Sökning: "hybrid project"

Visar resultat 21 - 25 av 103 avhandlingar innehållade orden hybrid project.

1. 21. Baluns, Hybrids and Power Dividers for Ultra- Wideband Antennas

   Författare :Syed Hasan Raza Zaidi; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Multiport feeding network; baluns; packaging; power divider; Ultra-wideband; Eleven feed; gap waveguide; ring hybrid.;

   Sammanfattning : UWB (ultra wideband), depending on the application requirement, is usually referred to 2:1 bandwidth for radio/wireless applications. Here in this thesis it is also used to denote extremely wideband antenna and components at several octave bandwidth, particularly for high frequency applications, such as the 1 – 10 GHz antenna system needed for the Square Kilometer Array (SKA) radio telescope and the 2 – 14 GHz antenna system for the VLBI2010 (Very Long Base line Interferometer) project. LÄS MER

3. 22. The Passionate Combining Entrepreneurs

   Författare :Carin Nordström; Yvonne von Friedrichs; Olof Wahlberg; Karl Wennberg; Mittuniversitetet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Combining entrepreneurs; hybrid entrepreneurs; self-employment; nascent entrepreneurs; lifestyle entrepreneurs; occasional entrepreneurs; passion; entrepreneurial tenure; entrepreneurial teams; choice; logistic regression;

   Sammanfattning : Entrepreneurs are portrayed as salient drivers of regional development and for a number of years nascent entrepreneurs have been studied in a large number of countries as part of the Global Entrepreneurship Monitor project and the Panel Study of Entrepreneurial Dynamics. Scholars have devoted much effort to investigating factors that determine how individuals engage in entrepreneurial activities, with most of the discussion limited to business start-ups. LÄS MER

4. 23. Institutionella samspel : Om möten mellan en kommersiell och en ideell logik

   Författare :Emilia Kvarnstrom; Lars Strannegård; Linda Wedlin; Josef Pallas; Rolf Solli; Uppsala universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; institutional logics; institutional theory; partnerships; cross-sectoral partnerships; hybrid organization; actor; narrative.; Business Studies; Företagsekonomi;

   Sammanfattning : Institutional logics create order and stability. They organize interaction and prescribe how we should behave towards each other. Such logics have generally been regarded as exclusive, in the sense that an organizational field is always guided by a single institutional logic. LÄS MER

5. 24. EM Design for New Ultra Wide Band Technologies: Eleven Feed Baluns, Bowtie Antennas and Gap Waveguides

   Författare :Syed Hasan Raza Zaidi; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Ultra-wideband; Eleven feed; gap waveguide; baluns; Multiport feeding network; power divider; ring hybrid.; packaging;

   Sammanfattning : UWB (ultra wideband), depending on the application requirement, is usually referred to more than 500 MHz bandwidth for radio/wireless applications. Here in this thesis it is also used to denote extremely wideband antennas and components of several octaves bandwidth, particularly for high frequency applications. LÄS MER

7. 25. An Isolated Integrated Charger for Electric or Plug-in Hybrid Vehicles

   Författare :Saeid Haghbin; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Galvanic Isolation; Grid Synchronization; Vehicle Applications; Integrated Battery Charger;

   Sammanfattning : For electric and hybrid vehicles using grid power to charge the battery, traction circuit components are not normally engaged during the charging time, so there is a possibility to use them in the charger circuit to have an on-board integrated charger.In this Licentiate thesis, an isolated high power integrated charger is proposed, designed and constructed based on a special ac machine with a double set of stator windings called motor/generator. LÄS MER