scholarly journals A SYSTEM DYNAMICS MODEL FOR URBAN TAXI PRICE SIMULATION

Transport ◽  
2021 ◽  
Vol 36 (5) ◽  
pp. 395-405
Author(s):  
Shi An ◽  
Xiaowei Hu ◽  
Jian Wang ◽  
Hang Lv
Keyword(s):  
System Dynamics ◽  
Transport System ◽  
Passenger Transport ◽  
Dynamics Model ◽  
System Operation ◽  
Taxi Drivers ◽  
Harbin City ◽  
Flow Diagrams ◽  
The Relationship ◽  
Sd Model

Urban taxi services have been developing year on year, playing an increasingly important role in the economy and the transportation markets of each city. This increases interest in measuring their performance. This paper analysed the relationship among the four stakeholders (including administrative department, operational companies, taxi drivers and customers) for urban taxi passenger transport system in China, and applied System Dynamics (SD) model to explore the dynamic characteristics of urban taxi price system. The main achievements of this paper are as follows, firstly, this paper adopted stakeholder mapping to describe the relationships among the four stakeholders. Then analysed the causal flow diagrams and the different variables of urban taxi passenger transport system operation, and presented the SD model, which considers factors that affect the taxi operation. With the combination of taxi operation data of Harbin city, we simulated eleven urban taxi operation scenarios and proposed kinds of suggestions to improve urban taxi passenger transport system operation, which can provide a good basis for recommending policy decisions for urban taxi market.

Research on the Simulation and Realization Approach of Urban Low-Carbon Transport

2014 ◽  
Vol 989-994 ◽  
pp. 1328-1332
Author(s):  
Xiu Li Gao ◽  
Tian Jun Hu ◽  
Peng Peng
Keyword(s):  
System Dynamics ◽  
Transport System ◽  
Low Carbon ◽  
System Dynamics Model ◽  
Dynamics Model ◽  
Development Trends ◽  
Policy Simulations ◽  
Simulation Results ◽  
The Relationship ◽  
Carbon Transport

This paper discusses the connotation of urban low-carbon transport in detail, on the basis of the analysis of low-carbon transport. Combined with the relationship among urban low-carbon transport system elements, the article establishes the system dynamics model. Finally, it simulates the development trends of low-carbon transport in Beijing in the future, and compares the simulation results of different traffic schemes. Moreover, the study puts forward the concrete policy simulations to improve urban low-carbon transport.

scholarly journals A System Dynamics Model of Employees’ Performance

2020 ◽  
Vol 12 (16) ◽  
pp. 6511
Author(s):  
Mudhafar Alefari ◽  
Mohammed Almanei ◽  
Konstantinos Salonitis
Keyword(s):  
Literature Review ◽  
System Dynamics ◽  
Employee Performance ◽  
System Dynamics Model ◽  
Dynamics Model ◽  
Number Of Factors ◽  
Overall Performance ◽  
Flow Diagrams ◽  
Dynamics Models ◽  
The Impact

Employee performance is dynamic and can have great impact on the overall performance of any company and its sustainability. A number of factors that can be controlled by the company can affect the employees’ performance. The present paper starts with a thorough literature review for identifying these key driving in order to develop a system dynamics models that will be able to assess different improvement scenarios and initiatives. Based on causal loop diagrams, stock and flow diagrams are developed and solved using system dynamics theory. The model developed can be used for organizations to assess the impact of different improvement initiatives.

Optimum Design of Local Cam Profile of a Valve Train

2010 ◽  
Vol 224 (11) ◽  
pp. 2487-2492 ◽  
Author(s):  
W J Qin ◽  
J Q He
Keyword(s):  
System Dynamics ◽  
Valve Train ◽  
Dynamic Responses ◽  
Dynamics Simulation ◽  
Body System ◽  
Dynamics Model ◽  
Adams Software ◽  
Cam Profile ◽  
Multi Body ◽  
The Relationship

In this paper, optimization of the local cam profile of a valve train modelled by a parameterized Bezier curve is described. Dynamic responses of the valve train are simulated through its multi-body system dynamics model built using ADAMS software. The kriging method is used to build the surrogate model, which presents the relationship between dynamic responses resulting from the multi-body system dynamics simulation and the parameters of the local Bezier profile. The local cam profile is optimized through a generic algorithm, such that the acceleration peak at the valve open phase is reduced significantly.

scholarly journals System Dynamics Modeling for Sustainable Water

2020 ◽  
Vol 8 (6) ◽  
pp. 2248-2252
Keyword(s):  
System Dynamics ◽  
Optimal Solution ◽  
Clean Water ◽  
Ratio Model ◽  
System Dynamics Modeling ◽  
System Dynamics Model ◽  
Dynamics Modeling ◽  
Dynamics Model ◽  
The People ◽  
The Relationship

1945 Constitution Article 33 paragraph (3) states that the utilization of water resources must be aimed to the greatest extent possible for the prosperity of the people. The balance between the need for clean water and the availability of clean water needs to be managed in such a way that its utilization meets the criteria for environmental and sustainable integration. The purpose of writing this paper is to provide an overview, how to make a model about the relationship between the availability of clean water and the need for clean water at this time and anticipation going forward, so that the scarcity of clean water can be controlled and anticipated beforehand. The method used is system dynamics with the development of fixed that fail. The result obtained is that a system dynamics model can be used to show the behavior of the clean water ratio model with an alternative optimal solution for changing the positive loop into a negative loop, and can be simulated to obtain a picture or condition of clean water availability in the future.

The Construction Agency's Reasonable Profit Research Based on System Dynamics

2013 ◽  
Vol 357-360 ◽  
pp. 2478-2482
Author(s):  
Yan Wang ◽  
Liang Wang
Keyword(s):  
System Dynamics ◽  
Project Success ◽  
System Dynamics Model ◽  
Dynamics Model ◽  
Government Investment ◽  
Profit Margins ◽  
Cost Rate ◽  
The Difference ◽  
The Government ◽  
The Relationship

The government investment in the construction project general always use of the design budgetary estimate as the construction-agent charge fees foundation, and with reference to the owners management cost rate to calculate the construction-agent charge. By analyzing the composition of the construction-agent charge and the difference between the owners management cost and the construction-agent charge, studying of the composition and rates of construction-agent charge in various key cities nationwide in detail, pointing out the fact that the current generation of construction-agent charge rates are too low, and then established a system dynamics model and analyzed the relationship between a reasonable profit margins and project success rate dynamically. Pointed out the necessity of a reasonable profit margin, and make same recommendations accordingly.

System Dynamics for Modelling Subway Passenger Flow in the Transportation Sector

2021 ◽  
pp. 147-157
Author(s):  
Arzu Eren Şenaras ◽  
Onur Mesut Şenaras
Keyword(s):  
System Dynamics ◽  
Decision Makers ◽  
System Dynamics Model ◽  
Dynamics Model ◽  
Passenger Flow ◽  
Transportation Sector ◽  
Package Program ◽  
Passenger Flows ◽  
Sd Model

Thank to developed SD model, decision makers can create appropriate policy. The importance of passenger numbers in compartments increased due to COVID-19, and managers didn't want to increase passengers in compartments too much. In this study, a model will be developed in Vensim package program. The model will be developed for analyzing passenger flows. Different scenarios can be tested thanks to developed system dynamics model. Subway passenger flow was analyzed via system dynamics. The SD model was developed in Vensim PLE package program. Passenger flow was defined as rate, and stations are defined as stock. Managers would change timing according to time, and effects of these changes can be observed via the model.

scholarly journals Preventive security measures for the public passenger transport system operation based on logistic management principles

2021 ◽  
Vol 334 ◽  
pp. 01002
Author(s):  
Tatiana Shulzhenko
Keyword(s):  
Transport System ◽  
The Body ◽  
Passenger Transport ◽  
Security Measures ◽  
System Operation ◽  
The Public ◽  
Logistic Management ◽  
Line Spacing ◽  
Left And Right

You should leave 8 mm of space above the abstract and 10 mm after the abstract. The heading Abstract should be typed in bold 9-point Arial. The body of the abstract should be typed in normal 9-point Times in a single paragraph, immediately following the heading. The text should be set to 1 line spacing. The abstract should be centred across the page, indented 17 mm from the left and right page margins and justified. It should not normally exceed 200 words.

scholarly journals An assessment of the underlying relationship between land transportation and climate change: Case study Mauritius

2021 ◽  
Author(s):  
Reshma Sunkur ◽  
Kushal Naiko ◽  
Ajay Agundhooa ◽  
Rischay Jhugroo ◽  
Chandradeo Bokhoree
Keyword(s):  
Climate Change ◽  
Carbon Dioxide ◽  
Climate Change Impacts ◽  
Dynamics Model ◽  
Transportation Fuels ◽  
Transportation Sector ◽  
Flow Diagrams ◽  
Mauritius Island ◽  
The Relationship

Introduction: Land transportation encompasses the movement of people and goods and is therefore a major contributor of global greenhouses gases. The main share of such emissions is mostly from the release of carbon dioxide into the air as a result of burning transportation fuels obtained from petroleum, a major driver of climate change. While today the defining issue is a changing climate, the number of vehicles on roads keep on rising around the world. Materials and methods: This study assessed the relationship between land transportation and climate change using a system dynamics model based on a 3-layered taxonomy using Mauritius Island as case study. Over 100 papers were analyzed and the variables that link land transportation and climate change in the Mauritian context were selected and a taxonomy divided into sub-units was built. Results: This innovative taxonomy was divided into 3 sections related to the land transportation sector including a vehicle layer, transport system layer and society layer. Using these variables, three stock and flow diagrams were constructed on Vensim, namely climate change impacts, transport related carbon dioxide and socio-economic models. Conclusion: While there is a complex relationship between land transportation and climate change globally, Mauritius must find ways to become more climate friendly in the land transportation sector.

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