1Analysis and testing of wireless transmission attenuation in coal mine underground and research on the optimal operating frequency bandSUN Jiping, LIANG Weifeng, PENG Ming, ZHANG Gaomin, PAN Tao, ZHANG Hou, LI XiaoweiAcademic Column of Editorial Board Member1-82F5G industrial optical ring network communication technology and its application and prospect in coal minesZHAO Tingzhao, YUAN Shengfu, LI Chaofei, HOU Shangwu, HOU Zhentang, XIE ZhidongAcademic Column of Editorial Board Member9-143Research on intelligent hazard early warning architecture and key technologies for coal mineDING Zhen, LI Haodang, ZHANG QinghuaAcademic Column of Editorial Board Member15-224Research summary on coal industry internet technologyYANG Jun, ZHANG Chao, YANG Huifan, GUO YinanOverview23-325Research on key technologies of coal mine intelligent excavationLI Fei, ZHANG Lin, SHANG Yuqi, KONG Dezhong, WANG Yuliang, CHEN Long, ZHANG ZhiweiOverview33-416Research and prospect of UWB radar wave transmission attenuation based on borehole rescueWEN Hu, LIU Shengkai, ZHENG Xuezhao, CAI Guobin, HUANG Yuan, ZHANG HuiOverview42-497A scale-adaptive target tracking method for coal mine underground based on cloud-edge collaborationMU Qi, HAN Jiajia, ZHANG Han, LI ZhanliAnalysis and Research50-618An enhancement method for low light images in coal minesKONG Erwei, ZHANG Yabang, LI Jiayue, WANG ManliAnalysis and Research62-69,859A method for enhancing low light images in coal mines based on Retinex model containing noiseLI Zhenglong, WANG Hongwei, CAO Wenyan, ZHANG Fujing, WANG YuhengAnalysis and Research70-7710Intelligent decision-making method for coal caving based on fuzzy deep Q-networkYANG Yi, WANG Shengwen, CUI Kefei, FEI ShuminAnalysis and Research78-8511Autonomous positioning method for inspection robots in fully mechanized working faceHUANG Xiping, YANG FeiAnalysis and Research86-9112Intelligent recognition of coal and rock based on wavelet packet multi-scale fuzzy entropy and weighted KL divergenceLI YimingAnalysis and Research92-9813Miner action recognition model based on DRCA-GCNLI Shanhua, XIAO Tao, LI Xiaoli, YANG Fazhan, YAO Yong, ZHAO PeipeiAnalysis and Research99-105,11214Coal gangue target detection of belt conveyor based on YOLOv5s-SDEZHANG Lei, WANG Haosheng, LEI Weiqiang, WANG Bin, LIN JiangongAnalysis and Research106-11215An improved tiny YOLO v3 rapid recognition model for coal-gangueZHENG DaonengAnalysis and Research113-11916A dynamic coal quantity detection system for conveyor belt based on ultrasonic arrayHAO Hongtao, WANG Kai, DING WenjieAnalysis and Research120-12717Application of a quick drill pipe connection method in high-power electro-hydraulic drilling rigsXING Wang, LI Fen, WANG Ningfang, LI Dongsheng, LI WangnianAnalysis and Research128-13318Research and application of hydraulic slotting gas extraction technology in coal seams containing gangueLI Xiaoshen, LIU RuipengAnalysis and Research134-14019Non-repeated support advanced support intelligent control systemHAN Zhe, XU Yuanqiang, ZHANG Desheng, ZHAO Quanwen, DU Ming, LI Hui, ZHOU Jie, ZHANG Shuai, LIU Jie, GAO Jianxun, WEN Cunbao, ZHOU Xiang, ZHAO KaiAnalysis and Research141-146,15220Measurement of UWB signal path loss and center frequency selection in underground coal minesLYU RuijieAnalysis and Research147-152