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Unlabeled data is often used to learn representations which can be used to supplement baseline features in a supervised learner. For example, for text applications where the words lie in a very high dimensional space (the size of the…

计算与语言 · 计算机科学 2012-07-03 Paramveer Dhillon , Jordan Rodu , Dean Foster , Lyle Ungar

In two-way contingency tables under an asymmetric situation, where the row and column variables are defined as explanatory and response variables, respectively, quantifying the extent to which the explanatory variable contributes to…

统计方法学 · 统计学 2026-04-17 Wataru Urasaki , Kouji Tahata , Sadao Tomizawa

In the new perspective of spatial quantization, this article systematically studies the advantages of reconfigurable reflectarray (RRA) designed with closely spaced elements in terms of sidelobe level (SLL), scanning accuracy and scan loss,…

应用物理 · 物理学 2025-02-03 Xiaocun Zong , Fan Yang , Shenheng Xu , Maokun Li

Differential abundance analysis is at the core of statistical analysis of microbiome data. The compositional nature of microbiome sequencing data makes false positive control challenging. Here, we show that the compositional effects can be…

统计方法学 · 统计学 2022-03-15 Huijuan Zhou , Kejun He , Jun Chen , Xianyang Zhang

Robust Principal Component Analysis (RPCA) is a fundamental technique for decomposing data into low-rank and sparse components, which plays a critical role for applications such as image processing and anomaly detection. Traditional RPCA…

机器学习 · 计算机科学 2024-12-20 Kexin Li , You-wei Wen , Xu Xiao , Mingchao Zhao

LoRA-based continual learning represents a promising avenue for leveraging pre-trained models in downstream continual learning tasks. Recent studies have shown that orthogonal LoRA tuning effectively mitigates forgetting. However, this work…

计算机视觉与模式识别 · 计算机科学 2025-04-21 Shimou Ling , Liang Zhang , Jiangwei Zhao , Lili Pan , Hongliang Li

This letter proposes a novel hybrid automatic repeat request with chase combining assisted sparse code multiple access (HARQ-CC-SCMA) scheme. Depending on whether the same superimposed packet are retransmitted, synchronous and asynchronous…

信息论 · 计算机科学 2024-04-16 Man Wang , Zheng Shi , Yunfei Li , Xianda Wu , Weiqiang Tan , Xinrong Ye

Compositional data are commonly known as multivariate observations carrying relative information. Even though the case of vector or even two-factorial compositional data (compositional tables) is already well described in the literature,…

统计方法学 · 统计学 2022-01-26 Kamila Fačevicová , Peter Filzmoser , Karel Hron

Recurrence quantification analysis (RQA) is a well established method of nonlinear data analysis. In this work we present a new strategy for an almost parameter-free RQA. The approach finally omits the choice of the threshold parameter by…

数据分析、统计与概率 · 物理学 2022-11-02 Radim Pánis , Karel Adámek , Norbert Marwan

Principal Component Analysis (PCA) is a ubiquitous tool with many applications in machine learning including feature construction, subspace embedding, and outlier detection. In this paper, we present an algorithm for computing the top…

机器学习 · 计算机科学 2013-10-25 Nikos Karampatziakis , Paul Mineiro

Comparison is a core task in visual analysis. Although there are numerous guidelines to help users design effective visualizations to aid known comparison tasks, there are few techniques available when users want to make ad hoc comparisons…

人机交互 · 计算机科学 2022-02-17 Eugene Wu

Canonical correlation analysis (CCA) is a multivariate statistical method which describes the associations between two sets of variables. The objective is to find linear combinations of the variables in each data set having maximal…

统计方法学 · 统计学 2015-01-07 Ines Wilms , Christophe Croux

Principal components analysis (PCA) is a well-known technique for approximating a tabular data set by a low rank matrix. Here, we extend the idea of PCA to handle arbitrary data sets consisting of numerical, Boolean, categorical, ordinal,…

机器学习 · 统计学 2015-05-06 Madeleine Udell , Corinne Horn , Reza Zadeh , Stephen Boyd

Canonical correlation analysis (CCA) is a technique for measuring the association between two multivariate data matrices. A regularized modification of canonical correlation analysis (RCCA) which imposes an $\ell_2$ penalty on the CCA…

统计方法学 · 统计学 2021-07-30 Elena Tuzhilina , Leonardo Tozzi , Trevor Hastie

Principal Component Analysis (PCA) has been widely used for dimensionality reduction and feature extraction. Robust PCA (RPCA), under different robust distance metrics, such as l1-norm and l2, p-norm, can deal with noise or outliers to some…

机器学习 · 计算机科学 2021-06-29 Zhao Kang , Hongfei Liu , Jiangxin Li , Xiaofeng Zhu , Ling Tian

The prefill stage in long-context LLM inference remains a computational bottleneck. Recent token-ranking heuristics accelerate inference by selectively processing a subset of semantically relevant tokens. However, existing methods suffer…

计算与语言 · 计算机科学 2026-02-19 Bradley McDanel , Steven Li , Harshit Khaitan

Probe-level models have led to improved performance in microarray studies but the various sources of probe-level contamination are still poorly understood. Data-driven analysis of probe performance can be used to quantify the uncertainty in…

计算工程、金融与科学 · 计算机科学 2013-04-09 Leo Lahti , Laura L. Elo , Tero Aittokallio , Samuel Kaski

In current applied research the most-used route to an analysis of composition is through log-ratios -- that is, contrasts among log-transformed measurements. Here we argue instead for a more direct approach, using a statistical model for…

统计方法学 · 统计学 2023-12-19 David Firth , Fiona Sammut

Canonical correlation analysis (CCA) is a multivariate statistical technique for finding the linear relationship between two sets of variables. The kernel generalization of CCA named kernel CCA has been proposed to find nonlinear relations…

机器学习 · 统计学 2017-01-17 Xiaowei Zhang , Delin Chu , Li-Zhi Liao , Michael K. Ng

Many areas of machine learning and science involve large linear algebra problems, such as eigendecompositions, solving linear systems, computing matrix exponentials, and trace estimation. The matrices involved often have Kronecker,…

机器学习 · 计算机科学 2023-11-30 Andres Potapczynski , Marc Finzi , Geoff Pleiss , Andrew Gordon Wilson