Time Series Analysis Methods and Applications for Flight Data

Author(s):  
Jianye Zhang ◽  
Peng Zhang
2013 ◽  
Vol 10 (83) ◽  
pp. 20130048 ◽  
Author(s):  
Ben D. Fulcher ◽  
Max A. Little ◽  
Nick S. Jones

The process of collecting and organizing sets of observations represents a common theme throughout the history of science. However, despite the ubiquity of scientists measuring, recording and analysing the dynamics of different processes, an extensive organization of scientific time-series data and analysis methods has never been performed. Addressing this, annotated collections of over 35 000 real-world and model-generated time series, and over 9000 time-series analysis algorithms are analysed in this work. We introduce reduced representations of both time series, in terms of their properties measured by diverse scientific methods, and of time-series analysis methods, in terms of their behaviour on empirical time series, and use them to organize these interdisciplinary resources. This new approach to comparing across diverse scientific data and methods allows us to organize time-series datasets automatically according to their properties, retrieve alternatives to particular analysis methods developed in other scientific disciplines and automate the selection of useful methods for time-series classification and regression tasks. The broad scientific utility of these tools is demonstrated on datasets of electroencephalograms, self-affine time series, heartbeat intervals, speech signals and others, in each case contributing novel analysis techniques to the existing literature. Highly comparative techniques that compare across an interdisciplinary literature can thus be used to guide more focused research in time-series analysis for applications across the scientific disciplines.


2021 ◽  
Author(s):  
Steven Kemp ◽  
David Buil-Gil ◽  
Asier Moneva ◽  
Fernando Miró-Llinares ◽  
Nacho Díaz-Castaño

There have been many warnings about the rising threat of cybercrime and fraud resulting from the COVID-19 lockdown measures and the associated increase in Internet use. However, there is still relatively little data with which to support the alerts and any changes may be nuanced. The present paper applies time series analysis methods to historical data on cybercrime and fraud reported to Action Fraud in the UK to examine whether any potential increases are beyond normal crime variability. Furthermore, the discrepancies between fraud types and individual and organisation victims are also analysed. The results show that while both total cybercrime and total fraud did increase beyond predicted levels, the changes in victimisation were not homogenous across fraud types and victims. The implications of these findings on how changes in routine activities in the UK have influenced cybercrime and fraud opportunities are discussed in relation to policy, practice and academic debate.


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