A non-negative tensor decomposition city dynamic analysis method based on context awareness

A non-negative tensor decomposition and analysis method technology, applied in the field of smart cities and data mining, can solve the problems of inability to analyze the long-term evolution of dynamic models, inability to fit the interaction between models, etc., and achieve the effect of accurate models

Active Publication Date: 2019-04-26
BEIHANG UNIV
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Problems solved by technology

The model created by the invention overcomes the problems that the existing models cannot fit the interaction between the models and cannot analyze the long-term evolution of the dynamic model, and at the same time introduces the urban context information to make the results more accurate

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  • A non-negative tensor decomposition city dynamic analysis method based on context awareness
  • A non-negative tensor decomposition city dynamic analysis method based on context awareness
  • A non-negative tensor decomposition city dynamic analysis method based on context awareness

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[0040] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0041] An embodiment of the present invention provides a method for analyzing urban dynamics based on context-aware non-negative tensor decomposition, referring to figure 1 shown, including:

[0042] S1. Divide the city to be analyzed into M regions, and divide each day into N time slices;

[0043] S2. Extract the departure place, arrival place and time information from the trajectory data related to human activities; match the de...

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Abstract

The invention relates to an urban dynamic analysis method of non-negative tensor decomposition based on context awareness, tensor factor decomposition is adopted as the basis of a model, and the modelnot only can find human activity space and time modes in a city, but also can simulate the interaction among the modes; In addition, urban context information is introduced into the tensor factor decomposition model, so that the model is more accurate; The invention further provides an assembly line initialization method for analyzing the tensor sequence, so that the non-negative tensor decomposition model can analyze the long-term evolution of city dynamics. According to the method, a context-aware non-negative tensor decomposition model (cNTF) is provided, resident flow data and urban environment information are utilized, and potential modes of human activities in cities are discovered based on tensor Tucker decomposition. According to the method provided by the invention, the problemsthat an existing model cannot perform interaction between fitting modes and cannot analyze long-term evolution of a dynamic mode are solved, and meanwhile, urban context information is introduced, sothat the result is more accurate.

Description

technical field [0001] The present invention relates to the field of data mining technology and the field of smart city technology, in particular to an urban dynamic analysis method based on context-aware non-negative tensor decomposition. Background technique [0002] In intelligent transportation systems (ITS) and urban computing, tensor decomposition (factorization) is an effective tool for modeling spatiotemporal data. Based on tensor decomposition, the existing space-time modeling techniques are based on the factors obtained after decomposition, trying to reveal the potential physical meaning of each mode. For example, a second-order tensor matrix is ​​used to fit urban taxi travel data, and non-negative matrix factorization (NMF) is used to dig out potential factors corresponding to the daily rhythm of residents; tensor cp decomposition is used to analyze residents' health in the earthquake in Japan Mobile phone data, discovering different human activity patterns; usi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/18G06K9/62G06Q50/26
CPCG06F17/18G06Q50/26G06F18/2133
Inventor 王静远陈超熊璋
Owner BEIHANG UNIV
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