1Research on Xi Jinping's Important Exposition on the CPC History Leading College Ideological and Political Education in the New EraMENG Qinghe4-72Calculation and Optimization of Sliding Speed of No Traction Strop Based on Catenary TheoryZHAO Jiufeng32-35,783Design of Autonomous Battery Replacement System for Quadrotor UAVLI Sha, GAO Wei, FAN Yuting, CHENG Pengsheng36-394Scratch Detection of Metal Plate Surface Based on Federated Learning of Exotic DataCAI Jianfeng, BAI Junjie, XIANG Hongcheng, HU Lin, ZHOU Taoqi, GAO Shuai40-445Study on the Performance of New Flexible Photodetector with LED LaserCHAO Junfeng, XING Shumin, REN Gang45-486Improvement Design of Lathe Spindle Structure and Rolling SupportHAO LiJun, WANG Xiaoguang64-667Research on High Simulation Paper Currency Recognition Based on Color Space ConversionCAO Hui, PAN Qi, TANG Jiawei, XIE Rui, WEI Xiufei, ZHANG Guanfu73-788Simulation of Cross Warehouse Logistics Distribution Based on Adaptive Genetic Clustering AlgorithmLI Pingping79-829Design of Compressed Sampling Wideband Digital Receiver Based on Modulation Bandwidth ConverterYANG Fan83-8710An Analysis on the Application of Artificial Intelligence and Computer Network TechnologyYAO Fang88-90,12511Research on Prediction of Concrete Compressive Strength Based on Machine Learning TechnologyZHOU Yisong, ZHAO Chuanping, HUANG Yaoming, ZHU Li, CHENG Ming91-9512Discussion on Rapid Determination Method of Principal Stress Direction Under Plane Stress StateMIAO Guanghong, LU Xiaoyu, LUO Jian, WU Jianqiang101-10413Research on Recognition Method of Aerobics Athletes'Difficult Video MovementsHE Li, LI Huimeng, JIN Qingkai, ZHAO Shutong121-12514Value Analysis of Fitness Qigong Under the Background of"Integration of Sports and Medicine"LI Jie126-128