Sökning: "Nb"

Visar resultat 1 - 5 av 188 avhandlingar innehållade ordet Nb.

  1. 1. Investigation of hyperfine structure in Nb and Rh

    Författare :Jonas Persson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; double-resonance; Rh; parameterisation; hyperfine structure; laser spectroscopy; radiofrequency spectroscopy; Nb; effective operator;

    Sammanfattning : .... LÄS MER

  3. 2. Structural investigation of Nb-based layer sulfides

    Författare :Alexander Grippa; Sven Lidin; Pedro Berastegui; Carlos Otero Díaz; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Nb-based sulfides; misfit layered; structure determination; electron diffraction; Chemistry; Kemi;

    Sammanfattning : In this work we have investigated the intercalation of electron-donors between NbS2 slabs in Nb-based layer sulfides.Two series of Sr substituted Nb-based misfit sulfides belonging to the 1.5Q/1H and 1Q/1H series of misfit layer compounds have been synthesised. LÄS MER

  4. 3. Titania supported vanadium oxide catalysts in the NH3-SCR reaction: Effect of vanadium loading, promoters and aging

    Författare :Alexander Nellessen; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Nb; aging; Ce; infrared spectroscopy; VOx; NH3-SCR; vanadium oxide;

    Sammanfattning : Emissions of nitrogen oxides (NOx) from combustion processes in mobile sources attract significant attention due to their role as a major source of atmospheric contamination, along with health risks and environmental issues. Since combustion processes in heavy-duty vehicles are expected to be used for a foreseeable future, many efforts have been invested in a suitable deNOx technology. LÄS MER

  5. 4. Me-Si-C (Me= Nb, Ti or Zr) : Nanocomposite and Amorphous Thin Films

    Författare :Olof Tengstrand; Lars Hultman; Per Eklund; Benny André; Linköpings universitet; []
    Nyckelord :;

    Sammanfattning : This thesis investigates thin films of the transition metal carbide systems Ti-Si-C, Nb-Si-C, and Zr-Si-C, deposited at a low substrate temperature (350 °C) with dc magnetron sputtering in an Ar discharge. Both the electrical and mechanical properties of these systems are highly affected by their structure. LÄS MER

  7. 5. Improving the Energy Efficiency of Cellular IoT Device

    Författare :Muhammad Tahir Abbas; Karl-Johan Grinnemo; Johan Eklund; Mohammad Rajiullah; Stefan Alfredsson; Peter Sjödin; Karlstads universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; CIoT; 3GPP; energy saving; mMTC; NB-IoT; LTE-M; EC-GSM- IoT; Computer Science; Datavetenskap;

    Sammanfattning : Cellular Internet of Things (CIoT) has emerged as a promising technology to support applications that generate infrequent data. One requirement on these applications, often battery-powered devices, is low energy consumption to enable extended battery life. LÄS MER