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

Freight traffic of civil aviation volume forecast based on hybrid ARIMA-LR model 基于ARIMA-LR混合模型的民航货运量预测

Conference on Smart Transportation and City Engineering Pub Date : 2022-12-22 DOI: 10.1117/12.2657975

Bin Chen, Jiacheng Liu, Zhouying Ruan, Ming Yue, Hansen Long, Weiping Yao

{"title":"Freight traffic of civil aviation volume forecast based on hybrid ARIMA-LR model","authors":"Bin Chen, Jiacheng Liu, Zhouying Ruan, Ming Yue, Hansen Long, Weiping Yao","doi":"10.1117/12.2657975","DOIUrl":"https://doi.org/10.1117/12.2657975","url":null,"abstract":"Freight traffic of civil aviation has developed rapidly because of its advantages of fast transportation speed and high safety. The fluctuation of freight traffic of civil aviation has brought many challenges to air traffic scheduling. If the freight traffic of civil aviation volume can be accurately predicted, the difficulty of air traffic scheduling will be reduced and the transportation efficiency of air cargo will be improved. The current prediction model can’t properly respond to the impact of emergencies. And it is not sensitive to the trend variations caused by policies, epidemics and other factors. In this paper, based on the autoregressive integrated moving average model (ARIMA) and linear regression model (LR), a hybrid ARIMA-LR model is proposed by using an improved Bayesian combined model. Through the prediction of the actual freight traffic of civil aviation volume, it is found that the hybrid ARIMA-LR model can not only better adapt to the changes caused by emergencies, but also have higher overall prediction accuracy than the ARIMA model and LR model. The three indicators of mean absolute error (MAE), mean square error (MSE) and mean absolute percentage error (MAPE) of the hybrid ARIMA-LR model are 1.06,29.02,0.03 lower than that of the ARIMA model; compared with the LR model, it is reduced by 3.00,92.00,0.06.","PeriodicalId":212840,"journal":{"name":"Conference on Smart Transportation and City Engineering","volume":"6 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":"121813600","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

Research on transportation risk prediction method based on coupling analysis 基于耦合分析的运输风险预测方法研究

Conference on Smart Transportation and City Engineering Pub Date : 2022-12-22 DOI: 10.1117/12.2657849

Mingkuan Wu, Huaili Chen

引用次数: 0

Research on risk assessment of large-span steel structure project construction phase based on variable weight-two dimensional cloud model 基于变重二维云模型的大跨度钢结构工程施工阶段风险评估研究

Conference on Smart Transportation and City Engineering Pub Date : 2022-12-22 DOI: 10.1117/12.2658181

Hou Feng, Weizhen Ma, Haiyan Wen

{"title":"Research on risk assessment of large-span steel structure project construction phase based on variable weight-two dimensional cloud model","authors":"Hou Feng, Weizhen Ma, Haiyan Wen","doi":"10.1117/12.2658181","DOIUrl":"https://doi.org/10.1117/12.2658181","url":null,"abstract":"As an all-round emerging branch of the construction industry, large-span steel structure engineering has a long on-site construction period, complex on-site construction process, and a series of uncertain unfavorable factors. The resulting risks will directly affect the smooth progress of large-span steel structure projects. In order to improve the effective control of risks in the construction stage of long-span steel structures, a risk assessment model for the construction stage of long-span steel structures based on variable weight theory is proposed. The WSR system method is used to analyze the construction risks, and a comprehensive evaluation index system for risks in the construction stage of large-span steel structures is constructed. With the help of the variable weight comprehensive model, the two-dimensional cloud model is used to comprehensively evaluate the risks of the large-span steel structure in the construction stage from the two dimensions of risk hazard and risk probability. Finally, the two-dimensional cloud image is drawn through MATLAB and the fit degree is calculated to further determine the evaluation result. Taking a large-span steel structure stadium in Lanzhou City, Gansu Province as the research object, a comprehensive assessment of the risks of the large-span steel structure construction stage was carried out, confirm the applicability and effectiveness of the model.","PeriodicalId":212840,"journal":{"name":"Conference on Smart Transportation and City Engineering","volume":"87 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":"126188345","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