Open Access
Computing maximum-scoring segments optimally
Fredrik Bengtsson,Jingsen Chen +1 more
- 01 Jan 2007
9
TL;DR: In this paper, the problem of finding a set of k disjoint subsequences of consecutive elements such that the total sum of all elements in the set is maximized was studied.
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Abstract: Given a sequence of length n, the problem studied in this report is to find a set of k disjoint subsequences of consecutive elements such that the total sum of all elements in the set is maximized. ...
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Citations
Encodings of Range Maximum-Sum Segment Queries and Applications
Paweł Gawrychowski,Patrick K. Nicholson +1 more
- 29 Jun 2015
TL;DR: The first result is that if only the indices \([i',j'] are desired (rather than the maximum sum achieved in that subrange), then it is possible to reduce the space to \(\varTheta (n) bits, regardless the numbers stored in \(A\), while retaining the same construction and query time.
•Posted Content
Encodings of Range Maximum-Sum Segment Queries and Applications
TL;DR: In this article, the space lower bound for range maximum-sum segment queries was improved to 1.89113n − ε(lg n) bits, for sufficiently large values of n.
6
•Journal Article
An optimal algorithm for the maximum-density segment problem
Kai-Min Chung,Hsueh-I Lu +1 more
TL;DR: The algorithm has the capability to process the input sequence in an online manner, which is an important feature for dealing with genome-scale sequences and shows how to exploit the sparsity of S and solve the maximum-density segment problem for S in O(m) time.
4
Identifying Clusters in Graph Representations of Genomes
Eva Herencsárová,Brona Brejova +1 more
TL;DR: This work provides a linear-time algorithm for a special class of graphs corresponding to elastic-degenerate strings, one of pangenome representations, and provides a fixed-parameter tractable algorithm for directed acyclic graphs with a special path decomposition of a limited width.
1
Maximum-scoring path sets on pangenome graphs of constant treewidth
Broňa Brejová,Travis Gagie,Eva Herencsárová,Tomáš Vinař +3 more
TL;DR: Generalization from sequences to graphs allows the algorithm to be used on pangenome graphs representing several related genomes and can be seen as a common abstraction for several biological problems on pangenomes, including searching for CpG islands, ChIP-seq data analysis, analysis of region enrichment for functional elements, or simple chaining problems.
1
References
Programming pearls: perspective on performance
TL;DR: This column is about the opportunities for efficiency at various design levels of a computer system: each technique is applicable to one of several design levels at which computer systems are built.
81
An Optimal Algorithm for the Maximum-Density Segment Problem
Kai-Min Chung,Hsueh-I Lu +1 more
TL;DR: In this paper, the authors solved the problem in O(n) time by exploiting the sparsity of the input biomolecular sequences and solving the maximum-density segment problem in an online manner.
52
MaxSubSeq: an algorithm for segment-length optimization. The case study of the transmembrane spanning segments.
TL;DR: This paper describes a general dynamic programming-like algorithm specifically designed to optimize the number and length of segments with constrained length in a given protein sequence, and presents the detailed description of MaxSubSeq.
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Efficient Algorithms for k Maximum Sums
Fredrik Bengtsson,Jingsen Chen +1 more
TL;DR: The algorithm is optimal for k = \Omega(n \log^2 n) and improves over the previously best known result for any value of the user-defined parameter k < 1, resulting in fast algorithms as well.
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Improved algorithms for the K -maximum subarray problem for small K
Sung Eun Bae,Tadao Takaoka +1 more
- 16 Aug 2005
TL;DR: The K-maximum subarray problem is to find the K subarrays with largest sums, and the time complexity is improved from O(min K+n\log^2 n, n\sqrt{K}\}) to O(nlog K + K2) for K ≤ n.
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