 2) The information input is processed by Dimensionality-up or dimensionality-reduction; and 3) One / Few or large samples are used for knowledge learning.
<coherence>  2) The information input is processed by Dimensionality-up or dimensionality-reduction; and 3) One / Few or large samples are used for knowledge learning.
 2) The information input is processed by Dimensionality-up or Dimensionality-reduction; 3) One / Few or large samples are used for knowledge learning.