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 34 for “"Traffic Density"”.
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Large-Scale Unmanned Aerial Systems Traffic Density Prediction and Management
… in the near future, the complicated and high density UAS traffic will impose significant burden to air traffic management. Lot of works focus on the application development of individual Small Unmanned Aerial Systems (sUAS) or sUAS management Policy, however, the study of the UAS cluster …
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Lead, cadmium, nickel and zinc concentrations in soil and vegetation associated with highways of different traffic densities
… was collected along four highways of different traffic volumes, at varying distances from the road, and at two control areas. Four sampling periods were conducted throughout the course of a year from August, 1976 to June, 1977. Soil and vegetation samples were tested for concentrations of lead, …
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Identifying the optimal highway driving conditions for the integration of manned and autonomous vehicles
… vehicles on the roadways. Two cost functions, traffic flow rate and safety, based on the number of collisions, were optimized with respect to two parameters, fraction of autonomous vehicles and traffic density. From the plotted data, the critical points could be identified. The results suggest …
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A study of three classes of sequencing rules in a simulated job shop
… used. The results indicated that at low traffic density there was no appreciable difference among the measures of performance for the three sequencing rules. At high traffic density SPT had the lowest inventory level but its mean lateness was larger than That of FCFS even Though its …
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Air pollution and health: distribution and determinants of exposure in Montreal, Quebec with a focus on polycyclic aromatic hydrocarbon assessment
… socio-demographic factors and residential traffic exposure; and, 3) to assess correlations between two PAH biomarkers and their relationship with a newer geographic information system (GIS) method (a proxy of PAH exposure measurement), and explore determinants of these two PAH biomarkers. …
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Engineering and policy analysis of strategic and tactical options for future aerospace traffic management
… Special Use Airspace (SUA), separate from air traffic. This is a strategic traffic management policy because SUA size and duration are set well in advance. It forces space operations to disrupt aviation, which could become costly with growth in air or space transportation. This was investigated …
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A national method for predicting environmental pollution
… considered include: <br></br><br></br>- traffic density <br></br><br></br>- road network density and <br></br><br></br>- land use <br></br><br></br>for predicting noise and <br></br><br></br>- land use and, <br></br><br></br>- whether an area is subject to smoke control …
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Analisis kandungan timbal (Pb) pada talus lichenes di Kabupaten Lamongan
… purposively selected based on the level of traffic density and direction of the wind, which is on the highway Deket and the highwayBabat (high traffic density), highway Pantura and highway Mantup (medium traffic density), and highways Sumberwudi (low traffic density). Lichenes taken at each …
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Real-Time Estimation of Traffic Stream Density using Connected Vehicle Data
The macroscopic measure of traffic stream density is crucial in advanced traffic management systems. However, measuring the traffic stream density in the field is difficult since it is a spatial measurement. In this dissertation, several estimation approaches are developed to estimate the traffic …
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Development of a Car -Following Model to Simulate Driver and Autonomous Intelligent Cruise Controlled Vehicular Traffic Flow
INTELSIM model was also utilized to study traffic flow characteristics of a mix of driver controlled (DC) and AICC vehicles as well as all AICC vehicles. INTELSIM algorithm provided stability in AICC platoons and performed well in a variety of traffic situations including stop-and-go conditions. …
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Solving transport-density equation with diffusion using the first integral method and the generalized hyperbolic functions method
… of nonlinear partial differential transport-density equation with diffusion traffic flow model. Basically, the first integral method (FIM) and the generalized hyperbolic functions method (GHFM) are employed to solve the proposed model and to give compelling evidence that regularization of the …
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A planned approach to high collision risk area
… collisions are rare, to a high risk and heavy traffic area such as a Traffic Separation Scheme (TSS). Previous autonomy approaches generally view path planning and collision avoidance as two separate functions, i.e. a vessel will follow the planned path until conditions are met for collision …
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A distributed local Kalman consensus filter for traffic estimation: design, analysis and validation
… filter (DLKCF) for large-scale multi-agent traffic density estimation. The switching mode model (SMM) describes the traffic dynamics on a stretch of roadway, and the model dynamics are linear within each mode. The error dynamics of the proposed DLKCF is shown to be globally asymptotically …
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A planned approach to high collision risk area
… collisions are rare, to a high risk and heavy traffic area such as a Traffic Separation Scheme (TSS). Previous autonomy approaches generally view path planning and collision avoidance as two separate functions, i.e. a vessel will follow the planned path until conditions are met for collision …
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Klimawirkung von Kondensstreifen: Untersuchungen mit einem globalen atmosphärischen Zirkulationsmodell
… and size. Considering future changes in air traffic density, and aircraft technology, as well as anthropogenic climate change, an increase of global contrail cover and radiative forcing by roughly a factor of four between 1992 and 2050 is simulated.
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Studies of Atmospheric Pollution due to Lead in the Vicinity of Urban Motorways
… Hill district of Birmingham increased the traffic density of that area. The effect of the opening and use of the interchange on atmospheric lead concentrations was studied. An equation to predict the pollution level at a reference site from two weather variables, wind speed and temperature, …
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Dynamic Control Structures for Cooperating Processes (Elections, Deadlock Detection, Decentralized, Agreement)
… to be maintained. Moreover, as processor load, traffic density, or other system parameters vary, the control structure should be reassessed, and if necessary a new one adopted. The procedure of selecting a control structure involves a series of elections in which different subsets of processes …
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Capacity and Throughput Optimization in Multi-cell 3G WCDMA Networks
User modeling enables in the computation of the traffic density in a cellular network, which can be used to optimize the placement of base stations and radio network controllers as well as to analyze the performance of resource management algorithms towards meeting the final goal: the calculation …
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Safety considerations for operation of different classes of unmanned aerial vehicles in the National Airspace System
… and autonomous capability and the source of traffic surveillance in the system. A system safety analysis was performed according to FAA system safety guidelines for two critical hazards in UAV operation: midair collision and ground impact. Event-based models were developed describing the …
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Information collection algorithm for vehicular ad-hoc networks (application domain: Urban Traffic Wireless Vehicular Ad-Hoc Networks (VANETs))
… modern approaches for exchanging and generating traffic information with (yet to be realized) potential to improve road safety, driving comfort and traffic control. In this research, we present a novel algorithm which is based on V2V communication, uses in-vehicle sensor information and in …
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