Sökning: "Power Module"

Visar resultat 21 - 25 av 75 avhandlingar innehållade orden Power Module.

1. 21. Stiffness and vibration properties of slender tensegrity structures

   Författare :Seif Dalil Safaei; Gunnar Tibert; René Motro; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Tensegrity booms; Tensegrity grids; Tensegrity power lines; Finite element analysis; Genetic algorithm; Flexibility analysis; Form-finding; Pre-stress design; Optimization;

   Sammanfattning : The stiffness and frequency properties of tensegrity structures are functions of the pre-stress, topology, configuration, and axial stiffness of the elements. The tensegrity structures considered are tensegrity booms, tensegrity grids, and tensegrity power lines.A study has been carried out on the pre-stress design. LÄS MER

3. 22. Flip-Chip Interconnect for Millimeter-Wave Packaging Applications

   Författare :Li-Han Hsu; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Underfill; Packaging; V-band; Fabrication; Millimeter-Waves; MMICs; 60 GHz; Multi-Chip Module; Interconnect; Organic laminate; Reliability.; Flip-Chip; Design;

   Sammanfattning : In recent years, with the demands for wireless communication systems increas rapidly, the operating frequency for the portable wireless is moving toward millimeter-waves. Millimeter-wave wireless communication systems require not only suitable functional IC components but also competent package with low cost and good interconnect performance. LÄS MER

4. 23. Superconducting High Speed Passive Interconnects

   Författare :Raihan Rafique; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Rapid Single Flux Quantum RSFQ ; Superconducting Microstrip Line SMSL ; RSFQ Driver.; Interconnect Discontinuities; Multi-Chip-Module MCM ;

   Sammanfattning : Superconducting digital RSFQ technology offers unique digital processing solutions for the telecommunication that allows more than three times increasing capacity of the 3G networks, makes telecommunication receivers reconfigurable and adjustable for different services, and significantly enhances security level of the data transfer over the fibers.Key features of RSFQ technology are high speed, low power and high integration density. LÄS MER

5. 24. Numerical Modelling of Fuel Sprays

   Författare :Christer Bergström; Strömningsteknik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; vibration and acoustic engineering; vacuum technology; hydraulics; Mechanical engineering; Gas turbine.; Temperature fluctuations. Diesel engine; Counter rotating Vortex Pair; CVP; Large Eddy Simulation; Droplet Evaporation; Turbulent flows; LES; Spray; Modelling; Break-up; Maskinteknik; hydraulik; vakuumteknik; vibrationer; akustik; Carbochemistry; petrochemistry; fuels and explosives technology; Petrokemi; bränslen; sprängämnen;

   Sammanfattning : The way the fuel is introduced into the combustion chamber is one of the most important parameters for the power output and the generation of emissions in the combustion of liquid fuels. The interaction beween the turbulent gas flow field and the liquid fuel droplets, the vaporisation of them and the mixing of the gaseous fuel with the ambient air that are vital parameters in the combustion process. LÄS MER

7. 25. Applications of active materials

   Författare :Erik Edqvist; Greger Thornell; Bengt Lundberg; Edwin Jäger; Uppsala universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Energy efficient; microsystem; resonating cantilevers; microactuators; P VDF-TrFE ; surface mounting assembly; multi layers; flexible printed circuit board; conveyer; three legged; Materials science; Teknisk materialvetenskap; materialvetenskap; Materials Science;

   Sammanfattning : Energy efficiency is a vital key component when designing and miniaturizing self sustained microsystems. The smaller the system, the smaller is the possibility to store enough stored energy for a long and continuous operational time. LÄS MER