Bingru Yang Wu Qu Yonghong Xie Yun Zhai Predicting protein second structure using a novel hybrid method. 11657-11664 2011 38 Expert Syst. Appl. 9 https://doi.org/10.1016/j.eswa.2011.03.045 db/journals/eswa/eswa38.html#YangQXZ11