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In order to scale economically, data centers are increasingly evolving their data storage methods from the use of simple data replication to the use of more powerful erasure codes, which provide the same level of reliability as replication…

信息论 · 计算机科学 2013-11-12 Nihar B. Shah , Kangwook Lee , Kannan Ramchandran

Data privacy and class imbalance are the norm rather than the exception in many machine learning tasks. Recent attempts have been launched to, on one side, address the problem of learning from pervasive private data, and on the other side,…

机器学习 · 计算机科学 2022-07-01 Zihan Chen , Songshang Liu , Hualiang Wang , Howard H. Yang , Tony Q. S. Quek , Zuozhu Liu

Data-intensive platforms such as Hadoop and Spark are routinely used to process massive amounts of data residing on distributed file systems like HDFS. Increasing memory sizes and new hardware technologies (e.g., NVRAM, SSDs) have recently…

分布式、并行与集群计算 · 计算机科学 2020-06-22 Herodotos Herodotou , Elena Kakoulli

Distributed data naturally arise in scenarios involving multiple sources of observations, each stored at a different location. Directly pooling all the data together is often prohibited due to limited bandwidth and storage, or due to…

统计方法学 · 统计学 2021-07-07 Jiyu Luo , Qiang Sun , Wenxin Zhou

In this abstract we present a series of optimizations we performed on the two-tower model architecture [14], and training and evaluation datasets to implement semantic product search at Best Buy. Search queries on bestbuy.com follow the…

信息检索 · 计算机科学 2025-05-27 Akshay Kekuda , Yuyang Zhang , Arun Udayashankar

Datacenter applications demand both low latency and high throughput; while interactive applications (e.g., Web Search) demand low tail latency for their short messages due to their partition-aggregate software architecture, many…

网络与互联网体系结构 · 计算机科学 2018-07-09 Hamed Rezaei , Mojtaba Malekpourshahraki , Balajee Vamanan

This paper investigates sequencing policies for file reading requests in linear storage devices, such as magnetic tapes. Tapes are the technology of choice for long-term storage in data centers due to their low cost and reliability.…

数据结构与算法 · 计算机科学 2022-05-11 Carlos H. Cardonha , Andre A. Cire , Lucas C. Villa Real

Long-tailed learning has attracted much attention recently, with the goal of improving generalisation for tail classes. Most existing works use supervised learning without considering the prevailing noise in the training dataset. To move…

机器学习 · 计算机科学 2021-08-27 Tong Wei , Jiang-Xin Shi , Wei-Wei Tu , Yu-Feng Li

Benchmark datasets for visual recognition assume that data is uniformly distributed, while real-world datasets obey long-tailed distribution. Current approaches handle the long-tailed problem to transform the long-tailed dataset to uniform…

计算机视觉与模式识别 · 计算机科学 2022-04-25 Renhui Zhang , Tiancheng Lin , Rui Zhang , Yi Xu

In risk analysis, a global fit that appropriately captures the body and the tail of the distribution of losses is essential. Modelling the whole range of the losses using a standard distribution is usually very hard and often impossible due…

统计方法学 · 统计学 2017-09-19 Tom Reynkens , Roel Verbelen , Jan Beirlant , Katrien Antonio

Queue length violation probability, i.e., the tail distribution of the queue length, is a widely used statistical quality-of-service (QoS) metric in wireless communications. Characterizing and optimizing the queue length violation…

信息论 · 计算机科学 2021-11-24 Lintao Li , Wei Chen , Khaled B. Letaief

For many optimization algorithms the time-to-solution depends not only on the problem size but also on the specific problem instance and may vary by many orders of magnitude. It is then necessary to investigate the full distribution and…

量子物理 · 物理学 2015-12-08 Damian S. Steiger , Troels F. Rønnow , Matthias Troyer

Recently, long-tailed image classification harvests lots of research attention, since the data distribution is long-tailed in many real-world situations. Piles of algorithms are devised to address the data imbalance problem by biasing the…

计算机视觉与模式识别 · 计算机科学 2023-02-06 Chaowei Fang , Dingwen Zhang , Wen Zheng , Xue Li , Le Yang , Lechao Cheng , Junwei Han

Natural data are often long-tail distributed over semantic classes. Existing recognition methods tackle this imbalanced classification by placing more emphasis on the tail data, through class re-balancing/re-weighting or ensembling over…

计算机视觉与模式识别 · 计算机科学 2022-05-03 Xudong Wang , Long Lian , Zhongqi Miao , Ziwei Liu , Stella X. Yu

Motivated by the empirical observation of power-law distributions in the credits (e.g., ``likes'') of viral posts in social media, we introduce a high-dimensional tail index regression model and propose methods for estimation and inference…

机器学习 · 统计学 2026-01-19 Yuya Sasaki , Jing Tao , Yulong Wang

We study the fundamental task of outlier-robust mean estimation for heavy-tailed distributions in the presence of sparsity. Specifically, given a small number of corrupted samples from a high-dimensional heavy-tailed distribution whose mean…

数据结构与算法 · 计算机科学 2022-11-30 Ilias Diakonikolas , Daniel M. Kane , Jasper C. H. Lee , Ankit Pensia

In a distributed storage system, code symbols are dispersed across space in nodes or storage units as opposed to time. In settings such as that of a large data center, an important consideration is the efficient repair of a failed node.…

We consider the probability of data loss, or equivalently, the reliability function for an erasure coded distributed data storage system under worst case conditions. Data loss in an erasure coded system depends on probability distributions…

分布式、并行与集群计算 · 计算机科学 2016-11-18 Antonio Campello , Vinay A. Vaishampayan

We propose an analytical approach to the computation of tail probabilities of compound distributions whose individual components have heavy tails. Our approach is based on the contour integration method, and gives rise to a representation…

计算金融 · 定量金融 2017-10-04 Igor Halperin

Long-tail recognition tackles the natural non-uniformly distributed data in real-world scenarios. While modern classifiers perform well on populated classes, its performance degrades significantly on tail classes. Humans, however, are less…

计算机视觉与模式识别 · 计算机科学 2020-07-21 Tz-Ying Wu , Pedro Morgado , Pei Wang , Chih-Hui Ho , Nuno Vasconcelos