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1011 Uppsatser om Discrete event simulation - Sida 24 av 68
Modellbygge av mekaniksystem och riktmotorer i stridsvagn 122
This master thesis is one part of a project, called ?StabSim?, with the purpose to develop a simulation model for the align and stabilisation system in main battle tank 122. The origin of this project is that it should be possible to make control analysis without risking any hardware. Besides that it will be easy to change components in order to investigate the behaviour of the system. The report includes modelling of tower and weapon mechanics and also the modelling of the synchronous motors, which control these.
Modig som ett lejon och listig som en räv : historieskrivningen kring Monaldescos avrättning sett ur Machiavellis fursteteori
Queen Kristina of Sweden (1626-1689) is a person who has been widely studied during the years. She is known as the monarch who left the Swedish throne and the protestant faith in favour of the catholic Rome. Even though Kristina left her powerful position as queen of Sweden she never gave up her dignity as a sovereign. My purpose with this study is to analyse historians and other scholars different research concerning Kristina?s notorious execution of Monaldesco in 1657.
CFD beräkning på en jetmotorinstallation
Hawk Turbine AB tillverkar mindre jetmotorer som ofta används i små obemannade och radiostyrda flygplan. I flygplansmodellen Lockheed T-33 Shooting Star är motorn monterad inuti planet varför luften måste ledas ut till atmosfären. För bästa möjliga prestanda måste ejektorn och utblåsröret som leder luften dimensioneras efter motor och flyghastighet.En 3-dimensionell CAD modell av flygplanets installation skapades och därefter simulerats i en virtuell vindtunnel med hjälp av datorprogrammet SolidWorks Flow Simulation. Flera olika utblåsrör i varierande storlekar samt olika former har testats för att avgöra om ändringar kan förbättra prestandan ytterligare.Simulationsresultat visar att det går att förbättra nuvarande konfiguration med 5,99 % om diametern på utblåsröret minskas från 75 mm till 70 mm med en bibehållen form på utblåsröret..
Frosttolerans hos douglasgran av olika ursprung och tillväxttyp
This report evaluates whether normal approximation or resampling is to prefer for estimating the distribution of the sample mean and functions of the sample mean. The evaluation relies on simulation studies. The observations of the sample are allowed to be differently distributed. In the case of sample means they are also allowed to be dependent.For sample means the two approximations behaves very similar. The most important component whether we have a good or a bad approximation is how good the approximations catch the variance of the true distribution.
Kvalitetsförbättringar och Emballageinstruktioner
This report is the result of a thesis carried out at the Department of Innovation, Design and Technology (IDT), at Mälardalen University on behalf of ABB AB Machines.The year was 1988 when ASEA and Brown Boveri formed a joint venture under the name ABB (Asea Brown Boveri).We perform our thesis at the division Discrete Automation and Motion where they primarily develops, manufactures and sells synchronous and asynchronous AC motors and generators.The main purpose of this thesis was initially to write a general packaging instruction, but the priority changed to develop more specific packaging instructions for Rotors, Stator gables, Bearing support and Outer Cover (plates) instead.The work started off to deal with a problem about that the staff had to start its work to grind away rust on the stator gables due to those stored outdoors. The result was mainly an investment in a new gable rack so that the material can be stored inside, as well as a packing instruction as it was originally intended.The problem on the bearing supports were that the staff thought it was demanding and difficult to clean them from the rustproofing they were greased in. If it is not possible to remove all rust protection it can cause the paint to not attach properly. After having compared with similar articles a test were done to order a pair of bearing supports without corrosion inhibitor, which gave good results. This initiative also set in motion a process to do the same for more different items.For special pallet, a survey were made of the process with two different VSM and a calculation of how much ABB would earn at ordering more special pallets than getting the material delivered on the A-pallets.
Effektutveckling i den koncentriska fasen i bänkpress och knäböj
Aim: The aim of the study was to investigate 1RM and what power could be generated in bench-press and half squat concentric at certain percentages of 1RM. Special interest was put to evaluate men (M) and women (K), strength trained (ST) verses non strength trained (EST) in generating absolute power as well as power relative to 1RM.Method: In total 59 subjects mean (± SD) age 24.9 ± 4.1 years divided into four test groups: 20 male non strength trained GIH-students (EST M), 20 female non strength trained GIH-students (EST K), 10 male strength trained - sprinters on national/regional level (ST M), 10 female strength trained - sprinters (ST K) on national/regional level. They did two tests on 1RM and power in events of concentric bench-press and half squat in a Smith machine. In the first test session 3 ? 5 lifts were made to measure 1RM in each event.
En jämförelse mellan två datorprogram för utbytesberäkningar :
This thesis is made on behalf of SCA's Forestry Division and is a comparison of two bucking simulation tools: Aptan (manufactured by Skogforsk) and Best/upr (from Berget Systemdesign). The data is based on 32 stands from SCA's forests in Norrbotten and Västerbotten. The objective is to compare the simulations created by the tools with the harvested volumes from those stands. Three variables are needed for the bucking simulation; these are the diameter distribution (at breast height), the relationship function between diameter and height, and the taper coefficients. The volumes of five different assortments from the stands are compared.
Design av slutsteg med digital PWM-teknik för gitarr
Softube has developed DSP-card and software for simulation of the sound of old tube amplifiers. The purpose with this thesis is to design a compact amplifier with high power to function together with the DSP-card and build a unit that can replace several other guitar amplifiers. The advantages with that kind of solution could be that it would be cheaper, easier to carry and easier to stor than the real amplifiers. The amplifier that has been designed is of class D type with digital PWM modulator. There is several types of amplifier modules on the market that use analog input signal, but if one of them would be used a D-A converter is needed on the DSP card.
Statistisk analys av barnpsykiatrisk symptomatologi som ökar risken för senare personlighetsstörning
This report evaluates whether normal approximation or resampling is to prefer for estimating the distribution of the sample mean and functions of the sample mean. The evaluation relies on simulation studies. The observations of the sample are allowed to be differently distributed. In the case of sample means they are also allowed to be dependent.For sample means the two approximations behaves very similar. The most important component whether we have a good or a bad approximation is how good the approximations catch the variance of the true distribution.
Oljeprisets påverkan på aktiekurserna i internationella och svenska oljebolag
Uppsatsen studerar hur aktiekurser i oljerelaterade bolag har reagerat vid kraftiga svängningar av oljepriset och undersöker hur oljepriset och aktiekurserna följer varandra under en längre period. Uppsatsen använder sig av en event studie samt ett korrelationstest som metod. Det ingår totalt 8 bolag i studien som undersöks mot Brent råolja. Studien visar att företagen reagerar vid en kraftig rörelse i oljepriset samt att det finns en stark korrelation mellan oljepriset och aktiekurserna i majoriteten av företagen..
Har storleken någon betydelse? : En studie av den svenska aktiemarknadens reaktion på varsel om uppsägning av personal
Background: The reasons why this study is conducted is because of the latest recession in the global economy. The current recession has made a lot of companies more aware of its cost, and in order to fit the new harsher economic climate the companies has to be more cost efficient. In order to do so many companies choose to reduce their amount of employees. When this happens in a recession, most of the layoffs are an effect of reactive causes, such as lower incoming orders, and fewer customers. This leads to a problem for the companies that don?t know how these kinds of layoffs will affect the value of the company?s stock.
VD-byten : Hur påverkas ett företags aktiekurs vid ett tillkännagivande av en ny VD?
This essay which is an event study aims to examine if an announcement of a CEO exchange actually is course-affecting information. The essay study?s if a variation can be detected in the share price in relation to an announcement of a CEO exchange. The study also aims to examine if the characteristics; age, number of years at the post, and compensation to the CEO effects the share price progress. The study embraces 46 companies from eight different line of business.
Publika nätverk : Säkerhet och attityd på offentliga platser
Den här uppsatsen är en kvalitativ analys om hur Stockholm stad har valt att använda sig utav eventkommunikation för att kommunicera ett budskap. Eftersom att event kan användas som strategi inom flera typer utav kommunikationsområden, används här begrepp som kan relatera till flera av dessa områden.För att komma i närmare kontakt med eventet har intervjuer genomförts med projektledaren och kommunikationsansvarig för Kulturnatt Stockholm. Genom textanalys, retorisk analys och innehållsanalys studeras intervjusvaren och en reklamaffisch som utformats för att marknadsföra eventet.Det kan konstateras att det utformade syftet för eventet går hand i hand med det kommunicerande budskapet och att Stockholms stads intressen kan återspeglas i reklamaffischen. .
Simulering av översvämningar i Nedre Dalälven
Mosquitoes are found in extremely large numbers in the lower parts of the River Dalälven. In the year 2000 the mosquito nuisance was especially high, resulting in foundation of the Biological mosquito control project. Since 2001 mosquito larvae are controlled by using a biological pesticide BTI (Bacillus thuringiensis ssp israelensis). The mosquito fauna in the area is dominated by flood water mosquitoes, a group of mosquitoes that are very aggressive and form new generations of mosquitoes during every single flooding event during the summer. To be able to efficiently control the mosquitoes it is essential to know the extension and locality of the flooding.
Tiqr - Erfarenheter fra?n utveckling av en e-handelsplattform
Få saker är så starka som traditioner inom studentlivet och många av dessa skapar samhörighet och glädje. Samtidigt som det är viktigt att värna om dessa är det lika viktigt att tänka kritiskt och gå vidare från metoder som inte bara är förlegade utan också skapar frustration och kan leda till försämrade studieresultat. Tiqr, teamet som har lett utvecklingen, anser att köandet till studentarrangemang är just en sådan föråldrad tradition som det bör göras något åt. Denna rapport ämnar granska en digital och mer modern lösning på detta problem.?Vår vision är att skapa ett distributionssystem online för festbiljetter vid Linköpings universitet som förenklar för såväl studenter som arrangörer.? > TiqrFör att kunna förverkliga visionen kring detta distributionssystem ansåg Tiqr att det viktigaste var att skapa en inbjudande sida där slagorden enkelhet och tillgänglighet skulle genomsyra utvecklingsarbetet.