Blar i Fakultet for informasjonsteknologi og elektroteknikk (Uspesifisert) på utgivelsesdato
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Nonlinear Topics in the Bayesian Approach to Inverse Problems with Applications to Seismic Inversion
(Dr. ingeniøravhandling, 0809-103X; 2002:55, Doctoral thesis, 2002)Paper I considers piecewise affine inverse problems. This is a large group of nonlinear inverse problems. Problems that obey certain variational structures are of this type. In inverse problems it is frequently such that ... -
Learning pronunciation variation: A data-driven approach to rule-based lecxicon adaptation for automatic speech recognition
(Dr.ingeniøravhandling, 0809-103X; 2002:100, Doctoral thesis, 2002)To achieve a robust system the variation seen for different speaking styles must be handled. An investigation of standard automatic speech recognition techniques for different speaking styles showed that lexical modelling ... -
Thermal fatigue in stationary aluminium contacts
(Doktoravhandlinger ved NTNU, 1503-8181; 2001:113, Doctoral thesis, 2002)The conductive area of a stationary electrical contact consists of many small contact spots. The contact spots can be described as narrow metal bridges across the interface between two conductors. Deterioration of a contact ... -
Suggested Methods for Preventing Core Saturation Instability in HVDC Transmission Systems
(Dr. ingeniøravhandling, 0809-103X; 2002:15, Doctoral thesis, 2002)In this thesis a study of the HVDC related phenomenon core saturation instability and methods to prevent this phenomenon is performed. It is reason to believe that this phenomenon caused disconnection of the Skagerrak HVDC ... -
Object Based Concurrency for Data Parallel Applications: Programmability and Effectiveness
(Dr.ingeniøravhandling, 0809-103X; 2002:83, Doctoral thesis, 2002)Increased programmability for concurrent applications in distributed systems requires automatic support for some of the concurrent computing aspects. These are: the decomposition of a program into parallel threads, the ... -
Knowledge Management in Medium-Sized Software Consulting Companies
(Dr. ingeniøravhandling, 0809-103X; 2002:10, Doctoral thesis, 2002) -
A Voltage Instability Predictor Using Local Area Measurements
(Dr. ingeniøravhandling, 0809-103X; 2002:21, Doctoral thesis, 2002)There has been a pressure to operate power systems closer to their security limits. This has partially been due to financial imperatives following the deregulating of markets. Other practical difficulties have been obtaining ... -
Topics in nonlinear control.: Output Feedback Stabilization and Control of Positive Systems
(Dr. ingeniøravhandling, 0809-103X; 2002:112, Doctoral thesis, 2002)The contributions of this thesis are in the area of control of systems with nonlinear dynamics. The thesis is divided into three parts. The two first parts are similar in the sense that they both consider output feedback ... -
Feature Extraction for Automatic Speech Recognition in Noisy Acoustic Environments
(Dr. ingeniøravhandling; 2002:60, Doctoral thesis, 2002)This thesis presents a study of alternative speech feature extraction methods aimed at increasing robustness of automatic speech recognition (ASR) against additive background noise. Spectral peak positions of speech ... -
Improved Receivers for Digital High Frequency Communications: Iterative Channel Estimation, Equalization, and Decoding (Adaptive Turbo Equalization)
(Dr. ingeniøravhandling, 0809-103X; 2002:128, Doctoral thesis, 2002)We address the problem of improving the throughput and the availability of digital communications in the High Frequency (HF, 3-30 MHz) band. In standardized military waveforms, the data is protected by an error-correcting ... -
Knowledge Representation for Relevance Ranking of Patient-Record Contents in Primary-Care Situations
(Dr. ingeniøravhandling, 0809-103X; 2002:144, Doctoral thesis, 2002)The computer-based patient-record system can play a significant role in physicians’ decision-making process by, for instance, presenting them with information they need from the record, relevant to care situations. However, ... -
Model-based User Interface Design
(Dr. ingeniøravhandling, 0809-103X; 2002:62, Doctoral thesis, 2002)This work is about supporting user interface design by means of explicit design representations, in particular models. We take as a starting point two different development traditions: the formal, analytic, topdown ... -
Sparse Signal Representation using Overlapping Frames
(Dr. ingeniøravhandling, 0809-103X; 2002:91, Doctoral thesis, 2002)Signal expansions using frames may be considered as generalizations of signal representations based on transforms and filter banks. Frames for sparse signal representations may be designed using an iterative method with ... -
Acceleration Feedback in Dynamic Positioning
(Dr. ingeniøravhandling, 0809-103X; 2003:74, Doctoral thesis, 2003)This dissertation contains new results on the design of dynamic positioning (DP) systems for marine surface vessels. A positioned ship is continuously exposed to environmental disturbances, and the objective of the DP ... -
Stochastic Modelling and Simulation Based Inference of Fish Population Dynamics and Spatial Variation in Disease Risk
(Dr. ingeniøravhandling, 0809-103X; 2003:22, Doctoral thesis, 2003)We present a non-Gaussian and non-linear state-space model for the population dynamics of cod along the Norwegian Skagerak coast, embedded in the framework of a Bayesian hierarchical model. The model takes into account ... -
Quality of Service, Traffic Conditioning and Resource Management in Universal Mobile Telecommunication System (UMTS)
(Dr. ingeniøravhandling, 0809-103X; 2003:6, Doctoral thesis, 2003)The successful deployment of Universal Mobile Telecommunication System (UMTS) is heavily dependent on Quality of Service (QoS) to be achieved. This thesis addresses a few facets of the QoS issues in UMTS, including traffic ... -
Mobiltelefon og helse rapport fra en ekspertgruppe opprettet etter oppdrag fra Helsedepartementet
(Research report, 2003) -
Supporting Relationships in Digital Libraries
(Doctoral thesis, 2003)The motivation for this work is based on two recognized research issues for digital libraries. One is the need for interlinked and semantically rich information spaces where relationship information is of particular ... -
Noise tolerant voltage-controlled LC oscillator circuits for deep submicron VLSI system-on-a-chip radio circuits
(Dr. ingeniøravhandling, 0809-103X; 2003:66, Doctoral thesis, 2003)This thesis studies the problems with maintaining the spectral purity of fully integrated VCO circuits for radio frequency synthesizers in single-chip system designs. LC tank circuit oscillator circuits are shown to convert ... -
Mathematical modelling and analysis of communication networks: transient characteristics of traffic processes and models for end-to-end delay and delay-jitter
(Doctoral thesis, 2003)The first part of the thesis (Part I) is devoted to find methods to describe transient behaviour of traffic processes, where the main emphasis is put on the description and analysis of excess periods and excess volumes of ...