University of Illinois Urbana-Champaign

Advanced space-time integration for knowledge discovery in human mobility studies

Xu, Li

Content Files
XU-DISSERTATION-2019.pdf

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https://hdl.handle.net/2142/106442

Description

Title
Advanced space-time integration for knowledge discovery in human mobility studies
Author(s)
Xu, Li
Issue Date
2019-12-04
Director of Research (if dissertation) or Advisor (if thesis)
Kwan, Mei-Po
Doctoral Committee Chair(s)
Kwan, Mei-Po
Committee Member(s)
  • McLafferty, Sara
  • Li, Bo
  • Cidell, Julie
Department of Study
Geography & Geographic InfoSci
Discipline
Geography
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Date of Ingest
2020-03-02T22:38:42Z
Keyword(s)
  • Space-time modeling
  • Mobility
  • Space-time kernel
  • Sequential pattern mining
  • Bayesian networks
  • Demand modeling
  • Deep learning
  • LSTM
Abstract
In the past decade or so, advances in positioning technologies and the prevalence of smart personal devices for capturing individual movement have given rise to a wide range of studies, including transportation, public health, tourism, and social network services. With the fast-growing volume of and interest in spatio-temporal mobility data, there is also an increasing need for new methods of analyzing this kind of data. Particularly, considerable effort has been made to characterize human activity-travel patterns from the spatio-temporal mobility data. However, knowledge discovery from the large-scale human mobility data remains a challenging task due to its complex spatio-temporal variations. Most traditional statistical and machine learning techniques are powerful for prediction tasks but are not tailored to characterize the dynamical spatio-temporal correlations in the human mobility data. This dissertation offers several methodological and practical contributions to the field through developing a set of novel methods and validation with real-world use cases. First, a locally adaptive space-time kernel approach is proposed to model the non-emergency municipal services demand in Chicago. Second, this work develops novel sequential similarity measures for analyzing human activity-travel patterns and Bayesian networks models with specially designed topology to predict the forthcoming activity at the individual level. Last, a deep convolutional LSTM networks model is proposed to capture the spatial and temporal dependencies in an integrated way to predict real-time taxi demand. All proposed models are proven to be more effective or robust in various real-world experiments as compared to traditional statistical or machine learning algorithms but are not limited to these use cases. The methods contribute to any point demand modeling, regional demand modeling, and sequential trajectory learning problems for spatio-temporal data.
Graduation Semester
2019-12
Type of Resource
text
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http://hdl.handle.net/2142/106442
Copyright and License Information
Copyright 2019 Li Xu

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Graduate Dissertations and Theses at Illinois PRIMARY
Graduate Theses and Dissertations at Illinois
Dissertations and Theses - Geography and Geographic Information Science