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Next-generation sequencing technology enables the identification of thousands of gene regulatory sequences in many cell types and organisms. We consider the problem of testing if two such sequences differ in their number of binding site…

Genomics · Quantitative Biology 2014-02-04 Dennis Kostka , Tara Friedrich , Alisha K. Holloway , Katherine S. Pollard

Site-specific transcription factors (TFs) bind to their target sites on the DNA, where they regulate the rate at which genes are transcribed. Bacterial TFs undergo facilitated diffusion (a combination of 3D diffusion around and 1D random…

Molecular Networks · Quantitative Biology 2014-04-23 Daphne Ezer , Nicolae Radu Zabet , Boris Adryan

Artificial neural networks use a lot of coefficients that take a great deal of computing power for their adjustment, especially if deep learning networks are employed. However, there exist coefficients-free extremely fast indexing-based…

Computer Vision and Pattern Recognition · Computer Science 2022-05-04 Alexei Mikhailov , Mikhail Karavay

Factor analysis, often regarded as a Bayesian variant of matrix factorization, offers superior capabilities in capturing uncertainty, modeling complex dependencies, and ensuring robustness. As the deep learning era arrives, factor analysis…

Machine Learning · Computer Science 2024-08-02 Zhibin Duan , Tiansheng Wen , Yifei Wang , Chen Zhu , Bo Chen , Mingyuan Zhou

We consider the problem of developing interpretable and computationally efficient matrix decomposition methods for matrices whose entries have bounded support. Such matrices are found in large-scale DNA methylation studies and many other…

Machine Learning · Computer Science 2024-10-25 Anjali N. Albert , Patrick Flaherty , Aaron Schein

Deep neural network (DNN) models have recently obtained state-of-the-art prediction accuracy for the transcription factor binding (TFBS) site classification task. However, it remains unclear how these approaches identify meaningful DNA…

Machine Learning · Computer Science 2016-10-20 Jack Lanchantin , Ritambhara Singh , Beilun Wang , Yanjun Qi

Factor analysis is over a century old, but it is still problematic to choose the number of factors for a given data set. The scree test is popular but subjective. The best performing objective methods are recommended on the basis of…

Methodology · Statistics 2015-11-12 A. B. Owen , J. Wang

Transcription factors (TFs) are macromolecules that bind to \textit{cis}-regulatory specific sub-regions of DNA promoters and initiate transcription. Finding the exact location of these binding sites (aka motifs) is important in a variety…

Computer Vision and Pattern Recognition · Computer Science 2016-11-18 Hamid Reza Hassanzadeh , May D. Wang

This article presents a distributed vector representation model for learning folksong motifs. A skip-gram version of word2vec with negative sampling is used to represent high quality embeddings. Motifs from the Essen Folksong collection are…

Information Retrieval · Computer Science 2019-03-22 Aitor Arronte-Alvarez , Francisco Gómez-Martin

News recommender systems are hindered by the brief lifespan of articles, as they undergo rapid relevance decay. Recent studies have demonstrated the potential of content-based neural techniques in tackling this problem. However, these…

Information Retrieval · Computer Science 2024-11-14 Miguel Ângelo Rebelo , João Vinagre , Ivo Pereira , Álvaro Figueira

We review a class of methods that can be collected under the name nonlinear transform coding (NTC), which over the past few years have become competitive with the best linear transform codecs for images, and have superseded them in terms of…

The aim of this study is to provide a foundation to understand the relationship between non-negative matrix factorization (NMF) and non-negative autoencoders enabling proper interpretation and understanding of autoencoder-based alternatives…

Applications · Statistics 2024-05-14 Ida Egendal , Rasmus Froberg Brøndum , Marta Pelizzola , Asger Hobolth , Martin Bøgsted

Weakly-supervised anomaly detection aims at learning an anomaly detector from a limited amount of labeled data and abundant unlabeled data. Recent works build deep neural networks for anomaly detection by discriminatively mapping the normal…

Machine Learning · Computer Science 2021-08-29 Yingjie Zhou , Xucheng Song , Yanru Zhang , Fanxing Liu , Ce Zhu , Lingqiao Liu

Credit scoring models based on accepted applications may be biased and their consequences can have a statistical and economic impact. Reject inference is the process of attempting to infer the creditworthiness status of the rejected…

Computational Finance · Quantitative Finance 2021-09-27 Rogelio A. Mancisidor , Michael Kampffmeyer , Kjersti Aas , Robert Jenssen

Being able to identify regions within or around proteins, to which ligands can potentially bind, is an essential step to develop new drugs. Binding site identification methods can now profit from the availability of large amounts of 3D…

Alternative splicing is crucial in gene regulation, with significant implications in clinical settings and biotechnology. This review article compiles bioinformatics RNA-seq tools for investigating differential splicing; offering a detailed…

Genomics · Quantitative Biology 2024-09-10 Ben J Draper , Mark J Dunning , David C James

In this paper we explore the effects of negative sampling in dual encoder models used to retrieve passages for automatic question answering. We explore four negative sampling strategies that complement the straightforward random sampling of…

Computation and Language · Computer Science 2020-10-26 Jing Lu , Gustavo Hernandez Abrego , Ji Ma , Jianmo Ni , Yinfei Yang

Despite the impressive performances reported by deep neural networks in different application domains, they remain largely vulnerable to adversarial examples, i.e., input samples that are carefully perturbed to cause misclassification at…

Computer Vision and Pattern Recognition · Computer Science 2020-04-20 Angelo Sotgiu , Ambra Demontis , Marco Melis , Battista Biggio , Giorgio Fumera , Xiaoyi Feng , Fabio Roli

Neural networks often learn spurious correlations when exposed to biased training data, leading to poor performance on out-of-distribution data. A biased dataset can be divided, according to biased features, into bias-aligned samples (i.e.,…

Machine Learning · Computer Science 2023-08-17 Rui Hu , Yahan Tu , Jitao Sang

Using only global image-class labels, weakly-supervised learning methods, such as class activation mapping, allow training CNNs to jointly classify an image, and locate regions of interest associated with the predicted class. However,…

Image and Video Processing · Electrical Eng. & Systems 2022-05-06 Soufiane Belharbi , Marco Pedersoli , Ismail Ben Ayed , Luke McCaffrey , Eric Granger