During development of any kind, the testing process is a big part in terms of time and money. Automating the testing procedure to run regression tests more frequent and in an effective manner makes the development phase a simpler and more development focused activity. This thesis will study the possibility of automating the release testing of new platforms by using statistical tolerances on ABB FACTS products. To do this, a research and literature study regarding tolerances within control systems and automated testing including regression testing is used. The result of the study presents a proof of concept that the release testing can be automated using statistical tolerances as verification.

"A mobile ultrasound system has been developed, which makes ultrasound examinations possible in harsh environments without reliable power sources, such as ambulances, helicopters, war zones, and disaster sites. The goal of this project was to analyze three different wireless communication technologies that could be integrated into the ultrasound system for possible utilization in remote data applications where medical information may be transmitted from the mobile unit to some centralized base station, such as an emergency room or field hospital. By incorporating wireless telecommunication technology into the design, on site medical personnel can be assisted in diagnostic decisions by remote medical experts. The wireless options that have been tested include the IEEE 802.11g standard, mobile broadband cards on a 3G cellular network, and a mobile satellite terminal. Each technology was tested in two phases. In the first phase, a client/server application was developed to measure and record general information about the quality of each link. Four different types of tests were developed to measure channel properties such as data rate, latency, inter-arrival jitter, and packet loss using various signal strengths, packet sizes, network protocols, and traffic loads. In the second phase of testing, the H.264 Scalable Video Codec (SVC) was used to transmit real-time ultrasound video streams over each of the wireless links to observe the image quality as well as the diagnostic value of the received video stream. The information gathered during both testing phases revealed the abilities and limitations of the different wireless technologies. The results from the performance testing will be valuable in the future for those trying to develop network applications for telemedicine procedures over these wireless telecommunication options. Additionally, the testing demonstrated that the system is currently capable of using H.264 SVC compression to transmit VGA quality ultrasound video at 30 frames per second (fps) over 802.11g while QVGA resolution at frame rates between 10 and 15 fps is possible over 3G and satellite networks."

Orientador: Laurence Duarte Colvara / Resumo: Este trabalho apresenta um estudo sobre o controle de Sistema de Energia Elétrica (SEE) com vistas à melhoria da estabilidade transitória por meio da atuação de dispositivos FACTS, neste momento considerando os compensadores em derivação (SVC) e em série (TCSC). Propõe-se a inclusão, em dispositivos pré-existentes, a incorporação de um controle adicional visando atuação em face de transitórios eletromecânicos. A influência dos dispositivos sobre a capacidade de sincronização entre os pares de máquinas, avaliada por meio do fator de efeito é inserida na atuação dinâmica/transitória do sistema. A evolução da trajetória pós-falta do sistema é considerada em relação às fronteiras da chamada Região de Sincronização Positiva (RSP) e simulações foram realizadas usando os sistemas-teste Simétrico de duas áreas e New England para Lei de Controle proposta e conclui-se que esta é efetiva na melhoria da estabilidade transitória do Sistema de Energia Elétrica e, com aprimoramentos, poderá ser incluída em procedimentos de operação em tempo real. / Abstract: The power system transient stability control is approached by means of FACTS devices, and at this first step the SVC and TCSC devices are considered. A certain device acts upon each pair of machines by means of their synchronization capability which is affected by the corresponding transfer admittance as repeated by the FACTS device. This influence is taken into account by means of a parameter named Effect Factor. The boundaries of a region surrounding the stable equilibrium point named Positive Stability Region are used as reference for critical trajectories and the control action intend to reverse the tendency of the trajectory of leaving this region. In view of the shown tested cases the results are very promising since the proposed control has conduced to improvements in fault critical clearing times and so it has potential to be included in online operation procedures. / Doutor

Dans cet étude, nous nous concentrons sur l'analyse et l'indexation automatique des séquences vidéo. Cela permet une récupération et un accès efficace aux données. Les vidéos étant généralement stockées et transmises sous forme encodées, notre approche se base sur l'analyse dans le domaine compressé. Ce domaine présente un compromis raisonnable entre cout de calcul et qualité des résultats. Les informations les plus pertinentes encodées dans le flux H.264 sont les vecteurs de mouvement (VM). Ces vecteurs sont associés aux macroblocs dans les images prédites (de type B et P). Nous présentons diverses techniques non-supervisés pour déterminer le mouvement de la caméra, détecter et suivre les objets en mouvement dans les vidéos. Ces analyses sont basées sur les champs de VM. Nous démontrons le potentiel de l'analyse dans le domaine compressé avec plusieurs exemples d'applications, notamment la surveillance de trafic routier et la détection de copies. / The amount of generated audiovisual content continues to increase. In this work, we concentrate on the challenge of automatic video analysis and indexing, which builds the basis for efficient information access and retrieval. Taking advantage of the fact that video in most cases is stored and transmitted in encoded form, we pursue the approach of compressed domain processing, which represents a reasonable trade-off between computational complexity and quality of analysis results. The most valuable information encoded in H.264 streams is the motion vectors (MVs) that are associated with macroblocks in temporally predicted frames of type B and P. We present a number of completely unsupervised techniques to determine the camera motion and to detect and track moving objects from the extracted MV fields. We furthermore present the potential of compressed domain processing through several example applications, including traffic surveillance and video copy detection.

<p>The SAAB variable compression engine is a new engine concept that enables the fuel consumption to be radically cut by varying the compression ratio. A challenge with this new engine concept is that the compression ratio has a direct influence on the output torque, which means that a change in compression ratio also leads to a change in the torque. A torque change may be felt as a jerk in the movement of the car, and this is an undesirable effect since the driver has no control over the compression ratio. </p><p>The aim of this master's thesis work is to develop a torque control strategy for the SAAB variable compression engine. Where the main control objective is to make the output torque behave in a desirable way despite the influence of compression ratio changes. </p><p>The controller is developed using a design method called Internal Model Control, which is a straightforward way of both configuring a controller and determining its parameters. The controller has been implemented and evaluated in a real engine, and has proved to be able to reduce the effect of compression ratio disturbance.</p>

<p>Knock is a phenomenon that limits how effciently an engine can operate. Severe knock is harmful to the engine and must therefore be avoided. Controlling the knock intensity is complicated by a phenomenon called cycle to cycle variations. Because of these variations, the knock intensity must be considered a stochastic variable and the control is made on a mean value from a large number of cycles. </p><p>The SVC (Saab Variable Compression) concept adds the compression ratio as an extra degree of freedom. At Vehicular systems, research is done on how to put this additional variable to its best use. </p><p>A controller is developed that control the engine to a desired knock intensity and torque, using the ignition angle and the pedal position. The controller is implemented as two separate controllers in Matlab and Simulink. These are merged together with a Stateflow chart. A confidence interval calculation is implemented for the mean value of the knock intensity. A program is also developed to process a large number of operating points and make measurements in all of them. </p><p>The conclusion is that the basic construction of the controller and the script are fi;lling their functions but that there are some improvements left to be done. The controller is rather slow and the calculations of the confi;dence interval needs further refi;nement.</p>

<p>A method for constructing a highly scalable bit stream for video coding is presented in detail and implemented in a demo application with a GUI in the Windows Vista operating system.</p><p>The video codec uses the Discrete Wavelet Transform in both spatial and temporal directions together with a zerotree quantizer to achieve a highly scalable bit stream in the senses of quality, spatial resolution and frame rate.</p> / <p>I detta arbete presenteras en metod för att skapa en mycket skalbar videoström. Metoden implementeras sedan i sin helhet i programspråken C och C++ med ett grafiskt användargränssnitt på operativsystemet Windows Vista.</p><p>I metoden används den diskreta wavelettransformen i såväl de spatiella dimensionerna som tidsdimensionen tillsammans med en nollträdskvantiserare för att åstakomma en skalbar videoström i avseendena bildkvalitet, skärmupplösning och antal bildrutor per sekund.</p>

A method for constructing a highly scalable bit stream for video coding is presented in detail and implemented in a demo application with a GUI in the Windows Vista operating system. The video codec uses the Discrete Wavelet Transform in both spatial and temporal directions together with a zerotree quantizer to achieve a highly scalable bit stream in the senses of quality, spatial resolution and frame rate. / I detta arbete presenteras en metod för att skapa en mycket skalbar videoström. Metoden implementeras sedan i sin helhet i programspråken C och C++ med ett grafiskt användargränssnitt på operativsystemet Windows Vista. I metoden används den diskreta wavelettransformen i såväl de spatiella dimensionerna som tidsdimensionen tillsammans med en nollträdskvantiserare för att åstakomma en skalbar videoström i avseendena bildkvalitet, skärmupplösning och antal bildrutor per sekund.

The SAAB variable compression engine is a new engine concept that enables the fuel consumption to be radically cut by varying the compression ratio. A challenge with this new engine concept is that the compression ratio has a direct influence on the output torque, which means that a change in compression ratio also leads to a change in the torque. A torque change may be felt as a jerk in the movement of the car, and this is an undesirable effect since the driver has no control over the compression ratio. The aim of this master's thesis work is to develop a torque control strategy for the SAAB variable compression engine. Where the main control objective is to make the output torque behave in a desirable way despite the influence of compression ratio changes. The controller is developed using a design method called Internal Model Control, which is a straightforward way of both configuring a controller and determining its parameters. The controller has been implemented and evaluated in a real engine, and has proved to be able to reduce the effect of compression ratio disturbance.

Knock is a phenomenon that limits how effciently an engine can operate. Severe knock is harmful to the engine and must therefore be avoided. Controlling the knock intensity is complicated by a phenomenon called cycle to cycle variations. Because of these variations, the knock intensity must be considered a stochastic variable and the control is made on a mean value from a large number of cycles. The SVC (Saab Variable Compression) concept adds the compression ratio as an extra degree of freedom. At Vehicular systems, research is done on how to put this additional variable to its best use. A controller is developed that control the engine to a desired knock intensity and torque, using the ignition angle and the pedal position. The controller is implemented as two separate controllers in Matlab and Simulink. These are merged together with a Stateflow chart. A confidence interval calculation is implemented for the mean value of the knock intensity. A program is also developed to process a large number of operating points and make measurements in all of them. The conclusion is that the basic construction of the controller and the script are fi;lling their functions but that there are some improvements left to be done. The controller is rather slow and the calculations of the confi;dence interval needs further refi;nement.