TY - Journal of Yangtze River Scientific Research Institute A1 - LONG Hao, GAO Rui, KONG De-xin, LIU Peng T1 - Forecast of Tunnel's Surrounding Rock Displacement by BP Neural Network and Markov Chain Y1 - 2013-03-01 JF - Journal of Yangtze River Scientific Research Institute JO - Journal of Yangtze River Scientific Research Institute SP - 40 EP - 43 VL - 30 IS - 3 UR - http://ckyyb.crsri.cn N1 - 10.3969/j.issn.1001-5485.2013.03.009 ER -