| Autor(es): |
Número total de Autores: 3
|
| Afiliação do(s) autor(es): | [1] Univ Estadual Campinas, Inst Comp, Campinas, SP - Brazil
[2] Fed Univ ABC, Ctr Math Computat & Cognit, Santo Andre - Brazil
Número total de Afiliações: 2
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOURNAL OF UNIVERSAL COMPUTER SCIENCE; v. 25, n. 2, p. 98-121, 2019. |
| Citações Web of Science: | 0 |
| Resumo | |
For estimating the evolutionary distance between genomes of two different organisms, many sorting permutation problems have emerged. A well accepted way to do this is considering the smallest sequence of rearrangement events - mutations which affect large portions of the genomes - that transform one genome into the other. In these problems, both genomes are represented as permutations of integer numbers, but one of them can be represented as the identity permutation, so that the problem is reduced to sort a permutation. Moreover, rearrangement models define which type of operations (rearrangement events) can be applied over a permutation in order to modify it. Reversals, which are operations that revert a genome segment, and transpositions, which are operations that swap two adjacent genome segments, are two of the most studied types of rearrangements in the literature. In this paper, we consider rearrangement models that allow reversals, transpositions, and both operations together. Since there exist evidences that large mutations rarely occur, we add a restriction with biological relevance: any operation can affect at most lambda elements of a permutation. For this variation of sorting permutation problem, we present approximation algorithms with approximation factors based on the size of the permutation and/or on lambda, for both signed and unsigned permutations (which represent known and unknown gene orientations, respectively). (AU) | |
| Processo FAPESP: | 17/12646-3 - Déjà vu: coerência temporal, espacial e de caracterização de dados heterogêneos para análise e interpretação de integridade |
| Beneficiário: | Anderson de Rezende Rocha |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 13/08293-7 - CECC - Centro de Engenharia e Ciências Computacionais |
| Beneficiário: | Munir Salomao Skaf |
| Modalidade de apoio: | Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs |
| Processo FAPESP: | 15/11937-9 - Investigação de problemas difíceis do ponto de vista algorítmico e estrutural |
| Beneficiário: | Flávio Keidi Miyazawa |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 16/14132-4 - Empacotamentos uni e bidimensionais com restrições de conflitos e remoções |
| Beneficiário: | Carla Negri Lintzmayer |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |