Sökning: "Sirui Wu"

Hittade 2 uppsatser innehållade orden Sirui Wu.

1. 1. Zipf's Law for Natural Cities Extracted from Location-Based Social Media Data

   Magister-uppsats, Högskolan i Gävle/Avdelningen för Industriell utveckling, IT och Samhällsbyggnad

   Författare :Sirui Wu; [2015]
   Nyckelord :big data; location-based social media data; Zipf s law; power law; natural cities; ht-index;

   Sammanfattning : Zipf’s law is one of the empirical statistical regularities found within many natural systems, ranging from protein sequences of immune receptors in cells to the intensity of solar flares from the sun. Verifying the universality of Zipf’s law can provide many opportunities for us to further seek the commonalities of phenomena that possess the power law behavior. LÄS MER

3. 2. A study on Extraction of Natural Cities from the Nightlight Imagery Using Head/tail breaks method

   Kandidat-uppsats, Avdelningen för Industriell utveckling, IT och Samhällsbyggnad

   Författare :Sirui Wu; [2013]
   Nyckelord :nightlight imagery; extraction of natural cities; head tail break; threshold; power law;

   Sammanfattning : With the high development of economic and demand for city research, an issue of detecting city boundaries plays an extremely important role in urbanization that promotes the progress of human civilization. Some critical applications such as land use, urban planning and city sprawl have been constantly discussed, which rely on the acquisition of city areas. LÄS MER