Spatio-temporal data quick retrieval method based on MF-Octree

A fast technology for spatiotemporal data, applied in other database retrieval, digital data information retrieval, other database indexing, etc., can solve the problems that cannot meet the spatiotemporal data spatiotemporal retrieval application, limit the application of spatiotemporal query technology, etc., to reduce query response time, Meet the real-time requirements and the effect of real-time problems
CN110334290AActive Publication Date: 2019-10-15CENT SOUTH UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CENT SOUTH UNIV
Publication Date
2019-10-15

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Abstract

The invention discloses a spatio-temporal data quick retrieval method based on MF-Octree, which comprises the following steps: step 1, establishing a time axis taking time as a reference; step 2, whennewly arrived spatio-temporal data is received, storing the newly arrived spatio-temporal data in an octree based on a Z-order curve;, wherein the octree is sequentially located on the correspondingtime period of the time axis according to the time attribute of the stored spatio-temporal data; 3, when a query request is received, according to the time attribute of the query request, finding an octree root node conforming to the corresponding time attribute on the time axis; and step 4, calculating an association degree sorting score of each node in the octree to which the root node belongs,and taking the node of which the association degree sorting score value is smaller than a preset association degree sorting score standard value as a query result and outputting the query result. According to the method, the real-time requirement of a user on spatio-temporal data retrieval can be met, the query response time is shortened, and the user experience of a retrieval system is effectively improved.
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Description

technical field

[0001] The invention relates to the technical field of data retrieval methods (Data Retrieval, DR), in particular to a fast retrieval method for spatio-temporal data based on MF-Octree. Background technique

[0002] Data is an extension of cloud computing technology, and it is the inevitable result of social progress and development. The advent of the era of big data leads the strategic direction of future IT technology development. With the rapid development of information and network technology today, more and more corporate business and social activities have been digitized, especially with the automation of data generation and the acceleration of data generation speed, the amount of data has also increased rapidly, of which sensor data It is one of the main sources of big data. In the era of the Internet of Things, thousands of network sensors are embedded in a growing number of physical devices such as smart meters, mobile phones, and automobiles, const...

Claims

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