Results 21 to 30 of about 700,908 (311)

Comparison of three recent discrete stochastic inversion methods and influence of the prior choice

open access: yesComptes Rendus. Géoscience, 2022
Groundwater flow depends on subsurface heterogeneity, which often calls for categorical fields to represent different geological facies. The knowledge about subsurface is however limited and often provided indirectly by state variables, such as hydraulic
Juda, Przemysław   +2 more
doaj   +1 more source

Machine learning through cryptographic glasses: combating adversarial attacks by key-based diversified aggregation

open access: yesEURASIP Journal on Information Security, 2020
In recent years, classification techniques based on deep neural networks (DNN) were widely used in many fields such as computer vision, natural language processing, and self-driving cars. However, the vulnerability of the DNN-based classification systems
Olga Taran   +3 more
doaj   +1 more source

Estimation of the Conditional Hazard Function with a Recursive Kernel from Censored Functional Ergodic Data

open access: yesComputer Sciences & Mathematics Forum, 2023
In this paper, we propose a non-parametric estimator of the conditional hazard function weighted on the recursive kernel method given an explanatory variable taking values in a semi-metric space when the scalar response is censored.
Hadjer Kebir, Boubaker Mechab
doaj   +1 more source

A Theory of Stochastic Harvesting in Stochastic Environments [PDF]

open access: yesThe American Naturalist, 2002
We investigate how model populations respond to stochastic harvesting in a stochastic environment. In particular, we show that the effects of variable harvesting on the variance in population density and yield depend critically on the autocorrelation of environmental noise and on whether the endogenous dynamics of the population display over- or ...
Jonzén, Niclas   +2 more
openaire   +3 more sources

Information Bottleneck Classification in Extremely Distributed Systems

open access: yesEntropy, 2020
We present a new decentralized classification system based on a distributed architecture. This system consists of distributed nodes, each possessing their own datasets and computing modules, along with a centralized server, which provides probes to ...
Denis Ullmann   +5 more
doaj   +1 more source

The distance spectrum of two new operations of graphs [PDF]

open access: yesTransactions on Combinatorics, 2020
Let $G$ be a connected graph with vertex set $V(G)=\{v_1, v_2,\ldots,v_n\}$‎. ‎The distance matrix $D=D(G)$ of $G$ is defined so that its $(i,j)$-entry is equal to the distance $d_G(v_i,v_j)$ between the vertices $v_i$ and $v_j$ of $G$‎. ‎The eigenvalues
Zikai Tang   +3 more
doaj   +1 more source

Local linear modelling of the conditional distribution function for functional ergodic data

open access: yesMathematical Modelling and Analysis, 2022
The focus of functional data analysis has been mostly on independent functional observations. It is therefore hoped that the present contribution will provide an informative account of a useful approach that merges the ideas of the ergodic theory and ...
Somia Ayad   +3 more
doaj   +1 more source

A posteriori error estimation for stochastic static problems [PDF]

open access: yes, 2014
To solve stochastic static field problems, a discretization by the Finite Element Method can be used. A system of equations is obtained with the unknowns (scalar potential at nodes for example) being random variables. To solve this stochastic system, the
MAC, Hung, CLENET, Stephane
core   +1 more source

Information‐Theoretic Scores for Bayesian Model Selection and Similarity Analysis: Concept and Application to a Groundwater Problem

open access: yesWater Resources Research, 2023
Bayesian model selection (BMS) and Bayesian model justifiability analysis (BMJ) provide a statistically rigorous framework for comparing competing models through the use of Bayesian model evidence (BME).
Maria Fernanda Morales Oreamuno   +2 more
doaj   +1 more source

A parsimonious parametrization of the Direct Sampling algorithm for multiple-point statistical simulations

open access: yesApplied Computing and Geosciences, 2022
Multiple-point statistics algorithms allow modeling spatial variability from training images. Among these techniques, the Direct Sampling (DS) algorithm has advanced capabilities, such as multivariate simulations, treatment of non-stationarity, multi ...
Przemysław Juda   +2 more
doaj   +1 more source

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