Sökning: "failure rate modeling"

Visar resultat 1 - 5 av 29 avhandlingar innehållade orden failure rate modeling.

  1. 1. Individual Failure Rate Modelling and Exploratory Failure Data Analysis for Power System Components

    Författare :Jan Henning Jürgensen; Lars Nordström; Patrik Hilber; Miguel Angel Sanz Bobi; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Asset management; condition monitoring; failure rate; failure rate modeling; Electrical Engineering; Elektro- och systemteknik;

    Sammanfattning : A set of vital societal functions such as health and safety are necessary for today's society to function and to secure the life of its individuals. Infrastructure is required to provide and maintain these functions. LÄS MER

  3. 2. Condition-based Failure Rate Modelling for Individual Components in the Power System

    Författare :Jan Henning Jürgensen; Patrik Hilber; Lars Nordström; Thomas Welte; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Asset management; condition monitoring; diagnostic measures; failure rate; failure rate modeling; transformer diagnostics; Electrical Engineering; Elektro- och systemteknik;

    Sammanfattning : The electrical power grid is one of the most important infrastructures in the modernsociety. It supplies industrial and private customers with electricity and supportsother critical infrastructures such as the water supply. Thus, it is significant that the power grid is a reliable system. LÄS MER

  4. 3. Lifetime modeling and management of transformers

    Författare :Johanna Rosenlind; Rajeev Thottappillill; Zhong Dong Wang; KTH; []
    Nyckelord :transformers; lifetime modeling; asset management; thermal modeling; lifetime estimation;

    Sammanfattning : This work have studied and developed lifetime estimation methods for the power transformer and how these could be used for asset management purposes. It is researchperformed in the intersection of the fields of reliability theory, statistical analysis, and stochastic process theory applied to lifetime estimations and management of transformers. LÄS MER

  5. 4. Application of cohesive modeling in joining technology

    Författare :Saeed Salimi; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; rivet joints; mixed-mode cohesive failure; mixed material; J-integral; Thick adhesive layer;

    Sammanfattning : ABSTRACTThis thesis summarizes the development of cohesive modeling of joints. It presents some new developments regarding the effects of non-zero thickness of adhesive layers and a novel approach of using the concept of cohesive modeling to characterize the failure behavior of rivet joints. LÄS MER

  7. 5. Strategies for assessing health risks from two occupational cohorts within the domain of northern Sweden

    Författare :Ove Björ; Tohr Nilsson; Håkan Jonsson; Lena Damber; Per Gustavsson; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Cohort; mortality; incidence; risk; rate; cancer; cerebrovascular diseases; exposure; occupational; mining; industry; worker; Poisson regression; Cox regression; SMR; causal inference; G-estimation; Occupational and Environmental Medicine; arbets- och miljömedicin; epidemiologi; Epidemiology;

    Sammanfattning : Background: Studies based on a cohort design requires access to both subject-specific and period-specific information. In order to conduct an occupational cohort study, access to exposure information and the possibility and permission to link information on outcomes from other registers are generally necessary. LÄS MER