The thesis deals with three document retrieval Models based on logic: the Boolean Model,the fuzzy Model and the Van Rijsbergen Model.In Chapter 1, the author presents the purpose of the thesis. This is to give the logical foundationof the Models, to describe them and to examine them critically. In Chapter 2, some importantnotions in document retrieval are presented. Chapter 3 is devoted to the Boolean Model, Chapter4 to the fuzzy Model and Chapter 5 to the Van Rijsbergen Model.These three chapters are organized in the same way. First, the logical foundation of the Modelis given.

The purpose with this masters thesis was to Model the scanner in a system for laser bathymetry. The Model was then used to develop a controller for the scanner so a good search pattern was achieved. Two different types of Models have been tested, a physical Model and a Black Box Model of Box Jenkins type. The physical Model has been derived from Lagranges equations. Identification experiments have been used to compute the Black Box Model and to find the unknown parameters in the physical Model.

Evaporation is a part of the chemical recovery department at wood pulping mills. The purpose of evaporation is to remove water from the black liquor, which makes the liquor combustible. The process is very energy demanding, and having a well-functioning Model of the system is of greatest interest. The Model can then be used to study energy consumption and to test different control strategies. Two Models have been developed during the master thesis.

This report describes a synchronous machine Model with magnetic saturation in d-axis, neutralconnection and electrical exciter interface for the transient simulator PSCAD/EMTDC. It hasbeen designed and verified in comparison to the regular machine Model in EMTDC.The performance of the Model is very good when incorporating a linear as well as a saturatedmagnetising inductance. The dynamic deviation is only thousandths to ten thousandths perunit. By using a cubic interpolation of the saturation curve, the Model gives a good representationof the saturation effect. The open source code implementation of the synchronousmachine Model gives the possibility to easily adapt the Model to specific requirements.The derived Model makes it possible to simulate a synchronous machine with its excitationsystems, e.g.

The aim of this master thesis was to create a dynamic Model for the processes in a solid fuel boiler of the moving grate type. Another aim with the Model was to keep it as simple as possible but still able to catch the dynamics of the processes in the bedplate of the boiler. The creation of the Model had its origin from drying and combustion equations used in earlier Modeling work of boilers. The represented Model has been used to simulate different kinds of disturbances in a boiler and different ways to control the boiler. These tests show that controlling a number of parameters in the bed of the boiler is an effective way to keep the grate stable during disturbances.

This master?s thesis describes the development of a Model of the catalystsystem aiming at control by an MPC. A well functioning Model, which is suitable in control purpose, is important while emission legislation become more and more hard to fulfill for the car manufacturers. Much research has been done in the field of physical Modeling of the system, but in this work a linear adaptive time discrete ARX-Model is developed and validated.The systems tendency to change its dynamic during usage implies that the Model must be adaptive. The developed Model proved to be well functioning and shows promising conditions for the MPC design.

This report describes a synchronous machine Model with magnetic saturation in d-axis, neutralconnection and electrical exciter interface for the transient simulator PSCAD/EMTDC. It hasbeen designed and verified in comparison to the regular machine Model in EMTDC.The performance of the Model is very good when incorporating a linear as well as a saturatedmagnetising inductance. The dynamic deviation is only thousandths to ten thousandths perunit. By using a cubic interpolation of the saturation curve, the Model gives a good representationof the saturation effect. The open source code implementation of the synchronousmachine Model gives the possibility to easily adapt the Model to specific requirements.The derived Model makes it possible to simulate a synchronous machine with its excitationsystems, e.g.

The purpose of this thesis was to analyse, Model and finally generate dynamic vehicular motions in a train. The objective with the analysis was to find important motions for a realistic train experience. The motions from the analysis were then weighted against possibilities for generation in a motion platform.A dynamic motion Model was created to Model the selected motions. The Model was implemented in a simulation environment, more specifically MATLAB/Simulink. The simulation environment was used to simulate the Model and to generate outputs to control a motion platform.

This project consists of an adaptation, trial and evaluation of a Model for practicing. Based on prior research I created a Model aiming mainly to raise a musician?s self- awareness around the different parameters a performance consists of. An additional wish was for it to simultaneously assist the musician in monitoring his or her progress. With video recording and self-evaluation as the two main parts I tried the Model by using it over a period of three months.

In this report a Model was constructed in order to determine how a number of covariates influence the gross domestic product, GDP. The covariates were chosen depending on their expected influence on GDP, for example education and life expectancy. The data used in this report are collected from the World Bank. The Model to describe GDP has been calculated using multiple line arregression. In order to reach a reliable final Model the number of covariates has been gradually decreased to eliminate insignificant covariates.

AbstractHudiksvalls coordinating Model - a Model to make cooperation easierCamilla Andersson and Åsa GradinThe purpose of this study was to examine the experience each one of the administrators have of their own new Model in Hudiksvall to make cooperation easier for the three different administrations in Hudiksvalls municipality. The study will focus on the administrators experiences of Hudiksvalls coordinating design. Questions of the study were: How is the influence of the Model on the rules? How is the influence of the Model on expectations and parts? What kind of influence did the Model have on the responsibility distribution? What kind of influence has the Model on the responsibilities at the transfer of costs? To answer the questions of the study we applied a qualitative method, it was made through a standardization interview guide and open questions, with six of the dealing officers who works with the Model. Some of the results wich can be discern are by an economic character, andfor the clients that they won`t be passed around the administrations in the community, they get the right help, quick and safe.Key words: cooperation, coordination..

This report present a working Model for simulation of what happens to colors displayed on screens when they are observed through optical filters. The results of the Model can be used to visually, on one screen, simulate another screen with an applied optical filter. The Model can also produce CIE color difference values for the simulated screen colors. The Model is data driven and requires spectral measurements for at least the screen to be simulated and the physical filters that will be used. The Model is divided into three separate modules or steps where each of the modules can be easily replaced by alternative implementations or solutions.

This master thesis was conducted during the spring of 2014 at Atlas Copco Rock Drills AB in Örebro. The purpose of the thesis was to develop a simulation Model of the rotation system for a hydraulic rock drill. In the future, the Model will be used to investigate the phenomena called ?jerky rotation?. In order to validate the simulation Model a test bench was designed and tests were made.

A multivariate cross-sectional Model is used in this thesis to proxy for expected earnings and to estimate return on equity for 214 companies over the period 2009-2013, using Swedish data. The Model, which has never been tested on Swedish data before, is first confirmed to function as a forecasting Model for expected return. Furthermore, the Model is evaluated through a comparison with two univariate Models based on the assumption that return on equity follows a mean reversion process. Forecast accuracy is calculated as the difference of estimated returns and actual returns. The results show that the univariate Models' forecasts are superior to the multivariate Model's..

This paper describes the development of a simulation Model for the ambulance flow in the Västra Götalands-region of Sweden, and an analysis tool for the output of the simulation Model. The aim of the simulation Model was to be able to evaluate the outcome from changes in the ambulance operations, such as a reorganization of ambulances or an increase in intensity of the ambulance calls. This evaluation is meant to serve as decision support for the strategic planning of the ambulance operations. The analysis tool was developed to visualize the abundant geographical data produced by the simulation Model in a meaningful way. The simulation Model was validated against historical data which showed that the dispatch time for the highest prioritized ambulance calls corresponds well with historical data.