Two methods, Dispersion and VST, are included in this workflow. The Dispersion method is based on the mean.var. plot in the Seurat package. VST is based on a Loess fitting method which is also described in Seurat.Please check https://satijalab.org/seurat/vignettes.html and Comprehensive Integration of Single-Cell Data at https://www.cell.com/cell/fulltext/S0092-8674(19)30559-8 for more information.