A future-time query from a user is expressed in the form of (QBR, QT). Here, QBR denotes the querytarget region (includes MBR and VBR) in the 2-dimensional query space, and QT is the target query timeinterval of that query (includes start time and end time). The future-time query...
DANG VAN DUC2Institute of Information Technology, This paper proposes a density optimal method, named as DO-TPR*-tree, which improvesthe performance of the original TPR*-tree significantly. In this