Sökning: "Reliability Testing"

Visar resultat 1 - 5 av 155 avhandlingar innehållade orden Reliability Testing.

  1. 1. On Reliability of SiC Power Devices in Power Electronics

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Diane-Perle Sadik; KTH.; [2017]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Silicon Carbide; Metal-Oxide-Semiconductor Field-Effect Transistor MOSFET ; Junction Field-Effect Transistor JFET ; Bipolar Junction Transistor BJT ; Reliability; Failure Analysis; Reliability Testing; Short- Circuit Currents; Humidity; Resonant converter; Series-resonant converter SLR ; Base drive circuits; Gate drive circuits; Life-Cycle Cost Analysis LCCA ; Kiselkarbid; MOSFETar; JFETar; Bipolär Junction Transistor BJT ; Tillförlitlighet; Robusthet; Felanalys; Tillförlitlighetstestning; Kortslutningsströmmar; Luftfuktighet; Resonansomvandlare; Serie-resonansomvandlare SLR ; Basdrivkretsar; Gate-drivkretsar; Felskydd; Livscykelkostnadsanalys; Electrical Engineering; Elektro- och systemteknik;

    Sammanfattning : Silicon Carbide (SiC) is a wide-bandgap (WBG) semiconductor materialwhich has several advantages such as higher maximum electric field, lowerON-state resistance, higher switching speeds, and higher maximum allowablejunction operation temperature compared to Silicon (Si). In the 1.2 kV - 1. LÄS MER

  2. 2. Track circuits’ robustness Modeling, measurement and simulation

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Emilio Rodriguez; Luleå tekniska universitet.; [2014]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Track circuit; Relay; False positive signals; Signalling in railway; Modelling; Simulation; Testing; Robustness; Interoperability; Reliability; Railway Infrastructure; Technology - Electrical engineering; electronics and photonics; Information technology - Telecommunication; Information technology - Computer engineering; Technology - Engineering physics; Information technology - Systems engineering; Teknikvetenskap - Elektroteknik; elektronik och fotonik; Informationsteknik - Telekommunikation; Informationsteknik - Datorteknik; Teknikvetenskap - Teknisk fysik; Informationsteknik - Systemteknik; Drift och underhållsteknik; Operation and Maintenance;

    Sammanfattning : In countries with rough weather conditions, frequent delays cause railway companies to waste time and money. Many of these delays are related to the train detection systems, as the old DC track circuits are still used in some countries, including Sweden, our case study. LÄS MER

  3. 3. Testing English Collocations : Developing Receptive Tests for Use with Advanced Swedish Learners

    Detta är en avhandling från Språk- och litteraturcentrum, Lunds universitet

    Författare :Henrik Gyllstad; Lund University.; Lunds universitet.; [2007]
    Nyckelord :HUMANIORA; HUMANITIES; foreign languages teaching; Applied linguistics; Språkinlärning; Language learning; vocabulary size; learning level; Swedish advanced learners of English; validity; second language vocabulary acquisition; test development; reliability; collocation; language testing; sociolinguistics; Tillämpad lingvistik; undervisning i främmande språk; sociolingvistik; English language and literature; Engelska språk och litteratur ;

    Sammanfattning : The research reported in this thesis has two main aims. The first aim is to develop tests capable of yielding reliable and valid scores of receptive knowledge of English collocations as a single construct, for use with advanced L2 learners of English. LÄS MER

  4. 4. Estimation of the reliability of systems described by the Daniels Load-Sharing Model

    Detta är en avhandling från Umeå : Umeå universitet

    Författare :Patrik Rydén; Umeå universitet.; [1999]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Non-parametric and parametric estimation; Equal Load-sharing models; asymptotic distribution; martingale; resam-pling; life testing; reliability; MATHEMATICS Applied mathematics Mathematical statistics; MATEMATIK Tillämpad matematik Matematisk statistik;

    Sammanfattning : We consider the problem of estimating the failure stresses of bundles (i.e. the tensile forces that destroy the bundles), constructed of several statisti-cally similar fibres, given a particular kind of censored data. LÄS MER

  5. 5. Supporting complete vehicle reliability forecasts

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Julia Lindén; KTH.; [2017]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Reliability forecast; interactive function; operating conditions; Machine Design; Maskinkonstruktion;

    Sammanfattning : Reliability is one of the properties that customers of heavy trucks value highest.Dependent on all parts and functions of the vehicle, reliability is a complexproperty, which can normally be measured only towards the end of a developmentproject. At earlier development stages, forecasts can give valuable decision supportfor project planning. LÄS MER