Search Results for author: Alexandra Gessner

Found 6 papers, 4 papers with code

Spatiotemporal modeling of European paleoclimate using doubly sparse Gaussian processes

no code implementations15 Nov 2022 Seth D. Axen, Alexandra Gessner, Christian Sommer, Nils Weitzel, Álvaro Tejero-Cantero

Paleoclimatology -- the study of past climate -- is relevant beyond climate science itself, such as in archaeology and anthropology for understanding past human dispersal.

Gaussian Processes

High-Dimensional Gaussian Process Inference with Derivatives

1 code implementation15 Feb 2021 Filip de Roos, Alexandra Gessner, Philipp Hennig

Although it is widely known that Gaussian processes can be conditioned on observations of the gradient, this functionality is of limited use due to the prohibitive computational cost of $\mathcal{O}(N^3 D^3)$ in data points $N$ and dimension $D$.

Gaussian Processes Vocal Bursts Intensity Prediction

Bayesian Quadrature on Riemannian Data Manifolds

1 code implementation12 Feb 2021 Christian Fröhlich, Alexandra Gessner, Philipp Hennig, Bernhard Schölkopf, Georgios Arvanitidis

Riemannian manifolds provide a principled way to model nonlinear geometric structure inherent in data.

Integrals over Gaussians under Linear Domain Constraints

2 code implementations21 Oct 2019 Alexandra Gessner, Oindrila Kanjilal, Philipp Hennig

Integrals of linearly constrained multivariate Gaussian densities are a frequent problem in machine learning and statistics, arising in tasks like generalized linear models and Bayesian optimization.

Bayesian Optimization

Active Multi-Information Source Bayesian Quadrature

no code implementations27 Mar 2019 Alexandra Gessner, Javier Gonzalez, Maren Mahsereci

Bayesian quadrature (BQ) is a sample-efficient probabilistic numerical method to solve integrals of expensive-to-evaluate black-box functions, yet so far, active BQ learning schemes focus merely on the integrand itself as information source, and do not allow for information transfer from cheaper, related functions.

Active Learning

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