1Analysis on the structure and pyrolysis characteristics of the lignite in Shaer Lake of XinjiangYUAN Chuan-jie, HUANG Xue-li1-42The characteristic analysis and change law of coal ash composition of coking coal in chinaBAI Xiang-fei, ZHANG Yu-hong5-7,163Study on the change law of caking property of different rank of coking coals blended with Shenfu coalZHNAG Yang8-114Evaluation on the uncertainty of carbon and hydrogen content determination in coal by infrared methodYAO Wen-song, WANG Xiao-yue, HU Xian-hui, WEN Yi-min, QIN Ling, LI Xiao-jiang12-165Evaluation on the uncertainty of Vanadium content determination in coal ash by ICP-OES methodJIANG Tao, LIU Wen-ping, YUAN Xiao-ying, HU Shou-peng17-196Analysis on characteristics of the coal seam of Gucheng No.1 mine field in Fugu county of Shaaxi ProvinceZHOU Yun20-217Constructions and applications of management systems of bought-in coal in Dawukou coal preparation plantYANG Yong-feng, ZHU Yan, YANG Xu-ri22-23,368Discussion on research of improvement of coal quality for Shaanxi Huangling No.2 coal mineZHANG Feng-qing24-25,619Analysis on the revised national standards Spot-check and Acceptance Methos of Commercial Coal QualityWANG Xing-wu26-27,3110Study on the performance of outer spiral binocular claw-type mechanical coal samplerZHANG Bo28-3111Application of certified reference materials in the determination of total sulfur of coal by Coulometry methodWU Zeng-li, FU Hao32-3312Comparative study on infrared spectroscopy method and Coulometric titration method for testing total sulfur of coalJIANG Chao34-3613Discussion on the influence of sample rate on the Hardgrove grindability index of coalWANG Jing-gang, LI Yan-xia, SHEN Zi-jin, CHEN Feng37-3814Disscusion on Influencing factors in the determination of the caking index of bituminous coalZHANG Lan-jun39-41,4615Selection and application of the algaecide for circulating water in calorimeterLU Hai-lai, GAO Jian-wen, ZHANG Heng, ZHAO Xiu-hong, Mi Fei42-43,5516Discussion on analyzing results of petrography analysis of coalWANG Yu44-4617Discussion on the influencing factors in the determination of calorific value and the measurements for improving the accuracyZHOU Xi-lin, LIU Fei, ZOU Fang47-4918Discussion on measurements for reducing the errors of coal quality tests in coal labsFENG Xue-mei49-5019Discussion on the designing and layout of KZG multistage open type filter and the selection calculation of corollary equipmentZHOU Zong-feng, ZHAO Xian-hua, ZHANG Hong-ling51-5520Transformation of coal slime water system in Lujiatuo coal preparation plantLIU Chun-rui56-58 