Overview

Xiaoyu is a Postdoctoral Research Fellow in the Department of Mathematics and Statistics at the University of Exeter. Her research interests focus on using statistical and machine learning models as a tool for solving problems in the real world, such as making better decisions under uncertainty or answering questions about processes we have data for, whilst taking account of the accuracy, efficiency and scalability of the models. She specialises in Gaussian processes (GPs) modelling, uncertainty quantification (UQ) and their applications.

Xiaoyu currently works in a project investigating UQ methods for propagating and quantifying uncertainty in hierarchies of numerical codes. Between Feb 2021 and Oct 2022, she worked in the ‘Uncertainty Quantification for Expensive COVID-19 Simulation Models’ project, where she used GP emulator and history matching to calibrate a high-resolution spatial Covid-19 simulation model in real-time to enable fast high-resolution forecasts of Covid-19 spread with accurate uncertainty in real-time and under policy interventions. Between Dec 2017 and Jan 2021, she worked in the project ‘Big data methods for improving windstorm footprint prediction (BigFoot)’, where she developed data blending frameworks based on GPs for improved wind gust speed prediction accuracy.

Xiaoyu received her PhD in Computing Science (Machine Learning) in 2017 from the University of Glasgow. The topic of her PhD was Adaptive Multiple Importance Sampling for Gaussian processes.

https://orcid.org/0000-0003-3567-8965

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Publications

_{Copyright Notice: Any articles made available for download are for personal use only. Any other use requires prior permission of the author and the copyright holder.}

| 2021 | 2018 | 2017 | 2016 |

2021

• Challen R, Dyson L, Overton CE, Guzman-Rincon LM, Hill EM, Stage HB, Brooks-Pollock E, Pellis L, Scarabel F, Pascall DJ. (2021) Early epidemiological signatures of novel SARS-CoV-2 variants: establishment of B.1.617.2 in England, DOI:10.1101/2021.06.05.21258365.
• Xiong X, Youngman BD, Economou T. (2021) Data fusion with Gaussian processes for estimation of environmental hazard events, Environmetrics, volume 32, no. 3, DOI:10.1002/env.2660.

2018

• Morrison A, Xiong X, Higgs M, Bell M, Chalmers M. (2018) A Large-Scale Study of iPhone App Launch Behaviour, CHI '18: CHI Conference on Human Factors in Computing Systems, Proceedings of the 2018 CHI Conference on Human Factors in Computing Systems, DOI:10.1145/3173574.3173918. [PDF]
• Fang A, Habel P, Ounis I, Xiong X, MacDonald C, Yu HT. (2018) An effective approach for modelling time features for classifying bursty topics on twitter, International Conference on Information and Knowledge Management, Proceedings, pages 1547-1550, DOI:10.1145/3269206.3269253.

2017

• Xiong X, Šmídl V, Filippone M. (2017) Adaptive multiple importance sampling for Gaussian processes, Journal of Statistical Computation and Simulation, volume 87, no. 8, pages 1644-1665, DOI:10.1080/00949655.2017.1280037. [PDF]

2016

• Xiong X, Filippone M, Vinciarelli A. (2016) Looking Good With Flickr Faves, MM '16: ACM Multimedia Conference, Proceedings of the 24th ACM international conference on Multimedia, DOI:10.1145/2964284.2967253. [PDF]

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