Efficient Exponential Time Algorithms for Edit Distance between Unordered Trees

Efficient Exponential Time Algorithms for Edit Distance between Unordered Trees
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无序树间编辑距离的高效指数时间算法

DOI:
10.1007/978-3-642-31265-6_29
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发表时间:
2012
期刊:
Lecture Note in Computer Science
影响因子:
--
通讯作者:
Atsuhiro Takasu
Atsuhiro Takasu
中科院分区:
--
文献类型:
--
作者:
Tatsuya Akutsu;Takeyuki Tamura;Daiji Fukagawa;Atsuhiro Takasu

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本文提出了一种有效的指数时间算法来解决无序树编辑距离问题,这是已知的NP-难。在一般情况下,给出了一个时间算法,其中1和n2是两个输入树的节点数。该算法结合了动态规划、穷举搜索和最大加权二部匹配等技术。对于固定字母表上的有界度树,证明了对于任意固定的ε> 0,该问题都能及时解.这个结果是通过避免重复计算相同的子集的小子树。
This paper presents efficient exponential time algorithms for the unordered tree edit distance problem, which is known to be NP-hard. For a general case, antime algorithm is presented, wheren1andn2are the numbers of nodes in two input trees. This algorithm is obtained by a combination of dynamic programming, exhaustive search, and maximum weighted bipartite matching. For bounded degree trees over a fixed alphabet, it is shown that the problem can be solved intime for any fixedε> 0. This result is achieved by avoiding duplicate calculations for identical subsets of small subtrees.
DOI: 10.1007/bfb0009483
发表时间: 1996
期刊: --
影响因子: --
作者:
M. Halldórsson;Keisuke Tanaka
通讯作者: Keisuke Tanaka
DOI: --
发表时间: 2011
期刊: Algorithmica
影响因子: 1.1
作者:
S. Canzar;Khaled M. Elbassioni;G. Klau;Julián Mestre
通讯作者: Julián Mestre