1The Structural Stability and Elastic Properties of Ti4Nb3Al9 from First-Principles CalculationsDU Yulei, LU Xiaoyang, OU Yuanyuan, WANG ShunExperts Column1-52Recovering Valuable Metals from Spent Li-ion Batteries Witt Malic AcidZHOU Tao, XU Liping, FAN Bailin, LUO Chuanbao, PAN MingxiExperts Column6-123Secondary Rechargeable Battery of Foamed Nickel-based Polyaniline with Zinc Acetate-Lithium Acetate as ElectrolyteSI Shihui, ZHAO Zhijia, XIA Yang, LAN Changhua, LIU HaiExperts Column13-184Preparation of Dawson Type Phosphotungstic Acid Hybrid Materials [Co(2,2'-bipy)3]3(P2W18O62) and Its Adsorption PropertiesYANG Shuijin, CHEN Xiuyun, WANG WeikunExperts Column19-255Technological Analysis of Interchange Ramp on Huaixu Expressway of East Xuzhou with Large Cross Section CRD Construction MethodMA Fenghai, CHEN XiaExperts Column26-306Forecasting Method of Highway Visibility in Foggy WeatherLONG Kejun, LI Chaoqun, MAO Xuejun, HU YutingExperts Column31-377Preparation of Compound Instant-powder of Pumpkin by Composite Enzymatic MethodMA Lihua, SONG Hui, CHEN Xuehong, XIA YunExperts Column38-438Study on Preparation Technology of Osmanthus Burdock Crisp SlicesLI Yong, CHEN Shanglong, ZHENG Yi, XU Ziyu, WANG Fei, ZHOU WenhuiExperts Column44-489An Improved Algorithm of Dial Simulation Based on Effective PathLIU Zhixiang, CHEN Mingming, GU JinweiTheoretical Study49-5310Effect of Heat Treatment on the Microstructure of the Plasma GH416 9 Superalloy CoatingLI Hong, CHENG Lin, LUO GangTheoretical Study54-5811Synthesis of Alkyl Tertiary Amines and the Characterization and Properties of its New CatalystsPAN Mingxi, LUO Chuanbao, XU Liping, ZHOU Tao, YANG Xinwei, CHONG Chang, ZHOU KangyuTheoretical Study59-6612Transint Dynamic Analysis of Actual Digging Operation Process of Hydrolic ExcavatorYANG Yufeng, MA Ruiyong, ZHANG Zhiyang, DONG Binjie, LIU Bo, JIANG WenguangTheoretical Study67-7213Numerical Simulation of Asphalt Concrete's Porosity Variation under Dynamic LoadingZHANG Dongchang, LI YaEngineering Technology73-7614Experimental Study on Combined Purification of Dyeing Industry Wastewater by ABR-Two-stage Biological Contact OxidationCAO Wenping, YIN Honggui, TANG Zixia, WANG Xu, WANG YinmeiEngineering Technology77-8115Effects of Internal Fertilization of Cake Fertilizer on the Fermentation of Organic FertilizerPENG Yu, KAN Hongwei, DAI Hui, LI Zhanghai, DING Ting, WU Li, QI YongxiaEngineering Technology82-8816Electrical Test of Frames and Beams of a Certain School BusWANG Kaiqiang, ZHENG Zaixiang, ZHANG Zhenyue, CAI Weijiang, LU Qiuyi, XU PengEngineering Technology89-92 