1Formula of penetration stability failure of coal containing gasXIE Yan, WANG Zening, LU Qi, WANG Yong749-7522Study on hydraulic fracturing effect evaluation and outburst elimination time prediction in coalbed methane wellsLIU Gaofeng, WENG Hongbo, SONG Zhimin, LU Runsheng, REN Jiangang753-758,7833Determination the reasonable pressure dropping rate of CBM vertical wells in increasing production stageNI Xiaoming, HU Haiyang, CAO Yunxing, PANG Donglin, GUO Zhiqi759-7634Study on deformation mechanism and control technology of surrounding rock of variable and narrow coal pillar roadway along gob areaCHEN Xiaoxiang, FU Donghui, WANG Leichao764-7695Study on the stability of the judgment ventilating shaft by the stress difference methodYIN Shixian, PANG Lixin, WANG Hui, LI Dehai770-7766Geochronology research on zircon from kimberlite in Hebi region and its geological significanceHOU Guangshun, LI Ming, WU Chengbin, PANG Xucheng, XU Yajuan, ZHI Yunbao777-7837Study on paleoclimate and provenance of dinosaur fossils buried strata in Tantou basinZHU Shuhui, BAI Wanbei, QIAO Yu784-7908Mineralogical characteristics of bauxite deposits in Benxi formation of Yanshi country and Longmen town areaCAO Gaoshe, ZHANG Song, XU Guangming, DU Zhong791-7969Acquisition for prediction parameters of unconventional surveying monument under the condition of super sub-critical extraction in deep miningLI Chunyi, ZHANG Xu, YUAN Debao, GUO Zengzhang797-80110Error research on Gauss projection positive operatorFENG Difei, REN Qin, HU Shengwu802-80611Prediction of tool wear based on grey-Markov modelZHANG Changjuan, JIAO Feng, ZHAO Bo, NIU Ying807-81212Research progress of magnetic abrasive finishing technologyGAO Guofu, WANG Yan813-81713Research of swarm behaviors based on reformulated agent modelSONG Yunzhong, LIU Maoni818-82514Blurred faces recognition based on local phase quantization and FisherfacesCHU Jiuliang, YUAN Baohua, REN Mingwu826-83015SEMG feature recognition based on linear discriminant analysisWANG Hongqi, MAO Amin, LI Linwei831-83516Optimization of roughness loss formula of rectangular tunnel based on the integral formCHENG Lingfei, ZHANG Bingli, LU Nan836-84017Research on screening efficiency based on 3D discrete element methodMA Xuedong, ZHANG Yanbing, WANG Kefei, LIU Ying, JIANG Quanqiang841-84418Study on structure and wear of TiC, TiN and Al2O3 coated carbideWANG Zhiyang, CAO Wei, GUO Wei, ZHANG Yongxin845-849,87719Study on image enhancement based on detection of steel plate surface defectGAO Ruxin, YANG Xiaoxue, QI Cheng850-85420Design of fractional slot low speed high torque permanent magnetic synchronous motorWANG Xudong, WU Jun, XU Xiaozhuo, FENG Haichao855-859 