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999 Uppsatser om Simulation techniques - Sida 33 av 67

Energieffektivisering av fastighet från 1930-talet : Utredning av energianvändningen och energieffektiviseringsåtgärder för Tången 2

Tången 2 is a building situated in Stockholm, Sweden. It´s built in the 1930s and contains both residences and businesses. The property owner, Diligentia AB, wants to lower the energy use in Tången 2. This report consists of an energy audit which clarifies the specific circumstances linked to Tången 2. Collected knowledge is then used, together with the results from the literature study, to decide energy measures to proceed with.

Heinrich Wilhelm Ernst : En stor violinist i skuggan av Paganini

AbstractTobias Wilczkowski: Heinrich Wilhelm Ernst ? A great violinist in the shadow of Paganini. Uppsala universitet: Institutionen för musikvetenskap, uppsats för 60p., 2005.As a boy, Heinrich Wilhelm Ernst adopted Paganini's virtuosic style. He became a popular violinist who later developed his own style. He used the potential of the violin to its extreme and explored new possibilities on the instrument.

En kommunikationsgeting: En kvalitativ studie i hur ett medtech-företag ska använda sig av sociala medier

Today, social media is used mostly by people in their private life. However, companies are more and more tapping into the area of social media. To this date, mostly B2C companies have been successful in their social media strategies. This qualitative thesis aims to investigate how B2B companies can benefit from using social media as a means to communicate and build relations with their customers. The medtech industry has been chosen as the object of study.Through depth interviews with people in the medtech industry and social media experts, data has been collected in order to answer the questions of (1) how ready customers in the medtech industry are to receive information through social media and (2) how companies can build the best possible social media strategy.

Frekvensreglering i det nordiska kraftsystemet

Svenska Kraftnät is (together with the other transmission system operators of the Nordic power system) responsible for keeping balance between the generated and demanded power in the Nordic power system. Spontaneous load variations and system disturbances, however, lead to power imbalance followed by frequency variations. The frequency deviations can be limited to an acceptable level by the spinning reserve, mainly by hydro power control. But there are also other system properties which have a great influence on the frequency and system stability. The frequency and voltage dependence of the loads have a direct influence on the power balance.

Cytokinuttryck vid vaccination med olika vaccinkoncept mot FIP :

Feline infectious peritonitis (FIP) is a feline viral disease with high mortality. There is no cure or any effective vaccine available today. Many questions are yet to be answered about this disease and the immune response in affected cats. The aim of the study is to evaluate two different techniques for the study of cytokine profiles in cats vaccinated with a vaccine concept against FIPV. More information about the immune response in these cats could give valuable information to better understand the pathogenesis of the disease and the development of an effective vaccine.

Nya renings- och uppgraderingstekniker för biogas

Biogas is a renewable energy source that is produced by anaerobic digestion of organic mate-rial. In Sweden, biogas predominately comes from sewage water sludge and landfills or from organic waste of households and industries. Small scale digestion plants at farms are espe-cially expected to contribute to increased biogas production in the future. Biogas can be ob-tained directly in it?s raw form and used as fuel in a combustion chamber.

Hur ökad fukthalt påverkar pannor

This report is a description of a developed educational simulator over rail vehicles and its components. The simulator is a hardware-based prototype over a door system on rail vehi- cles. System specialists and technicians will use the prototype. The Simulator should give the user a technical demonstration on how components work in a door system. The proto- type consists of motor, switch, relay and sensor.

Gestaltningsförslag till ny förskola på Zakrisdal

Due to increasing regulations regarding new diesel vehicles particulate matteremissions the new Scania truck, Scania Euro 6, has been equipped with a particulatefilter. This component effectively stores the particles in the exhaust gas but must becleaned in order to prevent itself from clogging. The filter is cleaned through aprocess named regeneration which is a thermodynamic process in which thetemperature of the filter is raised through fuel supplied to the exhaust gas.The purpose of this thesis is to contribute to the development of improved controlstrategies of the temperature during the regeneration process through thedevelopment of model-based controllers. These controllers are designed in order tohave good performance in stationary as well as automatic regeneration.In order to develop these model-based controllers a model of the system isconstructed. The model is described as a linear thermodynamic grey-box model withflow varying parameters, showing good results in validation.The model provides a simulation environment during the controller design, which isfocused around the development of linear regulators with the exhaust gas mass flowas a scheduling variable whose size determines controllers? mode of operation.

Utveckling av en Multi-Zonsmodell för NOx Bildning i Diesel Motorer

This thesis work is the last part of the Master of Science education inmechanical engineering at KTH, Stockholm.The aim of this project was the development of a Multi-zone modelfor NOxformation in Diesel engines. Because of the stringent emissionlegislations, great effort is made to decrease the fuel consumption and theharmful emissions of internal combustion engines. Computer simulationsplay a decisive role in this context because they substitute the expensiveand time-consuming laboratory tests.The model is based on a multi-zone approach and uses the wellknownExtended Zeldovich Mechanism which gives a relation to calculatethe NO formation rate using the concentration of different gas speciesinvolved in the process.All the most important phenomena involved in the Diesel combustionhave been modelled. A special attention is then paid to the equilibriumconcentration calculation; this is a significant part of the model whichstrongly influences the following steps.A Simulink model has also been developed. This second version isbased on the previous model and it is made especially to allow theconnection with other external softwares, GT-power in this case.

Projekthanteringssystem

This document is a summary of my work to create a project management system for a small firm working with computer graphics. The intention is to manage customers, projects, images and invoices in the easiest possible way. To make the system as flexible as possible a web-interface was chosen which makes it possible to access the system from any computer, making it independent of any particular operating system. The only requirement on the user environment is that the computer must have a connection to the Internet to be able to access the system. The different techniques that have been used to develop the project management system is primarily Ruby on Rails and a MySQL database.

Hanteringsmetoder av reptiler på djursjukhus med hänsyn till stress och skaderisker

It is popular to keep reptiles as pets in Swedish households. The number of households reporting reptile ownership is more than 15 000 (SCB, 2006). This means that a veterinary practice should consider how to take care of reptiles as patients. The aim of this study was to examine literature and studies concerning safe handling and restraint of reptiles as well as the effects of acute and long term stress response and to suggest a simplified plan for handling reptiles in a veterinary practice. The result of literary studies is that common recommendations for safe handling and restraint of reptiles is based on old techniques and experiences from safe handling of wild animals. The main concern is safety for the veterinary nurse and for the reptile. Stress studies indicate that acute stress response is not harmful for the animal i long term. On the other hand studies of the effect of prolonged stress are not conclusive.

Matematisk generering och realtidsrendering av vegetation i Gizmo3D

To render outdoor scenes with lots of vegetation in real time is a big challenge. This problem has important applications in the areas of visualization and simulation. Some progress has been made the last years, but a previously unsolved difficulty has been to combine high rendering quality with abundant variation in scenes. I present a method to mathematically generate and render vegetation in real time, with implementation in the scene graph Gizmo3D. The most important quality of the method is its ability to render scenes with many unique specimens with very low aliasing.

Prestionsmått : En granskning av tio välgörenhetsorganisationers årsredovisningar

Background and problemThe biggest difference between companies and non-profit organizations are their purposes. Companies? purpose is to generate profit to the shareholders. Non-profit organizations do not have any shareholders and their purpose is to offer service to receivers of benefits.There are a lot of non-profit organizations today and the competition for the donations is rough. Non-profit organizations can influence the publics? decision of who to support by creating a financial reporting that appeal to the public.PurposeThe purpose of this essay is to examine how non-profit goals are measured in non-profit organizations and if there are a practice on the subject.MethodologyWe choose a qualitative approach as we wanted to understand the reality by explaining it with words.

Omvårdnad vid blodprovstagning och venpunktion på fåglar

Blood sampling is one of the most important diagnostic tools in veterinary medicine, and this is also true for avian medicine. A properly collected and handled venous sample can be used for serology, biochemistry and electrolyte analysis, as well as for blood smears, packed cell volume and cell differentiation. Caring for sick birds is a challenge for all veterinary staff. Many birds are easily stressed individuals, and to a very ill bird a big increase in stress level can even be fatal. Avian patients who are presented in a veterinary clinic are often in a poor condition, and blood sampling is an invasive procedure that can cause stress to the patient.

Moderna digitala modulationstekniker - en intuitiv demonstration

EN BILD SÄGER MER ÄN TUSEN ORD? Idag finns det gott om studier som behandlar området digital kommunikation. Det är ett omfattande ämne och det har forskats mycket inom det. Det finns massvis med litteratur och vetenskapliga artiklar som beskriver olika digitala kommunikationstekniker. Studeras dessa inses det ganska fort att de håller en hög och komplex nivå.

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