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Articles 1 - 5 of 5
Full-Text Articles in Engineering
Development Of Self-Adaptive Back Propagation And Derivative Free Training Algorithms In Artificial Neural Networks, Shamsuddin Ahmed
Development Of Self-Adaptive Back Propagation And Derivative Free Training Algorithms In Artificial Neural Networks, Shamsuddin Ahmed
Theses: Doctorates and Masters
Three new iterative, dynamically self-adaptive, derivative-free and training parameter free artificial neural network (ANN) training algorithms are developed. They are defined as self-adaptive back propagation, multi-directional and restart ANN training algorithms. The descent direction in self-adaptive back propagation training is determined implicitly by a central difference approximation scheme, which chooses its step size according to the convergence behavior of the error function. This approach trains an ANN when the gradient information of the corresponding error function is not readily available. The self- adaptive variable learning rates per epoch are determined dynamically using a constrained interpolation search. As a result, appropriate …
The Application Of Object-Oriented Techniques To Preliminary Design Problems, Patrick S. Mackessy
The Application Of Object-Oriented Techniques To Preliminary Design Problems, Patrick S. Mackessy
Theses: Doctorates and Masters
Preliminary structural design is an early stage in building design during which the engineer formulates and assesses a number of different structural schemes. It is conceptual in nature and involves decision making, which relies on heuristics. Whilst preliminary structural design has not been well supported by PC software, recent research has indicated the potential for knowledge-based, object-oriented systems to assist in the area. This thesis explores the issues that arise when object-oriented techniques arc used to develop knowledge-based software. lt reviews certain basic principles of structural design, methods of representing structural design knowledge and earlier approaches to the design of …
Analogue-To-Digital Conversion And Image Enhancement Using Neuron-Mos Technology, Joseph W. Austin-Crowe
Analogue-To-Digital Conversion And Image Enhancement Using Neuron-Mos Technology, Joseph W. Austin-Crowe
Theses: Doctorates and Masters
This thesis describes the development of two novel circuits that use a newly developed technology, that of neuron-MOS, for the purposes of analogue-to-digital conversion and image enhancement. Neuron-MOS has the potential to reduce both the complexity and number of transistors required for analogue and digital circuits. A reduced area, low transistor-count- analogue-to-digital converter that is suitable for inclusion in a massively parallel array of identical image processing elements is developed. Supporting the function of the array some fundamental image enhancement operations, such as edge enhancement, are examined exploiting the unique features of neuron-MOS technology.
Intelligent Approaches To Vlsi Routing, Maolin Tang
Intelligent Approaches To Vlsi Routing, Maolin Tang
Theses: Doctorates and Masters
Very Large Scale Integrated-circuit (VLSI) routing involves many large-size and complex problems and most of them have been shown to be NP-hard or NP-complete. As a result, conventional approaches, which have been successfully used to handle relatively small-size routing problems, are not suitable to be used in tackling large-size routing problems because they lead to 'combinatorial explosion' in search space. Hence, there is a need for exploring more efficient routing approaches to be incorporated into today's VLSI routing system. This thesis strives to use intelligent approaches, including symbolic intelligence and computational intelligence, to solve three VLSI routing problems: Three-Dimensional (3-D) …
Bandwidth Management And Quality Of Service, Adalbert Engel
Bandwidth Management And Quality Of Service, Adalbert Engel
Theses: Doctorates and Masters
With the advent of bandwidth-hungry video and audio applications, demand for bandwidth is expected to exceed supply. Users will require more bandwidth and, as always, there are likely to be more users. As the Internet user base becomes more diverse, there is an increasing perception that Internet Service Providers (ISPs) should be able to differentiate between users, so that the specific needs of different types of users can be met. Differentiated services is seen as a possible solution to the bandwidth problem. Currently, however, the technology used on the Internet differentiates neither between users, nor between applications. The thesis focuses …