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184results about How to "Improve query efficiency" patented technology

Storage method for centralized extensible fusion type multi-dimensional complex structure relational data

The invention discloses a storage method for centralized extensible fusion type multi-dimensional complex structure relational data. The storage method mainly comprises the following steps of: establishing a data transmission interface format; dynamically configuring attribute parameters; constructing a multi-dimensional data set relational database; constructing a relational data tuple model in the multi-dimensional data set relational database; constructing a relational data object model in the multi-dimensional data set relational database; constructing a dimension-extensible multi-dimensional data set relational database and constructing a multi-dimensional data set relational database of an extensible fusion type complex structure. The storage method disclosed by the invention is suitable for storing, analyzing and managing the large, medium and small-scale complex data of the enterprises, providing effective data with quality assurance for the user-oriented enterprise-level big data integration platforms, and providing an extensible and usable data storage and access technology, so that the storage and query performance problem of semi-structured, structured and non-structured data, small and big data, real-time data and history data.
Owner:SICHUAN UNIV

GPU (graphics processing unit)-based quick star catalogue retrieving method

The invention provides a GPU (graphics processing unit)-based quick star catalogue retrieving method. The method comprises the following steps: (1) dividing a star catalogue into constellations to store by adopting a longitude and latitude partitioning method; (2) calculating the constellation covered by a round view field area of a star sensor, wherein spherical coordinates of a visual axis are calculated at first in the process, boundaries of longitude and latitude of the round view field are calculated, and the constellation covered by the round view field is searched in the partitioned star catalogue; (3) transmitting stars in the constellation into the global memory of the GPU to store in a star set mode, dividing a star operation thread grid of the GPU into a plurality of thread blocks, wherein each thread block is responsible for processing a star set, and each thread is responsible for retrieving a star; and (4) retrieving stars falling in the round view field by each thread, and retrieving stars falling in a charge coupled device (CCD) imaging plane in the round view field. By the method, the retrieving time in each view field is controlled in the millisecond level, so that the real time requirement of constellation generation and other simulation applications to star retrieving in a large view field and wide star magnitude domain can be fulfilled.
Owner:INST OF SOFTWARE - CHINESE ACAD OF SCI

Management method and management system for history and culture information data, and server

The present invention provides a management method for history and culture information data, including the steps as follows: collecting history and culture information data; classifying the history and culture information data; constructing a spatial database for storing history and culture basic spatial data through a first construction method; constructing a history and culture heritage database for storing history and culture heritage data through a second construction method; constructing a spatial data service for providing a service of the history and culture spatial data in a manner of special service through a third construction method; constructing a history and culture heritage data service for publishing the history and culture heritage data stored in the history and culture heritage database through a fourth construction method; constructing a visual engine through a fifth construction method; packaging the spatial data service, the history and culture heritage data service and the visual engine in a manner of pre-storing and packaging so as to generate a history and culture package, and publishing the history and culture package. The management method and a management system for history and culture information data, and a server provided by the invention have the advantages of high concurrent access supporting, high query efficiency, strong universality, and better performance.
Owner:SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI

Method for inquiring distributed Top-k data in wireless sensor network

The invention relates to a method for inquiring distributed Top-k data in the wireless sensor network. The method comprises the following steps that firstly, an image G is utilized for expressing the wireless sensor network, wherein G=(V, E), a corresponding communication predominating subset C for the image G is set, and a predominated node set V' is obtained, and the communication predominating subset C comprises a plurality of predominating nodes; secondly, a BFS tree with an aggregation node v1 as a root is obtained by the adoption of the breadth-first search method for all predominating nodes included by the communication predominating subset C; thirdly, the predominating nodes send information to all predominated nodes so that the predominated nodes can send data held by the predominated nodes to the corresponding predominating nodes, and a data set S is formed by the data collected by the predominating nodes and dominated by the predominated nodes and the data held by the predominating nodes; fourthly, the aggregation node v1 inquires and obtains the needed Top-k data based on the data set S obtained by all predominating nodes. The steps are carried out conveniently, inquiring efficiency is high, and the application range is wide.
Owner:WUXI TSINGHUA NAT LAB FOR INFORMATIONSCI & TECH INTERNET OF THINGS TECH CENT
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