Detail publikace

Machine Learning Method for Changepoint Detection in Short Time Series Data

SMEJKALOVÁ, V. ŠOMPLÁK, R. ROSECKÝ, M. ŠRAMKOVÁ, K.

Originální název

Machine Learning Method for Changepoint Detection in Short Time Series Data

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

Analysis of data is crucial in waste management to improve effective planning from both short- and long-term perspectives. Real-world data often presents anomalies, but in the waste management sector, anomaly detection is seldom performed. The main goal and contribution of this paper is a proposal of a complex machine learning framework for changepoint detection in a large number of short time series from waste management. In such a case, it is not possible to use only an expert-based approach due to the time-consuming nature of this process and subjectivity. The proposed framework consists of two steps: (1) outlier detection via outlier test for trend-adjusted data, and (2) changepoints are identified via comparison of linear model parameters. In order to use the proposed method, it is necessary to have a sufficient number of experts’ assessments of the presence of anomalies in time series. The proposed framework is demonstrated on waste management data from the Czech Republic. It is observed that certain waste categories in specific regions frequently exhibit changepoints. On the micro-regional level, approximately 31.1% of time series contain at least one outlier and 16.4% exhibit changepoints. Certain groups of waste are more prone to the occurrence of anomalies. The results indicate that even in the case of aggregated data, anomalies are not rare, and their presence should always be checked.

Klíčová slova

machine learning for time series; waste generation; short time series; anomaly detection; outlier; changepoint

Autoři

SMEJKALOVÁ, V.; ŠOMPLÁK, R.; ROSECKÝ, M.; ŠRAMKOVÁ, K.

Vydáno

5. 10. 2023

Nakladatel

MDPI

ISSN

2504-4990

Periodikum

Machine Learning and Knowledge Extraction

Ročník

5

Číslo

4

Stát

Švýcarská konfederace

Strany od

1407

Strany do

1432

Strany počet

26

URL

https://www.mdpi.com/2504-4990/5/4/71

Plný text v Digitální knihovně

http://hdl.handle.net/11012/245096

BibTex

@article{BUT186887,
  author="Veronika {Smejkalová} and Radovan {Šomplák} and Martin {Rosecký} and Kristína {Šramková}",
  title="Machine Learning Method for Changepoint Detection in Short Time Series Data",
  journal="Machine Learning and Knowledge Extraction",
  year="2023",
  volume="5",
  number="4",
  pages="1407--1432",
  doi="10.3390/make5040071",
  issn="2504-4990",
  url="https://www.mdpi.com/2504-4990/5/4/71"
}