Sökning: "Joakim Ekström"
Visar resultat 1 - 5 av 7 avhandlingar innehållade orden Joakim Ekström.
1. Contributions to the Theory of Measures of Association for Ordinal Variables
Sammanfattning : In this thesis, we consider measures of association for ordinal variables from a theoretical perspective. In particular, we study the phi-coefficient, the tetrachoric correlation coefficient and the polychoric correlation coefficient. LÄS MER
2. Designing Urban Road Congestion Charging Systems : Models and Heuristic Solution Approaches
Sammanfattning : The question of how to design a congestion pricing scheme is difficult to answer and involves a number of complex decisions. This thesis is devoted to the quantitative parts of designing a congestion pricing scheme with link tolls in an urban car traffic network. LÄS MER
3. Optimization Approaches for Design of Congestion Pricing Schemes
Sammanfattning : In recent years, there has been a growing interest in congestion pricing as a tool for solving traffic congestion problems in urban areas. However, the transportation system is complex and to design a congestion pricing scheme, i.e. to decide where and how much to charge the road users, is not trivial. LÄS MER
4. On the use of traffic flows for improved transportation systems : Mathematical modeling and applications
Sammanfattning : This thesis concerns the mathematical modeling of transportation systems for improved decision support and analysis of transportation-related problems. The main purpose of this thesis is to develop and evaluate models and methods that exploit link flows. LÄS MER
5. Data-Driven Approaches for Traffic State and Emission Estimation
Sammanfattning : Traffic congestion is one of the most severe problems in modern urban areas. Besides the amplified travel times, traffic congestion intensifies the amount of emitted pollutants impacting human health and the environment. LÄS MER