Search for dissertations about: "xu"

Showing result 1 - 5 of 148 swedish dissertations containing the word xu.

  2. 1. Diffuse Optical Spectroscopy and Imaging of Turbid Media

    Author : Can Xu; Atomfysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; upconverting nanoparticles; luminescence; fluorescence; inverse problem; diffuse reflection spectroscopy; biomedical optics; photon migration; biomedical imaging; gas spectroscopy; medical diagnostics; tomography; Fysicumarkivet A:2013:Xu;

    Abstract : This thesis deals with optical spectroscopy and imaging of complex and strongly scattering turbid media. Focus is mainly placed on three topics, being i) diffuse optical spectroscopy of choroidal tumors, ii) gas spectroscopy in scattering materials using the GASMAS (gas in scattering media absorption spectroscopy) technique, and iii) luminescence diffuse optical imaging and tomography of tissues. READ MORE

  4. 2. Electronic structure calculations on defects and impurities in semiconductors

    Author : Hongqi Xu; Fasta tillståndets fysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Fysicumarkivet A:1991:Xu;

    Abstract : [abstract missing].... READ MORE

  5. 3. Radiative Properties of Rare Earth Elements - Free and Bound in Crystals

    Author : Huailiang Xu; Atomfysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Laser Spectroscopy; Upconversion; Lifetimes; Atomic and molecular physics; Atom- och molekylärfysik; Laser technology; Laserteknik; Rare earth Elements; Fysicumarkivet A:2004:Xu;

    Abstract : This thesis is devoted to fundamental aspects, and to spectroscopic applications of radiative properties in free atoms and ions, as well as in ions doped into crystals. Using the time-resolved laser-induced fluorescence technique, measurements of radiative lifetimes for rare earth elements have been performed in neutral Pr, Nd, Tm, and in singly ionized Sm, Er, Nd, Tm, Yb, as well as in doubly ionized Tm and Tb ions. READ MORE

  6. 4. Large eddy simulation of dual-fuel combustion under ICE conditions

    Author : Shijie Xu; Strömningsteknik; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Turbulent combustion; transported probability density function; dual-fuel; spray;

    Abstract : The present thesis aims at studying n-heptane/methanol dual-fuel combustion under internal combustion engine conditions and strives to improve the understanding of its ignition, combustion, and pollutant emission mechanisms. Large-eddy simulation (LES) coupled with Eulerian stochastic fields (ESF) approach is employed to simulate single/dual-fuel combustion in a constant-volume vessel to mimic the single/dual-fuel combustion in conventional/dual-fuel premixed engines. READ MORE

  7. 5. Basal lamina genes affected in leiomyomatosis and congenital muscular dystrophy : structure and mutation analyses of the collagen COL4A6 and laminin LAMA2 genes

    Author : Xu Zhang; Karolinska Institutet; Karolinska Institutet; []
    Keywords : ;

    Abstract : Basal laminae (basement membranes) are flexible thin sheets of specialized extracellular matrix separating organ cells from the underlying or surrounding connective tissues. They are found beneath epithelial and endothelial cells amd surrounding different cells, such as muscle fibers and nerves. READ MORE