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.
Results
Showing 1 to 20 of 42 for “"Vehicle types"”.
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Use of smartphones to measure pavement roughness across multiple vehicle types at different speeds
… (IRI) and is collected via a data collection vehicle (DCV) using a combination of lasers, accelerometers, and a distance measuring device. Unfortunately, this practice is cost-prohibitive to conduct on an annual basis. However, recent studies have examined the use of low-cost equipment, such …
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Future vehicle types and characteristics : reducing fuel consumption through shifts in vehicle segments and operating characteristics
Light duty vehicles represent a notable target of regulation in the United States due to their environmental, safety, and economic externalities. Fuel economy regulation represents one of the more prominent attempts to limit the environmental externalities of passenger vehicles entering the U.S. …
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Road vehicle recognition and classification using magnetic field measurement
This dissertation presents a road vehicle detection approach for intelligent transportation systems. This approach uses a roadside-installed, low-cost magnetic sensor and associated data collection system. The system measures magnetic field changes to count, detect, and classify passing vehicles …
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The Use of Probabilistic Risk Functions and Linear Penalty Functions for Hospital Evacuation Planning
… the assignments of the patients to the various vehicle types. Due to the computational effort of the duration minimization, manipulations of the risk functions for the risk minimization approach were searched in this thesis such that the resulting evacuation plans approach the minimal duration …
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A hardware-anywhere-in-the-loop simulator for dynamic real-time analysis of electric propulsion systems
This work introduces a low-level real-time vehicle simulator with hardware-anywhere-in-the-loop (HAIL) capability. Vehicle dynamics are simulated on a high-performance workstation running a real-time operating system. The vehicle’s battery pack is both modeled in simulation and interfaced …
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Establishing design vehicles for the hang-up problem
Current design vehicles do not address the hang-up problem. Two factors affect hang-ups: vehicle geometry and roadway geometry. There is a need to establish design vehicle characteristics for hang-up prone vehicles to reduce hang-ups potential.;Roadway geometry and vehicle characteristics relative …
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The Examination of Factors Associated in Motorcycle Crashes in Work Zones
… through the collection and inspection of three types of data: 1) practices used throughout the country on this topic, 2) crash reports and the construction documents pertaining to these crashes, and 3) a survey of the motorcycling community. The state of the practice was studied over the …
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Mobile multimedia service provisioning with collective terminals in broadband satellite networks. An approach for systematic satellite communication system design for service provisioning to collective mobile terminals including: mobile satellite channel modelling, antenna pointing, hierarchical multi-service dimensioning and aeronautical system dimensioning.
… communication to mobile terminals mounted on vehicles, trains, ships or aircraft. This work provides a consequent and structured approach for provisioning of services to broadband satellite terminals for mobile user groups and addresses: -- a systematic satellite communication system design …
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Transshipment networks for last-mile delivery in congested urban areas
… can select the transshipment locations, vehicle types and operating schedules that best fit specific distribution strategies, and, simultaneously, comply with access restrictions and overcome some of the logistics complexity of dense urban zones. This concept is particularly relevant for …
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Vehicle Dynamics Model for Predicting Maximum and Typical Acceleration Rates for Passenger Vehicles
Effectively modeling the acceleration behavior of vehicles is an important consideration in a variety of transportation engineering applications. The acceleration profiles of vehicles are important in the geometric design of roadways and are used to model vehicle behavior in simulation software …
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An expert-based Bayesian investigation of greenhouse gas emission reduction options for German passenger vehicles until 2030
… gas (GHG) emissions from the 2030 German new vehicle fleet and quantifying the impacts of their main drivers. A first set of expert interviews has been carried out in order to identify technologies which may help to lower car GHG emissions and to quantify their emission reduction potentials. …
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Unique abilities of hopper spacecraft to enable national objectives for solar system exploration
… are then described in comparison to other vehicle types, and these vehicle characteristics are mapped to the exploration goals to show how hoppers can facilitate achievement of policy and science objectives. Specific examples are examined by formulating and analyzing a demonstrative and …
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Heterogenous motorised traffic flow modelling using cellular automata
… to date has, however, been restricted to single vehicle-type traffic. Study of heterogeneous traffic movements for urban single and multi-lane roads has been limited, even for developed countries and motorised traffic mix, (with a broader spectrum of vehicle type applicable for cities in the …
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Probabilistic assessment of the impact of plug-in electric vehicles on power quality in electric vehicles on power quality in electric distribution systems.
… oil. The integration of plug-in electric vehicles into the electric distribution system may pose potential power quality problems due to the uncertainties in the number of these vehicles, their charging time and locations. Several power quality phenomena such as voltage deviations, voltage …
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Driving segments analysis for energy and environmental impacts of worsening traffic
… growing worse. With the worsening traffic, the vehicle's fuel consumption and pollutant emissions will inevitably increase. As such, this thesis aims to quantitatively evaluate the energy and environmental impacts of worsening traffic on individual vehicles and the U.S. light-duty vehicle fleet, …
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Modelling the driver for traffic flow simulation
… to construct his own road networks, driver types, and vehicle types. With these, he can simulate traffic and examine both isolated incidents and overall performance measures.
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Modeling Permissive Left-Turn Gap Acceptance Behavior at Signalized Intersections
… approach. The physical component captures the vehicle constraints on gap acceptance behavior using vehicle dynamics models while the psychological component models the driver deliberation and decision process. In general, the three proposed models capture gap acceptance behavior for different …
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Understanding the challenges in HEV 5-cycle fuel economy calculations based on dynamometer test data
… additional complexities for hybrid electric vehicles, because although they are required to have charge-balanced batteries over the course of a full drive cycle, they may have net charge or discharge within the individual phases. The fundamentals of studying battery charge-balance are …
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Advanced active rectifiers for electric vehicle battery charging
… of fully electric or plug-in hybrid electric vehicles. Both of these vehicle types require an external power source to fully charge their large amount of energy storage. For most consumers this means plugging their vehicle into the utility which necessitates battery charging circuitry. More …
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Development of Regional Optimization and Market Penetration Models For Electric Vehicles in the United States
… fuel technologies, including electric vehicles (EVs). As vehicles become electrified, the transportation fleet will rely on the electric grid as well as traditional transportation fuels for energy. The life cycle cost and environmental impacts of EVs are still very uncertain, but are …
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