Sökning: "Fractal Clusters"

Visar resultat 1 - 5 av 6 avhandlingar innehållade orden Fractal Clusters.

  1. 1. Laser-Induced Incandescence for Soot Diagnostics: Theoretical Investigation and Experimental Development

    Författare :Jonathan Johnsson; Förbränningsfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; premixed flat flames; fractal soot aggregates; laser-induced incandescence; soot; soot optical properties; soot absorption function; laser diagnostics; Fysicumarkivet A:2012:Johnsson;

    Sammanfattning : Laser-induced incandescence, LII, is a laser-diagnostic technique that can be used to measure the volume fraction and the sizes of soot particles suspended in a gas, such as within a combustion process or in its exhausts. The technique is based on the facts that the time-decay of the radiation from laser-heated soot particles is directly related to the particle size in the probed volume, and that the time-integrated radiation is related to the soot volume fraction. LÄS MER

  2. 2. Biomass to Biofuel : Syngas Cleaning and Biomass Feedstock

    Författare :Ramiar Sadegh-Vaziri; Matthäus Bäbler; Per Alvfors; Lilian de Martin; Longcheng Liu; KTH; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Gas-Solid Reaction; ZnO Sul_dation; Outward Growth; Hollow Particles; Algae Flocculation; PBEs; Fractal Clusters; Restructuring of Clusters; Deposition of Clusters; Primary Particle Aggregation.;

    Sammanfattning : This thesis builds around the idea of a biofuel production process that is comprised of biomass production, biomass gasification, gas cleaning, and fuel production. In this work, we specifically looked into H2S removal as a part of cleaning the producer gas and flocculation of microalgae which is involved in the harvesting of microalgae after biomass production. LÄS MER

  3. 3. Optical characterisation of subwavelength dielectric particles using particle tracking beyond the Stokes-Einstein relation

    Författare :Erik Olsén; Chalmers University of Technology; []
    Nyckelord :NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; NATURAL SCIENCES; off-axis holography; Optical microscopy; size determination; particle tracking; partial slip; lipid vesicles; particle dynamics;

    Sammanfattning : As the importance of nanoparticles continues to increase in both biology and industrial processes, so does the need for accurate and versatile characterisation methods. However, most light-based methods to quantify size and refractive index of individual particles are either limited to snapshot observations, particles larger than the wavelength of light, non-dynamic particle properties, or assuming the hydrodynamic boundary conditions without experimental evaluation. LÄS MER

  4. 4. Cell adhesion proteins in different invasive patterns of colon carcinomas : a morphometric and molecular genetic study

    Författare :Victoria Hahn-Strömberg; Lennart Franzén; Richard Palmqvist; Örebro universitet; []
    Nyckelord :AGRICULTURAL SCIENCES; LANTBRUKSVETENSKAPER; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; colon carcinoma; growth pattern; tight junction; Complexity Index; cell adhesion; E-cadherin; Beta-catenin; Occludin; Claudin.; Medicine; Medicin; Biomedicin; Biomedicine;

    Sammanfattning : Colorectal carcinoma is the second most common type of cancer in both men and women in Sweden. Cancer of the colon and rectum are often considered together and their ten year survival rate is approximately 50 – 60 % depending on sex and location. LÄS MER

  5. 5. Models of Surface Roughness with Applications in Paper Industry

    Författare :Jan-Olof Johansson; Matematisk statistik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Statistik; actuarial mathematics; operations research; programming; Matematik; Statistics; Mathematics; estimation.; Surface roughness; parametric models; operationsanalys; programmering; aktuariematematik; Wood; pulp and paper technology; Pappers- och massateknik;

    Sammanfattning : This thesis comprises general parametric models for surface roughness. The models can be used in several technical and natural applications but are here only applied to the micro-structure of paper. In that application, earlier models are generalized and new models introduced. LÄS MER