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When multiple investigators analyze a common dataset, the data reuse induces dependence across testing procedures, affecting the distribution of errors. Existing techniques of managing dependent tests require either cross-study coordination…

统计理论 · 数学 2026-04-10 Reid Dale , Jordan Rodu , Maria E. Currie , Mike Baiocchi

Pattern-mixture models have received increasing attention as they are commonly used to assess treatment effects in primary or sensitivity analyses for clinical trials with nonignorable missing data. Pattern-mixture models have traditionally…

统计方法学 · 统计学 2024-10-10 Jitong Lou , Mallikarjuna Rettiganti , Yongming Qu

In the era of Model-as-a-Service, organizations increasingly rely on third-party AI models for rapid deployment. However, the dynamic nature of emerging AI applications, the continual introduction of new datasets, and the growing number of…

机器学习 · 计算机科学 2026-02-10 Zihan Zhu , Yanqiu Wu , Qiongkai Xu

Many current state-of-the-art methods for anomaly localization in medical images rely on calculating a residual image between a potentially anomalous input image and its "healthy" reconstruction. As the reconstruction of the unseen…

图像与视频处理 · 电气工程与系统科学 2023-09-26 Felix Meissen , Benedikt Wiestler , Georgios Kaissis , Daniel Rueckert

As one of the most challenging and practical segmentation tasks, open-world semantic segmentation requires the model to segment the anomaly regions in the images and incrementally learn to segment out-of-distribution (OOD) objects,…

计算机视觉与模式识别 · 计算机科学 2022-05-18 Hexin Dong , Zifan Chen , Mingze Yuan , Yutong Xie , Jie Zhao , Fei Yu , Bin Dong , Li Zhang

In this paper, we discuss the utilization of perturbed risk levels (PRLs) for the solution of chance-constrained problems via sampling-based approaches. PRLs allow the consideration of distributional ambiguity by rescaling the risk level of…

最优化与控制 · 数学 2025-12-12 Moritz Heinlein , Teodoro Alamo , Sergio Lucia

Marginal maximum likelihood estimation (MMLE) in item response theory (IRT) is highly sensitive to aberrant responses, such as careless answering and random guessing, which can reduce estimation accuracy. To address this issue, this study…

统计方法学 · 统计学 2025-02-18 Yuki Itaya , Kenichi Hayashi

Given a collection of feature maps indexed by a set $\mathcal{T}$, we study the performance of empirical risk minimization (ERM) on regression problems with square loss over the union of the linear classes induced by these feature maps.…

机器学习 · 统计学 2024-11-20 Ayoub El Hanchi , Chris J. Maddison , Murat A. Erdogdu

We suggest an iterative approach to computing K-step maximum likelihood estimates (MLE) of the parametric components in semiparametric models based on their profile likelihoods. The higher order convergence rate of K-step MLE mainly depends…

统计理论 · 数学 2007-08-23 Guang Cheng

The stochastic variational inequality problem (SVIP) is an equilibrium model that includes random variables and has been widely applied in various fields such as economics and engineering. Expected residual minimization (ERM) is an…

最优化与控制 · 数学 2023-01-25 Atsushi Hori , Yuya Yamakawa , Nobuo Yamashita

We consider the problem of full information maximum likelihood (FIML) estimation in a factor analysis model when a majority of the data values are missing. The expectation-maximization (EM) algorithm is often used to find the FIML…

统计计算 · 统计学 2013-12-20 Kei Hirose , Sunyong Kim , Yutaka Kano , Miyuki Imada , Manabu Yoshida , Masato Matsuo

Maximum pseudo-likelihood (MPL) is a semiparametric estimation method often used to obtain the dependence parameters in copula models from data. It has been shown that despite being consistent, and in some cases efficient, MPL estimation…

统计方法学 · 统计学 2022-09-07 Alexandra Dias

The Finite Element Method (FEM) is a well-established procedure for computing approximate solutions to deterministic engineering problems described by partial differential equations. FEM produces discrete approximations of the solution with…

This paper presents a minimalist neural regression network as an aggregate of independent identical regression blocks that are trained simultaneously. Moreover, it introduces a new multiplicative parameter, shared by all the neural units of…

机器学习 · 计算机科学 2016-07-06 Soheil Keshmiri

The restricted maximum likelihood (REML) estimator of the dispersion matrix for random coefficient models is rewritten in terms of the sufficient statistics of the individual regressions.

统计方法学 · 统计学 2019-11-14 Kurt S. Riedel

This paper studies the problem of data collection for policy evaluation in Markov decision processes (MDPs). In policy evaluation, we are given a target policy and asked to estimate the expected cumulative reward it will obtain in an…

机器学习 · 计算机科学 2022-06-22 Subhojyoti Mukherjee , Josiah P. Hanna , Robert Nowak

Machine Learning (ML) can substantially improve the efficiency and effectiveness of organizations and is widely used for different purposes within Software Engineering. However, the selection and implementation of ML techniques rely almost…

软件工程 · 计算机科学 2021-09-30 Gouri Deshpande , Guenther Ruhe , Chad Saunders

Retriever-augmented generation (RAG) has become a widely adopted approach for enhancing the factual accuracy of large language models (LLMs). While current benchmarks evaluate the performance of RAG methods from various perspectives, they…

信息检索 · 计算机科学 2025-04-08 Kepu Zhang , Zhongxiang Sun , Weijie Yu , Xiaoxue Zang , Kai Zheng , Yang Song , Han Li , Jun Xu

Achieving sample efficiency in online episodic reinforcement learning (RL) requires optimally balancing exploration and exploitation. When it comes to a finite-horizon episodic Markov decision process with $S$ states, $A$ actions and…

机器学习 · 计算机科学 2022-10-18 Gen Li , Laixi Shi , Yuxin Chen , Yuejie Chi

Parameter-efficient transfer learning (PETL) has emerged as a flourishing research field for adapting large pre-trained models to downstream tasks, greatly reducing trainable parameters while grappling with memory challenges during…

计算机视觉与模式识别 · 计算机科学 2024-07-11 Haiwen Diao , Bo Wan , Xu Jia , Yunzhi Zhuge , Ying Zhang , Huchuan Lu , Long Chen