Efficient Exponential Time Algorithms for Edit Distance between Unordered Trees
Efficient Exponential Time Algorithms for Edit Distance between Unordered Trees
复制标题
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:
影响因子:
--
通讯作者:
Atsuhiro Takasu
中科院分区:
文献类型:
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作者:
Tatsuya Akutsu;Takeyuki Tamura;Daiji Fukagawa;Atsuhiro Takasu
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:
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影响因子:
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作者:
M. Halldórsson;Keisuke Tanaka
通讯作者:
Keisuke Tanaka
影响因子:
1.1
作者:
S. Canzar;Khaled M. Elbassioni;G. Klau;Julián Mestre
通讯作者:
Julián Mestre