The demo.m is from the following paper:

Anti-Drift in E-nose: A Subspace Projection Approach with Drift Reduction

This paper can be download from 

1. for DRCA, the DRCA.m is used
2. data.mat £­£­The dataset from Vergara et al. in UCSD, the detailed content can be foud in the following paper: Chemical gas sensor drift compensation using classifier ensembles

wherein Batch1 is regarded as source domain, and Batch(i) is regarded as target domain, where i=2,3,...,10




