Frontiers of Traffic and Transportation Engineering最新文献_第6页

Regional accident consequence simulation and risk assessment in the port area 港区区域事故后果模拟与风险评估

Frontiers of Traffic and Transportation Engineering Pub Date : 2022-11-21 DOI: 10.1117/12.2652498

Yamei Zeng, Yuan Gao, Chunlei Zeng, Guoqing Sun

引用次数: 0

Q-learning for the speed trajectory optimization of the freight train 货运列车速度轨迹优化的q -学习

Frontiers of Traffic and Transportation Engineering Pub Date : 2022-11-21 DOI: 10.1117/12.2652584

Xuan Lin, Zhicheng Liang, Tiesheng Yan, Taiqiang Cao, Hua Cheng, Jian Mao, Rui Deng

{"title":"Q-learning for the speed trajectory optimization of the freight train","authors":"Xuan Lin, Zhicheng Liang, Tiesheng Yan, Taiqiang Cao, Hua Cheng, Jian Mao, Rui Deng","doi":"10.1117/12.2652584","DOIUrl":"https://doi.org/10.1117/12.2652584","url":null,"abstract":"The train speed trajectory optimization (TSTO) aims at finding the optimal speed trajectory considering the safety, energy efficiency, punctuality and stopping accuracy. From the perspective of mitigating the greenhouse effect, it’s quite significant to study the TSTO problem. This paper proposed an optimization algorithm based on Reinforcement Learning (RL). Firstly, a global optimization model using RL was established. In the model, the control sequence including the control regimes and their switching points was taken as the state. The optimization objectives were taken as the reward function. The adjustment of the position of the switching points in the control sequence was taken as the decision space of the agent. Secondly, an adjustment method of the control sequence based on the deep Q-learning and embedding matrix was proposed. The training data was sampled using the experience replay. The optimal control sequence was obtained through the iterative training of the neural network. Finally, the optimization algorithm based on RL was compared with the driving strategies based on the Pontryagin’s Maximum Principle (PMP) and the field test data. The results show that the energy consumption of the proposed algorithm is reduced by 0.16% in comparison with that of the PMP, which proves that the proposed method can be applied to the multi-objective optimization of the train operation. Comparing with the field test data, the energy consumption of the optimization algorithm is reduced by 4.89%, which demonstrates that the proposed method can be used to guide the drivers to drive the freight train energy-efficiently.","PeriodicalId":116712,"journal":{"name":"Frontiers of Traffic and Transportation Engineering","volume":"331 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123398521","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

Prediction of the demand for senior crews of Chinese sea-going vessels based on the combined forecasting method 基于组合预测法的中国海船高级船员需求预测

Frontiers of Traffic and Transportation Engineering Pub Date : 2022-11-21 DOI: 10.1117/12.2652818

Peng Zhang, Zhuo Sun, Yi-Huei Su, L. Lv

引用次数: 0

Study on the location of regional emergency logistics centre based on improved backtracking algorithm 基于改进回溯算法的区域应急物流中心选址研究

Frontiers of Traffic and Transportation Engineering Pub Date : 2022-11-21 DOI: 10.1117/12.2652324

Hao-ge Ma

引用次数: 0

Design of distribution station under the background of urban rail transit 城市轨道交通背景下的配电站设计

Frontiers of Traffic and Transportation Engineering Pub Date : 2022-11-21 DOI: 10.1117/12.2652702

Xinhong Lv, Xinyi Lu, Huaqiong Liu

引用次数: 0

Optimization of seaport companies' D&A systems based on system dynamics and evaluation models 基于系统动力学和评价模型的港口企业研发系统优化

Frontiers of Traffic and Transportation Engineering Pub Date : 2022-11-21 DOI: 10.1117/12.2652356

Yiming Shao, Jiayi Guo, Zejun Li, Wen Yan, Zhiyi Zhu

{"title":"Optimization of seaport companies' D&A systems based on system dynamics and evaluation models","authors":"Yiming Shao, Jiayi Guo, Zejun Li, Wen Yan, Zhiyi Zhu","doi":"10.1117/12.2652356","DOIUrl":"https://doi.org/10.1117/12.2652356","url":null,"abstract":"Integrated data and analytics (D&A) systems are recognized for their ability to help companies ensure they have the right people, technology, and processes in place to manage, operate, use, and protect data resources. It is critical for port companies to develop the right strategy to refine the architecture of their D&A systems and integrate their data resources.In this study, system dynamics simulation, and principal component analysis are used to help seaport companies improve D&A systems and maintain their competitiveness in the future. First, starting from the three key parts of personnel, technology, and process, a 3zy comprehensive evaluation model is developed to evaluate the maturity of the D&A system. Second, we use Vensim to conduct simulations and build a seaport system dynamics model. Then, analyze the causal relationship between various influencing factors, and explore the influence of various factors on the port. Third, through the principal component analysis method, clustering multiple indicators to determine the overall skill level of the company and the degree of cooperation between people, technology, and processes has an important impact on the D&A system. Finally, a sensitivity analysis is carried out to calculate the degree of influence on the analysis indicators when the uncertain factors change. The conclusions obtained show the scalability of the D&A system maturity model in other ports and industries.","PeriodicalId":116712,"journal":{"name":"Frontiers of Traffic and Transportation Engineering","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126074871","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

Extraction and visualization of highway operation status indicators based on toll data 基于收费数据的高速公路运行状态指标提取与可视化

Frontiers of Traffic and Transportation Engineering Pub Date : 2022-11-21 DOI: 10.1117/12.2652841

Feihu Ma, Sanguan Mei, Shiqi Deng

引用次数: 0

Research on supply and demand of senior crew in coastal area based on combination forecast 基于组合预测的沿海地区高级船员供需研究

Frontiers of Traffic and Transportation Engineering Pub Date : 2022-11-21 DOI: 10.1117/12.2652374

Yi-Huei Su, Zhuo Sun, L. Lv

{"title":"Research on supply and demand of senior crew in coastal area based on combination forecast","authors":"Yi-Huei Su, Zhuo Sun, L. Lv","doi":"10.1117/12.2652374","DOIUrl":"https://doi.org/10.1117/12.2652374","url":null,"abstract":"In the face of the shortage of crew labor in the shipping market and the rising shipping companies, it is necessary to analyze the supply and demand situation in my country to ensure that the Chinese crew can develop in the direction of the dynamic balance of supply and demand. The senior crew put forward an effective labor resource allocation plan to improve shipping talents training program. Based on the number of in-service crew members of ships of 3,000 gross tonnages and above in my country's coastal navigation areas and the number of valid certificates held by senior crew members in each position, the actual number of in-service crew members will be used for demand. With the number of crew members holding valid certificates as the supply, a linear weighted combination prediction model based on quadratic exponential smoothing method, regression prediction method, and GM (1,1) grey prediction method is established to predict the number of senior seafarers for 2020-2026. Experimental research shows that from 2020 to 2026, the supply and demand of senior seafarers in my country's coastal areas are on the rise, but the supply is in short supply. In response to the problem of unbalanced development of supply and demand, it is necessary to strengthen school-enterprise cooperation, improve the attractiveness of seafarers, and pay attention to the career development planning of seafarers.","PeriodicalId":116712,"journal":{"name":"Frontiers of Traffic and Transportation Engineering","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133427366","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

Liner ship speed optimization based on the influence of emission control area in waterway transport system 基于排放控制区影响的水路运输系统班轮航速优化

Frontiers of Traffic and Transportation Engineering Pub Date : 2022-11-21 DOI: 10.1117/12.2652536

Jin Gao, Shuo Wang, Tao Liu, Z. Lei, Wei Meng

引用次数: 1

Evaluation of financing scheme of railway construction project based on improved fuzzy AHP 基于改进模糊层次分析法的铁路建设项目融资方案评价

Frontiers of Traffic and Transportation Engineering Pub Date : 2022-11-21 DOI: 10.1117/12.2652559

Chang-Jie Chen

{"title":"Evaluation of financing scheme of railway construction project based on improved fuzzy AHP","authors":"Chang-Jie Chen","doi":"10.1117/12.2652559","DOIUrl":"https://doi.org/10.1117/12.2652559","url":null,"abstract":"China's railway development coincides with the comprehensive deepening reform. In order to promote the smooth completion of construction projects by adopting the best financing scheme, aiming at the technical problems that the financing scheme of railway construction projects is difficult to determine, on the basis of constructing the evaluation index system of project financing scheme, and based on the improved analytic hierarchy process and fuzzy comprehensive evaluation method, the evaluation index weights are determined from the angles of financing structure, financing cost, financing risk, profitability and viability. Then, the comprehensive evaluation of the financing scheme of railway construction project is carried out, and the effectiveness of the proposed method is verified by taking the Shanghai-Jiaxing-Ningbo railway project as an example. Combined with the evaluation results, relevant suggestions that are beneficial to the smooth implementation of the project are put forward. The results show that the proposed method can effectively evaluate the financing scheme of railway construction projects, and the corresponding research results can provide reference for the investment and financing of railway construction projects.","PeriodicalId":116712,"journal":{"name":"Frontiers of Traffic and Transportation Engineering","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129825775","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