Koen Smets

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The Odd One Out: Identifying and Characterising Anomalies

In many situations there exists an abundance of positive examples, but only a handful of negatives. In this paper we show how in binary or transaction data such rare cases can be identified and… (More)

Automatic Vandalism Detection in Wikipedia : Towards a Machine Learning Approach

Koen Smets, Bart Goethals, Brigitte Verdonk
2008

Since the end of 2006 several autonomous bots are, or have been, running on Wikipedia to keep the encyclopedia free from vandalism and other damaging edits. These expert systems, however, are far… (More)

Slim: Directly Mining Descriptive Patterns

Mining small, useful, and high-quality sets of patterns has recently become an important topic in data mining. The standard approach is to first mine many candidates, and then to select a good… (More)

Evaluation of Performance Measures for SVR Hyperparameter Selection

Koen Smets, Brigitte Verdonk, Elsa M. Jordaan
2007 International Joint Conference on Neural…
2007

To obtain accurate modeling results, it is of primal importance to find optimal values for the hyperparameters in the Support Vector Regression (SVR) model. In general, we search for those parameters… (More)

Aminoterminal Propeptide of Type III Procollagen in Cord Blood and Amniotic Fluid of High-Risk Pregnancies: A Biochemical Approach to the Dynamic Assessment of Deviant Fetal Growth

Piet Vanhaesebrouck, Jos Kint, +4 authors Jules Gerard Leroy
Pediatric Research
1994

ABSTRACT: N-terminal propeptide of type III procollagen (PIIINP) concentration was measured in cord serum, amniotic fluid, and maternal serum from high-risk pregnancies. The fetal PIIINP variability… (More)

Discovering novelty in spatio/temporal data using one-class support vector machines

Koen Smets, Brigitte Verdonk, Elsa M. Jordaan
2009 International Joint Conference on Neural…
2009

Novelty or anomaly detection in spatio/temporal data refers to the automatic identification of novel or abnormal events embedded in data that occur at a specific location/time. Traditional techniques… (More)

Rapeseed and Raspberry Seed Cakes as Inexpensive Raw Materials in the Production of Activated Carbon by Physical Activation: Effect of Activation Conditions on Textural and Phenol Adsorption…

Koen Smets, Mats De Jong, +4 authors Jan Yperman
Materials
2016

The production of activated carbons (ACs) from rapeseed cake and raspberry seed cake using slow pyrolysis followed by physical activation of the obtained solid residues is the topic of this study.… (More)

Chondrodysplasia punctata with multiple congenital anomalies: a new syndrome?

Geert R. Mortier, Ludwine M Messiaen, +4 authors Anne De Paepe
Pediatric Radiology
1998

We report a male neonate with craniofacial dysmorphic features, multiple congenital anomalies and an unusual form of chondrodysplasia punctata. Radiographic examination revealed punctate epiphyses… (More)

Platinum particle size and support effects in NO(x) mediated carbon oxidation over platinum catalysts.

Kenneth Villani, Walter Vermandel, Koen Smets, Duoduo Liang, Gustaaf Van Tendeloo, Johan Adriaan Martens
Environmental science & technology
2006

Platinum metal was dispersed on microporous, mesoporous, and nonporous support materials including the zeolites Na-Y, Ba-Y, Ferrierite, ZSM-22, ETS-10, and AIPO-11, alumina, and titania. The… (More)

An integrated workflow for robust alignment and simplified quantitative analysis of NMR spectrometry data

Trung-Nghia Vu, Dirk Valkenborg, +6 authors Kris Laukens
BMC Bioinformatics
2011

Nuclear magnetic resonance spectroscopy (NMR) is a powerful technique to reveal and compare quantitative metabolic profiles of biological tissues. However, chemical and physical sample variations… (More)

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