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MySQL Cluster NDB 7.3, MySQL Cluster NDB 7.4
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... signi cant portion of the results are from a joint publication with Erkki. The research has been carried out at the Department of Computer Science of the University of Helsinki. The department, headed by Professors Martti Tienari, Esko Ukkonen and Timo Alanko at di erent times during the research, h ...
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1 2 3 4 5 ... 95 >

Quadtree



A quadtree is a tree data structure in which each internal node has exactly four children. Quadtrees are most often used to partition a two-dimensional space by recursively subdividing it into four quadrants or regions. The regions may be square or rectangular, or may have arbitrary shapes. This data structure was named a quadtree by Raphael Finkel and J.L. Bentley in 1974. A similar partitioning is also known as a Q-tree. All forms of quadtrees share some common features: They decompose space into adaptable cells Each cell (or bucket) has a maximum capacity. When maximum capacity is reached, the bucket splits The tree directory follows the spatial decomposition of the quadtree.
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