Sökning: "second best solution"

Visar resultat 21 - 25 av 106 avhandlingar innehållade orden second best solution.

  1. 21. Optimal design solutions of concrete bridges considering environmental impact and investment cost

    Författare :Elisa Khouri Chalouhi; Raid Karoumi; Mario Plos; KTH; []
    Nyckelord :Structural optimization; Automated design; Beam bridges; Environmental impact; Investment cost; Byggvetenskap; Civil and Architectural Engineering;

    Sammanfattning : The most used design approach for civil engineering structures is a trial and error procedure; the designer chooses an initial configuration, tests it and changes it until all safety requirements are met with good material utilization. Such a procedure is time consuming and eventually leads to a feasible solution, while several better ones could be found. LÄS MER

  2. 22. New Insights Regarding the Efficient Design of Photon Upconversion Systems

    Författare :Axel Olesund; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; fluorescence; solar energy conversion; semiconductor nanocrystals; intramolecular TTA; photon upconversion; photochemistry; triplet-triplet annihilation;

    Sammanfattning : The transition from fossil fuels to renewable energy sources is arguably the most important weapon in combating global climate change. Existing solar technologies could be significantly improved using unconventional ways of manipulating the solar spectrum. LÄS MER

  3. 23. Hydrometallurgical recovery of rare earth elements from flourescent lamp waste fractions

    Författare :Cristian Tunsu; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; rare earth elements; recycling; fluorescent lamp waste; solvent extraction; waste treatment; Cyanex 572; leaching; Cyanex 923;

    Sammanfattning : Recovery and reuse of materials is important for a circular economy. In recent years the recovery of critical metals from end-of-life products has received increased attention. Various streams, e.g. LÄS MER

  4. 24. Synthesis and characterization of dendritic architectures

    Författare :Andreas Nyström; Anders Hult; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biochemistry; Biokemi; Chemistry; Kemi;

    Sammanfattning : The goal of this work was to synthesize different dendritic architectures and evaluate the effect from the dendrons on the material properties. The work presented in this licentiate thesis, Synthesis and Characterization of Dendritic Architectures, is divided into major parts. LÄS MER

  5. 25. Water-based Flexographic Printing on Polymer-coated Board

    Författare :Maria Rentzhog; Mark Rutland; Joseph Aspler; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Surface and colloid chemistry; Yt- och kolloidkemi;

    Sammanfattning : This doctoral thesis comprises three studies dealing with water-based flexography on polymer-coated boards, which have been presented in the five papers included at the end of the thesis. The first study (covered in three papers) presents results from characterisation of a matrix of water-based inks with respect to their rheology, surface tension, wetting, and fulltone printing performance on PE-coated board. LÄS MER