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 11 of 11 for “"Emissions modeling"”.
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Real world heavy-duty vehicle emissions modeling
Heavy-duty vehicle emissions represent a significant portion of the mobile source emissions inventory. Accurate estimation of their contribution is essential as on-highway and non-road heavy-duty diesel emissions account for at least one third of the oxides of nitrogen (NOx) in the inventory. West …
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High Automobile Emissions: Modeling Impacts and Developing Solutions
… to institute policies aimed at reducing GHG emissions. These policies and emerging initiatives have significant implications for the transportation planning process. The transportation sector accounts for approximately 27% of GHG production in the U.S. (as of 2003) and while the U.S. accounts …
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Development of aircraft fuel burn modeling techniques with applications to global emissions modeling and assessment of the benefits of reduced vertical separation minimums
… to adequately model and quantify fuel burn and emissions on a system wide scale is of high importance. In particular, the ability to adequately assess the ability of operational alternatives within the commercial aviation system to improve system efficiency and reduce environmental impact is …
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Predicting Long -Term Impacts of Urbanization in the St. Louis Metropolitan Area on Regional Emissions of Air Pollutants From Residential Fuel Combustion: A Dynamic Geographic Information Systems Approach
… bottom-up approach not only extends the existing emissions modeling by including the influences of city, town, suburb, and rural boundary as well as effects of spatial distribution of household income on fuel consumptions but also provides a quick and easy way to connect urbanization with …
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Verification Of FAA's Emissions And Dispersion Modeling System (EDMS)
… for many years. Recently the issue of airport emissions has presented growing concerns and is being studied in much more depth. Airport emissions come from a variety of point, line and area sources, making emissions modeling for airports very complex and more involved. Accurate air quality …
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Do Roundabouts Work? An Evaluation for Uniform Approach Demands
… carbon monoxide, hydrocarbon and nitrogen oxide emissions can be improved with roundabout control over other intersection control strategies. The research presented here demonstrates that for low traffic demand levels roundabouts should be part of design alternatives considered for isolated …
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Atmospheric Impact of Biogenic Volatile Organic Compounds: Improving Measurement and Modeling Capabilities
… aims to advance our understanding of BVOC emissions and their implications through a comprehensive and multi-faceted investigation. We investigate the dynamics of BVOCs in the atmosphere through three key objectives. First, we introduce a novel enriching inlet that uses selective permeation …
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Physics-Based Artificial Intelligence Models for Vehicle Emissions Prediction
… understanding of complex physical phenomena like emissions formation during combustion. In this thesis, a physics-based artificial intelligence framework is developed to predict and analyze trends in engine-out NOx emissions of diesel and diesel-hybrid heavy-duty vehicles. This framework differs …
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Linking biophysical models and life cycle assessment to evaluate environmental tradeoffs of urban water infrastructure design
… US Clean Water Act) and electricity demand (GHG emissions targets) both cover utilities, with the goal of improving their environmental sustainability. These multiple objectives may call for conflicting operational decisions, which presents a direct tradeoff to utility decision makers—increase …
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A new diagnostics tool for water injected gas turbines - emissions monitoring and modeling
… attain both high thermal efficiency and low emissions. The attainment of low emissions from natural gas fired turbines, in particular low NOx emissions, is of considerable environmental importance especially as coal becomes a less favorable fuel source. Our current project addresses emissions …
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Quantifying the Impact of Climate Change on Water Availability and Water Quality in the Chesapeake Bay Watershed
… conservation practices, and greenhouse gas (GHG) emissions. The Chesapeake Bay and its watershed are subject to the largest and most expensive Total Maximum Daily Load (TMDL) ever developed. It is unclear if the TMDL can be met given climate change and variability (e.g., extreme weather events). …