Publications

Highlights

(For a full list see below or go to Google Scholar, ResearcherID)

A framework for mixed-use decomposition based on temporal activity signatures extracted from big geo-data

We proposed a framework for mixed-use decomposition based on big geospatial data, consisting of four steps as temporal activity signature extraction, urban function base curve extraction, mixed-use decomposition, and result validation.

Lun Wu, Ximeng Cheng, Chaogui Kang, Di Zhu, Zhou Huang, Yu Liu

International Journal of Digital Earth (2019)

See also mp.weixin.qq.com .

Understanding the interplay between bus, metro and cab ridership dynamics in Shenzhen, China

We developed a novel spectral clustering framework for unveiling the spatio‐temporal interplay between different mass transit modes with a comprehensive data collection of bus, metro, and taxicab ridership from Shenzhen, China.

Mengxue Yue, Chaogui Kang, Clio Andris, Kun Qin, Yu Liu, Qingxiang Meng

Transactions in GIS, 22(3), 855-871 (2018)

See also mp.weixin.qq.com .

Quantifying tourist behavior patterns by travel motifs and geo-tagged photos from Flickr

We utilized geo-tagged photos from Flickr to extract trajectories of tourists and extended the concept of motifs from topological spaces, to temporal spaces and to semantic spaces, for detecting meaningful tourist mobility patterns.

Liu Yang, Lun Wu, Yu Liu, Chaogui Kang

ISPRS International Journal of Geo-Information, 6(11), 345 (2017)

Understanding operation behaviors of taxicabs in cities by matrix factorization

We developed a matrix factorization based analytical framework to quantify, visualize and evaluate the efficiency performances of taxicabs with distinct spatial operation behaviors.

Chaogui Kang, Kun Qin

Computers, Environment and Urban Systems, 60, 79-88 (2016)

See also mp.weixin.qq.com .

Social sensing: a new approach to understanding our socioeconomic environments

We proposed social sensing as the analogue and complement of remote sensing to capture the socioeconomic features of urban environment with individual-level big geospatial data.

Yu Liu, Xi Liu, Song Gao, Li Gong, Chaogui Kang, Ye Zhi, Guanghua Chi, Li Shi

Annals of the Association of American Geographers, 105(3), 512-530 (2015)

See also Peking University news and mp.weixin.qq.com .

The impact of social segregation on human mobility in developing and urbanized regions

We unraveled how cultural and linguistic diversity in developing regions (such as Ivory Coast) can present challenges to mobility models that perform well and were conceptualized in less culturally diverse regions.

Alexander Amini, Kevin Kung, Chaogui Kang, Stanislav Sobolevsky, Carlo Ratti

EPJ Data Science, 3(6), 1-20 (2014)

See also United Nations Global Pulse by Jennifer Poole .

Exploring human movements in Singapore: a comparative analysis based on mobile phone and taxicab usages

We integrated mobile phone and taxicab trajectory data to explore human movements in Singapore and reveal that mobile phone movements manifest substantially different spatio-temporal characteristics compared to taxicab trips.

Chaogui Kang, Stanislav Sobolevsky, Yu Liu, Carlo Ratti

The 2nd International Workshop on Urban Computing, 1-7 (2013)

Intra-urban human mobility patterns: an urban morphology perspective

We uncovered that the distance distribution of intra-urban human mobility captured by mobile phone data in general follows the exponential law and the corresponding exponent depends on the size and shape of the city.

Chaogui Kang, Xiujun Ma, Daoqin Tong, Yu Liu

Physica A - Statistical Mechanics and its Applications, 391(4), 1702-1717 (2012)

Working Papers

An ensemble learning approach to predict urban land use function by combining high resolution satellite imagery and social sensing data
Zhou Huang, Houji Qi, Chaogui Kang

Exploring the change rules of animal movement patterns among species using turning behavioural structure
Tianxing Yu, Jianya Gong, Chaogui Kang, Kunlun Qi, Huayi Wu, Jie Zheng, Guo’an Tang

Validating activity, time and space diversity as essential components of urban vitality
Chaogui Kang, Dongwan Fan, Hongzan Jiao

Modeling spatio-temporal evolution of urban crowd flows
Kun Qin, Yuanquan Xu, Chaogui Kang

A graph convolutional network model for evaluating potential congestion spots based on local urban built enviroments
Yuanquan Xu, Kun Qin, Chaogui Kang

Mining deep linkage between human activity volumes and satellite remote sensing observations
Xiaoyue Xing, Zhou Huang, Ximeng Cheng, Di Zhu, Chaogui Kang, Fan Zhang, Yu Liu

Built-up land expansion simulation with combination of Naive Bayes and Cellular Automata model
Rui Xiao, Xiaoyu Yu, Yiming Zeng, Chaogui Kang, Zhonghao Zhang, Junzhe Tang

Group centrality in time-evolving spatial interaction networks
Chaogui Kang, Zhuojun Jiang

How urban places are visited by social groups? Evidence from matrix factorization on mobile phone data
Chaogui Kang, Li Shi, Yu Liu

Nowhere to hide: The sunk costs of subscribing telecommunication service
Chaogui Kang, Yaoli Wang, Di Zhu, Yu Liu

Towards spatial interactions extracted from big geo-data
Yu Liu, Xin Yao, Yongxi Gong, Chaogui Kang, Xun Shi, Fahui Wang, Jiao’e Wang, Yi Zhang, Pengfei Zhao, Di Zhu, Xinyan Zhu

Methods of social sensing in urban studies
Yu Liu, Yihong Yuan, Chaogui Kang

 

Full List

Escaping from pollution: The effect of air quality on inter-city population mobility in China
Can Cui, Zhen Wang, Pan He, Shanfeng Yuan, Beibei Niu, Ping Kang, Chaogui Kang
Environmental Research Letters (2019)

A framework for mixed-use decomposition based on temporal activity signatures extracted from big geo-data
Lun Wu, Ximeng Cheng, Chaogui Kang, Di Zhu, Zhou Huang, Yu Liu
International Journal of Digital Earth (2019)

Impact of weather condition on intra-urban travel behavior: evidence from taxi trajectory data
Chaogui Kang, Xuan Liu, Xinyue Xu, Kun Qin
Journal of Geo-information Science, 21(1), 118-127 (2019)

An analytical framework for understanding urban functionality from human activities
Chaogui Kang, Yu Liu
The 10th International Conference on Geographic Information Science, 1-8 (2018)

Understanding the interplay between bus, metro and cab ridership dynamics in Shenzhen, China
Mengxue Yue, Chaogui Kang, Clio Andris, Kun Qin, Yu Liu, Qingxiang Meng
Transactions in GIS, 22(3), 855-871 (2018)

Quantifying tourist behavior patterns by travel motifs and geo-tagged photos from Flickr
Liu Yang, Lun Wu, Yu Liu, Chaogui Kang
ISPRS International Journal of Geo-Information, 6(11), 345 (2017)

An analysis of entropy of human mobility from mobile phone data
Chaogui Kang, Yu Liu, Lun Wu
Geomatics and Information Science of Wuhan University, 42(1), 63-69 (2017)

Understanding operation behaviors of taxicabs in cities by matrix factorization
Chaogui Kang, Kun Qin
Computers, Environment and Urban Systems, 60, 79-88 (2016)

Predicting vehicular emissions in high spatial resolution using pervasively measured transportation data and microscopic emissions model
Marguerite Nyhan, Stanislav Sobolevsky, Chaogui Kang, Prudence Robinson, Andrea Corti, Michael Szell, David Streets, Zifeng Lu, Rex Britter, Steven R.H. Barrett, Carlo Ratti
Atmospheric Environment, 140, 352-363 (2016)

Incorporating spatial interaction patterns in classifying and understanding urban land use
Xi Liu, Chaogui Kang, Li Gong, Yu Liu
International Journal of Geographical Information Science, 30(2), 334-350 (2016)

A generalized radiation model for human mobility: spatial scale, searching direction and trip constraint
Chaogui Kang, Yu Liu, Diansheng Guo, Kun Qin
PLoS ONE, 10(11), e0143500 (2015)

Social sensing: a new approach to understanding our socioeconomic environments
Yu Liu, Xi Liu, Song Gao, Li Gong, Chaogui Kang, Ye Zhi, Guanghua Chi, Li Shi
Annals of the Association of American Geographers, 105(3), 512-530 (2015)

The impact of social segregation on human mobility in developing and urbanized regions
Alexander Amini, Kevin Kung, Chaogui Kang, Stanislav Sobolevsky, Carlo Ratti
EPJ Data Science, 3(6), 1-20 (2014)

Towards big-data-based human mobility patterns and models
Yu Liu, Chaogui Kang, Fahui Wang
Geomatics and Information Science of Wuhan University, 39(6), 660-666 (2014)

Uncovering patterns of inter-urban trip and spatial interaction from social media check-in data
Yu Liu, Zhengwei Sui, Chaogui Kang, Yong Gao
PLoS ONE, 9(1), e86026 (2014)

Analyzing relatedness by toponym co-occurrences on web pages
Yu Liu, Fahui Wang, Chaogui Kang, Yong Gao, Yongmei Lu
Transactions in GIS, 18(1), 89-107 (2014)

Inferring properties and revealing geographical impacts of inter-city mobile communication network of China using a subnet data set
Chaogui Kang, Yi Zhang, Xiujun Ma, Yu Liu
International Journal of Geographical Information Science, 27(3), 431-448 (2013)

Exploring human movements in Singapore: a comparative analysis based on mobile phone and taxicab usages
Chaogui Kang, Stanislav Sobolevsky, Yu Liu, Carlo Ratti
The 2nd International Workshop on Urban Computing, 1-7 (2013)

Traffic flow simulation based on call detail records
Jiansheng Wu, Li Huang, Yu Liu, Jian Peng, Weifeng Li, Song Gao, Chaogui Kang
ACTA GEOGRAPHICA SINICA, 67(12), 1657-1665 (2012)

Towards estimating urban population distributions from mobile call data
Chaogui Kang, Yu Liu, Xiujun Ma, Lun Wu
Journal of Urban Technology, 19(4), 3-21 (2012)

Understanding intra-urban trip patterns from taxi trajectory data
Yu Liu, Chaogui Kang, Song Gao, Yu Xiao, Yuan Tian
Journal of Geographical Systems, 14(4), 463-483 (2012)

Intra-urban human mobility patterns: an urban morphology perspective
Chaogui Kang, Xiujun Ma, Daoqin Tong, Yu Liu
Physica A - Statistical Mechanics and its Applications, 391(4), 1702-1717 (2012)

A review of human mobility research based on location aware devices
Yu Liu, Yu Xiao, Song Gao, Chaogui Kang, Yaoli Wang
Geography and Geo-Information Science, 27(4), 8-13 (2011)