scholarly journals Research on Hub-and-Spoke Transportation Network of China Railway Express

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Yinying Tang ◽  
Si Chen ◽  
Guangyu Lu ◽  
Qisheng Zhang
Keyword(s):  
Transportation Network ◽  
Vital Role ◽  
Median Problem ◽  
Allocation Model ◽  
Hub And Spoke ◽  
Organization Mode ◽  
Actual Operation ◽  
China Railway ◽  
Transportation Organization ◽  
Point To Point

China Railway Express is developing rapidly, but the point-to-point direct organization mode has brought many problems to it. Therefore, this paper proposes to construct a hub-and-spoke network and adopt the “collecting and transportation” organization mode. In this paper, based on the single distribution p-hub median problem, a dual-objective planning model was constructed by considering the characteristics of CR Express in terms of cost and time. In addition, considering the port as a key node of international rail transport network, it plays a vital role for CR Express. Therefore, a hub-port allocation model was constructed to determine the hub-port allocation relationship. Furthermore, a Lagrangian relaxation heuristic algorithm was designed to solve the model built for CR Express transportation network. Finally, based on the constructed model, the actual operation data of CR Express were used in the designed example to verify the effectiveness and applicability of the models and methods.

Network Planning Location Model for China Railway Express

2019 ◽  
Vol 2673 (2) ◽  
pp. 263-274 ◽  
Author(s):  
Yuehui Wu ◽  
Chang Lin ◽  
Jingyu Huang
Keyword(s):  
Network Planning ◽  
Location Model ◽  
Hub Location ◽  
Transportation Mode ◽  
Hub And Spoke ◽  
Organization Mode ◽  
China Railway ◽  
Transportation Organization ◽  
Further Development

With the gradual implementation of the Belt & Road Initiative, China Railway Express (CRExpress) has gradually gained support as an important transportation mode between China and Europe. However, the high cost of operation, caused by the unscientific organization mode and the small quantity of returning cargo, hinders the further development of CRExpress. Prior studies have shown that applying the hub-and-spoke transportation organization mode to the CRExpress system could decrease operational cost effectively. To carry out network planning for CRExpress, based on its present situation and properties, a conventional hub location model is adjusted. The network planning location model for CRExpress which minimizes total operation cost and allows direct transportation mode is proposed as well as an algorithm based on the genetic algorithm (GA) approach. The reasonableness and feasibility of the model and algorithm are investigated and verified through a case study based on the CRExpress system. The result indicates that Chengdu, Yingkow, and Zhengzhou are selected as consolidation centers whereas Urumqi and Xining adopt direct transportation mode.

scholarly journals Designing Hub-and-Spoke School Bus Transportation Network: A Case Study of Wonkwang University

1970 ◽  
Vol 24 (5) ◽  
pp. 389-394 ◽  
Author(s):  
Jun-Hyuk Kim ◽  
Soonhu Soh
Keyword(s):  
Optimization Problem ◽  
Transportation Network ◽  
Combinatorial Optimization Problem ◽  
School Bus ◽  
Median Problem ◽  
Hub And Spoke ◽  
Total Travel Time ◽  
Operational Constraints ◽  
Bus Transportation

This paper provides a case study of hub-and-spoke school bus transportation network design. The case study here utilizes a mathematical model that is the P-median optimization model to determine optimal hub locations. The P-median problem is a combinatorial optimization problem that includes many binary variables and constraints. The selected objective of the model is to minimize the total travel time satisfying other operational constraints. To elevate usability of decision making in the future, we implement the simulation model through the template model in spreadsheet platform. The developed model is used as a future reference to find operational directions of school bus managing policy and also tested on the case of Wonkwang University.

Why China must build Sichuan-Tibet railway: From the perspective of regional comprehensive transportation network optimization

2021 ◽  
pp. 1-23
Author(s):  
Junxiang Xu ◽  
Jingni Guo ◽  
Yongdong Sun ◽  
Qiuyu Tang ◽  
Jin Zhang
Keyword(s):  
Simulated Annealing ◽  
Simulated Annealing Algorithm ◽  
Programming Model ◽  
Transportation Network ◽  
Policy Recommendations ◽  
Hub And Spoke ◽  
Passenger Transportation ◽  
The Future ◽  
Annealing Algorithm ◽  
Transportation Organization

We not only firstly applied the theory of hub-and-spoke network to the field of integrated transportation network planning, but also combined our proposed method with Sichuan-Tibet railway, one of super large projects in China, to discuss the optimization and the layout of hub-and-spoke integrated transportation network along the Sichuan-Tibet railway after it is put into operation in the future and put forward some directional policy recommendations. In our study, we have made clear the topological structure of the multi hub and single allocation hybrid hub-and-spoke integrated transportation network in the passenger transportation corridors, established the integer programming model aiming at the minimum generalized travel cost in the network, and we designed the simulated annealing algorithm to solve this problem. In the empirical study, we find that if 5 nodes are selected as hub nodes in hub-and-spoke integrated transportation network, the generalized cost of network travel will be minimized and these specific location of 5 hub nodes can be determined by the selecting principle of hub nodes location, which we proposed in our study. The simulated annealing algorithm can help us to find the connection relationship between nodes. Then we can achieve three types of hub-and-spoke integrated transportation network layout patterns with railway, highway and aviation as the hub nodes. Though further comparative analysis, we find that it is more feasible to choose the integrated transportation network with railway nodes as the hub in transportation organization. Based on this understanding, we put forward policy recommendations on transportation organization to support high-quality planning and operation of integrated transportation network to Sichuan Tibet region in China in the future.

scholarly journals Map Reduce Based Optimized Frequent Subgraph Mining Algorithm for Large Graph Database

2020 ◽  
Vol 9 (3) ◽  
pp. 3131-3139
Keyword(s):  
Distributed System ◽  
Real World ◽  
Transportation Network ◽  
Vital Role ◽  
Graph Database ◽  
Frequent Subgraph Mining ◽  
Large Graph ◽  
Subgraph Mining ◽  
Frequent Subgraph ◽  
Centralized System

Distributed System, plays a vital role in Frequent Subgraph Mining (FSM) to extract frequent subgraph from Large Graph database. It help to reduce in memory requirements, computational costs as well as increase in data security by distributing resources across distributed sites, which may be homogeneous or heterogeneous. In this paper, we focus on the problem related complexity of data arises in centralized system by using MapReduce framework. We proposed a MapReduced based Optimized Frequent Subgrph Mining (MOFSM) algorithm in MapReduced framework for large graph database. We also compare our algorithm with existing methods using four real-world standard datasets to verify that better solution with respect to performance and scalability of algorithm. These algorithms are used to extract subgraphs in distributed system which is important in real-world applications, such as computer vision, social network analysis, bio-informatics, financial and transportation network.

Decision onRegional Logistics Network Based on H-S and P-P Network: Taking Tobacco Transportation Logistics as anExample

2021 ◽  
Vol 7 (6) ◽  
pp. 5340-5353
Author(s):  
Wang Bangjun ◽  
Wei Yixi ◽  
Ji Feng ◽  
Zhu Wei ◽  
Yu Pan
Keyword(s):  
Fixed Cost ◽  
Particle Swarm Algorithm ◽  
Cost Difference ◽  
Hub And Spoke ◽  
Total Cost ◽  
Logistics Network ◽  
Logistics Enterprise ◽  
Transportation Logistics ◽  
Point To Point ◽  
The Cost

Objectives: The logistics hub construction has always been the short board of logistics network planning in China. In order to improve the decision-making efficiency of logistics enterprise’s hub selection and reduce its comprehensive operation cost, this paper establishes a cost difference model for hub-and-spoke(H-S) and point-to-point(P-P) networks considering the fixed cost of hubs, transportation and route costs based on the 0-1 integer nonlinear programming. The model aims at minimizing the cost difference between the two networks, and divides the fixed cost of the hubs into three situations: full lease, lease and self-built, and fully self-built. Finally, this paper takes tobacco transportation logistics as an example, and use particle swarm algorithm to solve the model by using tobacco transportation logistics data of a logistics enterprise in Jiangsu Province. The results show that: (i) in the case of complete leasing, the total cost of the H-S network decreases with the increase of the number of hubs, and the cost change has a point of intersection with the total cost of the P-P network;(ii) when the lease and self-build are mixed, the increase is first reduced and then increased, it is U-shaped and has a minimum value, and there are two intersections with the total cost of the P-P network;(iii) the situation of completely self-built and fully leased is just the opposite. This paper takes tobacco transportation logistics as a representative, and provides a reference for logistics companies to choose the appropriate regional logistics network structure and different pivot points.

scholarly journals Distribution Organization Optimization for Inbound China Railway Express at Alataw Pass Railway Station

2019 ◽  
Vol 11 (24) ◽  
pp. 6914
Author(s):  
Wenqian Liu ◽  
Xiaoning Zhu ◽  
Li Wang
Keyword(s):  
Main Idea ◽  
High Volume ◽  
Long Distance ◽  
Railway Station ◽  
Existing Problems ◽  
Operation Process ◽  
Belt And Road ◽  
China Railway ◽  
Transportation Organization ◽  
The Belt And Road

Recently, in the context of “The Belt and Road” Initiative, the China Railway Express, which has a high volume and spans a long distance has greatly facilitated the construction of international freight transport corridors between developed and developing countries. To ensure sustainable development, this paper introduces an optimization problem of a container distribution organization scheme for the China Railway Express resulting from the major existing problems arising in railway port stations, which is a special and crucial link in transportation organization of the China Railway Express. The problem of a long dwell time of inbound trains is typically concerned with the operation process in railway port stations. Taking various real-world influencing factors of efficiency into account, this paper formulates a distribution organization optimization model to minimize the total container-hours of inbound China Railway Express at Alataw Pass railway station. Subsequently, a solution method based on the main idea of a genetic algorithm is developed to solve the problem, and two examples of different modes of transportation organization are given for validating the effectiveness of the model. Finally, we compare the results between two modes under different orders of magnitude according to the characteristics of sustainability to discuss the possible change and development of the China Railway Express in the future.

The U.S. Airline Industry in 1995

2017 ◽  
pp. 1-38
Author(s):  
James D. Dana ◽  
David A. Schmitt
Keyword(s):  
Airline Industry ◽  
Industry Structure ◽  
Industry Analysis ◽  
Hub And Spoke ◽  
Cost And Benefit ◽  
Basic Industry ◽  
And Performance ◽  
Point To Point ◽  
Domestic Airline ◽  
The U.S

Provides an overview of the domestic airline industry. Offers details on industry structure and performance necessary for basic industry analysis (or five forces analysis). Also emphasizes cost and benefit drivers, especially hub-and-spoke vs. point-to-point service and sources of differentiation.

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