Search Results for author: Andrew Li

Found 10 papers, 3 papers with code

Deep Few-view High-resolution Photon-counting Extremity CT at Halved Dose for a Clinical Trial

no code implementations19 Mar 2024 Mengzhou Li, Chuang Niu, Ge Wang, Maya R Amma, Krishna M Chapagain, Stefan Gabrielson, Andrew Li, Kevin Jonker, Niels de Ruiter, Jennifer A Clark, Phil Butler, Anthony Butler, Hengyong Yu

Despite the success of deep learning methods for 2D few-view reconstruction, applying them to HR volumetric reconstruction of extremity scans for clinical diagnosis has been limited due to GPU memory constraints, training data scarcity, and domain gap issues.

Image Reconstruction

Short-lived High-volume Multi-A(rmed)/B(andits) Testing

no code implementations23 Dec 2023 Su Jia, Andrew Li, R. Ravi, Nishant Oli, Paul Duff, Ian Anderson

We aim to minimize the loss due to not knowing the mean rewards, averaged over instances generated from a given prior distribution.

Markdown Pricing Under an Unknown Parametric Demand Model

no code implementations23 Dec 2023 Su Jia, Andrew Li, R. Ravi

Without monotonicity, the minimax regret is $\tilde O(n^{2/3})$ for the Lipschitz demand family and $\tilde O(n^{1/2})$ for a general class of parametric demand models.

FLIQS: One-Shot Mixed-Precision Floating-Point and Integer Quantization Search

no code implementations7 Aug 2023 Jordan Dotzel, Gang Wu, Andrew Li, Muhammad Umar, Yun Ni, Mohamed S. Abdelfattah, Zhiru Zhang, Liqun Cheng, Martin G. Dixon, Norman P. Jouppi, Quoc V. Le, Sheng Li

With the proposed integer quantization search, we increase the accuracy of ResNet-18 on ImageNet by 1. 31% points and ResNet-50 by 0. 90% points with equivalent model cost over previous methods.

Quantization

Multimodal Image-Text Matching Improves Retrieval-based Chest X-Ray Report Generation

1 code implementation29 Mar 2023 Jaehwan Jeong, Katherine Tian, Andrew Li, Sina Hartung, Fardad Behzadi, Juan Calle, David Osayande, Michael Pohlen, Subathra Adithan, Pranav Rajpurkar

In this work, we propose Contrastive X-Ray REport Match (X-REM), a novel retrieval-based radiology report generation module that uses an image-text matching score to measure the similarity of a chest X-ray image and radiology report for report retrieval.

Image Captioning Image-text matching +2

TripLe: Revisiting Pretrained Model Reuse and Progressive Learning for Efficient Vision Transformer Scaling and Searching

no code implementations ICCV 2023 Cheng Fu, Hanxian Huang, Zixuan Jiang, Yun Ni, Lifeng Nai, Gang Wu, Liqun Cheng, Yanqi Zhou, Sheng Li, Andrew Li, Jishen Zhao

One promising way to accelerate transformer training is to reuse small pretrained models to initialize the transformer, as their existing representation power facilitates faster model convergence.

Knowledge Distillation Neural Architecture Search

Greedy Approximation Algorithms for Active Sequential Hypothesis Testing

no code implementations NeurIPS 2021 Kyra Gan, Su Jia, Andrew Li

In the problem of active sequential hypothesis testing (ASHT), a learner seeks to identify the true hypothesis from among a known set of hypotheses.

LTL2Action: Generalizing LTL Instructions for Multi-Task RL

1 code implementation13 Feb 2021 Pashootan Vaezipoor, Andrew Li, Rodrigo Toro Icarte, Sheila Mcilraith

We address the problem of teaching a deep reinforcement learning (RL) agent to follow instructions in multi-task environments.

Reinforcement Learning (RL)

Searching for Fast Model Families on Datacenter Accelerators

no code implementations CVPR 2021 Sheng Li, Mingxing Tan, Ruoming Pang, Andrew Li, Liqun Cheng, Quoc Le, Norman P. Jouppi

On top of our DC accelerator optimized neural architecture search space, we further propose a latency-aware compound scaling (LACS), the first multi-objective compound scaling method optimizing both accuracy and latency.

Neural Architecture Search

Segmenting Unknown 3D Objects from Real Depth Images using Mask R-CNN Trained on Synthetic Data

4 code implementations16 Sep 2018 Michael Danielczuk, Matthew Matl, Saurabh Gupta, Andrew Li, Andrew Lee, Jeffrey Mahler, Ken Goldberg

We train a variant of Mask R-CNN with domain randomization on the generated dataset to perform category-agnostic instance segmentation without any hand-labeled data and we evaluate the trained network, which we refer to as Synthetic Depth (SD) Mask R-CNN, on a set of real, high-resolution depth images of challenging, densely-cluttered bins containing objects with highly-varied geometry.

Clustering Object Tracking +2

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