Engineering Commons^™

Parameterized Implementation Of K-Means Clustering On Reconfigurable Systems, Venkatesh Bhaskaran

Masters Theses

Processing power of pattern classification algorithms on conventional platforms has not been able to keep up with exponentially growing datasets. However, algorithms such as k-means clustering include significant potential parallelism that could be exploited to enhance processing speed on conventional platforms. A better and effective solution to speed-up the algorithm performance is the use of a hardware assist since parallel kernels can be partitioned and concurrently run on hardware as opposed to the sequential software flow. A parameterized hardware implementation of k-means clustering is presented as a proof of concept on the Pilchard Reconfigurable computing system. The hardware implementation is …

Eliminating Harmonics In A Cascaded H-Bridges Multilevel Inverter Using Resultant Theory, Symmetric Polynomials, And Power Sums, Keith Jeremy Mckenzie

Masters Theses

This thesis studies a multilevel converter with assumed equal dc sources. The multilevel fundamental switching scheme is used to control the needed power electronics switches. Also, a method is presented where switching angles are computed such that a desired fundamental sinusoidal voltage is produced while at the same time certain higher order harmonics are eliminated.

Using Fourier Series theory, the transcendental equations eliminating certain higher order harmonics were derived in terms of the switching angles. Furthermore, these transcendental equations were transformed into polynomial equations by making some simple changes of variables. Resultant theory was used to solve the polynomial equations. …

Transmission And Reflection Method With A Material Filled Transmission Line For Measuring Dielectric Properties, Madhan Sundaram

Masters Theses

Measurement of the electromagnetic properties of a material sample with simpler procedures and greater accuracy is very desirable in the design of radio frequency and microwave equipment. Real-time complex calculations and instantaneous results are possible using modern measuring equipment such as the vector network analyzer. Measurement and analysis of various transmission line using S-parameters have been developed by others. In the thesis we have attempted to develop a simpler method to determine the complex permittivity and permeability using the transmission and reflection method with a material filled transmission line. Schemes for simultaneous measurement of the relative permeability and permittivity are …

Accelerating Exact Stochastic Simulation, James Michael Mccollum

Masters Theses

Currently, the applicability of computer modeling to whole-cell and multi-cell biochemical models is limited by the accuracy and efficiency of the simulation tools used to model gene regulatory networks. It is widely accepted that exact stochastic simulation algorithms, originally developed by Gillespie and improved by Gibson and Bruck, accurately depict the time-evolution of a spatially homogeneous biochemical model, but these algorithms are often abandoned by modelers because their execution time can be on the order of days to months. Other modeling techniques exist that simulate models much more quickly, such as approximate stochastic simulation and differential equations modeling, but these …

\Statmond: A Peer-To-Peer Status And Performance Monitor For Dynamic Resource Allocation On Parallel Computers, Krishna Kanth Inavolu

Masters Theses

This thesis presents a decentralized tool STATMOND - to monitor the status of a peer-to-peer network. STATMOND provides an accurate measurement scheme for parameters such as CPU load and memory utilization on Linux clusters. The services of STATMOND are ubiquitous in that each computer measures and for- wards its data over the network and also maintains the data of other nodes in memory. The data are periodically updated, and users on any node can ‘see‘ the status and performance of the network based on these parameters. This thesis describes the problems confronting cluster computing, the necessity of monitoring tools and …

Hyper-Spectral Image Processing Using High Performance Reconfigurable Computers, Yuan He

Masters Theses

The purpose of this thesis is to investigate the methods of implementing a section of a Matlab hyper-spectral image processing software application into a digital system that operates on a High Performance Reconfigurable Computer. The work presented is concerned with the architecture, the design techniques, and the models of digital systems that are necessary to achieve the best overall performance on HPRC platforms. The application is an image-processing tool that detects the tumors in a chicken using analysis of a hyper-spectral image. Analysis of the original Matlab code has shown that it gives low performance in achieving the result. The …

Design And Implementation Of An All Digital Phase Locked Loop Using A Pulse Output Direct Digital Frequency Synthesizer, Akila Gothandaraman

Masters Theses

Phase Locked Loops (PLLs) are widely used in clock recovery and frequency synthesis. Fully Digital PLLs are more suitable for the monolithic implementation with other circuits compared to the traditional implementations of the PLLs. The All Digital PLLs are also independent of process variations and can be easily ported to different technologies.

This thesis presents the design of an All Digital Phase Locked Loop (ADPLL) using a pulse output Direct Digital Frequency Synthesizer (DDFS) and an All Digital Phase Frequency Detector (ADPFD). General design criteria are summarized for the all digital implementation in comparison to the traditional approaches and analog …

Time-Resolved Measurements Of Plasma Electron Number Density And Electron-Neutral Collision Frequency Using A Microwave Diagnostic Method, Yunqiang Yang

Masters Theses

Microwave interferometry is an established non-perturbing plasma diagnostic technique. Compared with other diagnostic techniques, it can be more robust and reliable in experimental applications. This thesis studies a simple and accurate microwave diagnostic method to characterize the electron number density and electron-neutral collision frequency, which are crucial to understanding the behavior and transport coefficients of plasma. This method is based on a modern vector network analyzer and measures the attenuation and phase shift of a microwave signal when propagating through a plasma layer. These measured quantities are related to the real and imaginary parts of the plasma index of refraction, …