Conference on Smart Transportation and City Engineering最新文献_第10页

Numerical simulation of influence of section geometry on surrounding rock stability of arch tunnel with straight wall 直墙拱道断面几何形状对围岩稳定性影响的数值模拟

Conference on Smart Transportation and City Engineering Pub Date : 2022-12-22 DOI: 10.1117/12.2657861

Biao Wang, Yang Wang, Zhenhua Zhang, Shuai Tao

{"title":"Numerical simulation of influence of section geometry on surrounding rock stability of arch tunnel with straight wall","authors":"Biao Wang, Yang Wang, Zhenhua Zhang, Shuai Tao","doi":"10.1117/12.2657861","DOIUrl":"https://doi.org/10.1117/12.2657861","url":null,"abstract":"Based on the Mohr-Coulomb strain softening model, the nonlinear CWFS criterion of friction strengthening and cohesion weakening is adopted, and the deterioration behavior of tensile strength and stiffness modulus caused by tensile-shear coupling yield of intact rock mass is considered. Through two different modeling methods, the influence of geometric characteristics of straight wall arch tunnel section on the failure of surrounding rock and rock-burst is simulated. The results show that the geometric characteristics of tunnel section have obvious influence on the stability of surrounding rock. The rise-span ratios are 0.5, 0.297 and 0.16, and the height of straight wall is 0.875 m. The plastic zone, rock-burst zone, tensile yield zone and shear strain localization zone of surrounding rock decrease with the decrease of rise-span ratio. When the rise-span ratios are 0.5, 0.297 and 0.16, and the vertical wall heights are 0.875 m, 1.23 m and 1.47 m, respectively, the plastic zone, rock-burst zone, tensile yield zone and shear strain localization zone of surrounding rock increase significantly with the decrease of rise-span ratio. When the rise-span ratio is 0.16 and the straight wall height H4 = 1.47 m, the maximum shear strain increment is about 10-2 , which is an order of magnitude higher than other schemes. According to Russense rock-burst criterion and shear strain localization results, the rock-burst units are mainly concentrated in the top and bottom of the tunnel section, which is consistent with the rock-burst position recorded in the field tunnel.","PeriodicalId":212840,"journal":{"name":"Conference on Smart Transportation and City Engineering","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126748383","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A game study of stakeholders of smart transportation project in China 中国智慧交通项目利益相关者博弈研究

Conference on Smart Transportation and City Engineering Pub Date : 2022-12-22 DOI: 10.1117/12.2657921

Dong Wang, Yingjie Hu

引用次数: 0

An evaluation study on the combined effects of the ACC and AEB systems ACC与AEB系统联合效果的评价研究

Conference on Smart Transportation and City Engineering Pub Date : 2022-12-22 DOI: 10.1117/12.2657893

Xingfei Xing, Kai Wang

引用次数: 0

Multi-class identification of urban bus bunching rate based on XGBoost 基于XGBoost的城市公交集群率多类识别

Conference on Smart Transportation and City Engineering Pub Date : 2022-12-22 DOI: 10.1117/12.2658598

Qian Liu, Mei Xiao, X. Ming, Hongtao Huang

引用次数: 0

Dynamic monitoring system of prefabricated component production line based on digital twin 基于数字孪生的预制构件生产线动态监控系统

Conference on Smart Transportation and City Engineering Pub Date : 2022-12-22 DOI: 10.1117/12.2658288

Xinyi Liu, Ren-Kai Jiang, Xinqiu Wei, Guo-qiang Zhang, Linqian Tian, Ling Wang, X. Zheng

{"title":"Dynamic monitoring system of prefabricated component production line based on digital twin","authors":"Xinyi Liu, Ren-Kai Jiang, Xinqiu Wei, Guo-qiang Zhang, Linqian Tian, Ling Wang, X. Zheng","doi":"10.1117/12.2658288","DOIUrl":"https://doi.org/10.1117/12.2658288","url":null,"abstract":"With the rapid development of information technology, the manufacturing industry is transforming to digitization and intelligence. The realization of real-time interaction and data fusion between physical factory and virtual factory is one of the bottlenecks to realize intelligence. To avoid this issue, it is necessary to design a dynamic monitoring system of prefabricated component production line based on digital twin technology. The system architecture includes physical layer, data layer, virtual layer and application layer, and the interconnection of all levels of the monitoring system is realized by using information technologies such as the Internet of Things, PLC and MES. Through data integration display and virtual factory display, the on-site comprehensive monitoring and intelligent simulation analysis of the production line can accurately locate the abnormal conditions in the production process, which can provide early warning and optimization decisions quickly. The results show that the system can monitor and predict the production line in real time, and has good practicability, which can provide a reference for the realization of dynamic monitoring of the production line.","PeriodicalId":212840,"journal":{"name":"Conference on Smart Transportation and City Engineering","volume":"126 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126606990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Automated scenario generation and iterative regression testing method for autonomous driving systems 自动驾驶系统的自动场景生成与迭代回归测试方法

Conference on Smart Transportation and City Engineering Pub Date : 2022-12-22 DOI: 10.1117/12.2657984

Jianli Duan, Rui Wang, Shulian Zhao, Mengxia Hu, Hua Chen, Chuzhao Li, Hao Wu, Pengfei Bai, Yi Wang, Keqiang Li

引用次数: 0

Mechanical mechanism analysis of post-penetration grouting at soil-rock interface combined with digital image technology 结合数字图像技术的岩土界面侵彻后注浆力学机理分析

Conference on Smart Transportation and City Engineering Pub Date : 2022-12-22 DOI: 10.1117/12.2658656

Peng Zhao, Chao-yu Wang, Pengfei Yong, Yingli Wang, Xiaoming Li, Zhihui Chen

{"title":"Mechanical mechanism analysis of post-penetration grouting at soil-rock interface combined with digital image technology","authors":"Peng Zhao, Chao-yu Wang, Pengfei Yong, Yingli Wang, Xiaoming Li, Zhihui Chen","doi":"10.1117/12.2658656","DOIUrl":"https://doi.org/10.1117/12.2658656","url":null,"abstract":"Aiming at the weakening of the soil-rock interface, a permeable polymer is developed in this paper, which is analyzed by combining DIC and SEM techniques. The mechanism of mechanical properties of soil-rock interface strengthened by post-osmotic grouting was studied. Through direct shear test and DIC technology, the effects of different normal pressure, water content, interface dry-wet characteristics, and curing environment on mechanical properties of the soil-rock interface were analyzed. SEM and MIP tests were used to investigate the microstructure mechanism of the soil-rock interface reinforced by infiltration grouting. The results show that the permeable polymer can improve the shear strength of the soil-stone interface mainly by enhancing the cohesive strength of the interface. The normal pressure increases the interface friction, but the interface friction coefficient decreases with the increase of the normal pressure. The water content affects the grouting effect of the polymer, and the interfacial wetting property prevents the polymer from penetrating into the interfacial direction, thus reducing the bonding strength of the interfacial. Because of the permeability of permeable polymers, the effect of the water bubble curing environment on the shear properties of the interface is less than that of the interface wetting and drying properties. SEM and MIP tests verify that the polymer effectively fills the pores in the soil and reduces the average pore size of the soil.","PeriodicalId":212840,"journal":{"name":"Conference on Smart Transportation and City Engineering","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121496187","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Expressway cross-sectional flow prediction algorithm based on spatio-temporal data fusion 基于时空数据融合的高速公路横断面流量预测算法

Conference on Smart Transportation and City Engineering Pub Date : 2022-12-22 DOI: 10.1117/12.2658178

Xian Li, Qi Du, Jiachen Li, Lei Wang, Jiangfeng Wang

{"title":"Expressway cross-sectional flow prediction algorithm based on spatio-temporal data fusion","authors":"Xian Li, Qi Du, Jiachen Li, Lei Wang, Jiangfeng Wang","doi":"10.1117/12.2658178","DOIUrl":"https://doi.org/10.1117/12.2658178","url":null,"abstract":"The short-term traffic flow prediction is of practical significance for the operation and management of the expressway. Combining the traffic flow data collected from the expressway network in Shandong Province, the short-term traffic flow prediction of expressway sections is studied to provide support for the establishment of vehicles travel path selection model. Firstly, the spatio-temporal correlation of traffic flow is analyzed and the correlation coefficients are calculated. Secondly, the summation autoregression and average long-term and short-term memory models based on time series, and regression prediction model based on spatial correlation are selected to predict the traffic flow at the section. Finally, the weighted least squares method is used for the spatio-temporal data integration prediction. The prediction results show that the prediction accuracy of the spatio-temporal traffic flow data fusion algorithm is higher than that of the single prediction model. The average absolute percentage error of the data fusion algorithm is reduced to 8.127%, and the average absolute error and root mean square error are lower than those of the single prediction model. The combined prediction model improves the prediction accuracy.","PeriodicalId":212840,"journal":{"name":"Conference on Smart Transportation and City Engineering","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115139939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The evolution and redevelopment of Birmingham New Street Station and surrounding areas 伯明翰新街车站及周边地区的演变和重建

Conference on Smart Transportation and City Engineering Pub Date : 2022-12-22 DOI: 10.1117/12.2657821

Qianyu Du

{"title":"The evolution and redevelopment of Birmingham New Street Station and surrounding areas","authors":"Qianyu Du","doi":"10.1117/12.2657821","DOIUrl":"https://doi.org/10.1117/12.2657821","url":null,"abstract":"The fundamental function of railway station is a tool for rapid passage of people and goods. The long-distance transportation function would be paid more attention by designers, neither than aesthetics and integration with cities. The Birmingham New Street Station had a long history since establishment. The railway station, in common with many other industrialized zone, has experienced major changes over the last 100 years. It went through 4 stages, which was mainly used for freight transportation initially. After that, it gradually turned to a comprehensive transportation hub. And finally Birmingham New Street Station developed into an urban space with people-oriented, convenient travel and commercial vitality. It is necessary and valuable to analyze the evolution and redevelopment of the railway station. This paper is aimed to summarize the development trend and optimization strategy of railway stations in central urban area and surrounding areas. It makes an in-depth study on the development history of Birmingham New Street Station, the type and site selection of station buildings, the commercial development mode of the station and its surrounding areas, and the connection organization between the station and urban traffic. Suggestion for the further development of railway stations in central cities could be proposed.","PeriodicalId":212840,"journal":{"name":"Conference on Smart Transportation and City Engineering","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115248475","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research on optimization of passing the neutral section device vehicle body overvoltage of EMU at traction substation 牵引变电所动车组过中性段装置车体过电压的优化研究

Conference on Smart Transportation and City Engineering Pub Date : 2022-12-22 DOI: 10.1117/12.2657915

Tianshu Shi, Sihua Wang

引用次数: 0