Search Results for author: Gary Cheng

Found 12 papers, 4 papers with code

Causal Inference out of Control: Estimating the Steerability of Consumption

no code implementations10 Feb 2023 Gary Cheng, Moritz Hardt, Celestine Mendler-Dünner

Regulators and academics are increasingly interested in the causal effect that algorithmic actions of a digital platform have on consumption.

Causal Inference Econometrics

Private optimization in the interpolation regime: faster rates and hardness results

no code implementations31 Oct 2022 Hilal Asi, Karan Chadha, Gary Cheng, John Duchi

In non-private stochastic convex optimization, stochastic gradient methods converge much faster on interpolation problems -- problems where there exists a solution that simultaneously minimizes all of the sample losses -- than on non-interpolating ones; we show that generally similar improvements are impossible in the private setting.

PV-RCNN++: Semantical Point-Voxel Feature Interaction for 3D Object Detection

no code implementations29 Aug 2022 Peng Wu, Lipeng Gu, Xuefeng Yan, Haoran Xie, Fu Lee Wang, Gary Cheng, Mingqiang Wei

Such a module will guide our PV-RCNN++ to integrate more object-related point-wise and voxel-wise features in the pivotal areas.

3D Object Detection Novel Object Detection +3

Semi-MoreGAN: A New Semi-supervised Generative Adversarial Network for Mixture of Rain Removal

1 code implementation28 Apr 2022 Yiyang Shen, Yongzhen Wang, Mingqiang Wei, Honghua Chen, Haoran Xie, Gary Cheng, Fu Lee Wang

Rain is one of the most common weather which can completely degrade the image quality and interfere with the performance of many computer vision tasks, especially under heavy rain conditions.

Depth Estimation Depth Prediction +2

Approximate Function Evaluation via Multi-Armed Bandits

no code implementations18 Mar 2022 Tavor Z. Baharav, Gary Cheng, Mert Pilanci, David Tse

We design an instance-adaptive algorithm that learns to sample according to the importance of each coordinate, and with probability at least $1-\delta$ returns an $\epsilon$ accurate estimate of $f(\boldsymbol{\mu})$.

Multi-Armed Bandits

When A Conventional Filter Meets Deep Learning: Basis Composition Learning on Image Filters

1 code implementation1 Mar 2022 Fu Lee Wang, Yidan Feng, Haoran Xie, Gary Cheng, Mingqiang Wei

Image filters are fast, lightweight and effective, which make these conventional wisdoms preferable as basic tools in vision tasks.

Denoising Rain Removal

Federated Asymptotics: a model to compare federated learning algorithms

no code implementations16 Aug 2021 Gary Cheng, Karan Chadha, John Duchi

We propose an asymptotic framework to analyze the performance of (personalized) federated learning algorithms.

Meta-Learning Personalized Federated Learning

Accelerated, Optimal, and Parallel: Some Results on Model-Based Stochastic Optimization

no code implementations7 Jan 2021 Karan Chadha, Gary Cheng, John C. Duchi

We extend the Approximate-Proximal Point (aProx) family of model-based methods for solving stochastic convex optimization problems, including stochastic subgradient, proximal point, and bundle methods, to the minibatch and accelerated setting.

Stochastic Optimization

Minibatch Stochastic Approximate Proximal Point Methods

no code implementations NeurIPS 2020 Hilal Asi, Karan Chadha, Gary Cheng, John C. Duchi

In contrast to standard stochastic gradient methods, these methods may have linear speedup in the minibatch setting even for non-smooth functions.

Handling Collocations in Hierarchical Latent Tree Analysis for Topic Modeling

no code implementations10 Jul 2020 Leonard K. M. Poon, Nevin L. Zhang, Haoran Xie, Gary Cheng

Topic modeling has been one of the most active research areas in machine learning in recent years.

Greedy Frank-Wolfe Algorithm for Exemplar Selection

2 code implementations6 Nov 2018 Gary Cheng, Armin Askari, Kannan Ramchandran, Laurent El Ghaoui

In this paper, we consider the problem of selecting representatives from a data set for arbitrary supervised/unsupervised learning tasks.

Dictionary Learning

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