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472 Uppsatser om Tunnel boring machine - Sida 7 av 32
Aerodynamisk optimering av vindkraftverks rotorblad med en genetisk algoritm, BEM-teori, och XFOIL
This study presents a methodology that enables the annual average power of a wind turbine to be increased by automatically optimizing it?s airfoil, twist and chord dis- tribution. As a part of the study the software SiteOpt has been developed. This software connects the open source software XFOIL with the blade element momen- tum theory. XFOIL gives lift and drag coefficients which enable the blade element momentum theory to predict the power of a wind turbine at different wind and ro- tational speeds.
Grundvattensänkning till följd av järnvägstunnel genom Hallandsås : miljökonsekvenser relaterade till förändrad kväveomsättning i mark
This thesis was carried out to give some background information to a report of SLU (Swedish University of Agricultural Sciences) for the Swedish National Rail Administration (Banverket). The requested information was to provide basic data for an environmental impact assessment of the construction of the tunnel through Hallandsås. The aim with the thesis work was to discuss and quantify the leaching of nitrate and the emission of nitrous oxide from the soil at the groundwater level established through the tunnel project. The nitrogen related processes that could be affected were described and discussed. The different areas where a decreased groundwater level can cause changes in the nitrogen processes are the wet and moist areas.
Identifiering av synkronmaskinsmodell genom SSFR-test
At the Division of Electricity at Uppsala University there is an experimental rig forhydroelectric generators. The experimental rig?s vital part is a 12-pole synchronousmachine, whose electrical characterizing parameters (resistances, inductances andtime constants) are unknown. The aim of this thesis is to characterize the machine inits current state by perform a Standstill Frequency Response (SSFR) test. From theanalysis of the measurement data, which is a part of the test, a set of basic parametershave been received.
Ledtidsreduktion vid ACG Nyström
A report has been made at a company in Borås at a company called ACG Nyström. Thecompany is today international and is marketing advanced equipment, systems and furthereducation to the manufacturing industry. A part of ACG Nyström?s production is a machinethey call Unimat. ACG Nyström doesn?t just stand for the actual production of the machine,but also for assembling and installation of the machine at the final customer.
Mikrosimulering för analys av Mästergatans förlängning i Enköping
Two of the main approach roads into the city of Enköping are Salavägen and Stockholmsvägen. They are connected to each other through the street Bangårdsgatan in the roundabout Salatullen and crossing Fannakorset, respectively. These crossings are from time to time heavily loaded, which is why the municipality plan for a new street in parallel to Bangårdsgatan. The traffic will then be spread out and is thereby reducing the density. The new street is actually an extension of the existing Mästergatan, a side street to Salavägen, to the east and connecting it to Stockholmsvägen or a street nearby.The purpose of this Master thesis is to show how the new street can be drawn in order to discharge the traffic in the area between the roundabout Salatullen and the crossing Fannakorset.
Effekter på grundvattnet vid ett slutförvar i Laxemar.
I detta arbete behandlas de grundvattenproblem som kan uppstå om ett slutförvar för använt kärnbränsle byggs i Laxemar. Riskerna undersöks dels från ett miljömålsperspektiv, dels från Laxemars lokalbefolknings perspektiv..
Investeringbenägenheten för M2M lösningar i drivmedelsbranschen
Sammanfattning Titel: Investeringsbenägenheten för M2M lösningar i drivmedelsbranschen Författare: Johan Apell och Tom Ohlsson, Blekinge Tekniska Högskola Nivå: Kandidat uppsats Handledare: Anders Hederstierna Nyckelord: Maskin till maskin, Machine to machine, Maskinkommunikation, M2M, Mobilitet, Investeringsbenägenhet, Investeringsbedömning, Standard, Beslut och Beslutsfattande Beskrivning av situationen Idag går endast ett fåtal av de aktiva företagen på M2M marknaden med vinst, och ett antal har gått i konkurs under det senaste året. M2M branschen tycks ha bristande kunskap om potentiella kundsegment och därmed har man svårt att identifiera sina kunders verkliga behov. Drivmedelsbranschen har börjat titta på M2M lösningar och inlett en rad pilotprojekt inom området. Få aktörer har dock fattat beslut om genomgripande satsningar på M2M lösningar. Hur ser drivmedelsbranschen på M2M lösningar och vilka hinder kan identifieras för detta synsätt? Syfte Att öka förståelsen mellan användare och leverantörer på en ännu omogen M2M marknad, genom att studera en specifik bransch.
Investeringbenägenheten för M2M lösningar i drivmedelsbranschen
Sammanfattning
Titel: Investeringsbenägenheten för M2M lösningar i drivmedelsbranschen
Författare: Johan Apell och Tom Ohlsson, Blekinge Tekniska Högskola
Nivå: Kandidat uppsats
Handledare: Anders Hederstierna
Nyckelord: Maskin till maskin, Machine to machine, Maskinkommunikation, M2M,
Mobilitet, Investeringsbenägenhet, Investeringsbedömning, Standard, Beslut och
Beslutsfattande
Beskrivning av situationen
Idag går endast ett fåtal av de aktiva företagen på M2M marknaden med vinst,
och ett antal har gått i konkurs under det senaste året. M2M branschen tycks ha
bristande kunskap om potentiella kundsegment och därmed har man svårt att
identifiera sina kunders verkliga behov. Drivmedelsbranschen har börjat titta
på M2M lösningar och inlett en rad pilotprojekt inom området. Få aktörer har
dock fattat beslut om genomgripande satsningar på M2M lösningar. Hur ser
drivmedelsbranschen på M2M lösningar och vilka hinder kan identifieras för
detta synsätt?
Syfte
Att öka förståelsen mellan användare och leverantörer på en ännu omogen M2M
marknad, genom att studera en specifik bransch.
EasyMill - En kompakt CNC-fräs för träskivor
ThisreportisathesisfortheTechniciansinComputerAidedDesignprogramatHalmstadUniversity.Thegrouphasdevelopedamillingmachinemainlyusedforfiberboards,onbehalfofJohanWretborn..
Automatiskt Nödstopp
In today?s industry it is starting to get more and more interesting with wireless systems and solutions for applications. To be able to reduce the amount of cables drawn to various machines which takes both space and an extra fee for every cable drawn. Some systems might require the user to use a handheld device that is directly connected by a cable which in some machines might be inelegant for the user.The goal with this bachelor thesis is to develop wireless monitoring of the machine operators position that is working with heavy industrial machinery. The thesis started out with researching different techniques for positioning a transmitter indoors, this was done in order to get a better understanding on how to go about.
Cross-Language Information Retrieval: En granskning av tre översättningsmetoder använda i experimentell CLIR-forskning.
The purpose of this paper is to examine the three main translation methods used in experimental Cross-language Information Retrieval CLIR research today, namely translation using either machine-readable dictionaries, machine translation systems or corpus-based methods. Working notes from research groups participating in the Text Retrieval Conference TREC and the Cross-Language Evaluation Forum CLEF between 1997 and 2000 have provided the main source material used to discuss the possible advantages and drawbacks that each method presents. It appears that all three approaches have their pros and cons, and because the different researchers tend to favour their own chosen method, it is not possible to establish a "winner approach" to CLIR translation by studying the working notes alone. One should remember however that the present interest in cross-language-applications of information retrieval has arisen as late as in the 1990s, and thus the research is yet in its early stages. The methods discussed in this paper may well be improved, or perhaps replaced by others in the future..
Varför klarar inte vissa elever som fått godkänt i grundskolan av gymnasiets Matematik A?
The purpose of this essay was to understand why the pupils of upper secondary school are unable to pass the Mathematics A level. As method, I chose interviews, since the personal and various experiences of the informants are very important for the validity of this essay.This study has shown that the students lack motivation and consider Matematics boring. They haven?t been able to fathom the connection between the subject and how it van be used in everyday life. If the pupils? are to pass their Mathematics A level, they need time, further recourses and teachers who are apt and attentive pedagogues.Additionally, the teachers need more knowledge when it comes to methodology and didactic styles..
Utvärdering av tillverkningsmetoder för svarvbommar
On today?s competitive market, it is difficult to achieve profitability trough high prices on manufactured products. Profitability must be obtained through low manufacturing costs, high quality and short lead times. One of the companies on the market is Sandvik Coromant, manufacturer of tools and chips for metal cutting. This master thesis investigates the methods of manufacturing for boring bars at the manufacturing unit GVH4 at Sandvik Coromant in Gimo, Sweden.
Vem styr bostadsbyggandet i Nacka och Södertälje? : Vilka aktörer påverkar slutresultatet?
Who runs the development? A comparative study of the construction of residential buildings in Nacka and Södertälje.The aim of this study is to identify actors involved in the initiation and implementation of residential house construction in two Swedish municipalities. This means who is taking initiative for new residential buildings, who affects the planning process, who finances these new buildings and who builds them. By exploring empiric material from the municipalities of Nacka and Södertälje, the above questions will be answered and by referring to pluralism, growth machine theory and regime theory a link to general theories of political science is made. The results found show that the analysed municipalities have quite different possibilities for acting and that these backgrounds are also important for which actors will take initiative for new residential buildings and which actors will be allowed to state their opinion during the planning process.
De finns ju vissa bra grejer och vissa lite dåligare, tråkigare grejer med läxor : Elevers erfarenhet av läxor på lågstadiet.
The purpose of this study is to examine how some early year pupils define homework, how much homework they get and also how these pupils perceive that they are affected by the homework. The study is qualitative where ten pupils participated in a semi structured interview. The study will show that these pupils are given homework once a week. The homework is mostly math and reading. The study will continue to show that the pupils believe that homework is important for their learning and also that homework often is boring and that it competes with recreational activities such as friends, sports and rest.