Economic route selection under the integrated operation mode: case study of China railway express in Zhengzhou

2021 ◽  
Vol 13 (3/4) ◽  
pp. 360
Author(s):  
Liming Sun ◽  
Xuefeng Wang ◽  
Jiawei Ge ◽  
Yangyang Gu
Keyword(s):  
Operation Mode ◽  
Route Selection ◽  
Integrated Operation ◽  
China Railway

Advances in Deepwater Pipeline Route Selection - A Gulf of Mexico Case Study

2004 ◽  
Author(s):  
N.P. Tootill ◽  
M.P. Vandenbossche ◽  
M.L. Morrison
Keyword(s):  
Gulf Of Mexico ◽  
Route Selection ◽  
Pipeline Route

scholarly journals Over-supply in Public Transportation: Case Study of Bus and Metro Lines in Harbin City, China

2016 ◽  
Vol 28 (5) ◽  
pp. 471-477
Author(s):  
Shumin Feng ◽  
Xianghao Shen ◽  
Baoyu Hu
Keyword(s):  
Game Theory ◽  
Nash Equilibrium ◽  
Public Transportation ◽  
Operation Mode ◽  
Utility Model ◽  
Coordinated Development ◽  
Supply Problem ◽  
Harbin City ◽  
Fundamental Reason

As the two most important modes in public transportation, the coordinated development of bus and metro networks significantly influences the efficiency of public transportation. However, two parallel bus and metro lines belonging to different operators may lead to supply competition and consequently yield over-supply. Taking two parallel bus and metro lines in Harbin city, China as a case study, this paper, drawing on game theory, establishes a utility model based on the two lines’ frequencies, and reveals and explains the fundamental reason for the over-supply problem using a Nash equilibrium. In an attempt to resolve this issue, the study proposes a new operation mode: integrating frequencies of the two modes to obtain larger total profits then reallocating the total profits to the two modes. The case study shows that this new operation mode can effectively solve the over-supply problem while satisfying both operators of the two modes, and hence having practical value.

scholarly journals The Steps from Batchwise to Continuous Crystallization for a Fine Chemical: A Case Study

Crystals ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 542 ◽  
Author(s):  
Christian Melches ◽  
Hermann Plate ◽  
Jürgen Schürhoff ◽  
Robert Buchfink
Keyword(s):  
Crystal Size ◽  
Operation Mode ◽  
Continuous Operation ◽  
Industrial Plant ◽  
Fine Chemical ◽  
Industrial Implementation ◽  
Stepwise Development ◽  
Initial Idea ◽  
Definition Of

Many processes to produce fine chemicals and precursors of pharmaceuticals are still operated in batchwise mode. However, recently, more producers have taken a change to continuous operation mode into consideration, performing studies and trials on such a change, while some have even already exchanged their production mode from batchwise to continuous operation. In this paper, the stepwise development from an initial idea to industrial implementation via laboratory testing and confirmation is revealed through the example of an organic fine chemical from the perspective of a crystallization plant manufacturer. We begin with the definition of the objectives of the project and a brief explanation of the advantages of continuous operation and the associated product properties. The results of the laboratory tests, confirming the assumptions made upfront, are reported and discussed. Finally, the implementation of an industrial plant using a draft tube baffled (DTB) crystallizer and the final product properties are shown. Product properties such as crystal size distribution, crystal shape, related storage stability and flowability have successfully been improved.

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.

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