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9546 Uppsatser om Distribution system - Sida 2 av 637
Design av system för distribution av larm
Inom styr- och reglerteknik är hantering av larm en viktig fråga, speciellt då fastighetsbranschen mer och mer börjat automatisera driften av fastigheterna. Det finns ett antal system på marknaden som erbjuder larmdistribution via en mängd olika transportsystem. Syftet med projektet är att undersöka om det finns alternativ till dessa som erbjuder mer flexibilitet, samt att designa en prototyp till ett system som använder denna alternativa metod. Två befintliga system analyserades och en kravspecifikation baserad på analysen upprättades. Utifrån denna designades en prototyp som sköter distributionen över Internet och en enkel implementation av en del av designen har gjorts.
Tillförlitlighet i Stockholms elnät : En analys med hjälp av Tekla NIS
Outages in the electric grid can be costly for society. Because of this, reliability is one of the parameters used to regulate network companies. Reliability in electrical grids can be measured with SAIDI, system average interruption duration index, which for Fortum Distribution has increased in Stockholm?s distribution network (11 kV) in the early 2000?s.By using outage data for Stockholm from 2011-2013, sets of parameters to be used for reliability calculations in the network information program Tekla NIS were derived. Two different options for investment were then analysed: changing old cables with high fault frequencies, and installing automatic switching in distribution substations.
Ett varumärkets styrka och dess distribution : en studie genomförd med utgångspunkt från varumärken som säljer en livsstil
Background: A strong brand is becoming an increasingly important factor when surviving on a competitive market. A strong brand can therefore be considered a strategically important resource. The relationship between a brand's strength and its distribution can decide the future of a brand in the long run. Lifestyle branding is becoming a more popular way of differentiating ones brand from the competition. Purpose: The purpose of this thesis is to identify factors which according to the lifestyle brand owners are central when measuring the strength of a brand.
Framtidens driftcentral : En analys av den framtida driften av ett svenskt elna?t
Active work to increase the efficiency of energy use is taking place in Sweden and throughout all of Europe. Electricity is an important part in our society?s energy system which means that the electrical grid operators and associated therewith has a central role in this work. Monitoring and controlling the electrical grids are managed from the Distribution system operator?s DC, dispatch center.The aim of this report is to examine how the operations in a typical DC on the Swedish electricity distribution network will look like in five to ten years.
?Men de används ju inte.? - en undersökning om distributionsstödda böcker från bibliotekariers synpunkt.
The purpose of this study is to investigate librarian?s opinions concerning literature with state supported distribution and how to mediate and market these in the library. The types of mediation and marketing that have been studied are positioning, labeling and oral mediation.The study is qualitative with interviews at seven main public libraries in central Sweden. The respondents of the study were responsible for the literature with state supported distribution within the library.The study is based on a theoretical frame of reference containing theories from Jofrid Karner Smidt, regarding librarian?s mediation in libraries, and François Colbert?s theory on marketing planning for arts and culture.The results of our study showed that librarians have both positive and negative opinions when it comes to the literature with state supported distribution.
Mikroproducenternas påverkan på Elinorr
The Swedish energy system will be influenced by many future changes, such as energy and climate policy objectives. The installation of more renewable electricity could increase by using solar energy. Over the recent years, grid-connected photovoltaic (PV) systems have increased dramatically in Sweden, partly due to various support systems and compensation models. These support systems have been designed to make it easy for individuals and businesses to invest in self-generated electricity and thus contribute to the transformation of the energy system.The introduction of a higher proportion of solar energy may in turn affect the Swedish electricity system. This could mean that the electricity companies will be facing a number of changes in the near future.
Reklamationskostnader vid distribution - en empirisk undersökning
Syftet med uppsatsen är att inventera uppfattningen om reklamationskostnader och deras vikt vid distribution, samt att utreda om det finns parametrar som möjliggör en inrangering av företag i olika grupper baserat på vilka rutiner de har vad gäller deras hantering av kostnadsdrivaren reklamationskostnader vid distribution. Studien är baserad på en förstudie samt en huvudstudie. Huvudstudien består av en empirisk undersökning innehållandes 27 företag. Studien har en deduktiv ansats. Studiens undersökning är av kvalitativ karaktär.
Kalkylering i flygbranschen: En fallstudie av ett flygbolag
The purpose of this thesis is to analyse and propose improvements to the cost accounting system in use at an airline operating on the Swedish market. The choice of study object is based on the airline?s desire to have its cost accounting system evaluated. During the analysis we have identified a number of points where the current cost accounting system does not correspond to its intended purpose. These points include significant groups of costs not being considered in the current system, potential over capacity is not visible and logic connections between distribution keys and the use of resources are sometimes lacking.
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.
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.
En utvärdering av två olika sa?tt att skatta fördelningen till stickprovsmedelvärden från olikfördelade data - normalapproximation kontra resampling
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.
Morgondagens effektiva fjärrvärme : En beskrivande litteraturstudie
This report is made as a literature review, focusing on the work done to increase understanding of efficiency in the categories of substations and secondary heating systems, with respect to the deviation from the theoretically possible cooling off in the distribution network as well as the economic benefit that appear. The main purpose of a considerable part of the literature used in this report addresses the issue of identifying individual causes of reduced cooling in district heating systems. These literature resources have been compiled and summarized as part of the report.The technology of district heating is associated with benefits such as better use of the energy in a fuel. This is the case of cogeneration plants where serial generation of electricity and thermal energy increases efficiency compared with the parallel generation where heat is generated locally and electricity is generated centrally. Serial generation thus allows for lower primary energy demand.
Distribution och försäljning av kvalitetsfuru : en fallstudie
The purpose of this study is to analyse how a distribution and sale-network for quality softwood lumber should be designed to fit sawmilling companies? business concepts, and at the same time satisfy customer needs regarding delivery time and quality aspects. This thesis work is a case study based on a sawmilling and retail company in Sweden.
AB Karl Hedin is a private owned sawmilling company with 500 employees. The company?s turnover is 1500 million SEK, it includes 4 sawmills, 16 builders merchants stores and a packaging company.
Trafikverkets effektstyrningssystem - EFS 132 kV : Bidraget till minskade förluster
The technological legacy from the early electrification of the Swedish railroads has resulted in a power grid with a lower grid frequency than the national power grid from which it is fed. Energy transfer between these power grids with different frequencies requires substations, adapting the grid frequency for the rail road power grid. For this purpose, a feeding power grid has been built, stretching across the country from Boden in the north to Tälle/Häggvik in the south.Power transfer in the Swedish power grid results in voltage angle differences which increase with increasing loads and transfer distance. These voltage angle differences are transferred from the power feeding substations to the rail road power grid, will in some extent cause loss of energy due to unwanted power flows from north to south.To minimize the losses due to this phenomenon, a power management system called EFS 132 kV has been developed and implemented. The system minimizes the unwanted power flows and controls the desired power flow for a good distribution of loads between the power feeding substations.This thesis investigates the extent of the transmission losses avoided due to the EFS 132 kV that coordinates the idling angles to a common reference point.The results indicate that EFS 132 kV affects the power flow, especially between the northern substations through an improved load distribution.
Distribution av ömtåliga varor
I denna uppsats undersöks distribution av ömtåliga varor. Syftet med denna uppsats var att belysa hur handelsträdgårdar förhåller sig till sina tänkbara distributörer. En fallstudie av två handelsträdgårdar har utförts och det insamlade materialet har använts för att söka svar på syftet med uppsatsen. Studien har visat att företagen inte följde någon speciell metod vid valet av distributionskanaler och på grund av varans ömtålighet valdes korta distributionskanaler. Övriga faktorer som påverkade valet av distributionskanaler var företagets kunder, konkurrenter, varans kvalitet, företagets geografiska läge och kunskapen om varan..