Sökning: "Mixture model"

Visar resultat 11 - 15 av 459 avhandlingar innehållade orden Mixture model.

  1. 11. Dependence Structures in Stable Mixture Models with an Application to Extreme Precipitation

    Författare :Anna Rudvik; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; multivariate extreme value theory; mixture model; stable variable; dependence measure; mixture model;

    Sammanfattning : In this thesis we study a class of mixture models obtained by mixing extreme value distributions over a positive stable distribution. This depicts a group structure, where the stable distribution is a group specific quantity and a function of the surroundings. The stable mixture models possess a number of interesting characteristics. LÄS MER

  3. 12. Model-Based Optimization of Combustion-Engine Control

    Författare :Gabriel Turesson; Institutionen för reglerteknik; []
    Nyckelord :Model Predictive Control MPC ; Partially Premixed Combustion; Pressure Sensor Feedback; Model Based Control; Particle Filter; Multiple Fuel Injections; Gasoline Compression Ignition; Model Predictive Control MPC ; Partially Premixed Combustion PPC ; Low Temperature Combustion; Model Based Control; Multiple Fuel Injections; Pressure Sensor Feedback; Particle Filter; Gasoline Compression Ignition;

    Sammanfattning : The work presented in this thesis is motivated by the need to reliably operate a compression-ignition engine in a partially premixed combustion (PPC) mode. Partially premixed combustion is a low temperature combustion concept, where the ignition delay is prolonged to enhance fuel-air mixing in the combustion chamber before the start of combustion. LÄS MER

  4. 13. CFD MODELLING AND EXPERIMENTS ON AERATOR FLOW IN CHUTE SPILLWAYS

    Författare :Penghua Teng; James Yang; Anders Wörman; Anton Schleiss; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Spillway Aerator; Cavitation; Air Entrainment; Two-phase Flow; VOF; Mixture Model; Two-Fluid Model; Air Cavity; Cavity Air Pressure; Air Concentration; Shadowgraphic Image Method SIM ; High-speed Particle Image Velocimetry HSPIV ; Bubble Tracking Method BTM ; luftningsramp; kavitation; luftinträngning; tvåfasflöde; VOF; Mixture Model; Two-Fluid Model; luftkavitet; kavitetslufttryck; luftkoncentration; skuggrafisk bildmetod; hastighetsmätning med höghastighetspartikelfotografering; bubbelspårningsmetod; Byggvetenskap; Civil and Architectural Engineering;

    Sammanfattning : A chute spillway is a typical component of large dams for discharging floods. Because of the high water head, the flow velocity in the chute is often in excess of 20 m/s. Consequently, the structure is usually prone to cavitation damages. Flow aeration is evidenced to efficiently eliminate or to mitigate the damages. LÄS MER

  5. 14. Powder mechanics and dispersion properties of adhesive mixtures for dry powder inhalers : Conceptualized as a blend state model

    Författare :Jonas Rudén; Göran Alderborn; Göran Frenning; Tobias Bramer; Kyrre Thalberg; Regina Scherliess; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Inhalation; Dry Powder Inhaler; adhesive mixture; aerosols; powder mechanics; dispersibility; aerosolization; Farmaceutisk vetenskap; Pharmaceutical Science;

    Sammanfattning : Inhaled medicines is a therapy that dates back several thousands of years. Nowadays, using various types of inhaler devices to deliver active pharmaceutical ingredients (APIs) to treat respiratory diseases has become common practice. LÄS MER

  7. 15. Investigating the parameters that influence the behaviour of natural iron ores during the iron production process

    Författare :Abraham Judah Bumalirivu Muwanguzi; Andrey V Karasev; Henrik Saxèn; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; natural iron ore; iron production; characterization; physical and metallurgical properties; sinter; pellet; direct reduction; low temperature degradation; sample weight; sample positioning; microstructure; reduction degree; solid conversion; Volumetric Model; Grain Model; Random Pore Model; Muko; Uganda;

    Sammanfattning : In the iron production processes, sinters and pellets are mostly used as raw materials due to their consistency with respect to physical and chemical properties. However, natural iron ores, as mined, are rarely used directly as a feed material for iron processing. LÄS MER