摘要
讨论基于基因组翻转距离的星型进化树问题的算法和复杂性.首先证明星树问题是NP-难解的,再证明该问题不存在绝对近似求解算法,最后给出一个求解星树问题的常数近似算法,近似性能比为2.
In this paper, the algorithms and the computational complexity of Star-Tree phylogeny problem are studied. The Star-Tree phylogeny problem is proved to be NP-complete first. Then it is proved that there is no absolute approximation algorithm for this problem. At last, a polynomial approximation algorithm of ratio 2 is presented to compute the Star-Tree phylogeny problem.
出处
《软件学报》
EI
CSCD
北大核心
2002年第6期1117-1122,共6页
Journal of Software
基金
国家自然科学基金资助项目(60073042)
国家教育部青年教师基金资助项目(y66053
060602)
山东省中青年科学家奖励基金资助项目(01bs03)~~