Search for dissertations about: "wave number"

Showing result 11 - 15 of 371 swedish dissertations containing the words wave number.

  2. 11. Computational Solid Wave Propagation Numerical Techniques and Industrial Applications

    Author : Torbjörn Ekevid; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; wave propagation; multigrid; adaptivity; parallel; FEM; iterative; SBFEM;

    Abstract : For wave propagation and many other physical phenomena, the dynamic effects are vital. In industrial applications, such problems are very complex and generally have to be treated by means of numerical methods. READ MORE

  4. 12. Strong blast wave interaction with multiphase media

    Author : Sembian Sundarapandian; Nicholas Apazidis; Konstantinos Kontis; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Blast waves; negative pressure; cavitation; blast wave attenuation; RMI; KHI; Teknisk mekanik; Engineering Mechanics;

    Abstract : The interaction of a blast wave propagating in air with different fluids like water column, aqueous foam and thermal/density inhomogeneity have been studied both experimentally and numerically. The blast waves were generated at atmospheric conditions in a newly constructed exploding wire facility. READ MORE

  5. 13. Geometric Methods for some Nonlinear Wave Equations

    Author : Jonatan Lenells; Matematik (naturvetenskapliga fakulteten); []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Natural science; Geodesic flow; Nonlinear wave equations; Geometric methods; Naturvetenskap;

    Abstract : A number of results related to the geometric interpretation of some dispersive nonlinear wave equations are presented. It is first described how some well-known shallow water equations arise geometrically as Euler equations for the geodesic flow on the Virasoro group endowed with certain right-invariant metrics. READ MORE

  6. 14. Multi-Gigabaud Solutions for Millimeter-wave Communication

    Author : Sining An; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Millimeter-wave communication; power amplifier; mobile network; power combining; outphasing; high order modulation; DQPSK; modem; pilot; 16-QAM; non-linear distortion; E-band; high data rate; carrier recovery;

    Abstract : With the growing number of mobile network and internet services subscriptions, faster communication will provide a better experience for users. In the next generation mobile network, the fifth generation (5G), communication data rate will achieve several Gigabits per second with ultra-low latency. READ MORE

  7. 15. Millimeter-Wave Communications for Indoor Dense Spaces : Channel Modeling and Network Deployment

    Author : Ozan Alp Topal; Cicek Cavdar; Emil Björnson; Ahmed Alkhateeb; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Millimeter wave communication; ray-tracing; channel modeling; access point deployment; convex-concave programming; reconfigurable intelligent surfaces.; Millimetervågsteknik; ray-tracing; kanalmodellering; accesspunktsutbyggnad; konvex-konkav programmering; omkonfigurerbara intelligenta yto; Informations- och kommunikationsteknik; Information and Communication Technology; Telecommunication; Telekommunikation;

    Abstract : In the ever-evolving landscape of wireless communication, the deployment of millimeter-wave (mmWave) technology has emerged as a game-changer for indoor environments. As the demand for high-speed, low-latency connectivity continues to surge, especially in densely populated areas, mmWave access point deployment has gained prominence due to its ability to deliver unprecedented data rates thanks to the available wide bandwidths. READ MORE