Search for dissertations about: "Drift och underhållsteknik"

Showing result 1 - 5 of 77 swedish dissertations containing the words Drift och underhållsteknik.

  2. 1. Mathematical modeling of electromagnetic disturbances in railway system

    University dissertation from Luleå : Luleå tekniska universitet

    Author : Farid Monsefi; Luleå tekniska universitet.; Luleå tekniska universitet.; [2006]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Drift och underhållsteknik; Operation and Maintenance; Industrial Electronics; Industriell elektronik;

    Abstract : By introduction of modern electronics into railway system, new challenges in understanding the electric and electromagnetic behavior of these systems arise. In this thesis, electromagnetic modeling of electric networks above dielectric and perfect electrically conducting surfaces are studied. READ MORE

  4. 2. Two-Level Multi-Objective Genetic Algorithm for Risk-Based Life Cycle Cost Analysis

    University dissertation from Luleå : Luleå University of Technology

    Author : Yamur Al-Douri; Luleå tekniska universitet.; [2019]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Artificial intelligence AI ; Life cycle cost LCC ; Machine learning ML ; Multi-objective genetic algorithm MOGA ; Risk-based life cycle cost LCC ; Tunnel fans; Two-level system.; Drift och underhållsteknik; Operation and Maintenance;

    Abstract : Artificial intelligence (AI) is one of the fields in science and engineering and encompasses a wide variety of subfields, ranging from general areas (learning and perception) to specific topics, such as mathematical theorems. AI and, specifically, multi-objective genetic algorithms (MOGAs) for risk-based life cycle cost (LCC) analysis should be performed to estimate the optimal replacement time of tunnel fan systems, with a view towards reducing the ownership cost and the risk cost and increasing company profitability from an economic point of view. READ MORE

  5. 3. Maintenance related losses a study at the Swedish National Rail Administration

    University dissertation from Luleå : Luleå tekniska universitet

    Author : Mattias Holmgren; Luleå tekniska universitet.; [2003]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Kvalitetsteknik; Quality Technology and Management; Drift och underhållsteknik; Operation and Maintenance;

    Abstract : The global competition among companies has lead to higher demands of the production system. Quality has become an important factor for competition. Customer satisfaction depends upon the fulfillment of a number of quality parameters. Two important quality parameters are dependability and safety. READ MORE

  6. 4. Predictive Health Monitoring for Aircraft Systems using Decision Trees and Genetic Evolution

    University dissertation from Luleå University of Technology

    Author : Mike Gerdes; Luleå tekniska universitet.; [2019]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Condition Monitoring; Remaining Useful Life Prediction; Decision Tree; Genetic Algorithm; Fuzzy Decision Tree Evaluation; System Monitoring; Aircraft Health Monitoring; Feature Extraction; Feature Selection; Data Driven; Health Prognostic; Knowledge Based System; Supervised Learning; Data-Driven Predictive Health Monitoring; Health Indicators; Machine Learning; Big Data; Pattern Recognition; Drift och underhållsteknik; Operation and Maintenance;

    Abstract : Reducing unscheduled maintenance is important for aircraft operators. There are significant costs if flights must be delayed or cancelled, for example, if spares are not available and have to be shipped across the world. READ MORE

  7. 5. Maintenance-related incidents and accidents aspects of hazard identification

    University dissertation from Luleå : Luleå tekniska universitet

    Author : Mattias Holmgren; Luleå tekniska universitet.; [2006]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Kvalitetsteknik; Quality Technology and Management; Drift och underhållsteknik; Operation and Maintenance;

    Abstract : The satisfaction of stakeholders depends upon the fulfilment of their requirements. Two important stakeholder requirements related to technical systems are dependability and safety. However, system operation will gradually impair its performance leading to potentially hazardous states of the system. READ MORE