scholarly journals Study on Optimal Loading of Zero Load Cargo

2021 ◽  
Vol 261 ◽  
pp. 03030
Author(s):  
Tingpeng Chen ◽  
Huiwen Fan ◽  
Xingzhen Zhang ◽  
Zhenhui Li ◽  
Shibo Hu
Keyword(s):  
Continuous Improvement ◽  
Urban Network ◽  
Total Cost ◽  
Part Load ◽  
Logistics Network ◽  
Logistics Enterprises ◽  
Logistics Market ◽  
Freight Volume ◽  
Load Transportation ◽  
Distribution Efficiency

In recent years, thanks to the transformation and upgrading of domestic consumption and the continuous improvement of logistics network, the total freight volume of China’s part-load logistics market is also increasing, among which urban logistics network plays an important role in part-load logistics enterprises. Reasonable and perfect urban network is helpful to reduce the total cost of market logistics and improve distribution efficiency. This paper introduces the problems existing in part-load logistics, studies the urban logistics model of part-load logistics enterprises, introduces three ways of part-load transportation, and analyzes the urban logistics model of part-load logistics enterprises. At the end of this paper, the above contents are briefly summarized.

scholarly journals Hub-and-Spoke Logistics Network Considering Pricing and Co-opetition

2021 ◽  
Vol 13 (17) ◽  
pp. 9979
Author(s):  
Jian Zhou ◽  
Kexin Xu ◽  
Yuxiu Zhao ◽  
Haoran Zheng ◽  
Zhengnan Dong
Keyword(s):  
Rapid Development ◽  
Service Needs ◽  
Carbon Credits ◽  
Logistics System ◽  
Hub And Spoke ◽  
Logistics Network ◽  
Joint Construction ◽  
Logistics Enterprises ◽  
Logistics Market ◽  
Remaining Capacity

With the rapid development of the logistics market, the construction of an efficient “channel + hub + network” logistics system, that is, a hub-and-spoke logistics network, is of great importance to enterprises. In particular, how to reduce costs and increase efficiency in both the construction of network facilities and actual operations, and to formulate reasonable prices for the logistics service needs in the entire market are crucial strategies and decisions for enterprises. Under such a background, this article starts from the perspective of duopoly logistics enterprises that jointly build networks and allow the transfer of surplus capacity and carbon credits, and studies the hub-and-spoke logistics network design that also considers the relationship between service pricing and co-opetition. Considering the corporate profit and difficulty of implementation as a whole, the co-opetition is a better choice than the complete competition and perfect cooperation. In addition, the remaining capacity of the company, the transfer of carbon credits, the joint construction and sharing of hubs, and strategic cooperation in the area of corporate common pricing under the price framework agreement are conducive to the realization of an increase in corporate operating profits, a better market share and more favorable pricing.

scholarly journals Model and Algorithm of Two-Stage Distribution Location Routing with Hard Time Window for City Cold-Chain Logistics

2020 ◽  
Vol 10 (7) ◽  
pp. 2564
Author(s):  
Liying Yan ◽  
Manel Grifoll ◽  
Pengjun Zheng
Keyword(s):  
Time Window ◽  
Hybrid Genetic Algorithm ◽  
Distribution Networks ◽  
Cold Chain ◽  
Two Stage ◽  
Logistics Network ◽  
Stage Distribution ◽  
Hard Time ◽  
Location Routing ◽  
Logistics Enterprises

Taking cold-chain logistics as the research background and combining with the overall optimisation of logistics distribution networks, we develop two-stage distribution location-routing model with the minimum total cost as the objective function and varying vehicle capacity in different delivery stages. A hybrid genetic algorithm is designed based on coupling and collaboration of the two-stage routing and transfer stations. The validity and feasibility of the model and algorithm are verified by conducting a randomly generated test. The optimal solutions for different objective functions of two-stage distribution location-routing are compared and analysed. Results turn out that for different distribution objectives, different distribution schemes should be employed. Finally, we compare the two-stage distribution location-routing to single-stage vehicle routing problems. It is found that a two-stage distribution location-routing system is feasible and effective for the cold-chain logistics network, and can decrease distribution cost for cold-chain logistics enterprises.

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.

An Analysis of the Development of Logistics in Guangxi Beibu Gulf Economic Zone

2011 ◽  
Vol 225-226 ◽  
pp. 178-181
Author(s):  
Qian Lan
Keyword(s):  
Service Level ◽  
Growth Potential ◽  
Beibu Gulf ◽  
Management Mechanism ◽  
Primary Stage ◽  
Logistics Enterprises ◽  
Logistics Market ◽  
Economic Zone ◽  
Logistics Demand ◽  
Pillar Industry

Although the logistics of Beibu gulf (Guangxi) is still in the primary stage such as the small-scaled logistics enterprises, low service level, weak logistics demand, sluggish infrastructure, and the chaotic logistics market, etc, it faces a series of development opportunities, its second-mover advantage is obvious and the growth potential is great. As long as we straighten out the management mechanism, overcome the bottleneck of the system, position accurately, analyze rationally, distribute reasonably, build logistics infrastructure according to the situation of the economic zone, pay great attention to the personnel training and learn from others’ experience, logistics can become a pillar industry in Beibu gulf economic zone.

Logistics Infrastructure Network Evaluation Method Research Based on Logistics Resource Integration in Railway Logistics Enterprises

2014 ◽  
Vol 933 ◽  
pp. 941-946
Author(s):  
Xi Chen ◽  
Xiao Ning Zhu
Keyword(s):  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Evaluation Model ◽  
Evaluation Criteria ◽  
Theory And Practice ◽  
Logistics Network ◽  
Proposed Model ◽  
Infrastructure Network ◽  
Logistics Enterprises ◽  
The Relationship

In view of logistics resources integration, this paper introduces an evaluation method of logistics network infrastructure in railway logistics enterprises. The comprehensive evaluation model is established according to the aspects which demonstrate several key indexes and the relationship between them. To illustrate the effectiveness of the above method and the application of the proposed model, a case is studied that verifies the importance of the research in the logistics theory and practice. It presents an evaluation criteria and evaluation model of logistics infrastructure network. The computational results indicate that the evaluation method in selected case is in decent rank.

scholarly journals Costs planning and ways to improve bridge operation service

2021 ◽  
Vol 7 (2) ◽  
pp. 30-41
Author(s):  
Nikita A. Gugа ◽  
Gleb A. Averchenko ◽  
Kirill A. Vasilev ◽  
Vyacheslav A. Borisov ◽  
Alexey M. Ismailov
Keyword(s):  
Continuous Improvement ◽  
Bridge Structure ◽  
Maintenance And Repair ◽  
Total Cost ◽  
Bridge Maintenance ◽  
Bridge Structures ◽  
Under Construction ◽  
The Cost ◽  
Over Time ◽  
Increasing Load

Repair and reconstruction is an integral part of the life cycle of such structures as: bridges, overpasses, aqueducts. Timely maintenance and repair of bridge structures contributes to the continuous improvement of their technical level, as well as to the operational state with increasing load and intensity over time on constantly under construction highways. This article presents the results of a study of the need to repair structures over time. The article contains a description of the types of work, as well as the terms when these works need to be performed, graphs of the volume and cost of work are given. As materials and initial data, the data of approximate turnaround periods of elements of bridge structures were taken, as well as a table of the frequency of repairs by year was compiled. Based on the collected data, graphs of the cost and changes in the volume of work were built over time. In addition, graphs of the cost of repairing individual elements of the structure are given in relation to the total cost of the structure. Based on the results obtained, recommendations are formulated for planning the repair of expatriated bridge structures by bridge maintenance departments. A set of measures is also proposed to eliminate existing violations and further operation of the bridge structure. A set of works for the repair of individual units and structures is recommended. Arguments are given for the need to share responsibilities between bridge operation departments during the repair of the structure.

A Gravitational Search Algorithm Approach for Optimizing Closed-Loop Logistics Network

2012 ◽  
pp. 1768-1789
Author(s):  
Abdolhossein Sadrnia ◽  
Hossein Nezamabadi-Pour ◽  
Mehrdad Nikbakht ◽  
Napsiah Ismail
Keyword(s):  
Supply Chain ◽  
Closed Loop ◽  
Search Algorithm ◽  
Gravitational Search Algorithm ◽  
Optimization Methods ◽  
Total Cost ◽  
Logistics Network ◽  
Network Problems ◽  
Gravitational Search ◽  
Law Of Gravity

Since late in the 20th century, various heuristic and metaheuristic optimization methods have been developed to obtain superior results and optimize models more efficiently. Some have been inspired by natural events and swarm behaviors. In this chapter, the authors illustrate empirical applications of the gravitational search algorithm (GSA) as a new optimization algorithm based on the law of gravity and mass interactions to optimize closed-loop logistics network. To achieve these aims, the need for a green supply chain will be discussed, and the related drivers and pressures motivate us to develop a mathematical model to optimize total cost in a closed-loop logistic for gathering automobile alternators at the end of their life cycle. Finally, optimizing total costs in a logistic network is solved using GSA in MATLAB software. To express GSA capabilities, a genetic algorithm (GA), as a common and standard metaheuristic algorithm, is compared. The obtained results confirm GSA’s performance and its ability to solve complicated network problems in closed-loop supply chain and logistics.

The Optimization of Logistics and Distribution

2014 ◽  
Vol 989-994 ◽  
pp. 1532-1535
Author(s):  
Wei Xiong ◽  
Ling Yu Zhang
Keyword(s):  
Distribution System ◽  
Distribution Network ◽  
Service Levels ◽  
Total Cost ◽  
Retail Business ◽  
Mode Of Operation ◽  
Survival And Development ◽  
Logistics Enterprises ◽  
Enterprise Logistics ◽  
Efficient Distribution

Distribution is an important function of enterprise logistics. Through efficient distribution activities, it can reduce the total cost of logistics enterprises and improve logistics efficiency and service levels. Therefore, the rationality of the logistics and distribution system design will directly affect the survival and development of enterprises. In this dissertation uses a retail business distribution network for the study, to study its distribution optimization models and methods, using a variety of algorithms for analysis, to understand its distribution network efficient mode of operation.

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