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» Distance Approximating Trees: Complexity and Algorithms
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JMLR
2010
118views more  JMLR 2010»
13 years 2 months ago
Exploiting Within-Clique Factorizations in Junction-Tree Algorithms
It is probably fair to say that exact inference in graphical models is considered a solved problem, at least regarding its computational complexity: it is exponential in the treew...
Julian John McAuley, Tibério S. Caetano
TNN
2010
216views Management» more  TNN 2010»
13 years 2 months ago
Simplifying mixture models through function approximation
Finite mixture model is a powerful tool in many statistical learning problems. In this paper, we propose a general, structure-preserving approach to reduce its model complexity, w...
Kai Zhang, James T. Kwok
STOC
2003
ACM
171views Algorithms» more  STOC 2003»
14 years 7 months ago
Primal-dual meets local search: approximating MST's with nonuniform degree bounds
We present a new bicriteria approximation algorithm for the degree-bounded minimum-cost spanning tree problem: Given an undirected graph with nonnegative edge weights and degree b...
Jochen Könemann, R. Ravi
ICANNGA
2007
Springer
100views Algorithms» more  ICANNGA 2007»
13 years 11 months ago
Softening Splits in Decision Trees Using Simulated Annealing
Predictions computed by a classification tree are usually constant on axis-parallel hyperrectangles corresponding to the leaves and have strict jumps on their boundaries. The densi...
Jakub Dvorák, Petr Savický
DEXAW
2006
IEEE
111views Database» more  DEXAW 2006»
14 years 1 months ago
Finding Syntactic Similarities Between XML Documents
Detecting structural similarities between XML documents has been the subject of several recent work, and the proposed algorithms mostly use tree edit distance between the correspo...
Davood Rafiei, Daniel L. Moise, Dabo Sun