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Ensembles of artificial neural networks show improved generalization capabilities that outperform those of single networks. However, for aggregation to be effective, the individual networks must be as accurate and diverse as possible. An…

人工智能 · 计算机科学 2007-05-23 P. M. Granitto , P. F. Verdes , H. A. Ceccatto

A range of defense methods have been proposed to improve the robustness of neural networks on adversarial examples, among which provable defense methods have been demonstrated to be effective to train neural networks that are certifiably…

机器学习 · 计算机科学 2021-01-21 Mengting Xu , Tao Zhang , Zhongnian Li , Daoqiang Zhang

We analyze complex networks under random matrix theory framework. Particularly, we show that $\Delta_3$ statistic, which gives information about the long range correlations among eigenvalues, provides a qualitative measure of randomness in…

统计力学 · 物理学 2015-05-13 Sarika Jalan , Jayendra N. Bandyopadhyay

Neural networks trained on biased datasets tend to inadvertently learn spurious correlations, hindering generalization. We formally prove that (1) samples that exhibit spurious correlations lie on a lower rank manifold relative to the ones…

机器学习 · 计算机科学 2024-11-07 Silpa Vadakkeeveetil Sreelatha , Adarsh Kappiyath , Abhra Chaudhuri , Anjan Dutta

Network meta-analysis combines aggregate data (AgD) from multiple randomised controlled trials, assuming that any effect modifiers are balanced across populations. Individual patient data (IPD) meta-regression is the "gold standard" method…

统计方法学 · 统计学 2024-01-25 David M. Phillippo , Sofia Dias , A. E. Ades , Nicky J. Welton

Dropout is a regularization technique widely used in training artificial neural networks to mitigate overfitting. It consists of dynamically deactivating subsets of the network during training to promote more robust representations. Despite…

机器学习 · 统计学 2025-09-10 Francesco Mori , Francesca Mignacco

The study of random networks in a neuroscientific context has developed extensively over the last couple of decades. By contrast, techniques for the statistical analysis of these networks are less developed. In this paper, we focus on the…

神经元与认知 · 定量生物学 2017-07-11 Daniel Fraiman , Ricardo Fraiman

Disease-gene association through Genome-wide association study (GWAS) is an arduous task for researchers. Investigating single nucleotide polymorphisms (SNPs) that correlate with specific diseases needs statistical analysis of associations.…

定量方法 · 定量生物学 2020-12-21 Sezin Kircali Ata , Min Wu , Yuan Fang , Le Ou-Yang , Chee Keong Kwoh , Xiao-Li Li

Degree correlation is a crucial measure in networks, significantly impacting network topology and dynamical behavior. The degree sequence of a network is a significant characteristic, and altering network degree correlation through…

社会与信息网络 · 计算机科学 2024-04-12 Shuo Zou , Bo Zhou , Qi Xuan

Model reparametrization, which follows the change-of-variable rule of calculus, is a popular way to improve the training of neural nets. But it can also be problematic since it can induce inconsistencies in, e.g., Hessian-based flatness…

机器学习 · 计算机科学 2023-10-24 Agustinus Kristiadi , Felix Dangel , Philipp Hennig

Objective: We aim to utilise real world data in evidence synthesis to optimise an evidence base for the effectiveness of biologic therapies in rheumatoid arthritis in order to allow for evidence on first-line therapies to inform second-line…

Graphical models are widely used to study complex multivariate biological systems. Network inference algorithms aim to reverse-engineer such models from noisy experimental data. It is common to assess such algorithms using techniques from…

统计方法学 · 统计学 2014-03-03 Chris J. Oates , Richard Amos , Simon E. F. Spencer

Successful deployment of Deep Neural Networks (DNNs) requires their validation with an adequate test set to ensure a sufficient degree of confidence in test outcomes. Although well-established test adequacy assessment techniques have been…

软件工程 · 计算机科学 2024-10-21 Amin Abbasishahkoo , Mahboubeh Dadkhah , Lionel Briand , Dayi Lin

Estimating the effects of interventions in networks is complicated when the units are interacting, such that the outcomes for one unit may depend on the treatment assignment and behavior of many or all other units (i.e., there is…

统计方法学 · 统计学 2014-08-15 Dean Eckles , Brian Karrer , Johan Ugander

Understanding the causes and effects of network structural features is a key task in deciphering complex systems. In this context, the property of network nestedness has aroused a fair amount of interest as regards ecological networks.…

物理与社会 · 物理学 2013-09-23 Samuel Johnson , Virginia Dominguez-Garcia , Miguel A. Munoz

This article studies Bayesian model averaging (BMA) in the context of competing expensive computer models in a typical nuclear physics setup. While it is well known that BMA accounts for the additional uncertainty of the model itself, we…

统计方法学 · 统计学 2019-08-26 Vojtech Kejzlar , Léo Neufcourt , Taps Maiti , Frederi Viens

The influence of deep learning is continuously expanding across different domains, and its new applications are ubiquitous. The question of neural network design thus increases in importance, as traditional empirical approaches are reaching…

神经与进化计算 · 计算机科学 2021-01-29 Anton Muravev , Jenni Raitoharju , Moncef Gabbouj

The verification problem for neural networks is verifying whether a neural network will suffer from adversarial samples, or approximating the maximal allowed scale of adversarial perturbation that can be endured. While most prior work…

机器学习 · 计算机科学 2018-11-16 Qinglong Wang , Kaixuan Zhang , Xue Liu , C. Lee Giles

Multivariate meta-analysis (MMA) is a powerful tool for jointly estimating multiple outcomes' treatment effects. However, the validity of results from MMA is potentially compromised by outcome reporting bias (ORB), or the tendency for…

应用统计 · 统计学 2021-10-19 Ray Bai , Xiaokang Liu , Lifeng Lin , Yulun Liu , Stephen E. Kimmel , Haitao Chu , Yong Chen

Bayesian model comparison (BMC) offers a principled probabilistic approach to study and rank competing models. In standard BMC, we construct a discrete probability distribution over the set of possible models, conditional on the observed…

机器学习 · 统计学 2023-02-22 Marvin Schmitt , Stefan T. Radev , Paul-Christian Bürkner