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分类依据与纠错

AI 根据所提供的论文材料归类:摘要明确从干预数据学习具有反馈循环的因果图;有环图本身不足以归为网络干扰。

反馈分类问题

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代码、数据与补充材料

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关注这篇论文的作者
Romain Lopez
Rahul Mohan
Faramarz Fekri
Tommaso Biancalani

NODAGS-Flow:非线性有环因果结构学习

研究问题
真实系统存在反馈循环且关系非线性时,如何利用干预数据学习有环因果图,并构建具有明确概率基础的模型?
方法与思路
作者提出 NODAGS-Flow,利用残差归一化流技术估计似然,以直接似然优化学习非线性有环因果图模型。
材料陈述的贡献
摘要称方法在合成实验及单细胞扰动筛选数据中,相对所比较的现有方法,在结构恢复和预测表现上取得显著改善。
阅读关注点
应核对反馈系统的解与概率模型如何定义、干预信息如何进入似然,以及结构可识别性、优化约束和比较评价标准。
阅读边界
这是 arXiv 预印本,同行评审及期刊接收未核验。摘要未列明识别与稳定性条件,也未提供改善幅度或统计显著性检验细节。

原文摘要

Learning causal relationships between variables is a well-studied problem in statistics, with many important applications in science. However, modeling real-world systems remain challenging, as most existing algorithms assume that the underlying causal graph is acyclic. While this is a convenient framework for developing theoretical developments about causal reasoning and inference, the underlying modeling assumption is likely to be violated in real systems, because feedback loops are common (e.g., in biological systems). Although a few methods search for cyclic causal models, they usually rely on some form of linearity, which is also limiting, or lack a clear underlying probabilistic model. In this work, we propose a novel framework for learning nonlinear cyclic causal graphical models from interventional data, called NODAGS-Flow. We perform inference via direct likelihood optimization, employing techniques from residual normalizing flows for likelihood estimation. Through synthetic experiments and an application to single-cell high-content perturbation screening data, we show significant performance improvements with our approach compared to state-of-the-art methods with respect to structure recovery and predictive performance.

笔记与分组