1Application of S7 -200 PLC to control system of VM1400 vibration centrifugal dewater deviceZHANG Guang-chao, ZENG Fu-yang, WANG Wei-dong, ZHOU Zheng, WANG Ling-ling, MENG Yan-xiaDesign and Technology15-172Study on observations on underground pressure of special thick seam at full seam gateway in high stress areaLIU Jie-ying, MENG Xian-rui, WEN Rong-feng, ZHANG Bao-youDiscussion on Research61-633research on the treatment of coke plant wastewater by Bipolar Three- dimensional Fluidized Bed Electrode ReactorXU Ning, TAO Xiu-xiang, LV Ze-pengDiscussion on Research74-764Discussion for stability of power factor to SCR Excitation device to improve in Synchronous MotorHAN LiDiscussion on Research77-795Study on Making Hydrogen Behaviors of Coal Slime and Riverbed Sludge via PyrolysisZHANG Lei, SHU Xinqian, ZHAN Chuanxin, LI GangDiscussion on Research79-826Application of grey theory to predict railway transportation quantityLU HuiDiscussion on Research83-857Accuracy Analysis of Queueing Models having different Service Time DistributionsZHANG Ji-wen, WANG QingDiscussion on Research86-888On the Development of Cyclic Economy in Mineral Areas Promoted by Industry IntergrowthWANG Yong-sheng, ZHANG Yan-dongDiscussion on Research89-919Development of labyrinth Screw seal and application to mine main electric motors for mine water drainageDU Chun-ling, ZHAO Ting-zhao, LI Wei-xi, MENG Guo-yingNew Products96-9810Brief analysis on application of refuge chamber in mineZHAO Li-an, XU Zhen-liangNew Products99-10111Design on coal resources management information system base on B/S structureHAN Jing-rain, HAN Zuo-zhen, LI Zhi-yuanProject Management101-10312Design on mine safety monitoring and measuring system base on Lonworks busYU Bin, YIN Yan-qing, JIA Ya-qiongProject Management106-10813Risk assessment on international project bidding base on fuzzy AHPHONG Wei-min, Zhu Zhi-weiInformation Engineering111-11314Research on achievement and benefit assessment system for subsidiary of coal enterpriseYANG Guang-jun, WANG Li-jieInformation Engineering116-118 