Search Results for author: Andrés F. López-Lopera

Found 8 papers, 5 papers with code

Gaussian Process Modulated Cox Processes under Linear Inequality Constraints

no code implementations28 Feb 2019 Andrés F. López-Lopera, ST John, Nicolas Durrande

We introduce a novel finite approximation of GP-modulated Cox processes where positiveness conditions can be imposed directly on the GP, with no restrictions on the covariance function.

Point Processes

Approximating Gaussian Process Emulators with Linear Inequality Constraints and Noisy Observations via MC and MCMC

no code implementations15 Jan 2019 Andrés F. López-Lopera, François Bachoc, Nicolas Durrande, Jérémy Rohmer, Déborah Idier, Olivier Roustant

Finally, on 2D and 5D coastal flooding applications, we show that more flexible and realistic GP implementations can be obtained by considering noise effects and by enforcing the (linear) inequality constraints.

Gaussian Processes

Physically-Inspired Gaussian Process Models for Post-Transcriptional Regulation in Drosophila

1 code implementation29 Aug 2018 Andrés F. López-Lopera, Nicolas Durrande, Mauricio A. Alvarez

Since the post-transcriptional regulation of Drosophila depends on spatiotemporal interactions between mRNAs and gap proteins, proper physically-inspired stochastic models are required to study the link between both quantities.

Gaussian Processes

Maximum likelihood estimation for Gaussian processes under inequality constraints

1 code implementation10 Apr 2018 François Bachoc, Agnès Lagnoux, Andrés F. López-Lopera

We first show that the (unconstrained) maximum likelihood estimator has the same asymptotic distribution, unconditionally and conditionally, to the fact that the Gaussian process satisfies the inequality constraints.

Statistics Theory Probability Statistics Theory

Finite-dimensional Gaussian approximation with linear inequality constraints

1 code implementation20 Oct 2017 Andrés F. López-Lopera, François Bachoc, Nicolas Durrande, Olivier Roustant

Introducing inequality constraints in Gaussian process (GP) models can lead to more realistic uncertainties in learning a great variety of real-world problems.

Uncertainty Quantification

Switched latent force models for reverse-engineering transcriptional regulation in gene expression data

1 code implementation23 Nov 2015 Andrés F. López-Lopera, Mauricio A. Álvarez

To survive environmental conditions, cells transcribe their response activities into encoded mRNA sequences in order to produce certain amounts of protein concentrations.

Sparse Linear Models applied to Power Quality Disturbance Classification

no code implementations23 Nov 2015 Andrés F. López-Lopera, Mauricio A. Álvarez, Ávaro A. Orozco

The automatic recognition of PQ disturbances can be seen as a pattern recognition problem, in which different types of waveform distortion are differentiated based on their features.

Classification General Classification

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