Joni Virta
Academy Research Fellow/Assistant Professor
jomivi@utu.fi +358 29 450 4321 +358 50 350 9623 : 262 |
Dimension reduction; Multivariate statistics; Asymptotic statistics
Robust non-linear multivariate methods
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).
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.
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.
- A method for sparse and robust independent component analysis (2026)
- Journal of Multivariate Analysis
- Spatial depth for data in metric spaces (2026)
- Scandinavian Journal of Statistics
- Unsupervised linear discrimination using skewness (2026)
- Journal of Multivariate Analysis
- Dimension estimation in a spiked covariance model using high-dimensional data augmentation (2025)
- Biometrika
- ICS for multivariate functional anomaly detection with applications to predictive maintenance and quality control (2025)
- Econometrics and Statistics
- Kurtosis-based projection pursuit for matrix-valued data (2025)
- Annals of Statistics
- Measure of shape for object data (2025)
- Journal of Nonparametric Statistics
- Methods for Generating and Evaluating Synthetic Longitudinal Patient Data: A Systematic Review (2025)
- Journal of Healthcare Informatics Research
- On the distribution of isometric log-ratio coordinates under extra-multinomial count data (2025)
- Statistical Papers
- Order Determination for Tensor-Valued Observations Using Data Augmentation (2025)
- Journal of Computational and Graphical Statistics
- Projection-based estimators for matrix/tensor-valued data (2025)
- Scandinavian Journal of Statistics
- Quince seed mucilage as an alternative for agar in plant tissue culture (2025)
- Discover Plants
- Weighted embedding and outlier detection of metric space data (2025)
- Advances in Data Analysis and Classification
- When Does Centrality Matter for Portfolio Selection? (2025) Rihtamo, Roope; Saarinen, Harto; Nyberg, Henri; Virta, Joni
- Asymptotic Utility of Spectral Anonymization (2024)
- Lecture Notes in Computer Science
- Large-sample properties of non-stationary source separation for Gaussian signals (2024)
- Electronic Journal of Statistics
- Latent model extreme value index estimation (2024)
- Journal of Multivariate Analysis
- Robust signal dimension estimation via SURE (2024)
- Statistical Papers
- Structure-preserving non-linear PCA for matrices (2024)
- IEEE Transactions on Signal Processing
- Poisson PCA for matrix count data (2023)
- Pattern Recognition



