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Early Component-Based Reliability Assessment Using Uml Based Software Models, William Black Smith V
Early Component-Based Reliability Assessment Using Uml Based Software Models, William Black Smith V
Graduate Theses, Dissertations, and Problem Reports
In the last decade, software has grown in complexity and size, while development timelines have diminished. As a result, component-based software engineering is becoming routine. Component-based software reliability assessment combines the architecture of the system with the reliability of the components to obtain the system reliability. This allows developers to produce a reliable system and testers to focus on the vulnerable areas.;This thesis discusses a tool developed to implement the methodology previously created for early reliability assessment of component-based systems. The tool, Early Component-based Reliability Assessment (ECRA), uses Rational Rose Unified Modeling Language (UML) diagrams to predict the reliability of …
Operating Market Based Regulation Service Using Software Agents Compliant With Nerc's Control Performance Standards, Ramanujam Srinivasan
Operating Market Based Regulation Service Using Software Agents Compliant With Nerc's Control Performance Standards, Ramanujam Srinivasan
Graduate Theses, Dissertations, and Problem Reports
With the changing scenario for procurement of energy it becomes necessary to understand the process of obtaining energy from a diverse set of suppliers capable of providing substantial amounts of electric power at competitive prices. Sufficient insight has been gained in the energy brokerage system design and planning owing to experiences in the recently established markets especially the California market. It becomes contextual to analyze and understand the procurement of ancillary services, which are generally bundled as part of the wholesale energy supply chain, using a similarly competitive environment having a number of players that provide electric power for such …
Aisimam - An Artificial Immune System Based Intelligent Multiangent Model, Srividhya Sathyanath
Aisimam - An Artificial Immune System Based Intelligent Multiangent Model, Srividhya Sathyanath
Theses
The goal of this thesis is to develop a biological model for multiagent systems. This thesis explores artificial immune systems, a novel evolutionary paradigm based on the immunological principles. Artificial Immune systems (AIS) are found to be powerful to solve complex computational tasks. The main focus of the thesis is to develop a generic mathematical model that uses the principles of the human immune system in multiagent systems (MAS). The components and properties of the human immune system are studied. On understanding the concepts of A/5, a literature survey of multiagent systems is performed to understand and compare the multiagent …
Variable Bit Rate Video Time-Series And Scene Modeling Using Discrete-Time Statistically Self-Similar Systems, Rajesh Narasimha
Variable Bit Rate Video Time-Series And Scene Modeling Using Discrete-Time Statistically Self-Similar Systems, Rajesh Narasimha
Theses
This thesis investigates the application of discrete-time statistically self-similar (DTSS) systems to modeling of variable bit rate (VBR) video traffic data. The work is motivated by the fact that while VBR video has been characterized as self-similar by various researchers, models based on self-similarity considerations have not been previously studied. Given the relationship between self-similarity and long-range dependence the potential for using DTSS model in applications involving modeling of VBR MPEG video traffic data is presented. This thesis initially explores the characteristic properties of the model and then establishes relationships between the discrete-time self-similar model and fractional order transfer function …
A Three-Dimensional Ray Tracing Simulation Of A Synthetic Aperture Ground Penetrating Radar System, James Iii Jeter
A Three-Dimensional Ray Tracing Simulation Of A Synthetic Aperture Ground Penetrating Radar System, James Iii Jeter
Theses
Ground Penetrating Radar (GPR) is a useful tool for imaging the area below the Earth's surface. GPR works on the same principle as traditional radar, evaluating the electromagnetic returns reflected from an object or scene of interest to determine characteristics of the object that reflected the signal. Synthetic Aperture Radar (SAR) is a technique which combines radar returns of a given scene collected at several positions. By compiling the information contained in the returns, an image of a scene can be generated. Combining these two concepts allows us to create an image of an underground scene. Air Force Research Lab, …
Optimal Design Of A 2.4 Ghz Cmos Low Noise Amplifier, Sharmila Sridharan
Optimal Design Of A 2.4 Ghz Cmos Low Noise Amplifier, Sharmila Sridharan
Theses
In most RF receivers, the Low Noise Amplifier (LNA) is normally the first component, whose performance is very critical. For the LNA architecture that uses source degeneration inductors and cascode topology, the performance depends largely on the performance of the inductors. All the parasitics associated with the inductors should be thoroughly analyzed and taken into consideration while designing the LNA. The work presented in this thesis can be broadly classified as follows: optimization of the LNA design with respect to all the parasitics associated with the on-chip spiral inductors, modeling high performance inductors, which are embedded in the silicon substrate …
Picasso: The Use Of Network Delay Compensation To Improve The Response Of A Tele-Robotic Application, Sara North
Picasso: The Use Of Network Delay Compensation To Improve The Response Of A Tele-Robotic Application, Sara North
Theses
This thesis shows the benefits of network delay compensation over an arbitrary Internet connection for a tele-robotic application. The tele-robotic system, named Picasso, is set up in the Systems Laboratory of the Electrical Engineering Department at the Rochester Institute of Technology. Picasso is a robotic arm that users can connect to via the Internet and draw with. This thesis demonstrates that varying the arm speed based on the predicted time-to-next packet results in smoother motion by the arm and a more accurate representation of what the user is drawing on the screen. The method chosen to predict the time-to-next packet …
A Study Of Clutter Reduction Techniques In Wide Bandwidth Hf/Vhf Deep Ground Penetrating Radar, Darien Hammett
A Study Of Clutter Reduction Techniques In Wide Bandwidth Hf/Vhf Deep Ground Penetrating Radar, Darien Hammett
Theses
Reducing clutter is one of the most daunting problems a radar processing engineer faces. Clutter causes a significant problem when attempting to detect sub-surface targets, as any significant change in the ground dielectric will produce a return at the receiver. The difficulty in reducing the clutter is compounded by the fact that the spectral characteristics of the clutter are similar to that of the target. While there are many methods that exist to reduce clutter, few do not require a priori information of either the target or the clutter. There are applications, of interest to the electromagnetic community, that are …
Passive Amplitude-Modulated Microwave Backscatter Modulation System, Aaron Thompson
Passive Amplitude-Modulated Microwave Backscatter Modulation System, Aaron Thompson
Theses
Barcode technology is slowly being replaced with transponder tags that have many benefits over barcodes. Four issues with transponder tags are battery life, power requirement, range of communication, and physical size. Microwave backscatter modulation (MBM) is used throughout industry to reduce the power requirement and size on the transponder tags while compromising range. Researchers and designers of current transponder tags typically utilize a passive carrier-present carrier-absent (CPCA) reflection of the reader's carrier wave, or their transponder design uses an active backscatter system with an amplifier and circular polarization modulation. This research project develops a communication system that mixes a reader's …
Telecommunications For A Deregulated Power Industry, Biju Naduvathuparambil
Telecommunications For A Deregulated Power Industry, Biju Naduvathuparambil
Graduate Theses, Dissertations, and Problem Reports
Telecommunication plays a very important role in the effective monitoring and control of the power grid. Deregulation of the US power industry has enabled utilities to explore various communication options and advanced technologies. Utilities are increasingly investing in distributed resources, dynamic real-time monitoring, automated meter reading, and value added services like home energy management systems and broadband access for its customers. Telecommunication options like power line communications (PLC) and satellites are fast replacing legacy telephone and microwave systems in the US.;The objective of this thesis is to study the communication options that are available for utilities today. Phasor measurement units …
Modeling And Dynamic Stability Of Distributed Generations, Zhixin Miao
Modeling And Dynamic Stability Of Distributed Generations, Zhixin Miao
Graduate Theses, Dissertations, and Problem Reports
The objective of this dissertation is to develop dynamic models for distributed generations (DG), to investigate their impacts on dynamic stability of power distribution systems, and to design controllers for DGs to improve the dynamic stability of the integrated power distribution system.;A two-year distributed generation (DG) project at West Virginia University (WVU) evaluated the impact of various DG sources on actual distribution systems by performing computer simulations. The data is supplied by two regional electric utilities of two actual distribution systems each. In this project several important issues were investigated, including the availability of simulation tools and impacts of DGs …
Dependence Of Vco Jitter On Coupled Noise, Harikrishna Parthasarathy
Dependence Of Vco Jitter On Coupled Noise, Harikrishna Parthasarathy
Theses
In mixed signal systems, the Phase Locked Loop (PLL) forms an integral part of the clock distribution scheme. The PLL is used to generate a local clock frequency, which is much higher than the external clock. The performance of a PLL is greatly influenced by the Voltage Controlled Oscillator (VCO). Any nonlinearity introduced by the VCO affects the synchronization between operation of on-chip circuitry and the external components. The jitter or phase noise of a VCO is the most important non-ideality. Phase noise or jitter becomes critical as system frequency increases. The source of timing error maybe due to various …
Power Distribution Design For High-Density Packages, Ghanshyam Nayak
Power Distribution Design For High-Density Packages, Ghanshyam Nayak
Theses
This thesis describes the design of a high-density power distribution system. Properties of impedances of power distribution systems are examined. Impedances are classified as self and trans-impedances. These properties are then used to save simulation time, which is a big factor for power distribution system design. Time domain models are extracted for the test cases. A novel 2D-3D technique of placing decoupling capacitors is demonstrated that is based on the effectiveness of the capacitor at that location. The power distribution system acts as a cavity resonator supporting discrete modes that vary with distance. Each capacitor is placed at the physical …
Automatic Indoor/Outdoor Scene Classification, Navid Serrano
Automatic Indoor/Outdoor Scene Classification, Navid Serrano
Theses
The advent and wide acceptance of digital imaging technology has motivated an upsurge in research focused on managing the ever-growing number of digital images. Current research in image manipulation represents a general shift in the field of computer vision from traditional image analysis based on low-level features (e.g. color and texture) to semantic scene understanding based on high-level features (e.g. grass and sky). One particular area of investigation is scene categorization, where the organization of a large number of images is treated as a classification problem. Generally, the classification involves mapping a set of traditional low-level features to semantically meaningful …
Parameter Identification Of Induction Motor Using A Genetic Algorithm, Edina Bajrektarevic
Parameter Identification Of Induction Motor Using A Genetic Algorithm, Edina Bajrektarevic
Graduate Theses, Dissertations, and Problem Reports
High performance variable-speed machines incorporate a model for the system in either the controller or state estimation stages. The accuracy and general robustness of the machine is dependant on this model. Therefore, it must accurately represent both the electrical and electromagnetic interactions within the machine and associated mechanical systems. Recently, some new technologies have been tested in the field of electromechanics like neural networks, fuzzy logic, simulated annealing and genetic algorithms. These methods are increasingly being utilized in solving electric machine problems.;In this thesis, a genetic algorithm (GA)---a form of artificial intelligence---is employed to identify the electric parameters of induction …
Design Of A Prototype Personal Static Var Compensator, Scott Alan Zemerick
Design Of A Prototype Personal Static Var Compensator, Scott Alan Zemerick
Graduate Theses, Dissertations, and Problem Reports
The focus of this thesis is the design and implementation of a personal static var compensator (PSVC) for distributed var control through load power factor correction. The PSVC demonstrates the two key benefits of power factor correction, which include decreased power costs and increased system capacity. The PSVC prototype consists of two types of branches---a TSC branch and a TCR branch. A microprocessor is responsible for calculating the load displacement power factor (PFD) and for executing the fuzzy logic control scheme for the two branches. The PSVC was found to reduce the RMS current drawn by a 55-watt AC motor …
Pulse Charging Lead-Acid Batteries To Improve Performance And Reverse The Effects Of Sulfation, Robert B. Cooper
Pulse Charging Lead-Acid Batteries To Improve Performance And Reverse The Effects Of Sulfation, Robert B. Cooper
Graduate Theses, Dissertations, and Problem Reports
When lead-acid batteries are improperly charged or discharged, useful power delivered to loads diminishes. One cause for this is a phenomenon generally referred to as sulfation. One possible method that has been proposed by many to reverse the effects of sulfation is to recharge the lead-acid battery using a pulse charger. To gain a better understanding of the possible benefits of this type of charging, a pulse charger/discharger was constructed. Cycle testing was then done on six pairs of batteries to compare the pulse charged batteries to conventional full-wave rectifier charged batteries. The results of the tests showed that pulse …
Integrated Through -Wafer Optical Monitoring Of Mems For Closed -Loop Control, Jeremy Michael Dawson
Integrated Through -Wafer Optical Monitoring Of Mems For Closed -Loop Control, Jeremy Michael Dawson
Graduate Theses, Dissertations, and Problem Reports
Current trends in many microelectronic systems show an increased use of microelectromechanical systems (MEMS) to perform a variety of tasks. The increased market for MEMS has led to microsystem technologies being employed in physically demanding environments and safety critical applications. This creates the need for higher degrees of certainty in MEMS operation, especially in systems that contain drive components operating under time varying load conditions. Situations such as these give rise to the need for detailed knowledge of the operational states of MEMS over the lifetime of the device, as well as device fault detection. Accurately obtaining this information by …
Tone Classification Of Syllable -Segmented Thai Speech Based On Multilayer Perceptron, Nuttavudh Satravaha
Tone Classification Of Syllable -Segmented Thai Speech Based On Multilayer Perceptron, Nuttavudh Satravaha
Graduate Theses, Dissertations, and Problem Reports
Thai is a monosyllabic and tonal language. Thai makes use of tone to convey lexical information about the meaning of a syllable. Thai has five distinctive tones and each tone is well represented by a single F0 contour pattern. In general, a Thai syllable with a different tone has a different lexical meaning. Thus, to completely recognize a spoken Thai syllable, a speech recognition system has not only to recognize a base syllable but also to correctly identify a tone. Hence, tone classification of Thai speech is an essential part of a Thai speech recognition system.;In this study, a tone …
Electrical Impedance Of Methane Flat Flame, Jeffrey William Rinker
Electrical Impedance Of Methane Flat Flame, Jeffrey William Rinker
Graduate Theses, Dissertations, and Problem Reports
As part of an ongoing effort to improve emissions and increase efficiency of natural gas fired turbines, this work was undertaken to determine if electrical impedance measurements of the flame are a direct indication of fuel/air ratio. Previous worked measured electrical resistance of the combustion of gases in an atmospheric combustor. From this work, it was conjectured that the complex impedance might provide more information about the flame than using pure resistance. This thesis discusses the measurement of the complex electrical impedance of a Methane Flat Flame Burner. The data shows a relationship between the magnitude of the impedance and …
Analysis And Robust Decentralized Control Of Power Systems Using Facts Devices, Karl E. Schoder
Analysis And Robust Decentralized Control Of Power Systems Using Facts Devices, Karl E. Schoder
Graduate Theses, Dissertations, and Problem Reports
Today's changing electric power systems create a growing need for flexible, reliable, fast responding, and accurate answers to questions of analysis, simulation, and design in the fields of electric power generation, transmission, distribution, and consumption. The Flexible Alternating Current Transmission Systems (FACTS) technology program utilizes power electronics components to replace conventional mechanical elements yielding increased flexibility in controlling the electric power system. Benefits include decreased response times and improved overall dynamic system behavior. FACTS devices allow the design of new control strategies, e.g., independent control of active and reactive power flows, which were not realizable a decade ago. However, FACTS …