Space-time proximity search-based mobile trace sequence mode quick mining method
A mobile trajectory and proximity search technology, which is applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of low execution efficiency of mobile trajectory sequence pattern mining algorithms, increased system resource overhead, etc.
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[0063] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0064] First, a few basic definitions are given:
[0065] Definition 1 Movement trajectory: an ordered list of locations that record the user's continuous movement, defined as T ID =((p 1 , t 1 ), (p 2 , t 2 ),..., (p n , t n )), t 1 2 ...n , where ID represents the serial number of the moving track, (p i , t i ), 1≤i≤n represents a moving track point, p i = (x, y) means the user is at t i The spatial position at the time, x, y represent the horizontal and vertical coordinate values of the spatial position.
[0066] Define 2 space-time spaces: For a discrete space-time domain STD={2 , T>|R 2 ={p i |1≤i≤m}, T={t j |1≤j≤n}}, where R 2 Represents a 2-dimensional geometric space, p i Represents the spatial position of the moving track point, T represents 1-dimensional time, t i Indicates a specific time point, and its correspon...
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