1GOODCHILD M F. Citizens as sensors: The world of volun-teered geography[J]. GeoJournaK2007,69(4) :211 -221.
2CHENG Z,CAVERLEE J,LEE K,et al. Exploring millions offootprints in location sharing services[A]. Proceedings of the5th International AAAI Conference on Weblogs and SocialMedia[C]. 2011.
3NOULAS A, SCELLATO S, LAMBIOTTE R, et al. A tale ofmany cities: Universal patterns in human urban mobility [J ].PloS one,2012,7(5):e37027.
4CAPELLO R. The city network paradigm: Measurir^ urban net-work externalities [J]. Urban Studies, 2000. 37 ( 11 ) : 1925 -1945.
5MACIONIS J J,PARRILLO V N. Cities and Urban Life[M],Pearson Education,2004.
6XIAO Y, WANG F, LIU Y, et al. Reconstructing gravitationalattractions of major cities in China from air passenger flow da-ta .2001-2008: A particle swarm optimization approach [J].The Professional Geographer,2013,65(2) :265 - 282.
7BAGLER G. Analysis of the airport network of India as a com-plex weighted network[J], Physica A:Statistical Mechanics andIts Applications, 2008,387(12) :2972-2980.
8GUIMERA R, MOSS A S,TURTSCHI A,et al The worldwideair transportation network; Anomalous centrality, communilystructure, and cities' global roles[J]. Proceedings of the Nation-al Academy of Sciences, 2005,102(22) : 7794 -7799.
9KANG C, ZHANG Y, MA X,et al. Inferring properties andrevealing geographical impacts of intercity mobile communica-tion network of China using a subnet data set[J]. InternationalJournal of Geographical Information Science,2013,27(3) : 431-448.
10JEFFERSON M. Why geography. The law of the primate city[J]. Geographical Review, 1989,79(2) :226 - 232.
