相关实验视频
Updated: May 27, 2025
12:00
A Practical Guide to Phylogenetics for Nonexperts
Published on: February 5, 2014
35.3K
菲洛VAE:通过变异自编码器进行非监督学习的家族遗传树
Tianyu Xie1, Harry Richman2, Jiansi Gao2
1School of Mathematical Sciences, Peking University.
ArXiv
|February 20, 2025
概括
遗传学变异自编码器 (PhyloVAEs) 提供了一种新的无监督方法,用于从树结构中学习进化关系. 与古典技术相比,这种方法可以更快,更高分辨率地生成和表示家族遗传树.
科学领域:
- 生物信息学是一种生物信息学.
- 计算生物学 计算生物学
- 机器学习 机器学习
背景情况:
- 遗传学树分析对于理解进化关系至关重要.
- 传统的以距离为基础的树表示方法在分辨率和度量灵敏度方面存在局限性.
- 无监督学习为改进家族遗传树分析提供了潜力.
研究的目的:
- 引入全系变异自编码器 (PhyloVAEs),用于树拓的无监督表示和生成学习.
- 开发一个高分辨率表示和有效生成家族遗传树的框架.
- 为了解决家族遗传树分析中经典方法的局限性.
主要方法:
- 开发了一个无监督学习框架,PhyloVAEs,利用深潜变量模型.
- 结合了灵感来自自回归树拓生成的高效编码机制.
- 结合了生成模型和基于可学习的拓特征的协作推理模型.
主要成果:
- 菲洛瓦埃表现出对遗传树结构的强大表示学习能力.
- 该框架能够快速,并行生成类遗传树拓.
- 实现了基因树样本的高分辨率表示.
结论:
- 植物遗传树提供了一个有效的无监督的框架,用于植物遗传树的表征学习和生成.
- 提出的方法克服了传统方法的局限性,提供了更好的分辨率和速度.
- 生物维生素具有促进进化关系分析的巨大潜力.
相关概念视频
03:21Phylogenetic Trees
45.0K
Phylogenetic trees come in many forms. It matters in which sequence the organisms are arranged from the bottom to the top of the tree, but the branches can rotate at their nodes without altering the information. The lines connecting individual nodes can be straight, angled, or even curved.
45.0K
02:54Evolutionary Relationships through Genome Comparisons
5.7K
Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...
5.7K
01:19Survival Tree
52
Survival trees are a non-parametric method used in survival analysis to model the relationship between a set of covariates and the time until an event of interest occurs, often referred to as the "time-to-event" or "survival time." This method is particularly useful when dealing with censored data, where the event has not occurred for some individuals by the end of the study period, or when the exact time of the event is unknown.
Building a Survival Tree
Constructing a...
Building a Survival Tree
Constructing a...
52
01:23Phylogeny
43.5K
Phylogeny is concerned with the evolutionary diversification of organisms or groups of organisms. A group of organisms with a name is called a taxon (singular). Taxa (plural) can span different levels of the evolutionary hierarchy. For instance, the group containing all birds is a taxon (comprising the class Aves), and the group of all species of daisies (the genus Bellis) is a taxon. Phylogenies can likewise include just one genus (i.e., depict species relationships) or span an entire kingdom.
43.5K
02:05Gene Evolution - Fast or Slow?
7.0K
The genomes of eukaryotes are punctuated by long stretches of sequence which do not code for proteins or RNAs. Although some of these regions do contain crucial regulatory sequences, the vast majority of this DNA serves no known function. Typically, these regions of the genome are the ones in which the fastest change, in evolutionary terms, is observed, because there is typically little to no selection pressure acting on these regions to preserve their sequences.
In contrast, regions which code...
In contrast, regions which code...
7.0K
01:24Sequence Networks of Rotating Machines
90
A Y-connected synchronous generator, grounded through a neutral impedance, is designed to produce balanced internal phase voltages with only positive-sequence components. The generator's sequence networks include a source voltage that is exclusively in the positive-sequence network. The sequence components of line-to-ground voltages at the generator terminals illustrate this configuration.
Zero-sequence current induces a voltage drop across the generator's neutral impedance and other...
Zero-sequence current induces a voltage drop across the generator's neutral impedance and other...
90