Search for dissertations about: "Liu Wei"

Showing result 1 - 5 of 25 swedish dissertations containing the words Liu Wei.

  2. 1. Electro-thermal investigations of4H-SiC RF power MESFETs and4H-SiC power BJTs

    Author : Wei Liu; KTH; []
    Keywords : ;

    Abstract : .... READ MORE

  4. 2. Retinoids and vitamin D in skin and parathyroid glands

    Author : Liu Wei; Uppsala universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Surgery; all-trans retinoic acid 9-cis retinoic acid vitamin A. vitamin D. CRBP. CRABP. RAR. RXR. parathyroid hormone. calcium receptor; Kirurgi; Surgery; Kirurgi; Surgery; kirurgi;

    Abstract : Vitamin D3 (VitD3) and retinoids are important factors involved in differentiation and proliferation in many cell systems. Their effects in skin, where retinoids and vitamin D are known to be crucially involved in keratinocyte differentiation and function,, and in the parathyroid, the overall regulatory organ in calcium homeostasis were studied. READ MORE

  5. 3. Electro-thermal simulations and measurements of silicon carbide power transistors

    Author : Wei Liu; Carl-Mikael Zetterling; Nicholas G. Wright; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electronics; silicon carbide; power device; metal semiconductor field-effect transistor; bipolar junction transistor; electro-thermal simulation; Elektronik; Electronics; Elektronik;

    Abstract : The temperature dependent electrical characteristics of silicon carbide power transistors – 4H-SiC metal semiconductor field-effect transistors (MESFETs) and 4H-SiC bipolar junction transistors (BJTs) have been investigated through simulation and experimental approaches. Junction temperatures and temperature distributions in devices under large power densities have been estimated. READ MORE

  6. 4. Development of microstructure in cast magnesium alloys

    Author : Liu-Ying Wei; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; solidification behaviour; precipitation;

    Abstract : .... READ MORE

  7. 5. Core Acquisition Management in Remanufacturing : Current Status and Modeling Techniques

    Author : Shuoguo Wei; Ou Tang; Erik Sundin; Jan Olhager; Moritz Fleischmann; Linköpings universitet; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Core acquisition; remanufacturing; closed-loop supply chain; quantitative modeling; return uncertainties;

    Abstract : Remanufacturing is an important product recovery option that benefits our sustainable development. Cores, i.e. the used products/parts, are essential resources for remanufacturing. READ MORE