论文标题
稳健的贝叶斯非负矩阵分解与隐式正规化器
Robust Bayesian Nonnegative Matrix Factorization with Implicit Regularizers
论文作者
论文摘要
我们引入了一个具有隐式规范正规化的概率模型，用于学习非负矩阵分解（NMF），该模型通常用于预测缺失值并在数据中找到隐藏模式，其中矩阵因子是与每个数据维度相关的潜在变量。通过在非负子空间（例如，基于指数函数）支持指数密度或分布的情况下，可以选择潜在因素的非负限制。采用了基于Gibbs抽样的贝叶斯推理程序。 We evaluate the model on several real-world datasets including Genomics of Drug Sensitivity in Cancer (GDSC $IC_{50}$) and Gene body methylation with different sizes and dimensions, and show that the proposed Bayesian NMF GL$_2^2$ and GL$_\infty$ models lead to robust predictions for different data values and avoid overfitting compared with competitive Bayesian NMF approaches.
We introduce a probabilistic model with implicit norm regularization for learning nonnegative matrix factorization (NMF) that is commonly used for predicting missing values and finding hidden patterns in the data, in which the matrix factors are latent variables associated with each data dimension. The nonnegativity constraint for the latent factors is handled by choosing priors with support on the nonnegative subspace, e.g., exponential density or distribution based on exponential function. Bayesian inference procedure based on Gibbs sampling is employed. We evaluate the model on several real-world datasets including Genomics of Drug Sensitivity in Cancer (GDSC $IC_{50}$) and Gene body methylation with different sizes and dimensions, and show that the proposed Bayesian NMF GL$_2^2$ and GL$_\infty$ models lead to robust predictions for different data values and avoid overfitting compared with competitive Bayesian NMF approaches.
