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» Some extensions of score matching
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CSDA
2007
94views more  CSDA 2007»
13 years 4 months ago
Some extensions of score matching
Many probabilistic models are only defined up to a normalization constant. This makes maximum likelihood estimation of the model parameters very difficult. Typically, one then h...
Aapo Hyvärinen
NECO
2010
129views more  NECO 2010»
13 years 3 months ago
A Two-Layer Model of Natural Stimuli Estimated with Score Matching
We consider a hierarchical two-layer model of natural signals in which both layers are learned from the data. Estimation is accomplished by Score Matching, a recently proposed est...
Urs Köster, Aapo Hyvärinen
TCBB
2011
12 years 11 months ago
Graph Comparison by Log-Odds Score Matrices with Application to Protein Topology Analysis
A TOPS diagram is a simplified description of the topology of a protein using a graph where nodes are α-helices and β-strands, and edges correspond to chirality relations and p...
J. Rocha
SIGIR
2006
ACM
13 years 10 months ago
Semantic term matching in axiomatic approaches to information retrieval
A common limitation of many retrieval models, including the recently proposed axiomatic approaches, is that retrieval scores are solely based on exact (i.e., syntactic) matching o...
Hui Fang, ChengXiang Zhai
AVBPA
2005
Springer
320views Biometrics» more  AVBPA 2005»
13 years 10 months ago
A Principled Approach to Score Level Fusion in Multimodal Biometric Systems
A multimodal biometric system integrates information from multiple biometric sources to compensate for the limitations in performance of each individual biometric system. We propos...
Sarat C. Dass, Karthik Nandakumar, Anil K. Jain