Sökning: "fibre laser"

Visar resultat 1 - 5 av 52 avhandlingar innehållade orden fibre laser.

  1. 1. Laser cutting and piercing: Experimental and theoretical investigation

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Jetro Pocorni; Luleå tekniska universitet.; [2017]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Manufacturing Systems Engineering; Produktionsutveckling; Laser cutting; laser piercing; efficiency; fibre laser; CO2 laser; high speed imaging;

    Sammanfattning : This thesis concerns experimental investigations of laser cutting and piercing, with theoretical and practical discussions of the results. The thesis is made up of an introduction to laser cutting and six scientific Papers. LÄS MER

  2. 2. Development and Application of Rotational Coherent Anti-Stokes Raman Spectroscopy and Laser-induced Fluorescence for Combustion Diagnostics

    Detta är en avhandling från Division of Combustion Physics, Department of Physics, Lund University

    Författare :Christian Brackmann; Lund University.; Lunds universitet.; [2004]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Laser-induced Fluorescence; Formaldehyde; Biofuel; Laser technology; Laserteknik; Energy research; Energiforskning; Coherent Anti-Stokes Raman Spectroscopy; Combustion; Laser diagnostics; Fysicumarkivet A:2004:Brackmann;

    Sammanfattning : The thesis concerns the development and application of two laser-based methods for combustion diagnostics: dual broadband rotational coherent anti-Stokes Raman spectroscopy (CARS) and laser-induced fluorescence (LIF). In efforts to increase the usefulness of the CARS technique, the applicability of a method involving a combination of the rotational CARS technique and the closely related vibrational CARS technique was investigated. LÄS MER

  3. 3. Two-phase flows in gas-evolving electrochemical applications

    Detta är en avhandling från Stockholm : Mekanik

    Författare :Ruben Wetind; KTH.; [2001]
    Nyckelord :two-phase flow; electrochemical; gas-evolving; chlorate process; micro-bubbles; two-fluid model; numerical modelling; mixture model; drift-flux model; gas-evolving; electrolysis; current distribution; dispersion; image analysis; laser-sheet; fibre;

    Sammanfattning : .... LÄS MER

  4. 4. Interstitial Laser Thermotherapy of Liver Tumours. Methodology and Application

    Detta är en avhandling från Páll Helgi Möller, M.D., Department of Surgery, University Hospital, S-221 85 Lund, Sweden

    Författare :Páll Helgi Möller; Lund University.; Lunds universitet.; [2004]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Resection; Liver; Neoplasm; Blood flow; Monitoring; Feedback control; Light penetration; Bare fibre; Sapphire probe; Nd:YAG laser; Interstitial thermotherapy; Hyperthermia; Surgery; orthopaedics; traumatology; Kirurgi; ortopedi; traumatologi;

    Sammanfattning : Interstitial laser thermotherapy (ILT) is a method well suited for selective local destruction of malignant tumours. In the present work, a laser thermotherapy system based on feedback temperature control of energy delivery (through computerised feedback system) was developed. LÄS MER

  5. 5. Studies of the fibre direction and local bending stiffness of Norway spruce timber for application on machine strength grading

    Detta är en avhandling från Växjö : Linnaeus University Press

    Författare :Min Hu; Linnéuniversitetet.; [2018]
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; digital image correlation; diving angle; fibre angle; grain angle; indicating property; laser scanning; modulus of elasticity; tracheid effect; Forestry and Wood Technology; Skog och träteknik;

    Sammanfattning : Machine strength grading is a production process in the sawmill industry used to grade sawn timber boards into different strength classes with specific characteristic values of the bending strength, modulus of elasticity (MOE) and density. These properties are called grade determining properties. LÄS MER