Search Results for author: Chris Cornelis

Found 18 papers, 4 papers with code

Fuzzy Rough Choquet Distances for Classification

no code implementations18 Mar 2024 Adnan Theerens, Chris Cornelis

This paper introduces a novel Choquet distance using fuzzy rough set based measures.

Attribute Classification

FRRI: a novel algorithm for fuzzy-rough rule induction

no code implementations7 Mar 2024 Henri Bollaert, Marko Palangetić, Chris Cornelis, Salvatore Greco, Roman Słowiński

In this paper, we introduce a novel rule induction algorithm called Fuzzy Rough Rule Induction (FRRI).

On the Granular Representation of Fuzzy Quantifier-Based Fuzzy Rough Sets

no code implementations27 Dec 2023 Adnan Theerens, Chris Cornelis

The main findings reveal that Choquet-based fuzzy rough sets can be represented granularly under the same conditions as OWA-based fuzzy rough sets, whereas Sugeno-based FRS can always be represented granularly.

A unified weighting framework for evaluating nearest neighbour classification

no code implementations28 Nov 2023 Oliver Urs Lenz, Henri Bollaert, Chris Cornelis

NN and FRNN perform best with a combination of Samworth rank- and distance weights and scaling by the mean absolute deviation around the median ($r_1$), the standard deviaton ($r_2$) or the interquartile range ($r_{\infty}^*$), while FNN performs best with only Samworth distance-weights and $r_1$- or $r_2$-scaling.

Classification Negation

Classifying token frequencies using angular Minkowski $p$-distance

no code implementations25 Sep 2023 Oliver Urs Lenz, Chris Cornelis

Angular Minkowski $p$-distance is a dissimilarity measure that is obtained by replacing Euclidean distance in the definition of cosine dissimilarity with other Minkowski $p$-distances.

Fuzzy Rough Sets Based on Fuzzy Quantification

no code implementations6 Dec 2022 Adnan Theerens, Chris Cornelis

In this paper, we improve on VQFRS by introducing fuzzy quantifier-based fuzzy rough sets (FQFRS), an intuitive generalization of fuzzy rough sets that makes use of general unary and binary quantification models.

Binary Quantification

Evaluation of the impact of the indiscernibility relation on the fuzzy-rough nearest neighbours algorithm

no code implementations25 Nov 2022 Henri Bollaert, Chris Cornelis

In this paper, we investigate the impact of this indiscernibility relation on the performance of FRNN classification.

Classification Metric Learning +1

Polar Encoding: A Simple Baseline Approach for Classification with Missing Values

no code implementations4 Oct 2022 Oliver Urs Lenz, Daniel Peralta, Chris Cornelis

We propose polar encoding, a representation of categorical and numerical $[0, 1]$-valued attributes with missing values to be used in a classification context.

Attribute Denoising +1

No imputation without representation

no code implementations28 Jun 2022 Oliver Urs Lenz, Daniel Peralta, Chris Cornelis

Imputation allows datasets to be used with algorithms that cannot handle missing values by themselves.

Imputation

Fuzzy granular approximation classifier

1 code implementation2 Jun 2022 Marko Palangetić, Chris Cornelis, Salvatore Greco, Roman Słowiński

At the end, we discuss the transparency of the FGAC and its advantage over other locally transparent methods.

Binary Classification Classification +1

Choquet-Based Fuzzy Rough Sets

no code implementations22 Feb 2022 Adnan Theerens, Oliver Urs Lenz, Chris Cornelis

In classical fuzzy rough sets, the lower and upper approximations are determined using the minimum and maximum operators, respectively.

BIG-bench Machine Learning Outlier Detection

Multi-class granular approximation by means of disjoint and adjacent fuzzy granules

no code implementations15 Feb 2022 Marko Palangetić, Chris Cornelis, Salvatore Greco, Roman Słowiński

In granular computing, fuzzy sets can be approximated by granularly representable sets that are as close as possible to the original fuzzy set w. r. t.

Attribute Binary Classification +1

A Novel Machine Learning Approach to Data Inconsistency with respect to a Fuzzy Relation

no code implementations26 Nov 2021 Marko Palangetić, Chris Cornelis, Salvatore Greco, Roman Słowiński

Inconsistency in prediction problems occurs when instances that relate in a certain way on condition attributes, do not follow the same relation on the decision attribute.

Attribute BIG-bench Machine Learning +2

Fuzzy-Rough Nearest Neighbour Approaches for Emotion Detection in Tweets

1 code implementation8 Jul 2021 Olha Kaminska, Chris Cornelis, Veronique Hoste

Social media are an essential source of meaningful data that can be used in different tasks such as sentiment analysis and emotion recognition.

Emotion Recognition Sentiment Analysis

Nearest neighbour approaches for Emotion Detection in Tweets

1 code implementation EACL (WASSA) 2021 Olha Kaminska, Chris Cornelis, Veronique Hoste

Emotion detection is an important task that can be applied to social media data to discover new knowledge.

Optimised one-class classification performance

no code implementations4 Feb 2021 Oliver Urs Lenz, Daniel Peralta, Chris Cornelis

The hyperparameters of SVM and LOF have to be optimised through cross-validation, while NND, LNND and ALP allow an efficient form of leave-one-out validation and the reuse of a single nearest-neighbour query.

Classification General Classification +1

Average Localised Proximity: A new data descriptor with good default one-class classification performance

no code implementations26 Jan 2021 Oliver Urs Lenz, Daniel Peralta, Chris Cornelis

One-class classification is a challenging subfield of machine learning in which so-called data descriptors are used to predict membership of a class based solely on positive examples of that class, and no counter-examples.

Classification General Classification +1

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