1A dynamic monitoring and early warning method for tip clearance of mine ventilatorLI Xuezhe, LI Xiaoping, HE Wei, WANG Fei1-62Research on narrow pillar setting and asymmetric support technology of gob side entry in extra thick coal seamLIU Yiping, YIN Shuaifeng, YANG Jingfeng, ZUO Anjia7-123Analysis on safety risk pre-control management mode of Linxi old mine in KailuanMA Chenyang, XU Jingde, WANG Zhi'e13-17,254Identification and quantitative analysis of goaf gas sourceCAO Jiaxing, ZHANG Erhui18-255Experimental study on influencing factors of filling material performance of fly ash paste filling materialWANG Yuhuai, GAO Xiaoyan, QU Yanyang26-306Pollution assessment and health risk of middle groundwater in Sulin mining area, north Anhui provinceZHANG Wei, HAO Chunming, JIA Yanli31-387Research progress of magneto-caloric effect and magnetic refrigeration materialsFENG Haimei, WANG Junhong39-438Study on the influencing factors of residential window opening behavior in summer season in hot summer and warm winter regionLIN Mingbin, WU Jingshun, YU Hanwei, LIU Hongwei, ZHANG Changchang, LIU Yiqiao, PAN Song44-539Application of the low impact development concept in the construction of a residential area and road reconstructionDING Kun, SUN Zhipeng, ZHANG Yuan, ZHOU Yuxi, YAO Wei54-6010Study on alternative heat source for coal-fired boilers in small townsNIU Yongsheng61-6511Risk analysis of bridge hanging pipeline leakage based on FTAFAN Zisheng, PAN Yu66-7112A safe transmission technology of important information for emergency rescue based on baker' s transformationYU Shengchen, LI Ming, YAO Yu, BI Chongling72-7613Research and development of carbon monoxide monitoring instrument based on STM32ZHAI Yanzhong, MA Qiang, DENG Kaixuan77-8314Two improved algorithms for elliptic curve digital signatureLI Mingzhu, LIU Ruiqin84-87,10215Dynamic adaptive inertial weight particle swarm optimization algorithm based on chaos optimizationZHU Honggen, TIAN Liqin, CHEN Nan88-9516Research on risk monitoring and early warning of hazardous chemical production safetyLIU Mao96-10217Preliminary study on cancellation procedure of safety production licenseZHAO Jian103-107,11818An exploration and a new mode of emergency linkage:Beijing' s institutional reformGENG Xingyin, CHENG Genyin, WANG yao, ZHANG Changchang, LI Lin, HOU Jiayin108-11319Research on the age-based differentiated earthquake science popularization in JapanLI Hui, ZHAO Juan, LI Xiaoli, HUANG Mei114-11820Investigation and analysis of the status quo of safety culture in North China Institute of Science and TechnologyGUO Huan119-124 