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November 5, 20266 min readAmazon senior applied scientist and coauthors showed that an overlooked mathematical condition from 1963 proves why frequently used machine-learning optimization methods work well.
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October 20, 20263 min read
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October 12, 202614 min read
Featured news
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Optimization Online2022We present an inventory management solution for a non-stationary capacitated multi-echelon distribution network involving thousands of products. Assuming backlogged sales, we revisit and leverage the seminal multi-echelon inventory management results in the literature to establish the structural properties of the problem, and derive an efficient and practical solution method. In particular, we describe
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KDD 2022 Workshop on First Content Understanding and Generation for e-Commerce2022Slate-level recommendation is widely adopted in online services including e-commerce, video streaming and news services. Customers may observe a set of recommended items and interact with the content accordingly. Due to the combinatorial characteristics of slate level recommendation, various current ranking models are still aiming to optimize item level scores, instead of the slate level score. One key
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USENIX ATC 20222022Amazon DynamoDB is a NoSQL cloud database service that provides consistent performance at any scale. Hundreds of thousands of customers rely on DynamoDB for its fundamental properties: consistent performance, availability, durability, and a fully managed serverless experience. In 2021, during the 66-hour Amazon Prime Day shopping event, Amazon systems - including Alexa, the Amazon.com sites, and Amazon
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APSys Workshop on Systems2022Convolutional Neural Networks (CNNs) are widely used in real world applications, e.g, computer vision. Winograd based convolution are usually applied due to its low computation complexity. For the underling hardware, ARM many-core CPUs, by their price performance, are favored by cloud providers like Amazon Web Services (AWS). However, existing Winograd convolution implementations for ARM architecture are
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RLDM 2022 Workshop2022We study task-agnostic continual reinforcement learning (TACRL) in which standard RL challenges are compounded with partial observability stemming from ask agnosticism, as well as additional difficulties of continual learning (CL), i.e., learning on a non-stationary sequence of tasks. Here we compare TACRL methods with their soft upper bounds prescribed by previous literature: multi-task learning (MTL)
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