I read a paper, named A Hybrid Novelty Score and Its Use in Keystroke Dynamics-Based User Authentication. It states in section 3 that
For data sets, we used 10 realizations for parameter selection and 20 other realizations for parameter selection.
Does realization in this case mean simulation?
The following is the link of this paper: http://www.sciencedirect.com/science/article/pii/S0031320309001502