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 11 of 11 for “"H620 - Electrical engineering"”.
-
A technique for measuring the electrical impedance of mechanical joints in electrically conductive structures
… of the test coil with a uniform, homogeneous and electrically thick conducting sheet. The model quantifies the interaction of the coil and the surface by calculating the field around the coil in the frequency domain. The sheet is included by using reflection coefficients, calculated from defined …
-
The design and application of servo systems using stepper motors
Position control systems have for many years been essentially analogue in nature. Developments in stepper motors and semiconductor techniques have resulted in digitisation being possible. This thesis describes the stepper motor, its performance, and its application to position control systems in …
-
Models of the auditory threshold
The theory of signal detectability is introduced and audiological methods derived from the theory are discussed. In particular the two inter':al forced choice (2.I.F.C.) procedure in conjunction with an automatic threshold seeking method is selected for detailed study. Sequential strategies and …
-
Electromagnetic fields in relation to eddy current gauging
The work presented in this thesis describes some theoretical and experimental aspects of the relationships between electromagnetic fields and a non-contact type of eddy current gauge, which utilises a cylindrical solenoid and coaxially positioned metallic bar, either ferrous or non-ferrous. A …
-
An investigation into the design of a self adaptive digital temperature controller for industrial furnace control
The work presented in this thesis is directed towards the investigation of the possibilities of using adaptive or learning processes in order to achieve a greater degree of temperature control in a range of furnaces which are normally used for the heat treatment of metals. In this investigation the …
-
A Slotted Ring Test Bed for the Study of ATM Network Congestion Management
This thesis addresses issues raised by the proposed Broadband Integrated Services Digital Network which will provide a flexible combination of integrated services traffic through its cell-based Asynchronbus Transport Mode (ATM). The introduction of a cell-based, connection-oriented, transport mode …
-
Satellite Image Processing for Remote Sensing Applications
This thesis investigates areas of image compression with particular reference to remote sensing imagery. The research described was carried out in four specific areas, namely, discrete cosine transform (DCT) for remote sensing imagery, lossless image compression based on conditional statistics, …
-
Digital image processing of orbital synthetic aperture radar
Synthetic aperture radar (SAP) is gaining increasing importance in the field of remote sensing. The main feature of image data transmitted from orbital satellite synthetic aperture radar is all-weather performance, which explains its importance in many applications. Unfortunately SAP image data is …
-
A microprocessor-based interactive image processing system
As Electronic Component Technology advances, it has become possible to produce systems of vastly increased complexity with fewer components. This is nowhere more apparent than in the field of digital electronics, where a computer of fifteen years ago, comprising many thousands of transistors, has …
-
An investigation of neural networks for image processing applications
This thesis investigates areas of neural networks and their application to aspects of image processing. Three neural network models, namely the backpropagation network, the Hopfield network and the competitive network, are studied. First, the learning algorithms for backpropagation networks and …
-
Strength in Flexibility; Research into Innovative Flexible Bearing Designs for Wave Convertor Permanent Magnet Generators
Originally this research was to investigate the use of hydrostatic bearings in large linear machines, such as linear generators, and determine their viability in a power generation context. It quickly became clear that it was possible to make hydro-static bearings viable, however the methods …