Search Results for author: Diego Marcondes

Found 12 papers, 2 papers with code

Metastable Financial Markets

no code implementations19 Oct 2023 Diego Marcondes, Adilson Simonis

Metastability is a phenomenon observed in stochastic systems which stay in a false-equilibrium within a region of its state space until the occurrence of a sequence of rare events that leads to an abrupt transition to a different region.

Causal Inference Time Series

An Algorithm to Train Unrestricted Sequential Discrete Morphological Neural Networks

1 code implementation6 Oct 2023 Diego Marcondes, Mariana Feldman, Junior Barrera

We also proposed a stochastic lattice descent algorithm (SLDA) to learn the parameters of Canonical Discrete Morphological Neural Networks (CDMNN), whose architecture is composed only of operators that can be decomposed as the supremum, infimum, and complement of erosions and dilations.

Discrete Morphological Neural Networks

1 code implementation1 Sep 2023 Diego Marcondes, Junior Barrera

We propose the Discrete Morphological Neural Networks (DMNN) for binary image analysis to represent W-operators and estimate them via machine learning.

Distribution-free Deviation Bounds of Learning via Model Selection with Cross-validation Risk Estimation

no code implementations15 Mar 2023 Diego Marcondes, Cláudia Peixoto

Cross-validation techniques for risk estimation and model selection are widely used in statistics and machine learning.

Learning Theory Model Selection

The role of prior information and computational power in Machine Learning

no code implementations31 Oct 2022 Diego Marcondes, Adilson Simonis, Junior Barrera

Science consists on conceiving hypotheses, confronting them with empirical evidence, and keeping only hypotheses which have not yet been falsified.

Learning the hypotheses space from data through a U-curve algorithm

no code implementations8 Sep 2021 Diego Marcondes, Adilson Simonis, Junior Barrera

This paper proposes a data-driven systematic, consistent and non-exhaustive approach to Model Selection, that is an extension of the classical agnostic PAC learning model.

Model Selection PAC learning

Parameter estimation in dynamical systems via Statistical Learning: a reinterpretation of Approximate Bayesian Computation applied to COVID-19 spread

no code implementations28 Jul 2020 Diego Marcondes

We propose a robust parameter estimation method for dynamical systems based on Statistical Learning techniques which aims to estimate a set of parameters that well fit the dynamics in order to obtain robust evidences about the qualitative behaviour of its trajectory.

Learning the Hypotheses Space from data Part II: Convergence and Feasibility

no code implementations30 Jan 2020 Diego Marcondes, Adilson Simonis, Junior Barrera

In this paper, we carry further our agenda, by showing the consistency of a model selection framework based on Learning Spaces, in which one selects from data the Hypotheses Space on which to learn.

Model Selection

Learning the Hypotheses Space from data: Learning Space and U-curve Property

no code implementations26 Jan 2020 Diego Marcondes, Adilson Simonis, Junior Barrera

A remarkable, formally proved, consequence of this approach are conditions on $\mathbb{L}(\mathcal{H})$ and on the loss function that lead to estimated out-of-sample error surfaces which are true U-curves on $\mathbb{L}(\mathcal{H})$ chains, enabling a more efficient search on $\mathbb{L}(\mathcal{H})$.

Model Selection Neural Architecture Search +1

A survey of a hurdle model for heavy-tailed data based on the generalized lambda distribution

no code implementations6 Dec 2017 Diego Marcondes, Cláudia Peixoto, Ana Carolina Maia

In this survey we present an extensive research of the vast literature about the Generalized Lambda Distribution (GLD) and propose a hurdle, or two-way, model whose associated distribution is the GLD in order to meet the demand for a highly flexible model of heavy-tailed data with excess of zeros.

Applications 62P05

Feature Selection based on the Local Lift Dependence Scale

no code implementations11 Nov 2017 Diego Marcondes, Adilson Simonis, Junior Barrera

The main contribution of this paper is to define and apply this local measure, which permits to analyse local properties of joint distributions that are neglected by the classical Shanon's global measure.

feature selection

Cannot find the paper you are looking for? You can Submit a new open access paper.