1Management system and key technology in coal quality testGU Chuang1-52A study on how the temperature difference of heat capacity calibration and coal measurement affected the calorific valueGU Hong-wei6-93Study on method for coal size screen manual sampling and variation law of distribution of particle size in logistics processMI Fei, ZHANG Bo, TIAN Hao, WANG Jie-lin, ZHANG Heng10-134Discussion on the problems of certified ash fusibility reference materialsYANG Hua-yu14-15,235Study on the stability of plastic layer index of bituminous coal samplesSUI Yan16-18,386Research on technical improvement of mechanical sampling system of SDIC Jingtang portLIU Qing-lin, YANG Jin-xiang19-237Evaluation on the precision and bias of combined sampling machineLI A-wei, ZHANG Jing-xiang, ZHANG Lan-lan24-28,538Evaluation of uncertainty of the chlorine content determination in coal using Eschka methodZHAO Yan, WEI Ning29-339Coal blending proportion calculation for Kunming Steel using coal blending method of fuzzy set measureWEI Ya-ling, WANG Zhen, LI Dong, ZHANG Xue-mei, ZHANG Kun-gang34-3810Experimental research on coal characteristics of coal sample from Xinjiang Zhundong coalmineSU Guo-qing, YAO Wei, HE Hong-guang39-41,4411Coal quality characteristic of 7-2 seam in Pingshanhu area and its significance of Coal formation environmentJU Hui-jiao42-4412Coal quality evaluation of Henan Suixian west coalfieldCAO Cui45-48,5713Analysis of coal-bearing strata characteristics and sedimentary environment of Yushan coal mine in Wengan, GuizhouLI Shao-yong49-5314Introduction on influencing factors of Yan Ma Zhuang Mine's coal quality and process controlTANG Ming, WU Dan54-5715Study on the effect of the copper gauze spiral in carbon and hydrogen determination using three-stage furnace methodWANG Qiu-xiang58-6216Comparative analysis of measuring the nitrogen in coal based on semimicro kelvin method and infrared thermal conductivity methodLONG Ya-ping63-6517Discussion on feasibility of making the tolerance1 of commercial coal quality indexes more strictLI Wen-long, WANG Zhan-ming66-67,7118Comparison and discussion of two granularity characteristic equations on slime particle size distributionTANG Yi-chun, DING Guang-yao, WANG Dan, XUE Yu, LI Guang-hui, WU Da-wei68-71 