Matches in SemOpenAlex for { <https://semopenalex.org/work/W4320031369> ?p ?o ?g. }
Showing items 1 to 81 of
81
with 100 items per page.
- W4320031369 abstract "The study of quasar light curves poses two problems: inference of the power spectrum and interpolation of an irregularly sampled time series. A baseline approach to these tasks is to interpolate a time series with a Damped Random Walk (DRW) model, in which the spectrum is inferred using Maximum Likelihood Estimation (MLE). However, the DRW model does not describe the smoothness of the time series, and MLE faces many problems in terms of optimization and numerical precision. In this work, we introduce a new stochastic model that we call $textit{Convolved Damped Random Walk}$ (CDRW). This model introduces a concept of smoothness to a DRW, which enables it to describe quasar spectra completely. We also introduce a new method of inference of Gaussian process parameters, which we call $textit{Neural Inference}$. This method uses the powers of state-of-the-art neural networks to improve the conventional MLE inference technique. In our experiments, the Neural Inference method results in significant improvement over the baseline MLE (RMSE: $0.318 rightarrow 0.205$, $0.464 rightarrow 0.444$). Moreover, the combination of both the CDRW model and Neural Inference significantly outperforms the baseline DRW and MLE in interpolating a typical quasar light curve ($chi^2$: $0.333 rightarrow 0.998$, $2.695 rightarrow 0.981$). The code is published on GitHub." @default.
- W4320031369 created "2023-02-12" @default.
- W4320031369 creator A5036614505 @default.
- W4320031369 creator A5072713551 @default.
- W4320031369 creator A5084374765 @default.
- W4320031369 date "2022-11-17" @default.
- W4320031369 modified "2023-09-28" @default.
- W4320031369 title "Neural Inference of Gaussian Processes for Time Series Data of Quasars" @default.
- W4320031369 doi "https://doi.org/10.48550/arxiv.2211.10305" @default.
- W4320031369 hasPublicationYear "2022" @default.
- W4320031369 type Work @default.
- W4320031369 citedByCount "0" @default.
- W4320031369 crossrefType "posted-content" @default.
- W4320031369 hasAuthorship W4320031369A5036614505 @default.
- W4320031369 hasAuthorship W4320031369A5072713551 @default.
- W4320031369 hasAuthorship W4320031369A5084374765 @default.
- W4320031369 hasBestOaLocation W43200313691 @default.
- W4320031369 hasConcept C102634674 @default.
- W4320031369 hasConcept C105795698 @default.
- W4320031369 hasConcept C11413529 @default.
- W4320031369 hasConcept C115961682 @default.
- W4320031369 hasConcept C121194460 @default.
- W4320031369 hasConcept C121332964 @default.
- W4320031369 hasConcept C134306372 @default.
- W4320031369 hasConcept C135041427 @default.
- W4320031369 hasConcept C137800194 @default.
- W4320031369 hasConcept C143724316 @default.
- W4320031369 hasConcept C151730666 @default.
- W4320031369 hasConcept C154945302 @default.
- W4320031369 hasConcept C163716315 @default.
- W4320031369 hasConcept C168110828 @default.
- W4320031369 hasConcept C2776214188 @default.
- W4320031369 hasConcept C28826006 @default.
- W4320031369 hasConcept C33923547 @default.
- W4320031369 hasConcept C41008148 @default.
- W4320031369 hasConcept C44870925 @default.
- W4320031369 hasConcept C50644808 @default.
- W4320031369 hasConcept C61326573 @default.
- W4320031369 hasConcept C62520636 @default.
- W4320031369 hasConcept C86803240 @default.
- W4320031369 hasConcept C98444146 @default.
- W4320031369 hasConceptScore W4320031369C102634674 @default.
- W4320031369 hasConceptScore W4320031369C105795698 @default.
- W4320031369 hasConceptScore W4320031369C11413529 @default.
- W4320031369 hasConceptScore W4320031369C115961682 @default.
- W4320031369 hasConceptScore W4320031369C121194460 @default.
- W4320031369 hasConceptScore W4320031369C121332964 @default.
- W4320031369 hasConceptScore W4320031369C134306372 @default.
- W4320031369 hasConceptScore W4320031369C135041427 @default.
- W4320031369 hasConceptScore W4320031369C137800194 @default.
- W4320031369 hasConceptScore W4320031369C143724316 @default.
- W4320031369 hasConceptScore W4320031369C151730666 @default.
- W4320031369 hasConceptScore W4320031369C154945302 @default.
- W4320031369 hasConceptScore W4320031369C163716315 @default.
- W4320031369 hasConceptScore W4320031369C168110828 @default.
- W4320031369 hasConceptScore W4320031369C2776214188 @default.
- W4320031369 hasConceptScore W4320031369C28826006 @default.
- W4320031369 hasConceptScore W4320031369C33923547 @default.
- W4320031369 hasConceptScore W4320031369C41008148 @default.
- W4320031369 hasConceptScore W4320031369C44870925 @default.
- W4320031369 hasConceptScore W4320031369C50644808 @default.
- W4320031369 hasConceptScore W4320031369C61326573 @default.
- W4320031369 hasConceptScore W4320031369C62520636 @default.
- W4320031369 hasConceptScore W4320031369C86803240 @default.
- W4320031369 hasConceptScore W4320031369C98444146 @default.
- W4320031369 hasLocation W43200313691 @default.
- W4320031369 hasOpenAccess W4320031369 @default.
- W4320031369 hasPrimaryLocation W43200313691 @default.
- W4320031369 hasRelatedWork W110925080 @default.
- W4320031369 hasRelatedWork W1482707769 @default.
- W4320031369 hasRelatedWork W1977123013 @default.
- W4320031369 hasRelatedWork W2075184575 @default.
- W4320031369 hasRelatedWork W2077893383 @default.
- W4320031369 hasRelatedWork W2080703211 @default.
- W4320031369 hasRelatedWork W2082127246 @default.
- W4320031369 hasRelatedWork W2088093866 @default.
- W4320031369 hasRelatedWork W2089553807 @default.
- W4320031369 hasRelatedWork W2109484508 @default.
- W4320031369 isParatext "false" @default.
- W4320031369 isRetracted "false" @default.
- W4320031369 workType "article" @default.