Sökning: "change formula"

Visar resultat 6 - 10 av 42 avhandlingar innehållade orden change formula.

  1. 6. Long-Term Simulation of Coastal Evolution

    Författare :Hoan Le Xuan; Avdelningen för Teknisk vattenresurslära; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; tidal inlet; inlet shoal; sediment transport; spit growth; shoreline change; spit model; inlet model; mathematical model; numerical model; shoreline model;

    Sammanfattning : There is a strong relationship between regional sediment transport and the local processes at tidal inlets and around coastal structures. Many coastal projects require quantitative understanding of these processes and the interactions between them. LÄS MER

  3. 7. Field Measurements and Predictions of River Flow, Sediment Transport and Morphological Changes

    Författare :Qiancheng Xie; Staffan Lundström; James Yang; J. Gunnar I. Hellström; Anders G. Andersson; Nils Ruther; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Alluvial river; Sediment transport; Morphological change; Meandering; Confluence-diffluence; River training; Field measurements; Numerical simulations; Physical model tests; Machine learning; Alluvial flod; Sedimenttransport; Morfologisk förändring; Slingrande; Konfluens-diffluens; Flodträning; Fältmätningar; Numeriska simuleringar; Fysiska modellprov; Maskininlärning; Strömningslära; Fluid Mechanics;

    Sammanfattning : In an alluvial lowland river, sediment is transported in the form of suspended and bed loads. The fluvial process is the macroscopic view and long-term consequence of sediment movement. LÄS MER

  4. 8. Studies on Building Air Leakage -a transient pressurisation method, measurements and modelling

    Författare :Björn Mattsson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; air change rate; Airtightness; CFD-simulations; moisture transport; air leakage; mould growth; cold attics; transient pressurisation;

    Sammanfattning : Airtightness of the building envelope is a key factor for good performance of a building. The main part of this thesis deals with the exploration of a transient pressurisation method for air leakage measurements.In the transient method, an enclosure is pressurised to a desired pressure. The air flow into the enclosure is then stopped. LÄS MER

  5. 9. Tunning Multicolor Light Emission in Lead-free Materials

    Författare :Weidong Cai; Feng Gao; Jiajun Qin; Letian Dou; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Multicolor light emission; Chiral material; Color change under humidity; Lead-free organic and inorganic material; Incorporation of extra emission center; Leadfree double perovskite; Co-doping; Flerfärgad ljusemission; Kiralt material; Färgförändring under fukt; Blyfritt organiskt och oorganiskt material; Inkorporering av extra emissionscenter; Blyfri dubbel perovskit; Samdopning;

    Sammanfattning : Perovskites are a class of compounds with the general formula ABX3 and becoming increasingly attractive recently. Because this kind of material possesses various advantages such as abundant raw materials, easy synthesis, excellent photoelectric properties, and short production process. LÄS MER

  7. 10. "Den andra omvändelsen" : Från svensk mission till afrikanska samfund på Örebromissionens arbetsfält i Centralafrika 1914-1962

    Författare :Göran Janzon; Kajsa Ahlstrand; Torstein Jörgensen; Uppsala universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; mission history; mission and church; three-self policy; missionary methods; Örebro Mission; Swedish Baptist Mission; French Equatorial Africa; Republic of Congo; Central African Republic; John Ongman; John Magnusson; John Hilberth; Yngve Ydreborg; Daniel Bokangue; Jean Keller; Missionary studies; Missionsvetenskap;

    Sammanfattning : The Örebro Mission was founded by John Ongman in 1891. Missionary work in Central Africa began through Ongman’s local church in 1914, at first within other mission societies, but was later continued by the Örebro Mission. From 1921 the Örebro Mission developed its own work in Middle Congo and Oubangui-Chari within French Equatorial Africa. LÄS MER