Search Results for author: Sougata Chaudhuri

Found 10 papers, 0 papers with code

Online Learning to Rank with Top-k Feedback

no code implementations23 Aug 2016 Sougata Chaudhuri, Ambuj Tewari

We consider two settings of online learning to rank where feedback is restricted to top ranked items.

Learning-To-Rank

Phased Exploration with Greedy Exploitation in Stochastic Combinatorial Partial Monitoring Games

no code implementations NeurIPS 2016 Sougata Chaudhuri, Ambuj Tewari

The implementation of their algorithm depends on two separate offline oracles and the distribution dependent regret additionally requires existence of a unique optimal action for the learner.

Generalization error bounds for learning to rank: Does the length of document lists matter?

no code implementations6 Mar 2016 Ambuj Tewari, Sougata Chaudhuri

We consider the generalization ability of algorithms for learning to rank at a query level, a problem also called subset ranking.

Learning-To-Rank

Online Learning to Rank with Feedback at the Top

no code implementations6 Mar 2016 Sougata Chaudhuri, Ambuj Tewari

We consider an online learning to rank setting in which, at each round, an oblivious adversary generates a list of $m$ documents, pertaining to a query, and the learner produces scores to rank the documents.

Learning-To-Rank

Personalized Advertisement Recommendation: A Ranking Approach to Address the Ubiquitous Click Sparsity Problem

no code implementations6 Mar 2016 Sougata Chaudhuri, Georgios Theocharous, Mohammad Ghavamzadeh

We study the problem of personalized advertisement recommendation (PAR), which consist of a user visiting a system (website) and the system displaying one of $K$ ads to the user.

Handling Class Imbalance in Link Prediction using Learning to Rank Techniques

no code implementations13 Nov 2015 Bopeng Li, Sougata Chaudhuri, Ambuj Tewari

We consider the link prediction problem in a partially observed network, where the objective is to make predictions in the unobserved portion of the network.

Binary Classification Learning-To-Rank +1

Perceptron like Algorithms for Online Learning to Rank

no code implementations4 Aug 2015 Sougata Chaudhuri, Ambuj Tewari

We show that, if there exists a perfect oracle ranker which can correctly rank each instance in an online sequence of ranking data, with some margin, the cumulative loss of perceptron algorithm on that sequence is bounded by a constant, irrespective of the length of the sequence.

General Classification Information Retrieval +2

Online Ranking with Top-1 Feedback

no code implementations5 Oct 2014 Sougata Chaudhuri, Ambuj Tewari

We consider a setting where a system learns to rank a fixed set of $m$ items.

On Lipschitz Continuity and Smoothness of Loss Functions in Learning to Rank

no code implementations3 May 2014 Ambuj Tewari, Sougata Chaudhuri

In binary classification and regression problems, it is well understood that Lipschitz continuity and smoothness of the loss function play key roles in governing generalization error bounds for empirical risk minimization algorithms.

Binary Classification Learning-To-Rank

Perceptron-like Algorithms and Generalization Bounds for Learning to Rank

no code implementations3 May 2014 Sougata Chaudhuri, Ambuj Tewari

En route to developing the online algorithm and generalization bound, we propose a novel family of listwise large margin ranking surrogates.

Generalization Bounds Learning-To-Rank +1

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