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First ACM International Conference on Web Search and Data Mining - WSDM 2008

SoftRank: Optimising Non-Smooth Rank Metrics

author:Michael Taylor, Microsoft Research, Cambridge, Microsoft Research
published: Feb. 25, 2008, recorded: February 2008, views: 127

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Slides

Slides
0:00	SoftRank Optimising Non-Smooth Rank Metrics
0:18	IR Metrics are Not Smooth: NDCG
3:28	Previous Proxy Training Objectives
6:48	SoftRank Approach
9:36	Rank Distribution
11:10	Pairwise Contest Approximation
14:39	Rank Distribution Recursion
17:04	Effect of Pairwise Contest Trick
17:49	SoftNDCG
19:58	Experiments
21:16	SoftRank Results
22:20	Generalization Study
23:24	Discount Study
24:30	Conclusions

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