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Pseudo-relevance feedback (PRF) can enhance average retrieval effectiveness over a sufficiently large number of queries. However, PRF often introduces a drift into the original information need, thus hurting the retrieval effectiveness of…

信息检索 · 计算机科学 2024-01-23 Suchana Datta , Debasis Ganguly , Sean MacAvaney , Derek Greene

We describe a variational approximation method for efficient inference in large-scale probabilistic models. Variational methods are deterministic procedures that provide approximations to marginal and conditional probabilities of interest.…

人工智能 · 计算机科学 2011-05-30 T. S. Jaakkola , M. I. Jordan

Next-generation sequencing technologies now constitute a method of choice to measure gene expression. Data to analyze are read counts, commonly modeled using Negative Binomial distributions. A relevant issue associated with this…

统计方法学 · 统计学 2014-11-10 Elisabetta Bonafede , Franck Picard , Stéphane Robin , Cinzia Viroli

Transcription Factors (TFs) are proteins that regulate gene expression. The regulation mechanism is via the binding of a TF to a specific part of the gene associated with it, the TF's target. The target of a specific TF corresponds to a…

统计力学 · 物理学 2022-09-02 Ori Hachmo , Ariel Amir

Peer reviews, evaluations, and selections are a fundamental aspect of modern science. Funding bodies the world over employ experts to review and select the best proposals from those submitted for funding. The problem of peer selection,…

计算机科学与博弈论 · 计算机科学 2019-05-01 Haris Aziz , Omer Lev , Nicholas Mattei , Jeffrey S. Rosenschein , Toby Walsh

Bayesian inference for models with intractable likelihood functions represents a challenging suite of problems in modern statistics. In this work we analyse the Conway-Maxwell-Poisson (COM-Poisson) distribution, a two parameter…

统计计算 · 统计学 2020-07-13 Alan Benson , Nial Friel

In recent years, neural network-based anomaly detection methods have attracted considerable attention in the hyperspectral remote sensing domain due to the powerful reconstruction ability compared with traditional methods. However, actual…

计算机视觉与模式识别 · 计算机科学 2021-05-17 Shaoqi Yu , Xiaorun Li , Shuhan Chen , Liaoying Zhao

Decision Trees and Random Forests are among the most widely used machine learning models, and often achieve state-of-the-art performance in tabular, domain-agnostic datasets. Nonetheless, being primarily discriminative models they lack…

机器学习 · 统计学 2020-07-14 Alvaro H. C. Correia , Robert Peharz , Cassio de Campos

Ultra high-throughput sequencing of transcriptomes (RNA-Seq) has enabled the accurate estimation of gene expression at individual isoform level. However, systematic biases introduced during the sequencing and mapping processes as well as…

统计方法学 · 统计学 2013-10-02 Hui Jiang , Julia Salzman

It is becoming routine to obtain datasets on DNA sequence variation across several thousands of chromosomes, providing unprecedented opportunity to infer the underlying biological and demographic forces. Such data make it vital to study…

种群与进化 · 定量生物学 2015-06-24 Paul A. Jenkins , Jonas W. Mueller , Yun S. Song

Predictions of nuclear properties far from measured data are inherently imprecise because of uncertainties in our knowledge of nuclear forces and in our treatment of quantum many-body effects in strongly-interacting systems. While the model…

核理论 · 物理学 2022-09-14 Rodrigo Navarro Perez , Nicolas Schunck

Fourier methods are fundamental tools to analyze random fields. Statistical structures of homogeneous Gaussian random fields are completely characterized by the power spectrum. In non-Gaussian random fields, polyspectra, higher-order…

天体物理学 · 物理学 2009-11-11 Takahiko Matsubara

We present a new modeling technique for solving the problem of ecological inference, in which individual-level associations are inferred from labeled data available only at the aggregate level. We model aggregate count data as arising from…

机器学习 · 统计学 2018-02-06 Evan Rosenman , Nitin Viswanathan

Variable selection methods are required in practical statistical modeling, to identify and include only the most relevant predictors, and then improving model interpretability. Such variable selection methods are typically employed in…

One may consider three types of statistical inference: Bayesian, frequentist, and group invariance-based. The focus here is on the last method. We consider the Poisson and binomial distributions in detail to illustrate a group invariance…

概率论 · 数学 2007-06-13 B. Heller , M. Wang

Observation of phenotypic diversity in a population of genetically identical cells is often linked to the stochastic nature of chemical reactions involved in gene regulatory networks. We investigate the distribution of population averaged…

分子网络 · 定量生物学 2015-06-18 Bhaswati Bhattacharyya , Ziya Kalay

Genetic variation in human populations is influenced by geographic ancestry due to spatial locality in historical mating and migration patterns. Spatial population structure in genetic datasets has been traditionally analyzed using either…

种群与进化 · 定量生物学 2016-10-26 Anand Bhaskar , Adel Javanmard , Thomas A. Courtade , David Tse

Substantial progress has been made in identifying single genetic variants predisposing to common complex diseases. Nonetheless, the genetic etiology of human diseases remains largely unknown. Human complex diseases are likely influenced by…

统计方法学 · 统计学 2014-05-27 Zihuai He , Min Zhang , Xiaowei Zhan , Qing Lu

We introduce a new predictive mechanism that operates in the presence of hidden confounding across distributionally diverse data sources while ensuring consistent estimation of causal parameters-despite their recognized suboptimality for…

统计理论 · 数学 2025-04-01 Carlos García Meixide , David Ríos Insua

Well-calibrated probabilistic regression models are a crucial learning component in robotics applications as datasets grow rapidly and tasks become more complex. Unfortunately, classical regression models are usually either probabilistic…

机器学习 · 计算机科学 2023-09-12 Hany Abdulsamad , Peter Nickl , Pascal Klink , Jan Peters