1Study on safety evaluation of intelligent working face based on extension theory with entropy weight approachLI Dongyin, SUN Kaixuan, WANG Shen, WANG Zuguang, ZHANG Xuhe1-92High grouting pressure secondary sealing method for coal seam gas drainage and its applicationYANG Dong, SUN Yuning, CHENG Wei, WANG Zhiming, ZHANG Junxiang10-153Experimental study on abrasive water jet cutting medium granular sandstone under new mixed abrasive methodZHANG Zhigang, YUAN Ruifu, YAO Yuanhang, CHEN Lifeng, QIN Bo16-214Application study on bolt-grouting support technology of soft rock roadway crossing multi-layer in No.1 mine of YungaishanCHEN Zhao, LI Xiaojun, ZHANG Sheng, ZHU Lei, ZHAO Longgang, WANG Hui, WANG Yanzong22-315Research on prediction of backfill strength based on particle swarm optimization algorithmHUANG Xiaohong, CUI Hejia, LIU Zhiyi, LIU Liping, ZHANG Kaiyue32-376Analysis on controlling geological factors for peak gas production of CBM wells in Laochang blcok,eastern Yunnan ProvinceKANG Liuxu, HU Bin, KANG Yongshang, ZENG Wenting, WANG Weihong, GU Jiaoyang, TIAN Bofan38-477Geochemical characteristics and their paleoenvironmental significance of the mudstones from the Lower Cretaceous Bayingebi Formation in the Yin'e BasinLI Jidong, FU Yuxin, JIANG Feihu, LI Da, WANG Yaming, LIU Yunlong, ZHENG Wei, XING Zhifeng48-56,658Protolith restoration and its geological significance of the aluminiferous rock series of the Benxi Formation in the Yanlong area,Western HenanLIU Enfa, CAO Gaoshe, XING Zhou, SUN Fengyu, DU Xin, ZHOU Hongchun, CHEN Yongcai57-659SBAS-InSAR monitoring and analysis of land subsidence in Xiongan New Area from 2017 to 2019RAN Peilian, LI Shaoda, DAI Keren, YANG Xiaoxia, ZENG Sen, RAN Zhongxin66-7310A clock offset prediction model with quadratic polynomial based on LASSO algorithmLI Kun, WANG Qianxin, MIN Yanghai, GONG Youxing, MIAO Wei, CHENG Tong74-8011Inversion of nitrogen nutrition index of spring maize based on hyperspectral remote sensing of UAVCHEN Zhichao, JIANG Guiyin, ZHANG Zheng, LU Junjun, WANG Xinbing, LOU Weidong, LIU Changhua, MIAO Yuxin, HAO Chengyuan81-8912Structural design and experimental study of an ultrasonic motorized spindle adapted to automatic tool changingLIU Jianhui, MA Zhipeng, GUO Xingchen90-95,12713Transformation and application of intelligent dry oil lubrication system in stepping cooling bedSHI Jianfeng, ZHANG Mingjun, LIU Junli96-10214Study on frequency regulation of hydraulic turbine system based on generalized predictive controlSONG Yunzhong, RAN Hao103-11115Identification system of roof strength of coal mine while drilling and optimization study on drilling speedYU Guangdong, MENG Guoying, FENG Xuewen112-11816Multi-objective optimization study on multi-energy coupled system based on transient simulationCUI Mengran, GUO Jianxiang, LI Wenzhuo, TIAN Xueqin, WANG Na, SUN Jinfei119-12717Study on multi-objective integrated process planning and scheduling problem based on NSGA-Ⅲ algorithmZHANG Weiwei, LI Xuguang, WEN Xiaoyu, ZHANG Jing, SHI Wenjun, ZHANG Weizheng128-13718Preceding vehicle detection based on multi-feature fusion and information entropy optimizationZHANG Zheng, WANG Sunqiang, HU Xinyu, XIONG Shenghui, HU Linghui138-14519Research on cumulative dynamic deformation characteristics of compacted silty sand under different initial static shear stressesYANG Liguo, SHAO Shengjun146-151,15820Effects of different factors on pulse pressure responseJIA Shichuan, HU Liqiang, XIAO Zhiyong, WANG Gang, JIANG Feng152-158 