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The brain-age gap is one of the most investigated risk markers for brain changes across disorders. While the field is progressing towards large-scale models, recently incorporating uncertainty estimates, no model to date provides the…

Topic models, such as latent Dirichlet allocation (LDA), can be useful tools for the statistical analysis of document collections and other discrete data. The LDA model assumes that the words of each document arise from a mixture of topics,…

应用统计 · 统计学 2009-09-29 David M. Blei , John D. Lafferty

When sample data are governed by an unknown sequence of independent but possibly non-identical distributions, the data-generating process (DGP) in general cannot be perfectly identified from the data. For making decisions facing such…

理论经济学 · 经济学 2022-05-11 Xiaoyu Cheng

Background: Psychedelic drugs facilitate profound changes in consciousness and have potential to provide insights into the nature of human mental processes and their relation to brain physiology. Yet published scientific literature reflects…

定量方法 · 定量生物学 2012-06-05 Jeremy R. Coyle , David E. Presti , Matthew J. Baggott

This article is concerned with automated complexity analysis of term rewrite systems. Since these systems underlie much of declarative programming, time complexity of functions defined by rewrite systems is of particular interest. Among…

计算机科学中的逻辑 · 计算机科学 2011-06-02 Nao Hirokawa , Georg Moser

Dialogue act (DA) classification has been studied for the past two decades and has several key applications such as workflow automation and conversation analytics. Researchers have used, to address this problem, various traditional machine…

Accurately assessing a patient's risk of a given event is essential in making informed treatment decisions. One approach is to stratify patients into two or more distinct risk groups with respect to a specific outcome using both clinical…

统计方法学 · 统计学 2015-03-17 Karen Lostritto , Robert Strawderman , Annette Molinaro

Word clouds became a standard tool for presenting results of natural language processing methods such as topic modelling. They exhibit most important words, where word size is often chosen proportional to the relevance of words within a…

统计计算 · 统计学 2023-02-14 Peter Winker

For organizing large text corpora topic modeling provides useful tools. A widely used method is Latent Dirichlet Allocation (LDA), a generative probabilistic model which models single texts in a collection of texts as mixtures of latent…

计算与语言 · 计算机科学 2020-04-02 Jonas Rieger , Lars Koppers , Carsten Jentsch , Jörg Rahnenführer

Spurious correlations threaten the validity of statistical classifiers. While model accuracy may appear high when the test data is from the same distribution as the training data, it can quickly degrade when the test distribution changes.…

机器学习 · 计算机科学 2020-12-21 Zhao Wang , Aron Culotta

In recent times, more and more people are posting about their mental states across various social media platforms. Leveraging this data, AI-based systems can be developed that help in assessing the mental health of individuals, such as…

人机交互 · 计算机科学 2024-12-20 Chayan Tank , Shaina Mehta , Sarthak Pol , Vinayak Katoch , Avinash Anand , Raj Jaiswal , Rajiv Ratn Shah

Deep Probabilistic Programming (DPP) allows powerful models based on recursive computation to be learned using efficient deep-learning optimization techniques. Additionally, DPP offers a unified perspective, where inference and learning…

机器学习 · 计算机科学 2022-03-31 Jonathan Warrell , Mark Gerstein

We develop a Gaussian process ("GP") framework for modeling mortality rates and mortality improvement factors. GP regression is a nonparametric, data-driven approach for determining the spatial dependence in mortality rates and jointly…

统计方法学 · 统计学 2018-04-13 Mike Ludkovski , Jimmy Risk , Howard Zail

We consider models for which it is important, early in processing, to estimate some variables with high precision, but perhaps at relatively low rates of recall. If some variables can be identified with near certainty, then they can be…

计算机视觉与模式识别 · 计算机科学 2009-07-03 Andrew Kae , Gary B. Huang , Erik Learned-Miller

Data-driven forecasts of air quality have recently achieved more accurate short-term predictions. Despite their success, most of the current data-driven solutions lack proper quantifications of model uncertainty that communicate how much to…

机器学习 · 计算机科学 2021-12-07 Abdulmajid Murad , Frank Alexander Kraemer , Kerstin Bach , Gavin Taylor

In this paper I present ongoing work on the data-oriented parsing (DOP) model. In previous work, DOP was tested on a cleaned-up set of analyzed part-of-speech strings from the Penn Treebank, achieving excellent test results. This left,…

cmp-lg · 计算机科学 2008-02-03 Rens Bod

Depression is the most common psychological disorder and is considered as a leading cause of disability and suicide worldwide. An automated system capable of detecting signs of depression in human speech can contribute to ensuring timely…

声音 · 计算机科学 2023-02-21 Mashrura Tasnim , Jekaterina Novikova

Speech datasets for identifying Alzheimer's disease (AD) are generally restricted to participants performing a single task, e.g. describing an image shown to them. As a result, models trained on linguistic features derived from such…

机器学习 · 计算机科学 2018-11-30 Aparna Balagopalan , Jekaterina Novikova , Frank Rudzicz , Marzyeh Ghassemi

When evaluating the performance of automatic speech recognition models, usually word error rate within a certain dataset is used. Special care must be taken in understanding the dataset in order to report realistic performance numbers. We…

计算与语言 · 计算机科学 2021-05-21 Aashish Agarwal , Torsten Zesch

Single-channel deep speech enhancement approaches often estimate a single multiplicative mask to extract clean speech without a measure of its accuracy. Instead, in this work, we propose to quantify the uncertainty associated with clean…

音频与语音处理 · 电气工程与系统科学 2023-05-16 Huajian Fang , Timo Gerkmann