How can rewrite the long sentence as below


Two significant contributions of this work are: 1) the exploitation of a semi-supervised feature extraction, called Semi-supervised Probabilistic Principal Component Analysis (S$^{2}$PPCA), which combines both the unlabeled and labeled information to extract reliable lower-dimensionality features; 2) the integration of spatial information using segmentation approaches, including partitional clustering based methods, Mean-shift and watershed transformation.

longsentence asked Aug 22 '13 at 08:50 Junshi New member

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