1Research on the Application of Airspace Surveillance System in ChinaWANG Xingge, YANG Qingxiang1-32The Reasons of Low Visibility and Safe Operation Measures in Kunming Changshui International Airport in Angle of Extreme Weather Evolution Regulation and Geographical EnvironmentZHANG Xu4-83The Influence of Gap on the Detection of Weld Penetration Depth in Pulsed Gas Metal Arc WeldingDING Lin, BAI Pengfei, WANG Zhijiang9-12,1054Design of Speed Measurement and Frequency Tracking Algorithm for Ultrasonic Motor Based on DSPYOU Xiangyang13-16,605Maximum Power Point Tracking Simulation of Photovoltaic Modules Based on MatlabZHANG Kang, XU Liang, ZHU Xianhui, SHI Nan, DONG Ruilin17-19,646Study on Optimization Measures of Four Row Cylindrical Roller Bearings Influenced by Rolling Mill Speed IncreasingJIA Songyang, WANG Pengwei, FAN Qiang20-23,867The Design of Automobile Power Source Protective System ——Take Multi-function Communication Vehicle as an ExampleWANG Lei24-278Synthesis of Methyl 3-I-N-Cbz-L-TyrosinateLIU Nana, HUANG Yuchang, HAO Haijing, WANG Jiaxian, LI Shengtong, FAN Wenjing, SUN baoping28-319Efficiency Optimization for the Cell Pack Transient Expression SystemHAN Juan, MIAO Guopeng, ZHANG Kegui, WANG Chengrun, WANG Shunchang32-3610The Present Situation and Analysis of Domestic Classification DustbinLI Hang, XU Yuanyuan37-3911Determination of the Best Ornamental Position of the Productive Landscape in Multi-viewpoint CountrysideZHANG mingming46-4912Automatic Evaluation Method of Garden Plant Landscape Aesthetics based on Fuzzy Set TheorySHUI Yuan50-5313An Improved Sentiment Orientation Discriminant AlgorithmWU Fei, GUO Rujing54-5614Research on Three-dimensional Path Planning of Robotics by Integration Grid Method and Artificial Potential Field MethodGE Xiaohan57-6015Design and Simulation of M-Bus Host Interface Circuit Based on MultisimZHAI Yafang, GONG Yinmiao61-6416Experimental Study on the Effect of Sand Ratio on the Performance of Permeable BrickCHEN Xiaoxia, LIU Zhibin65-6817TBM Construction method of long-distance Tunnel in Deep-buried soft-hard interbedded GeologyZHAO Weidong69-72,9518Application Analysis of Undrained Sinking Construction Technology in Sink Well Engineering of Drainage Pumping StationDENG Mingli73-7519Study on Open-cut Construction Procedure and Construction Technology of Tunnel EntranceLIU Xiaofen76-7920Research on the Protection Strategy of Quanzhou"Dayaobairen"Original SkilsWU Yuehua80-83 