Select a calendar:
Filter May Events by Event Type:
SUNMONTUEWEDTHUFRISAT
Events for May 15, 2015
-
MFD Commencement Reception
Fri, May 15, 2015 @ 12:15 PM - 02:30 PM
Mork Family Department of Chemical Engineering and Materials Science
Receptions & Special Events
You are cordially invited to attend 2015 Mork Family Department Commencement Reception
Graduating Students, Family, Faculty and Staff
May 15, 2015
12:15 P.M.
HED 116More Information: Invite.pdf
Location: Hedco Pertroleum and Chemical Engineering Building (HED) - 116
Audiences: Graduating Students, Family, Faculty and Staff
Contact: Jason Ordonez
-
NL Seminar- Exploring LDA: Parallel Inference and Model Selection
Fri, May 15, 2015 @ 03:00 PM - 04:00 PM
Information Sciences Institute
Conferences, Lectures, & Seminars
Speaker: Dehua Cheng, (USC/Melady)
Talk Title: Exploring LDA: Parallel Inference and Model Selection
Series: Natural Language Seminar
Abstract: Latent Dirichlet allocation (LDA) and its Bayesian nonparametric generalization hierarchical Dirichlet processes (HDP) have been proven successful in modeling large, complex, real-world domains. However, inference on LDA/HDP is challenging and it has received notable attention from the researchers. In this talk, we present two algorithmic advances for LDA/HDP inference by examining their mathematical properties. We will first present an effective parallel Gibbs sampling algorithm for LDA/HDP by exploring the equivalency between the Dirichlet-multinomial hierarchy and the Gamma-Poisson hierarchy. Secondly, we will show how to provably select the number of topics for LDA by studying the spectral space of its second order moments (bi-gram statistics).
Biography: Dehua Cheng is a third year Ph.D. student in the CS department at USC, advised by Professor Yan Liu. Prior to that, he received his B.S. degree in Mathematics and Physics from Tsinghua University, China. His research interests include randomized numerical algorithm in machine learning and parallel inference for probabilistic graphical model.
Host: Nima Pourdamghani and Kevin Knight
More Info: http://nlg.isi.edu/nl-seminar/
Location: Information Science Institute (ISI) - 6th Flr Conf Rm # 689, Marina Del Rey
Audiences: Everyone Is Invited
Contact: Peter Zamar
Event Link: http://nlg.isi.edu/nl-seminar/
