This paper describes the development and optimization plans for the China Railway Express(CR Express).As a new type of international land transport organization,CR Express has emerged with the continuous expansion of ...This paper describes the development and optimization plans for the China Railway Express(CR Express).As a new type of international land transport organization,CR Express has emerged with the continuous expansion of China toward European investment and trade,and in particular,has expanded with the continuous progress of the One Belt and One Road(OBOR)initiative.In addition to improving the service quality of CR Express,the operating costs must be reduced for developing“smart railways”that serve“smart cities”.We propose a dualobjective-based function mathematical optimization model;the satisfaction of the cargo owner is considered,and the timeliness,transportation capacity,and goods category constraints of CR Express transportation are designed.Moreover,we present the normalized equivalent method of the two-objective function of the model.Finally,a case study is conducted against the background of certain trains in the western corridor of CR Express to validate the effectiveness of the model and research methods proposed in this study.展开更多
The article describes the possibilities of application of simulation modeling for the analysis of infrastructure and technology of transport services of enterprises. The main technological and possible economic effect...The article describes the possibilities of application of simulation modeling for the analysis of infrastructure and technology of transport services of enterprises. The main technological and possible economic effects for the enterprises arising at performance of modeling of a transport component of their work are resulted.展开更多
Road Diets are far from a new technique for designers to apply to roadways. Yet after over 50 years of implementation and countless studies into their effectiveness, it is only relatively recently that the process is ...Road Diets are far from a new technique for designers to apply to roadways. Yet after over 50 years of implementation and countless studies into their effectiveness, it is only relatively recently that the process is gaining widespread recognition and implementation. Each year, more states and countries are examining potential road diets and putting them into place. Still, there remains great skepticism and opposition in many corners. In addition, cities and states may be drawing from many of the same sources in how to go about the process of a road diet and evaluate them, yet their methodology, goals, and even terminology can vary from region to region. This study analyzes the implementation of a road diet along a one-way arterial road, in Newark, Delaware. The primary aim of this analysis is to evaluate the feasibility of introducing a dedicated bicycle infrastructure to enhance local accessibility and to quantify its potential impacts on traffic flow, parking availability, and loading logistics within the vicinity. While the reduction of one lane could be perceived as a constraint on traffic management, the investigation revealed that E Main Street, the roadway analyzed, for the most part, can adequately accommodate its traffic load with a single lane. Detailed findings underscore the notable enhancement in level of service and subsequent reduction in delay times across most surveyed approaches.展开更多
为感知航班客舱保障过程各节点的动态演化机理,提出一种多马尔可夫链协同(synergy of multi-Markov chains, SMMC)的航班客舱保障过程预测方法。根据航班客舱保障的实际流程及相互约束关系,构建一种客舱保障过程节点协同的马尔可夫模型...为感知航班客舱保障过程各节点的动态演化机理,提出一种多马尔可夫链协同(synergy of multi-Markov chains, SMMC)的航班客舱保障过程预测方法。根据航班客舱保障的实际流程及相互约束关系,构建一种客舱保障过程节点协同的马尔可夫模型;基于历史数据作为样本并改进DBSCAN(density-based spatial clustering of applications with noise)聚类算法,设计面向客舱保障过程的DBSCAN-SMMC预测方法。选取国内某大型机场航班运行保障过程的实际运行数据开展仿真验证。研究结果表明,所提方法实现了各节点发生时刻的动态精准预测,其平均绝对误差的均值为0.606 min,均方根误差的均值为1.133 min,与其它方法相比平均绝对百分误差最少降低2%,拟合优度最大提升0.14,能够为机场运行精细化管理提供决策依据。展开更多
基金supported by the National Natural Science Foundation of China(Grant No.62102032,the R&D Program of Beijing Municipal Education Commission(Grant No.KM202211417010).
文摘This paper describes the development and optimization plans for the China Railway Express(CR Express).As a new type of international land transport organization,CR Express has emerged with the continuous expansion of China toward European investment and trade,and in particular,has expanded with the continuous progress of the One Belt and One Road(OBOR)initiative.In addition to improving the service quality of CR Express,the operating costs must be reduced for developing“smart railways”that serve“smart cities”.We propose a dualobjective-based function mathematical optimization model;the satisfaction of the cargo owner is considered,and the timeliness,transportation capacity,and goods category constraints of CR Express transportation are designed.Moreover,we present the normalized equivalent method of the two-objective function of the model.Finally,a case study is conducted against the background of certain trains in the western corridor of CR Express to validate the effectiveness of the model and research methods proposed in this study.
文摘The article describes the possibilities of application of simulation modeling for the analysis of infrastructure and technology of transport services of enterprises. The main technological and possible economic effects for the enterprises arising at performance of modeling of a transport component of their work are resulted.
文摘Road Diets are far from a new technique for designers to apply to roadways. Yet after over 50 years of implementation and countless studies into their effectiveness, it is only relatively recently that the process is gaining widespread recognition and implementation. Each year, more states and countries are examining potential road diets and putting them into place. Still, there remains great skepticism and opposition in many corners. In addition, cities and states may be drawing from many of the same sources in how to go about the process of a road diet and evaluate them, yet their methodology, goals, and even terminology can vary from region to region. This study analyzes the implementation of a road diet along a one-way arterial road, in Newark, Delaware. The primary aim of this analysis is to evaluate the feasibility of introducing a dedicated bicycle infrastructure to enhance local accessibility and to quantify its potential impacts on traffic flow, parking availability, and loading logistics within the vicinity. While the reduction of one lane could be perceived as a constraint on traffic management, the investigation revealed that E Main Street, the roadway analyzed, for the most part, can adequately accommodate its traffic load with a single lane. Detailed findings underscore the notable enhancement in level of service and subsequent reduction in delay times across most surveyed approaches.
文摘为感知航班客舱保障过程各节点的动态演化机理,提出一种多马尔可夫链协同(synergy of multi-Markov chains, SMMC)的航班客舱保障过程预测方法。根据航班客舱保障的实际流程及相互约束关系,构建一种客舱保障过程节点协同的马尔可夫模型;基于历史数据作为样本并改进DBSCAN(density-based spatial clustering of applications with noise)聚类算法,设计面向客舱保障过程的DBSCAN-SMMC预测方法。选取国内某大型机场航班运行保障过程的实际运行数据开展仿真验证。研究结果表明,所提方法实现了各节点发生时刻的动态精准预测,其平均绝对误差的均值为0.606 min,均方根误差的均值为1.133 min,与其它方法相比平均绝对百分误差最少降低2%,拟合优度最大提升0.14,能够为机场运行精细化管理提供决策依据。
