Space-time index establishing method based on frequency attributes and PCA
A frequency attribute and index building technology, applied in database indexing, structured data retrieval, database model, etc., can solve the problems of significantly improved spatiotemporal query efficiency, low spatiotemporal data query efficiency, etc., to increase the speed of search, scientific selection Reasonable and efficient query effect
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[0029] Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention, should be understood that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention All modifications of the valence form fall within the scope defined by the appended claims of the present application.
[0030] A method for establishing a space-time index based on frequency and PCA, comprising the steps of:
[0031] Step 1, data collection, to obtain enough data generated by objects in real application scenarios with four characteristics of longitude, latitude, time and query frequency (called spatiotemporal characteristics based on frequency attributes), these four characteristic fields cannot exist anything missing.
[0032] Step 2, data preprocessing, regard all ...
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