Search Results for author: Henrik Boström

Found 11 papers, 5 papers with code

Bounding the Expected Robustness of Graph Neural Networks Subject to Node Feature Attacks

1 code implementation27 Apr 2024 Yassine Abbahaddou, Sofiane Ennadir, Johannes F. Lutzeyer, Michalis Vazirgiannis, Henrik Boström

In this work, we theoretically define the concept of expected robustness in the context of attributed graphs and relate it to the classical definition of adversarial robustness in the graph representation learning literature.

A Simple and Yet Fairly Effective Defense for Graph Neural Networks

1 code implementation21 Feb 2024 Sofiane Ennadir, Yassine Abbahaddou, Johannes F. Lutzeyer, Michalis Vazirgiannis, Henrik Boström

Successful combinations of our NoisyGNN approach with existing defense techniques demonstrate even further improved adversarial defense results.

Adversarial Defense Node Classification

Example-Based Explanations of Random Forest Predictions

no code implementations24 Nov 2023 Henrik Boström

A random forest prediction can be computed by the scalar product of the labels of the training examples and a set of weights that are determined by the leafs of the forest into which the test object falls; each prediction can hence be explained exactly by the set of training examples for which the weights are non-zero.

Approximating Score-based Explanation Techniques Using Conformal Regression

no code implementations23 Aug 2023 Amr AlKhatib, Henrik Boström, Sofiane Ennadir, Ulf Johansson

The results also suggest that the proposed method can produce tight intervals, while providing validity guarantees.

Conformal Prediction regression

Image Keypoint Matching using Graph Neural Networks

no code implementations27 May 2022 Nancy Xu, Giannis Nikolentzos, Michalis Vazirgiannis, Henrik Boström

Image matching is a key component of many tasks in computer vision and its main objective is to find correspondences between features extracted from different natural images.

Graph Matching

Towards interpretability of Mixtures of Hidden Markov Models

no code implementations23 Mar 2021 Negar Safinianaini, Henrik Boström

Mixtures of Hidden Markov Models (MHMMs) are frequently used for clustering of sequential data.

Clustering

A study of data and label shift in the LIME framework

no code implementations31 Oct 2019 Amir Hossein Akhavan Rahnama, Henrik Boström

LIME is a popular approach for explaining a black-box prediction through an interpretable model that is trained on instances in the vicinity of the predicted instance.

object-detection Object Detection +2

Block-distributed Gradient Boosted Trees

no code implementations23 Apr 2019 Theodore Vasiloudis, Hyunsu Cho, Henrik Boström

As a result, we are able to reduce the training time for high-dimensional data, and allow more cost-effective scale-out without the need for expensive network communication.

Click-Through Rate Prediction Learning-To-Rank

Clustering with Confidence: Finding Clusters with Statistical Guarantees

1 code implementation27 Dec 2016 Andreas Henelius, Kai Puolamäki, Henrik Boström, Panagiotis Papapetrou

In this study, we propose a technique for quantifying the instability of a clustering solution and for finding robust clusters, termed core clusters, which correspond to clusters where the co-occurrence probability of each data item within a cluster is at least $1 - \alpha$.

Clustering

Cannot find the paper you are looking for? You can Submit a new open access paper.