling Dynamic Textures Using Subspace Mixtures
In this paper, we aim at modeling video sequences that exhibit temporal appearance variation. The dynamic texture model proposed in [6] is effective to model simple dynamic scene...
Che-Bin Liu, Ruei-Sung Lin, Narendra Ahuja
SP
2002
IEEE
200views Security Privacy» more  SP 2002»
13 years 7 months ago
Design of a Role-Based Trust-Management Framework
We introduce the RT framework, a family of Rolebased Trust-management languages for representing policies and credentials in distributed authorization. RT combines the strengths o...
Ninghui Li, John C. Mitchell, William H. Winsborou...
IJCAI
2003
13 years 8 months ago
Covariant Policy Search
We investigate the problem of non-covariant behavior of policy gradient reinforcement learning algorithms. The policy gradient approach is amenable to analysis by information geom...
J. Andrew Bagnell, Jeff G. Schneider
NIPS
2000
13 years 8 months ago
Automatic Choice of Dimensionality for PCA
A central issue in principal component analysis (PCA) is choosing the number of principal components to be retained. By interpreting PCA as density estimation, this paper shows ho...
Thomas P. Minka