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 46 for “"speed profile"”.
-
A tomographic ocean sound speed profile from a long veritcal acoustic array
An average sound speed profile over a 1000 km section of the northeast Pacific ocean is obtained using Ocean Acoustic Tomography, from data acquired during the 1987 SVLA experiment on a long (900 m) 120 hydrophone vertical acoustic array. In particular, we pulse compress the received signal with a …
-
Investigation on the effects of the wind vertical angle of attack and the wind speed profile on low-rise building pressures and its implications for wind loading by severe convective storms
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-14 without embargo terms
-
A matched field processing approach to long range acoustic navigation
… an inversion for both vehicle position and sound speed profile parameters. Tracking changes in the sound speed profile allows the vehicle to maintain navigation accuracy in a time-varying acoustic environment. Simulation results for typical Arctic conditions indicate the potential for accurate …
-
A modal/WKB inversion method for determining sound speed profiles in the ocean and ocean bottom
Two approaches to determining the ocean sound speed profile using measured acoustic modal eigenvalues are examined. Both methods use measured eigenvalues and mode dependent assumed values of the WKB phase integral as input data and use the WKB phase integral as a starting point for relating the …
-
A modal analysis of acoustic propagation in the changing Arctic environment
… acoustic propagation through double duct sound speed profiles in the Arctic. While the traditional Arctic sound speed profile has a single surface duct, some portions of the Arctic have a sound speed profile which includes a second, lower duct. These double duct systems are seen through out the …
-
Fuel minimization of a moving vehicle in suburban traffic
… traffic light information in order to adapt his speed profile to save fuel. The mission is given by a final destination to reach (through a set of traffic lights) within a specific deadline and the objective is to minimize the fuel consumption. We assume that the speed between each traffic light …
-
Distributed Method to Optimal Profile Descent
Current ground automation tools for Optimal Profile Descent (OPD) procedures utilize path stretching and speed profile change to maintain proper merging and spacing requirements at high traffic terminal area. However, low predictability of aircraft's vertical profile and path deviation during …
-
FRACTIONAL-SLOT CONCENTRATED-WINDING SURFACE-MOUNTED PERMANENT MAGNET MOTOR DESIGN AND ANALYSIS FOR IN-WHEEL APPLICATION
… tasks have to be completed: calculating torque-speed characteristic, calculating losses, studying on motor control strategy. For in-wheel application, surface-mounted permanent magnet motor with fractional-slot concentrated-windings is adopted. Its torque-speed profile of flux-weakening control …
-
Theoretical and numerical studies of wave propagation and scattering in inhomogeneous media
… medium with the linear refractive index profile is obtained. The technique is extended to treat the three-dimensional and range-dependent media with or without turning points. Two analytical expressions of the Green's functions are also obtained for such media. For a line source in the …
-
A numerical method for solving for normal modes with impedance bottom
… the depth of source and receiver, the sound speed profile of the water, the frequency of the source, and the impedance and sound speed in the bottom. The program does this by computing the sum of normal modes for a specified set of boundary conditions. At the surface perfect pressure release …
-
Field Evaluation Methodology for Quantifying Network-wide Efficiency, Energy, Emission, and Safety Impacts of Operational-level Transportation Projects
… Global Positioning System (GPS) second-by-second speed measurements using fairly inexpensive GPS units to quantify the impacts of traffic-flow improvement projects on the efficiency, energy, and safety of a transportation network. It should be noted that the proposed methodology is incapable of …
-
The feasibility of sodar wind profile measurements from an oceanographic buoy
… thesis explores the feasibility of making wind speed profile measurements from an oceanographic buoy using a Doppler sodar. In the fall of 2005, we deployed a Scintec SFAS sodar on an ASIS buoy. Roughly one week of buoy motion data and one day of sodar observations were collected. Data from both …
-
Modelling the marine boundary layer for offshore wind power utilisation
… the land-sea discontinuity on the vertical wind speed profile has been investigated. The different models have than been used in a test application to extrapolate the wind speed from 10 m to 50 m height. They have also been compared with the standard resource assessment program WAsP.
-
SOFAR signal shaping : influence of topography and relative source depth
… and narrow undersea ridges and (3) a sound speed profile displaced downwards by a filament of warm surface water. Comparisons with ray trace and normal mode models show that some of the received signals consist of a combination of slower, refracted rays and faster rays reflected off Walvis …
-
An Efficient Knapsack-Based Approach for Calculating the Worst-Case Demand of AVR Tasks
… jobs a function of the crankshaft's angular speed and acceleration. In addition, several properties of the engine triggered tasks like the execution time and deadlines are dependent on the speed profile of the crankshaft. Such tasks are referred to as adaptive-variable rate (AVR) tasks. …
-
SAFE REINFORCEMENT LEARNING-BASED GREEN LIGHT OPTIMAL SPEED ADVISORY FOR MIXED-TRAFFIC PLATOONS
… safe RL-based Green Light Optimal Speed Advisory (GLOSA) system to optimize the CAV speed profile of a mixed-traffic platoon. First, we design a multi-agent RL algorithm to achieve a balance between the energy and travel efficiency of a mixed-traffic platoon, where the impact of the …
-
Projeto, fabricação e ensaio de dispositivo microfluídico para separação de células sanguíneas baseado no efeito Zweifach-Fung
… model adopted with experimental results with speed profile acquired through micro-PIV, mass balance and real cases using human and animal blood. Comparing the results presented by the literature, theoretical and experimental studies, it was verified that the separation efficiency has close …
-
Vehicle merging control for an automated highway system
… The entire merging process is divided the a speed adjustment stage and a lane merging stage. Three important parameters; acceptability, availability and pursuability are analyzed to characterize the AHS lane gap features. Three control guidance laws (linear, optimal and parabolic speed …
-
Efficient inversion methods in underwater acoustics
… implemented for source localization and sound speed and bottom depth estimation using sound propagation in the ocean. The proposed inversion techniques are based on the linearization of the generally non-linear inverse problem of parameter estimation in underwater acoustics. These techniques …
-
The control of reaching movements by young infants
… have tortuous handpaths and multipeaked speed curves. It has been hypothesised that these movements comprise sequences of ballistic motor units whose boundaries are marked by troughs in the speed-time curve. Error correction, if any, is assumed to take place between and not within these …
Page 1 of 3