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695 Uppsatser om Frequency - Sida 22 av 47

Drivförstärkare : Bredbandig drivförstärkare med hög verkningsgrad

This report present the design and manufacturing of a wide-band driver amplifier placed in radar module for airborne applications. The major goals for the amplifier were a high efficiency and to deliver a predefined output power. To reach the second goal an additional preamplifier had to be constructed. The amplifiers were constructed in three steps: Design and Layout in the software Microwave Office, Mounting components and Verification. The driver amplifier was decided to be a push pull configuration consisting of two parallel transistors biased in class AB.

Utvärdering av grafisk utvecklingsmiljö för programmering av signalprocessor

This work aims to evaluate the possibility of using a graphical programming language to develop software for a digital signal processor. A fixed-point digital signal processor called Blackfin BF-537 is used for this. Instead of using conventional programming languages, like C or assembler, for software development the possibilities to use a graphical environment to fill the same purpose are examined. The development environment primarily used is NI LabVIEW, but also the use of Mathworks Matlab Simulink is investigated. A variety of programs consisting of various signal processing operations and utilities are developed using these development environments.

Krubbitning hos häst på olika strömaterial :

By limiting our horse?s freedom of movement, we restrict their opportunity to forage, which is one of their most important needs. If their need of forage is not fulfilled it can lead to frustration, which might manifest itself in abnormal behaviour, like the oral stereotypies for example crib-biting. It is a held belief that the horse swallows air while crib-biting, which they don?t, and that swallowed air causes colic, and the belief that other horses can copy the behaviour, leads to the use of many methods to prevent the behaviour.

FosterhemsvårdMed fokus på metoder vid utredning av nya familjehem, metoder vid handledning/stöd samt kunskap till blivande familjehem

This is a study of foster homes. The focus is at the methods, used at foster homes evaluations and at guidance/support the foster homes are offered.En questionnaire is made in Skåne, on this theme.Except that, it contains a fairly lot of useful information for families who are interested in becoming foster home.The questionnaire is made among public and private participants who evaluates new foster homes and places children (under 18 years) in Skåne.Because of the low answer Frequency, we can?t generalize the result of the questionnaire. But the result we have obtained indicates that Kälvestens evaluation method is used frequently.In the subject of support/guidance we can?t see any specific methods used.

Adaptiv katalysatormodell för reglering

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.

Sjukdomstillstånd associerade med monocytos hos svenska hundar : en retrospektiv journalstudie

Diseases associated with monocytosis in Swedish dogs - a retrospective study. The purpuse of this retrospective study is to determine which diseases are associated with pronounced monocytosis in Swedish dogs. Records of 153 dogs with monocytosis were evaluated. The most common cause was infectious diseases (49%) of which pyometra was seen in 23% of the cases, cystitis and fever of unknown origin each in 13% and gastroenteritis in 12%. Cortison treatment was the second most common cause with 29%. A sixth of the dogs had non inflammatory diseases such as neoplasia, renal- and heartfailure.

Samuel Klingenstierna: Spel och sannolikhetsteori

In this Master thesis, microwave connections between circuit boards are constructed. The primary Frequency band is the X-band (8-12 GHz). The purpose of the connections is to enable a more simple and cheaper way of mounting the circuit boards inside a container. The connections have been designed and evaluated, using different computer programs. A few prototypes have been built and measured.

Klassifikationsproblemet för reella flexibla divisionsalgebror

In this Master thesis, microwave connections between circuit boards are constructed. The primary Frequency band is the X-band (8-12 GHz). The purpose of the connections is to enable a more simple and cheaper way of mounting the circuit boards inside a container. The connections have been designed and evaluated, using different computer programs. A few prototypes have been built and measured.

Indexering av skönlitteratur ? en konsistensundersökning

The aim of this master thesis was to measure the terminological consistency when indexing fiction. The study included ten participants, five librarians and five patrons who indexed two novels in three steps. Besides calculating the terminological consistency a typified index based on the term Frequency was created.Subject heading list Att indexera skönlitteratur was used as a controlled vocabulary and to calculate the consistency the asymmetrical formula was used.The result showed that the study produced relatively high consistency values compared to other studies. The subject heading list increased the consistency value for all of the participants, for the patrons the increase was substantial. The librarians produced higher consistency values compared to the patrons in almost every step and they had in percentage lower amount of terms used only once..

Optimering av metodiken vid genotypning av stora DNA-material

In this Master thesis, microwave connections between circuit boards are constructed. The primary Frequency band is the X-band (8-12 GHz). The purpose of the connections is to enable a more simple and cheaper way of mounting the circuit boards inside a container. The connections have been designed and evaluated, using different computer programs. A few prototypes have been built and measured.

Mobilitetens möjligheter för bloggen : En studie om mobilt bloggande

In this paper we investigate how the possibility of mobility affects the Frequency of blogposts andthe use of pictures in blogs and the content of the pictures. The purpose of this paper is toinvestigate what bloggers do with the possibility of mobility and how it effects the blog. Here weonly focus on smartphones. We focused our theory on communications and what mobility can offerto communication. To investigaste our subject we chose an combination of a qualitative and aquantitative study.

Filterdesign och hårdvarukonstruktion för FMCW-radar

Den här högskoleavhandlingen beskriver designen av ett IF-filter samt hårdvarukonstruktion av en ny 77 GHz FMCW-radar demonstrator. Syftet med demonstratorn är att illustrera hur kisel germanium-, SiGe, teknologi kan användas istället för den mer vedertagna men dyrare gallium arsenik-, GaAs, teknologin. Den gamla radar-prototypen vilken Acreo AB utvecklat är funktionell men behöver konstrueras om för att bättre kunna utvärdera radarprestandan. I avhandlingen presenteras grundläggande radarteori och ekvationer för att underlätta förståelsen av de olika systemblocken. Rapporten beskriver också systemarkitekturen och hur dess funktionalitet kommer att testas.

Hur tränas hundar inom svenska brukshundklubbar? :

This is a descriptive paper based on a questionnaire- and literature study regarding how dogs are trained, what type and Frequency of injuries that occur as well as how the dogs are best prepared for work. Using the results from the questionnaire, an overview is given on how members of Working dog clubs train their dogs and what kind of injuries that occur most frequently. The average age among the dogs included in the study was only about three years. This could indicate that older dogs are not trained in the same extent as young dogs. The results show that only a third of the dog owners warmed up their dogs before training.

Undersökning av modulationsscheman för existerande bredbandsteknologier

In this thesis some different modulation schemes for xDSL-techniques are compared. The investigated techniques are ADSL, G.lite, ADSL2, HDSL, SHDSL and VDSL. The modulation methods used are DMT, CAP and different versions of PAM. Several broadband techniques also use Trellis Coded Modulation (TCM) to increase the coding gain of the transmission. For each one of the different modulation methods the signal-to-noise ratio is calculated for generating a bit error rate probability of 10-7.

Bootstrapvalidering av konfidensintervall för ett standardiserat mått för att jämföra behandlingsbenägenhet mellan sjukhus

In this Master thesis, microwave connections between circuit boards are constructed. The primary Frequency band is the X-band (8-12 GHz). The purpose of the connections is to enable a more simple and cheaper way of mounting the circuit boards inside a container. The connections have been designed and evaluated, using different computer programs. A few prototypes have been built and measured.

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