Search Results for author: Srikanta Tirthapura

Found 7 papers, 4 papers with code

DriftSurf: A Risk-competitive Learning Algorithm under Concept Drift

no code implementations13 Mar 2020 Ashraf Tahmasbi, Ellango Jothimurugesan, Srikanta Tirthapura, Phillip B. Gibbons

The advantage of our approach is that we can use aggressive drift detection in the stable state to achieve a high detection rate, but mitigate the false positive rate of standalone drift detection via a reactive state that reacts quickly to true drifts while eliminating most false positives.

Random Sampling for Group-By Queries

1 code implementation5 Sep 2019 Trong Duc Nguyen, Ming-Hung Shih, Sai Sree Parvathaneni, Bojian Xu, Divesh Srivastava, Srikanta Tirthapura

We consider random sampling for answering the ubiquitous class of group-by queries, which first group data according to one or more attributes, and then aggregate within each group after filtering through a predicate.

Databases Data Structures and Algorithms

FLEET: Butterfly Estimation from a Bipartite Graph Stream

1 code implementation8 Dec 2018 Seyed-Vahid Sanei-Mehri, Yu Zhang, Ahmet Erdem Sariyuce, Srikanta Tirthapura

We consider space-efficient single-pass estimation of the number of butterflies, a fundamental bipartite graph motif, from a massive bipartite graph stream where each edge represents a connection between entities in two different partitions.

Data Structures and Algorithms

Variance-Reduced Stochastic Gradient Descent on Streaming Data

no code implementations NeurIPS 2018 Ellango Jothimurugesan, Ashraf Tahmasbi, Phillip Gibbons, Srikanta Tirthapura

We present an algorithm STRSAGA for efficiently maintaining a machine learning model over data points that arrive over time, quickly updating the model as new training data is observed.

Enumerating Top-k Quasi-Cliques

2 code implementations28 Aug 2018 Seyed-Vahid Sanei-Mehri, Apurba Das, Srikanta Tirthapura

Quasi-cliques are dense incomplete subgraphs of a graph that generalize the notion of cliques.

Data Structures and Algorithms

Butterfly Counting in Bipartite Networks

2 code implementations31 Dec 2017 Seyed-Vahid Sanei-Mehri, Ahmet Erdem Sariyuce, Srikanta Tirthapura

We consider the problem of counting motifs in bipartite affiliation networks, such as author-paper, user-product, and actor-movie relations.

Discrete Mathematics

Learning Graphical Models from a Distributed Stream

no code implementations5 Oct 2017 Yu Zhang, Srikanta Tirthapura, Graham Cormode

We study Bayesian networks, the workhorse of graphical models, and present a communication-efficient method for continuously learning and maintaining a Bayesian network model over data that is arriving as a distributed stream partitioned across multiple processors.

Management

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