Search Results for author: San Gultekin

Found 9 papers, 1 papers with code

Nonlinear Kalman Filtering with Reparametrization Gradients

1 code implementation8 Mar 2023 San Gultekin, Brendan Kitts, Aaron Flores, John Paisley

The widely used parametric approximation is based on a jointly Gaussian assumption of the state-space model, which is in turn equivalent to minimizing an approximation to the Kullback-Leibler divergence.

An Efficient Deep Distribution Network for Bid Shading in First-Price Auctions

no code implementations12 Jul 2021 Tian Zhou, Hao He, Shengjun Pan, Niklas Karlsson, Bharatbhushan Shetty, Brendan Kitts, Djordje Gligorijevic, San Gultekin, Tingyu Mao, Junwei Pan, Jianlong Zhang, Aaron Flores

Since 2019, most ad exchanges and sell-side platforms (SSPs), in the online advertising industry, shifted from second to first price auctions.

Bid Shading by Win-Rate Estimation and Surplus Maximization

no code implementations19 Sep 2020 Shengjun Pan, Brendan Kitts, Tian Zhou, Hao He, Bharatbhushan Shetty, Aaron Flores, Djordje Gligorijevic, Junwei Pan, Tingyu Mao, San Gultekin, Jianlong Zhang

We found that bid shading, in general, can deliver significant value to advertisers, reducing price per impression to about 55% of the unshaded cost.

Attribute

Risk Bounds for Low Cost Bipartite Ranking

no code implementations2 Dec 2019 San Gultekin, John Paisley

Bipartite ranking is an important supervised learning problem; however, unlike regression or classification, it has a quadratic dependence on the number of samples.

Generalization Bounds

MBA: Mini-Batch AUC Optimization

no code implementations29 May 2018 San Gultekin, Avishek Saha, Adwait Ratnaparkhi, John Paisley

Area under the receiver operating characteristics curve (AUC) is an important metric for a wide range of signal processing and machine learning problems, and scalable methods for optimizing AUC have recently been proposed.

Online Forecasting Matrix Factorization

no code implementations23 Dec 2017 San Gultekin, John Paisley

In this paper the problem of forecasting high dimensional time series is considered.

Time Series Time Series Analysis

Nonlinear Kalman Filtering with Divergence Minimization

no code implementations1 May 2017 San Gultekin, John Paisley

We consider the nonlinear Kalman filtering problem using Kullback-Leibler (KL) and $\alpha$-divergence measures as optimization criteria.

Stochastic Annealing for Variational Inference

no code implementations25 May 2015 San Gultekin, Aonan Zhang, John Paisley

We empirically evaluate a stochastic annealing strategy for Bayesian posterior optimization with variational inference.

Variational Inference

A Collaborative Kalman Filter for Time-Evolving Dyadic Processes

no code implementations22 Jan 2015 San Gultekin, John Paisley

Using the matrix factorization approach to collaborative filtering, the CKF accounts for time evolution by modeling each low-dimensional latent embedding as a multidimensional Brownian motion.

Collaborative Filtering

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