Tianhao Zhang Dacheng Tao Xuelong Li Jie Yang Patch Alignment for Dimensionality Reduction. 1299-1313 2009 21 IEEE Trans. Knowl. Data Eng. 9 http://dx.doi.org/10.1109/TKDE.2008.212 db/journals/tkde/tkde21.html#ZhangTLY09