Sökning: "concentration"

Visar resultat 21 - 25 av 4446 avhandlingar innehållade ordet concentration.

  1. 21. Modelling and measurement of velocity and concentration in fibre-gas suspensions

    Författare :Olof Melander; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; particle transport; fibre suspensions; two-fluid model; particle image velocimetry; fibres; concentration measurement; computational fluid dynamics; multiphase flow;

    Sammanfattning : .... LÄS MER

  3. 22. Particle Measurements Using Fluctuations in the Regular Transmittance of Light Through a Particle Dispersion : Concentration and Particles size - Theory, Measurement Principles and Applications for Pulp and Paper Production

    Författare :Staffan Rydefalk; Lars Mattsson; John Gregory; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Particle concentration; Particle size; Cylindrical particles; Large particles; Cellulose fibres; Wood pulp fibres; Suspensions; Particle length; Particle length distribution; Particle width; Manufacturing engineering; Produktionsteknik;

    Sammanfattning : The regular transmittance of light or similar radiation through a flowing suspension of particles fluctuates because of the random occurrence of particles in the beam.In the work presented here, a theory for this fluctuating behaviour with the emphasison dispersions of mm-length slender cylindrical particles having circular crosssections is given. LÄS MER

  4. 23. The wealth of regions : geographic concentration , entrepreneurship and regional growth

    Författare :Benny Borgman; Pontus Braunerhjelm; Roger Svensson; KTH; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Economics; Nationalekonomi;

    Sammanfattning : This thesis consists of three individual essays and an introductory chapter. The essays contribute to the current vein of empirical literature on economic geography and entrepreneurship. LÄS MER

  5. 24. Significance of transport dynamics on concentration statistics and expected mass fraction based risk assessment in the subsurface

    Författare :Veljko Srzic; Vladimir Cvetkovic; Olaf A. Cirpka; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Local scale dispersion; Heterogeneity structure; Concentration moments; Moment collapse; Expected mass fraction;

    Sammanfattning : This thesis relies on a Langrangian framework used for conservative tracer transport simulations through 2-D heterogeneous porous media. Conducted numerical simulations enable large sets of concentration values in both spatial and temporal domains. LÄS MER

  7. 25. Solar Assisted Pervaporation : A process for the concentration of fruit juices in membrane pouches with solar energy

    Författare :Randi Phinney; Avdelningen för livsmedel och läkemedel; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; pervaporation; solar drying; membrane pouch; juice concentration; fruit preservation; marmalade; tangerine; Vangueria infausta; microbiology; water activity; soluble solids; Brix;

    Sammanfattning : Drying has been used for thousands of years to preserve foods. One of the first methods used was open air sun drying which exposes foods directly to solar radiation and ambient air. This method is still used today around the world but it remains underdeveloped on a small-scale for two main reasons. LÄS MER