Search Results for author: Antti Airola

Found 14 papers, 2 papers with code

Empirical investigation of multi-source cross-validation in clinical machine learning

no code implementations22 Mar 2024 Tuija Leinonen, David Wong, Ali Wahab, Ramesh Nadarajah, Matti Kaisti, Antti Airola

However, such estimates tend to be highly overoptimistic when compared to accuracy obtained from deploying models to sources not represented in the dataset, such as a new hospital.

Does Differentially Private Synthetic Data Lead to Synthetic Discoveries?

no code implementations20 Mar 2024 Ileana Montoya Perez, Parisa Movahedi, Valtteri Nieminen, Antti Airola, Tapio Pahikkala

Objectives: The aim of this study is to evaluate the Mann-Whitney U test on DP-synthetic biomedical data in terms of Type I and Type II errors, in order to establish whether statistical hypothesis testing performed on privacy preserving synthetic data is likely to lead to loss of test's validity or decreased power.

Privacy Preserving Synthetic Data Generation

Training neural networks with synthetic electrocardiograms

no code implementations11 Nov 2021 Matti Kaisti, Juho Laitala, Antti Airola

By allowing the randomization to increase beyond what is typically observed in the real-world data the performance is on par or superseding the performance of networks trained with real data.

A Link between Coding Theory and Cross-Validation with Applications

no code implementations22 Mar 2021 Tapio Pahikkala, Parisa Movahedi, Ileana Montoya, Havu Miikonen, Stephan Foldes, Antti Airola, Laszlo Major

We show that the maximal number of classification problems with fixed class proportion, for which a learning algorithm can achieve zero LPOCV error, equals the maximal number of code words in a constant weight code (CWC), with certain technical properties.

Binary Classification

Generalized vec trick for fast learning of pairwise kernel models

1 code implementation2 Sep 2020 Markus Viljanen, Antti Airola, Tapio Pahikkala

Pairwise learning corresponds to the supervised learning setting where the goal is to make predictions for pairs of objects.

Metric Learning

Playtime Measurement with Survival Analysis

no code implementations4 Jan 2017 Markus Viljanen, Antti Airola, Jukka Heikkonen, Tapio Pahikkala

Throughout this paper, we illustrate the application of these methods to real world game development problems on the Hipster Sheep mobile game.

Survival Analysis

Efficient Pairwise Learning Using Kernel Ridge Regression: an Exact Two-Step Method

no code implementations14 Jun 2016 Michiel Stock, Tapio Pahikkala, Antti Airola, Bernard De Baets, Willem Waegeman

In this work we analyze kernel-based methods for pairwise learning, with a particular focus on a recently-suggested two-step method.

Collaborative Filtering Matrix Completion +3

Fast Kronecker product kernel methods via generalized vec trick

no code implementations7 Jan 2016 Antti Airola, Tapio Pahikkala

Kronecker product kernel provides the standard approach in the kernel methods literature for learning from graph data, where edges are labeled and both start and end vertices have their own feature representations.

Collaborative Filtering Information Retrieval +1

Spectral Analysis of Symmetric and Anti-Symmetric Pairwise Kernels

no code implementations19 Jun 2015 Tapio Pahikkala, Markus Viljanen, Antti Airola, Willem Waegeman

We consider the problem of learning regression functions from pairwise data when there exists prior knowledge that the relation to be learned is symmetric or anti-symmetric.

regression

Identification of functionally related enzymes by learning-to-rank methods

no code implementations17 May 2014 Michiel Stock, Thomas Fober, Eyke Hüllermeier, Serghei Glinca, Gerhard Klebe, Tapio Pahikkala, Antti Airola, Bernard De Baets, Willem Waegeman

For a given query, the search operation results in a ranking of the enzymes in the database, from very similar to dissimilar enzymes, while information about the biological function of annotated database enzymes is ignored.

Learning-To-Rank

Efficient Regularized Least-Squares Algorithms for Conditional Ranking on Relational Data

no code implementations21 Sep 2012 Tapio Pahikkala, Antti Airola, Michiel Stock, Bernard De Baets, Willem Waegeman

In domains like bioinformatics, information retrieval and social network analysis, one can find learning tasks where the goal consists of inferring a ranking of objects, conditioned on a particular target object.

Computational Efficiency Information Retrieval +2

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