摘要
单细胞测序技术的快速发展为解析细胞异质性提供了前所未有的分辨率,但高噪声数据与复杂细胞亚群的精准聚类仍是重大挑战。文章提出了一种融合深度去噪网络与多头自注意力机制的深度聚类框架,旨在提升单细胞数据的特征表示能力与聚类鲁棒性。首先,设计基于深度去噪自编码器的深度去噪网络(DN),通过引入InfoNCE对比损失函数增强特征解耦能力,有效抑制数据噪声并提取低维干净特征;随后,提出一种结合多头自注意力机制的深度聚类网络(CN),利用注意力权重捕捉特征间全局关联性,并通过模糊K-means算法动态优化隶属度矩阵U与聚类中心。在多个公开单细胞数据集上的实验表明,本方法较其他聚类算法具有更好的聚类效果,为单细胞数据的高效解析提供了新的理论支持与技术工具。
The rapid development of single-cell sequencing technology has provided unprecedented resolution for resolving cellular heterogeneity,but accurate clustering of noisy data and complex cell subpop-ulations remains a major challenge.This paper proposes a deep clustering framework that inte-grates a deep denoising network and a multi-head self-attention mechanism,aiming to improve the feature representation ability and clustering robustness of single-cell data.Firstly,a deep denoising network(DN)based on a deep denoising autoencoder was designed,and the feature decoupling ability was enhanced by introducing the InfoNCE contrast loss function,which effectively sup-pressed the data noise and extracted low-dimensional clean features.Subsequently,a deep cluster-ing network(CN)combined with a multi-head self-attention mechanism was proposed,which used attention weights to capture the global correlation between features and dynamically optimized the membership matrix U and the clustering center through the fuzzy K-means algorithm.Experiments on multiple public single-cell datasets show that the proposed method has a better clustering effect than other clustering algorithms and provides new theoretical support and technical tools for the efficient analysis of single-cell data.
作者
齐紫瑶
Ziyao Qi(School of Science,Dalian Jiaotong University,Dalian Liaoning)
出处
《建模与仿真》
2025年第5期818-828,共11页
Modeling and Simulation
关键词
单细胞测序
自编码器
自注意力机制
聚类
Single-Cell Sequencing
Autoencoder
Self-Attention Mechanism
Clustering
