We are currently experiencing intermittent issues impacting performance. We apologize for the inconvenience.
By Topic

Adaptive structuring of binary search trees using conditional rotations

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
Cheetham, R.P. ; Sch. of Comput. Sci., Carleton Univ., Ottawa, Ont., Canada ; Oommen, B.J. ; Ng, D.T.H.

Consider a set A={A1,A2 ,. . ., An} of records, where each record is identified by a unique key. The records are accessed based on a set of access probabilities S=[s1,s2 ,. . ., sN] and are to be arranged lexicographically using a binary search tree (BST). If S is known a priori, it is well known that an optimal BST may be constructed using A and S. The case when S is not known a priori is considered. A new restructuring heuristic is introduced that requires three extra integer memory locations per record. In this scheme, the restructuring is performed only if it decreases the weighted path length (WPL) of the overall resultant tree. An optimized version of the latter method, which requires only one extra integer field per record has, is presented. Initial simulation results comparing this algorithm with various other static and dynamic schemes indicates that this scheme asymptotically produces trees which are an order of magnitude closer to the optimal one than those produced by many of the other BST schemes reported in the literature

Published in:

Knowledge and Data Engineering, IEEE Transactions on  (Volume:5 ,  Issue: 4 )