arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0806.1378q-bio.PE
收藏

Hadamard系统发育方法与n-分类单元过程

Hadamard Phylogenetic Methods and the n-taxon process

David Bryant

摘要:

\cite{Hendy89a, Hendy89}的Hadamard变换提供了一种使用随机模型进行序列演化的方法,而不必处理树空间和树的图形结构的复杂性。在这里,我们证明了变换可以表示在熟悉的$\bP[\bt] = e^{\bQ[\bt]}$公式的马尔可夫链。其关键思想是研究状态向量的演化,每个分类单元对应一个向量条目;我们称之为$n$ -分类单元过程。我们推导出该过程的转移概率。值得注意的是,研究结果表明,基于树的模型确实属于(多变量)指数分布家族。

英文摘要:

The Hadamard transform of \cite{Hendy89a, Hendy89} provides a way to work with stochastic models for sequence evolution without having to deal with the complications of tree space and the graphical structure of trees. Here we demonstrate that the transform can be expressed in terms of the familiar $\bP[\bt] = e^{\bQ[\bt]}$ formula for Markov chains. The key idea is to study the evolution of vectors of states, one vector entry for each taxa; we call this the $n$-taxon process. We derive transition probabilities for the process. Significantly, the findings show that tree-based models are indeed in the family of (multi-variate) exponential distributions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑