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 17 of 17 for “"Delay Models"”.
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Delay models for intersections controlled by stop signs
This study divided the total delay into service and queue delay, and developed separate models for each component. Using a single model to estimate total delay is not appropriate, because the factors that affect the service delay are different from the factors that affect the queue delay.
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Wire delay models for global placement of ASICs
A new model for the propagation delay between two logic gates for timing-driven global placement is proposed. The model is a function of the number of pins on the net, the half perimeter of the bounding box enclosing the net, and the half perimeter of the bounding box enclosing the driving pin and …
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Development of Arrival-Type-Based Uniform Delay Models for Signalized Intersections
The resulting models: (1) Consider platoon duration, flow rate and/or number of vehicles in platoon, (2) Are sensitive to traffic volume inside platoon, and (3) because a distinct delay model was deduced for each arrival type, the need for applying delay adjustment factors was eliminated. …
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Development of Arrival Time Based Uniform Delay Models for Oversaturated Signalized Intersections
Comparisons of control delays show that HCM estimates were not significantly different from the simulated filed data generated by CORSIM for 12 scenarios out of 28 for zero initial queue conditions, and 14 scenarios out of 28 for nonzero initial queue conditions, however for the remaining scenarios …
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STOCHASTIC MODELS IN POPULATION DYNAMICS.
… discusses the construction of some stochastic models for population dynamics with a variety of birth and death rate functions. A general model is constructed considering a fundamental growth rate function of the population while allowing random births and deaths in the population. Four …
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Influence of various troposphere modelling and estimation techniques on precise position estimation of permanent GPS arrays
… data (down to 5°), various a priori tropospheric delay models, mapping functions as well as the influence of tropospheric gradient parameters estimation on station position, precision and accuracy, in order to ascertain the optimal combination to use in routine processing of TrigNet station.
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Optimization of high-speed CMOS circuits with analytical models for signal delay
… in deep submicron regime with respect to signal delay, chip area and power dissipation. Accurate modeling of signal path delays is of particular importance in optimization. Although circuit level simulators like SPICE produce accurate and detailed delay information, analytical delay models are …
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Atmospheric signal delay affecting GPS measurements made by space vehicles during launch, orbit and reentry
… present neutral atmosphere, ionosphere and total delays experienced by GPS signals traveling to space vehicles during launch, orbit and reentry. I calculate these delays for receivers at 0 km to 1700 km altitude by ray-tracing through the Global Reference Atmosphere Model (1999) and the …
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Accurate power analysis of integrated CMOS circuits on gate level
… the logic simulation, which use conventional delay models, is not accurate enough for circuits with a significant logical circuit depth. The exact modelling of glitches on gate level is the main contribution of the thesis. First the different operation points of a gate are analysed for a …
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Microscopic Control Delay Modeling at Signalized Arterials Using Bluetooth Technology
Real-time control delay estimation is an important performance measure for any intersection to improve the signal timing plans dynamically in real-time and hence improve the overall system performance. Control delay estimates helps to determine the level-of-service (LOS) characteristics of various …
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On low power floating point data path architectures
… the design methodology, high level power/delay models that reflect the architecture of the functional units are developed. The behavior of the architectures is validated through simulations. Instrumented digital filter programs that emulate the multiply-accumulate segment of DSP systems …
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Design of aircraft noise abatement approach procedures for near-term implementation
… human factors experiment to obtain models of pilot delay in extending flaps/gear in conditions with and without turbulence; 2) formulating the procedure's parameters as strategic and tactical control variables; 3) using the pilot delay models and the parameter formulation to perform …
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A strategic investment decision model for line-haul operations on a developing country railway
… accuracy from a simple data input. The train delay model reflects the types of delays found using both low and high, technology trains working methods. The accuracy of both the speed and delay models was tested by running them separately from the rest of the model, using data from Botswana. …
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Low-Power-Driven Synthesis Algorithms for Sequential and Combinational Circuits
… strict timing constraint derived from industrial delay models. We introduced a novel concept of a delay-cost curve to store only important design trade-offs on the delay versus cost spectrum at each node of the circuit. We prove that our approach requires exponentially lesser storage compared to …
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Analysis of atmospheric delays and asymmetric positioning errors in the global positioning system
Abstract Errors in modeling atmospheric delays are one of the limiting factors in the accuracy of GPS position determination. In regions with uneven topography, atmospheric delay phenomena can be especially complicated. Current delay models used in analyzing GPS data from the Plate Boundary …
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Dynamic routing on stochastic time-dependent networks using real-time information
… of freight vehicles. Both the travel time delay and its variability impact the efficiency of JIT logistics operations, that are becoming more and more common in many industries, and in particular, the automotive industry. In this dissertation, we first propose a framework for dynamic …
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Delay, Stop and Queue Estimation for Uniform and Random Traffic Arrivals at Fixed-Time Signalized Intersections
… provide simple approaches for estimating delay, queue length and stops at signalized intersections, they are limited in scope. Alternatively, several microscopic simulation softwares are currently available for the evaluation of signalized intersections. The objective of this dissertation …