1Research progress of occurrence of high sodium coal and restrain of its fouling behaviorWANG Yue, DING Hua, BAI Xiang-fei, ZHU Chuan1-92The research of sulfur occurrence statusin of carboniferous coal in Tongchuan mining areaWEI Xiang-hua, YANG Zhi-yuan, SHI Yang10-12,423Relationship between the average maximum reflectance and the average random reflectivity of the cleaned coking coal vitriniteZHANG Yu-hong13-164Systematic study on quality change of Yitai 3 # coal in logistics chainHONG Wei, ZHANG Chun-tian, LI Ji-fei, ZHANG Heng17-21,265Discussion on the performance test of automatic coal sample preparation systemHU Biao, LUO Jian-ming, XIONG Zhi-ming, TAN Zhong-zhu22-266Application and practice of unattended full-automatic combined sampling machineMIN Xiong, WANG Ping, GAO Bo27-297Application of automatic and intelligent sampling machine in Qiandong power plantHOU Xiao-ming, LUO Jun, ZHANG Cheng30-32,358Application of proficiency testing in the quality control of coal testing laboratoryTU Jia-cai33-359Evaluation of uncertainty in the determination of true relative density of coalSONG Xing, XIE Xi-chao36-3910Developing of the power-outage protection device for coal sampling equipmentYANG Yang, ZHENG Bao-hui, WEI Yi-long, WANG Yang-yang40-4211Discussion on the common mining and supply in quality-price settlement between coal enterprises and customersZANG Ju-de, LIU Hao-tian, WANG Rong-ling43-4512Influence of self-made desiccator on determination of volatile matter content in coalWU Zeng-li46-4713Discussion on the working curvecalibration ofcoulomb sulfur analyzerJI Xue-ni48-4914Comparative Analysis of Determination of carbon, in coalFENG Tao, LIAN Jin-jing, CHEN Tong, TANG Zhao-guan, WANG Jun-hui50-52,5815The investment influence factors analysis on coal to olefin projectCHEN Jing-huan53-5816Analysis and Evaluation on operation efficiency of coal-fired industrial boilersZANG Guo-guang59-6117Principle and calculation of flow measurement for displacement air compressorLIU Wu-yi62-6418Practices of ultralow medium consumption 0.45 kg/t in Xinyi coal preparation plantJIANG Xiao-yong, CHEN Wei, LI Bao-ming, WANG Peng, WANG Hai-yan65-6819Transformation of middling coal scraper in Sunzhuang product department of Matou coal preparation plantWANG Yan-li69-7020Analysis on the calorific value of tail coal slime in coal preparation plant and corresponding measuresYANG Yu-shang71-72 