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home · events · bactac · 2006-2007 · 
 

BACTAC - Bijral

 
11/7/2006
3:30pm-4:30pm
ECOT 831

Generative Models for Spectral Clustering on a Hypershere
Avleen S. Bijral Jr.
Master's Candidate

Many machine learning applications involve data, that can be analyzed as unit vectors on a d-dimensional Hypersphere, or equivalently are directional in nature. Spectral clustering techniques generate embeddings that constitute an example of directional data and can result in different topologies on a Hypersphere (depending on the original topology). Other examples of directional data includes text and some sub-domains of bioinformatics. For example the Watson and von Mises Fisher distributions for directional data presents a tractable form. In this talk I will be talking about generative models for these distributions and an EM algorithm that generates posterior cluster probabilities for points.


BACTAC, the Beverage And Chips Tuesday Afternoon Colloquium, is a weekly forum run by graduate students. The goal is provide an informal setting in which anyone can (basically) present anything. In the past, we have had practice talks for conferences and job interviews, research reports, juggle lessons (!), student representative reports, internship discussions, an introduction to ergonomics, and "pay attention to this when you are going to look for job" discussions.

BACTAC is meant to be an informal and social event to promote the interaction among graduate students. BACTAC is typically held every Tuesday, at 3:30pm, in room ECOT 831. Free munchies and drinks are provided.

Please email Caleb Phillips for more information or if you want to be a speaker.

 
See also:
Department of Computer Science
College of Engineering and Applied Science
University of Colorado Boulder
Boulder, CO 80309-0430 USA
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