Joni
Virta
Assistant Professor, Statistics
Academy Research Fellow/Assistant Professor
Robust non-linear multivariate methods

Contact

+358 29 450 4321
+358 50 350 9623

Links

ORCID

Areas of expertise

Dimension reduction
Multivariate statistics
Asymptotic statistics

Biography

I obtained my PhD in Statistics from University of Turku in 2018 under the supervision of Hannu Oja, Klaus Nordhausen and Bing Li. In 2018-2019 I worked as a postdoctoral researcher in the Department of Mathematics and Systems Analysis in Aalto University School of Science and received also the title of docent from there. Between 2019-2022 I worked as an Academy of Finland Postdoctoral Researcher first in Aalto and later in Turku.

Since September 2022 I have been working at Department of Mathematics in the dual role of Academy Research Fellow and Assistant Professor (with specialization in the theoretical foundations of statistics).

Teaching

Between 2022-2027 my amount of teaching will be small because of my role as an Academy Research Fellow. However, I still teach, e.g, Advanced Multivariate Methods during this period.

Research

My current main research area is robust non-linear methodology, which I study under my Academy Research Fellow project. In addition, my research emphasizes the modification of classical multivariate methodology (such as PCA) to work under non-standard forms of data (images, function, spatial data) and the asymptotic theory related to these questions.

Publications

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Spatial Blind Source Separation (2020)

Biometrika
Bachoc François, Genton Marc G., Nordhausen Klaus, Ruiz-Gazen Anne, Virta Joni
(Vertaisarvioitu alkuperäisartikkeli tai data-artikkeli tieteellisessä aikakauslehdessä (A1))

On the number of signals in multivariate time series (2018)

International Conference on Latent Variable Analysis and Signal Separation, Lecture Notes in Computer Science
Markus Matilainen, Klaus Nordhausen, Joni Virta
(Vertaisarvioitu artikkeli konferenssijulkaisussa (A4))

JADE for Tensor-Valued Observations (2018)

Journal of Computational and Graphical Statistics
Joni Virta, Bing Li, Klaus Nordhausen, Hannu Oja
(Vertaisarvioitu alkuperäisartikkeli tai data-artikkeli tieteellisessä aikakauslehdessä (A1))

The squared symmetric FastICA estimator (2017)

Signal Processing
Miettinen J, Nordhausen K, Oja H, Taskinen S, Virta J
(Vertaisarvioitu alkuperäisartikkeli tai data-artikkeli tieteellisessä aikakauslehdessä (A1))
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