Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 43 for “"traffic model"”.
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Lane Preference in a Simple Traffic Model
… lanes with a given probability, <I>p</I>. The model can be interpreted as traffic flow on a two-lane beltway, with fast cars preferring the left lane and slow cars preferring the right, viewed in a comoving frame. In steady-sate, the system typically exhibits a macroscopic cluster containing a …
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A traffic model with service rate quadratic in occupancy.
Thesis: M.S., Massachusetts Institute of Technology, School of Industrial Management, 1965
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An experimental analysis of two-fluid traffic model parameter sensitivity
The Two-Fluid traffic model is a tool used to measure the quality of service in city traffic networks. The model has been calibrated for the central business district of Roanoke, Virginia and the results have been compared to those from various other cities around the world. In addition, the …
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Performance analysis of multiprocessor interconnection networks using a burst-traffic model
… the benchmarks studied on that system, a burst-traffic model is developed. The performance predictions of the model for adaptive and oblivious virtual-channel routers used in a 2D torus are compared to those of an open-loop random-traffic model, and significant differences are shown to exist.
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Estimating post-disaster traffic conditions using real-time data streams
… determine the effects of an earthquake on road traffic conditions by linking seismic hazard and bridge fragility models with a traffic model and traffic sensor data. Using the earthquake characteristics as an input to the traffic model, the traffic conditions are sequentially estimated given …
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WAVELET-BASED NETWORK TRAFFIC MODELING
… growth. This phenomenal growth in terms of traffic volume, bandwidth requirements, network topologies and protocols, medium of communication, and network applications, is constantly changing the nature of network traffic, thus motivating the need for flexible and efficient mathematical …
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Scheduling Non-Uniform Traffic in a Packet Switching System
Flexible non-uniform traffic models are important for the analysis of integrated data networks carrying diverse classes of data. In this thesis, a new model of non-uniform traffic is introduced for a single-hop packet switching system. This traffic model allows arbitrary traffic streams subject …
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Feedback Control Theory in Stochastic Dynamical Systems
… of statistical tools and methods. For classical model, I perform a study on finite-size effects at the phase transition in the Nagel-Schreckenberg traffic model as an example of non-equilibrium many body stochastic dynamical system. For quantum mechanical model, I introduce an optimal …
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Computationally efficient simulation-based optimization algorithms for large-scale urban transportation problems
… optimization algorithms that derive effective traffic management strategies to reduce congestion and improve the efficiency of urban transportation systems. The proposed algorithms enable the use of high-resolution yet computationally inefficient urban traffic simulators to address large-scale …
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Exploration and Exploitation Techniques for High-Dimensional Simulation-Based Optimization Problems in Urban Transportation
Stochastic traffic and mobility simulation models are popular tools for modeling urban transportation networks. However, their use for optimizing urban transportation networks can be challenging due to their computationally intensive nature. This thesis focuses on high-dimensional simulation-based …
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Continuum modeling of the deceleration transient state in stochastic traffic flow
Due to individual driver behavior, a traffic system is subject to many stochastic factors. Deterministic partial differential equations and their extensions, traditionally used in traffic flow modeling, may not be sufficient in applications such as real-time estimation and prediction of traffic …
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Macroscopic Coupling Conditions with Partial Blocking for Highway Ramps
We consider the Lighthill-Whitman-Richards traffic model on a network consisting of a highway with an off ramp, connected by a junction. We compare the known coupling conditions for the evolution of traffic at the junction and suggest a novel improvement to the existing conditions. That is, we …
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Generalised proportional-integral-plus control
… described by discrete time transfer function models in the backward shift operator. This yields Proportional-Integral-Plus (PIP) controllers that are particularly easy to implement in practice, since the state variables are defined only in terms of the sampled input and output signals. The …
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Short-term traffic forecasting for a smart satellite communications system
… resources is the change in user terminal traffic during a complete cycle of the system: collecting data, generating a constellation setting solution, transmitting the new solution to each satellite and executing changes to the satellite's parameters. As the system's cycle time grows the …
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Hybrid flow data center network architecture design and analysis
… data center. We present a simplified data center traffic model, where data center traffic is categorized into mice traffic and elephant flows. The electronic packet switched architecture allows for low overhead and complexity for small transactions. However, mice traffic suffers as the size, …
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Improving performance through topology management and wireless scheduling in military multi-hop radio networks
… of differing levels of complexity, and model performance using each. A comparison of the results of each method is given. In the second problem, we study a ground multi-hop wireless network. Scalability is an issue for such ground tactical radio networks, as increasing numbers of nodes …
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Assessing the role of human behaviors in the management of extreme hydrological events: an agent-based modeling approach
… hydrological events. Using an agent-based modeling (ABM) approach, three specific issues associated with modeling human behaviors are addressed: (1) behavioral heterogeneity, (2) social interaction, and (3) the interplay of multiple behaviors. The modeling approach is applied to two types …
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A Macroscopic Model for Evaluating the Impact of Emergency Vehicle Signla Preemption on Traffic
… done using field studies. None of the simulation models that are currently commercially available have the capability to model the presence of EVs and simulate the traffic dynamics of the vehicles surrounding them. This study presents a macroscopic traffic model for examining the effect of signal …
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Space-time modelling of exposure to air pollution using GIS
… tests and applies methods for space-time modelling of exposure to air pollution using GIS. This involves linkage of five main sub-models: a traffic model, a model of urban air pollution - combining local and ‘background’ pollution models - a network analysis tool for modelling exposure …
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Resource management for dynamic optical networks
… and support unprecedented flexibility for high-traffic resource sharing. However, managing dynamic networks poses challenging problems related to scale and traffic volume. Traditional analytical techniques, which rely heavily on simplification of network topologies and route choices, are …
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