SGR: A New Kernel for Outlier Detection in Multi-variate Sensor Data

Name: SGR: A New Kernel for Outlier Detection in Multi-variate Sensor Data
Brand: LAP Lambert Academic Publishing
SKU: 9786202022965
Price: 984 CZK
Availability: InStock

Autor: Seema Sharma

Jazyk:

Vazba: Brožovaná

Vydavatel: LAP Lambert Academic Publishing

Dostupnost: Skladem u dodavatele

Odesíláme za 5-8 dnů

984 Kč

Approaches of identifying outliers based on prior knowledge of data distribution are generally inade...

Informace o knize

Autor

Seema Sharma

Jazyk

Angličtina

Vazba

Kniha - Brožovaná

Vydáno

2017

Stránek

EAN

9786202022965

Enbook ID

18311858

Vydavatel

LAP Lambert Academic Publishing

Hmotnost

155

Rozměry

150 x 220 x 6

Kompletní popis

Approaches of identifying outliers based on prior knowledge of data distribution are generally inadequate. Density estimation using a kernel function is a non-parametric approach that does not require prior knowledge of the data distribution. The technique has been studied widely and several kernel density based outlier detection algorithms have been proposed. However, most of the work in the field is applying the technique on univariate data. In multivariate data, co-relation between different fields requires special techniques. Here, we present a new kernel for estimating the density in multivariate data space. Our kernel is more efficient to the known kernels as it has lowest MISE among the available kernel functions. Our algorithm employs Mahalanobis Distance as a metric. This ensures that the co-relation between the variables is accounted for while estimating the density. The proposed algorithm is a two step process in which density is computed in the first step. Based on the density estimates, Local Outlier Factor is assigned as measure of outlierness of the points. Finally, the points with an absolute Z-score of greater than or equal to three are classified as outliers.

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SGR: A New Kernel for Outlier Detection in Multi-variate Sensor Data

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