event thumbnail image
OPEN HOUSE on Multi-Task and Complex Outputs Learning
Pascal

Efficient max-margin Markov learning via conditional gradient and probabilistic inference

author: Juho Rousu, University of Helsinki

Description

We present a general and efficient optimisation methodology for for max-margin sructured classification tasks. The efficiency of the method relies on the interplay of several techiques: marginalization of the dual of the structured SVM, or max-margin Markov problem; partial decomposition via a gradient formulation; and finally tight coupling of a max-likelihood inference algorithm into the optimization algorithm, as opposed to using inference as a working set maintenance mechanism only.

You might be experiencing some problems with Your Video player.
Slides
0:02 Efficient Max-Margin Markov
0:33 rStructured Multilabel Classi cation
2:07 Hypergraph structure?
2:31 Hierarchical Multilabel Classi cation:
3:32 Classi cation on a DAG: Gene ontology prediction
4:51 The classi cation model
6:11 Max-margin Structured output learning
7:34 Optimization problem
8:58 Decomposable representations
10:25 Orthogonal features
12:34 Orthogonal features
13:44 Additive features
15:31 Loss functions
18:12 Hierarchical losses
20:23 Optimization problem
20:39 Marginalized problem
22:03 Marginalized problem
23:51 Size of the marginal dual problem
25:18 Decomposing the model
26:49 Conditional Gradient method
27:58 Conditional Gradient Ascent
28:11 Conditional Gradient Ascent
28:30 Conditional Gradient Ascent
28:40 Conditional Gradient Ascent
29:15 Conditional Gradient Ascent
29:20 Decomposing the model
30:48 Finding update directions eciently
31:32 Finding update directions eciently
33:04 Finding update directions eciently
34:17 Solving the inference problem
35:25 Conditional Gradient Ascent
35:45 Solving the inference problem
36:21 Experiments
37:44 Optimization eciency
38:40 Prediction accuracy: Levelwise F1
41:17 Scalability?
42:39 Conclusions
44:11 Future work and open problems

Lecture rating

People found this lecture:
Worth seeing
because it is:
 Valuable and informative
Well presented
Easily understandable
Acceptably recorded
You need to login to cast your vote.

Report a problem or upload files

If you have found a problem with this lecture or would like to send us extra material, articles, exercises, etc., please use our ticket system to describe your request and upload the data.
Enter your e-mail into the 'Cc' field, and we will keep you updated with your request's status.

Link this page

Would you like to put a link to this lecture on your homepage?
Go ahead! Copy the HTML snippet !

Write your own review or comment: