Improving Range Estimation Of A 3d Flash Ladar Via Blind Deconvolution,
2010
Air Force Institute of Technology
Improving Range Estimation Of A 3d Flash Ladar Via Blind Deconvolution, Jason R. Mcmahon
Theses and Dissertations
The purpose of this research effort is to improve and characterize range estimation in a three-dimensional FLASH LAser Detection And Ranging (3D FLASH LADAR) by investigating spatial dimension blurring effects. The myriad of emerging applications for 3D FLASH LADAR both as primary and supplemental sensor necessitate superior performance including accurate range estimates. Along with range information, this sensor also provides an imaging or laser vision capability. Consequently, accurate range estimates would also greatly aid in image quality of a target or remote scene under interrogation. Unlike previous efforts, this research accounts for pixel coupling by defining the range image mathematical …
Determining The Index Of Refraction Of An Unknown Object Using Passive Polarimetric Imagery Degraded By Atmospheric Turbulence,
2010
Air Force Institute of Technology
Determining The Index Of Refraction Of An Unknown Object Using Passive Polarimetric Imagery Degraded By Atmospheric Turbulence, Milo W. Hyde Iv
Theses and Dissertations
In this research, an algorithm is developed to estimate the index of refraction of an unknown object using passive polarimetric images degraded by atmospheric turbulence. The algorithm uses a variant of the maximum-likelihood blind-deconvolution algorithm developed by LeMaster and Cain to recover the true object (i.e., the first Stokes parameter), the degree of linear polarization, and the polarimetric-image point spread functions. Nonlinear least squares is then used to find the value of the complex index of refraction which best fits the theoretical degree of linear polarization, derived using a polarimetric bidirectional reflectance distribution function, to the turbulence-corrected degree of linear …
Applying Image Matching To Video Analysis,
2010
Air Force Institute of Technology
Applying Image Matching To Video Analysis, Adam J. Behring
Theses and Dissertations
Dealing with the volume of multimedia collected on a daily basis for intelligence gathering and digital forensics investigations requires significant manual analysis. A component of this problem is that a video may be reanalyzed that has already been analyzed. Identifying duplicate video sequences is difficult due to differences in videos of varying quality and size. This research uses a kd-tree structure to increase image matching speed. Keypoints are generated and added to a kd-tree of a large dimensionality (128 dimensions). All of the keypoints for the set of images are used to construct a global kd-tree, which allows nearest neighbor …
Multi-Domain Crankback Operation For Ip/Mpls & Dwdm Networks,
2010
University of New Mexico
Multi-Domain Crankback Operation For Ip/Mpls & Dwdm Networks, Fareena Saqib
Electrical and Computer Engineering ETDs
Network carriers and operators have built and deployed a very wide range of networking technologies to meet their customers needs. These include ultra scalable fibre-optic backbone networks based upon dense wavelength division multiplexing (DWDM) solutions as well as advanced layer 2/3 IP multiprotocol label switching (MPLS) and Ethernet technologies as well. A range of networking control protocols has also been developed to implement service provisioning and management across these networks. As these infrastructures have been deployed, a range of new challenges have started to emerge. In particular, a major issue is that of provisioning connection services between networks running across …
Analysis Of Alternative Methods For Long-Term Wind Speed And Initial Site Assessment For Purposes Of Wind Energy Production Estimation,
2010
Rowan University
Analysis Of Alternative Methods For Long-Term Wind Speed And Initial Site Assessment For Purposes Of Wind Energy Production Estimation, Ryan Mcdevitt
Theses and Dissertations
A need exists for identification and evaluation of viable sites for wind energy. However, this is made difficult by the site-specific nature of the wind. A review of current industry practices shows that linear regression is the preferred method, although little work has been done to investigate alternative approaches. To address this, various methods were tested on 23 target sites with data measured over a long-term period. Each site was analyzed with the chosen best reference station, across 10 data periods for each method with results classified as mean absolute percentage error in energy density between the projected and measured …
A More Robust Ant Colony Learning Algorithm : With Application To Travelling Salesman Problem,
2010
University of New Mexico
A More Robust Ant Colony Learning Algorithm : With Application To Travelling Salesman Problem, Viswanath Nandina
Electrical and Computer Engineering ETDs
Graph problems model many real life applications, where the quantity of the nodes often changes with time. In such graphs, the evaluation of shortest tour is important as various guiding and navigation systems use this information. Nodes of a graph, in many applications, often change over time, and evaluation of shortest tour is essential whenever a new node is added or deleted. We propose an algorithm that deals with such situations. We have used the Ant System with a different meta-heuristics, to find the shortest tour in a graph. We have analyzed the performance of our proposed algorithm with other …
The Application Of Multi Frequency Resonant Controllers In In A Dfig To Improve Performance By Reducing Unwanted Power And Torque Pulsations And Reducing Current Harmonics.,
2010
Technological University Dublin
The Application Of Multi Frequency Resonant Controllers In In A Dfig To Improve Performance By Reducing Unwanted Power And Torque Pulsations And Reducing Current Harmonics., Joseph Kearney, Michael Conlon, Eugene Coyle
Conference papers
The paper describes a method to control the rotor-side and grid side converters in a DFIG when subjected to the effects of network voltage unbalance conditions. Multi Frequency Resonant Controllers are incorporated into the grid side and rotor side converters to assist in the control functions. The Resonant Controllers are tuned to twice the network frequency to assist in the control of power and torque pulsations and to three times the network frequency to assist in the control of the generated third harmonic currents. A DFIG model is implemented in Matlab/Simulink and simulations show the reduction in power and torque …
The Application Of Multi Frequency Resonant Controllers In In A Dfig To Improve Performance By Reducing Unwanted Power And Torque Pulsations And Reducing Current Harmonics.,
2010
Technological University Dublin
The Application Of Multi Frequency Resonant Controllers In In A Dfig To Improve Performance By Reducing Unwanted Power And Torque Pulsations And Reducing Current Harmonics., Joseph Kearney, Michael Conlon, Eugene Coyle
Conference papers
The paper describes a method to control the rotor-side and grid side converters in a DFIG when subjected to the effects of network voltage unbalance conditions. Multi Frequency Resonant Controllers are incorporated into the grid side and rotor side converters to assist in the control functions. The Resonant Controllers are tuned to twice the network frequency to assist in the control of power and torque pulsations and to three times the network frequency to assist in the control of the generated third harmonic currents. A DFIG model is implemented in Matlab/Simulink and simulations show the reduction in power and torque …
Characterization Of The Dynamics Of Optically-Injected Nanostructure Lasers,
2010
University of New Mexico
Characterization Of The Dynamics Of Optically-Injected Nanostructure Lasers, Michael Pochet
Electrical and Computer Engineering ETDs
The direct-modulation of semiconductor lasers is the simplest and most compact approach to pass data onto an optical fiber; however, their intrinsic limitations under direct-modulation such as wavelength chirp and inherent relaxation oscillation frequency constraints impede their high-speed and long-distance capabilities. The injection-locking of semiconductor lasers improves the injected laser's operational characteristics under direct-modulation, attracting a large degree of interest over the past decade. These improvements include increasing the modulation bandwidth through the enhancement of the resonance frequency, suppressing nonlinear distortion, and reducing relative intensity noise, mode-hopping, and chirp. The nonlinear dynamics associated with optically-injected semiconductor lasers has also attracted …
2-D Modeling Of Electromagnetic Waves With Vibrating Conducting And Dielectric Objects,
2010
University of New Mexico
2-D Modeling Of Electromagnetic Waves With Vibrating Conducting And Dielectric Objects, Monica Jaramillo-Madrid
Electrical and Computer Engineering ETDs
This Thesis provides an analysis of the interaction of electromagnetic pulses with vibrating conducting and dielectric objects. Two-dimensional full-vector Maxwells equations finite-difference time-domain (FDTD) models are employed that include total-field scattered-field incident plane wave source conditions, a frequency domain near-to-far-field transformation, convolutional perfectly matched layer boundary conditions and an advanced surface boundary condition that accommodates the surface perturbations of the vibrating objects. Reflection and diffraction of incident plane waves are calculated for stationary and vibrating objects and the diffraction coefficient for vibrating right-angle corners are obtained. The work of this Thesis may have application to the interaction of radar pulses …
Design Of A Low-Cost Underwater Acoustic Modem,
2010
University of California - Santa Barbara
Design Of A Low-Cost Underwater Acoustic Modem, Bridget Benson, Ying Li, Brian Faunce, Kenneth Domond, Don Kimball, Curt Schurgers, Ryan Kastner
Electrical Engineering
There has been an increasing interest in creating short-range, low data rate, underwater wireless sensor networks for scientific marine exploration and monitoring. However, the lack of an inexpensive, underwater acoustic modem is preventing the proliferation of these sensor networks. Thus, we are building an underwater acoustic modem starting with the most critical component from a cost perspective-the transducer. The design substitutes a commercial transducer with a homemade transducer using cheap piezoceramic material and builds the rest of the modem's components around the properties of the transducer to extract as much performance as possible. This letter describes the high level design, …
Iphone 3gs Forensics: Logical Analysis Using Apple Itunes Backup Utility,
2010
Zayed University
Iphone 3gs Forensics: Logical Analysis Using Apple Itunes Backup Utility, Mona Bader, Ibrahim Baggili
Electrical & Computer Engineering and Computer Science Faculty Publications
The iPhone mobile is used worldwide due to its enhanced computing capabilities, increased storage capacity as well as its attractive touch interface. These characteristics made the iPhone a popular smart phone device. The increased use of the iPhone lead it to become a potential source of digital evidence in criminal investigations. Therefore, iPhone forensics turned into an essential practice for forensic and security practitioners today. This research aimed at investigating and examining the logical backup acquisition of the iPhone 3GS mobile device using the Apple iTunes backup utility. It was found that significant data of forensic value such as e-mail …
Modeling Of Micro-Diaphragm For Optical Pressure Sensor For Human Artery Pulse Wave Detection.,
2010
Universiti Malaya
Modeling Of Micro-Diaphragm For Optical Pressure Sensor For Human Artery Pulse Wave Detection., Khairunnisa Hasikin
Student Works (2010-2019)
This thesis presents the development of a micro-diaphragm for an optical pulse pressure sensor using Micro-electro-mechanical Systems (MEMS) technology. Modelling of the micro-diaphragm was conducted and the comparison of its performance was simulated for silicon nitride and polyirnide materials. In addition. diaphragm's radius and thickness were varied to further analyze the performance of the micro-diaphragm. There are three design parameters that affecting the micro-diaphragm performance namely diaphragms radius. thickness and material. Thus, an optimization analysis using Taguchi method was done to attain significant design parameters that give the best micro-diaphragm performance. Findings indicated that the best performance of the micro-diaphragm …
User's Guide To Mbc3: Multi-Blade Coordinate Transformation Code For 3-Bladed Wind Turbine,
2010
National Renewable Energy Laboratory
User's Guide To Mbc3: Multi-Blade Coordinate Transformation Code For 3-Bladed Wind Turbine, G. S. Bir
Publications (E)
The dynamics of wind turbine rotor blades are conventionally expressed in rotating frames attached to the individual blades. The tower-nacelle subsystem though, sees the combined effect of all rotor blades, not the individual blades. Also, the rotor responds as a whole to excitations such as aerodynamic gusts, control inputs, and tower-nacelle motion—all of which occur in a nonrotating frame. Multi-blade coordinate transformation (MBC) helps integrate the dynamics of individual blades and express them in a fixed (nonrotating) frame. MBC involves two steps: transforming the rotating degrees of freedom and transforming the equations of motion. Reference 1 details the MBC operation. …
Green Power Marketing In The United States: A Status Report (2009 Data),
2010
National Renewable Energy Laboratory
Green Power Marketing In The United States: A Status Report (2009 Data), Lori Bird, Jenny Sumner
Publications (E)
This report documents green power marketing activities and trends in the United States. Aggregate green power sales data for all voluntary purchase markets across the United States are presented for 2009. The data presented in this report are based primarily on figures provided to NREL by utilities and independent renewable energy marketers. Because data cannot be obtained from all market participants, the estimates presented here likely represent an underestimate of the market size. Key trends identified in this year’s report include:
• In 2009, total retail sales of renewable energy in voluntary markets exceeded 30 million MWh, an increase of …
Physics-Based Inductance Extraction For Via Arrays In Parallel Planes For Power Distribution Network Design,
2010
Missouri University of Science and Technology
Physics-Based Inductance Extraction For Via Arrays In Parallel Planes For Power Distribution Network Design, Jingook Kim, Liehui Ren, Jun Fan
Electrical and Computer Engineering Faculty Research & Creative Works
A systematic approach for inductance extraction for via arrays between two parallel planes is presented. Both self and mutual inductance values are obtained based on a cavity model. the physics associated with the via inductances is analyzed, and a rigorous method is developed to derive an equivalent total inductance for multiple via arrays. Analytical equations for the equivalent total inductance are derived in closed forms for simple cases. the proposed method is corroborated with measurements, and application of the method for power distribution network designs is demonstrated. © 2010 IEEE.
Hamiltonian Theory Based Coordinated Nonlinear Control Of Generator Excitation And Statcoms,
2010
Missouri University of Science and Technology
Hamiltonian Theory Based Coordinated Nonlinear Control Of Generator Excitation And Statcoms, Keyou Wang, Mariesa Crow
Electrical and Computer Engineering Faculty Research & Creative Works
A coordinated controller for generator excitation and STATCOMs is studied based on the Hamiltonian function method. The Hamiltonian realization structure for multimachine power systems including STATCOMs is developed leading to a proposed coordinated scheme of excitation control and STATCOM control. Simulation results illustrate the effectiveness of the proposed control strategy.
Adaptive Quadrant Filter Based Phase Locked Loop System,
2010
Missouri University of Science and Technology
Adaptive Quadrant Filter Based Phase Locked Loop System, L. Shi, Mariesa Crow
Electrical and Computer Engineering Faculty Research & Creative Works
Phase-Locked-Loop (PLL) is one of the key technologies extensively used in grid connected power electronics system. A good PLL system can detect the grid phase angle and frequency fast and accurately, and additionally it can extract the positive sequence (or fundamental component for single phase system) exactly. In real applications, source signal (voltage or current) sensed for PLL usually includes harmonic distortion, unbalanced components, noises and frequency variations. Conventional PLL strategy cannot solve all the problems, especially the unbalanced and harmonic distortion. There is a trade-off between the dynamic response and phase angle tracking accuracy. Different PLL solutions are proposed …
Efficient Utilization Of Renewable Energy Sources By Gridable Vehicles In Cyber-Physical Energy Systems,
2010
Missouri University of Science and Technology
Efficient Utilization Of Renewable Energy Sources By Gridable Vehicles In Cyber-Physical Energy Systems, Ahmed Yousuf Saber, Ganesh K. Venayagamoorthy
Electrical and Computer Engineering Faculty Research & Creative Works
The main sources of emission today are from the electric power and transportation sectors. One of the main goals of a cyber-physical energy system (CPES) is the integration of renewable energy sources and grid able vehicles (GVs) to maximize emission reduction. GVs can be used as loads, sources and energy storages in CPES. a large CPES is very complex considering all conventional and green distributed energy resources, dynamic data from sensors, and smart operations (e.g., charging/discharging, control, etc.) from/to the grid to reduce both cost and emission. If large number of GVs are connected to the electric grid randomly, peak …
Integration Of Antennas And Solar Cells For Autonomous Communication Systems,
2010
Technological University Dublin
Integration Of Antennas And Solar Cells For Autonomous Communication Systems, Maria Jose Roo Ons
Doctoral
Solar energy is becoming an attractive alternative for powering autonomous communication systems. These devices often involve the use of separate photovoltaics and antennas, which demand a compromise in the utilization of the limited space available. This thesis deals with the design, analysis, fabrication and validation of different techniques for the integration of antennas and solar cells in a single multifunctional device. Four different photovoltaic technologies are considered within this work, namely, polycrystalline silicon (poly-Si), monocrystalline (mono-Si) emitter-wrap-through (EWT) rear contact solar cells, amorphous silicon (a-Si) thin film on glass substrate, and bifacial solar cells. The use of a poly-Si solar …
