Multi-layer Long Short-term Memory based Condenser Vacuum Degree Prediction Model on Power PlantKuan Lu, Song Gao, Pang Xiangkun, Zhu lingkai, Xiangrong Meng and Wenxue SunE3S Web Conf., 136 (2019) 01012DOI: https://doi.org/10.1051/e3sconf/201913601012