Sökning: "Quadrature"

Visar resultat 1 - 5 av 112 avhandlingar innehållade ordet Quadrature.

  1. 1. Boundary integral methods for Stokes flow : Quadrature techniques and fast Ewald methods

    Författare :Oana Marin; Anna-Karin Tornberg; Anita Layton; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; boundary integral; Stokes flow; quadrature rule; Ewald decomposition;

    Sammanfattning : Fluid phenomena dominated by viscous effects can, in many cases, be modeled by the Stokes equations. The boundary integral form of the Stokes equations reduces the number of degrees of freedom in a numerical discretization by reformulating the three-dimensional problem to two-dimensional integral equations to be discretized over the boundaries of the domain. LÄS MER

  2. 2. Some properties of one and twophase quadrature domains

    Författare :Mahmoudreza Bazarganzadeh; Henrik Shahgholian; Boris Shapiro; Anzdrej Szulkin; Stockholm University Department of Mathematics; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Quadrature domain; Two- phase problems; Uniqueness; Free boundary problem; Level set method; Shape optimization. 2000 MSC: Primary 35R35; Secondary 35B06; 76D27; 49Q10;

    Sammanfattning : .... LÄS MER

  3. 3. Topics in Potential Theory: Quadrature Domains, Balayage and Harmonic Measure

    Författare :Tomas Sjödin; Björn Gustafsson; Stephen Gardiner; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Mathematical analysis; Quadrature Domain; Balayage; Harmonic measure; Martin boundary; Matematisk analys; Mathematical analysis; Analys;

    Sammanfattning : In this thesis, which consists of five papers (A,B,C,D,E), we are interested in questions related to quadrature domains. Among the problems studied are the possibility of changing the type of measure in a quadrature identity (from complex to real and from real signed to positive), properties of partial balayage, which in a sense can be used to generate quadrature domains, and mother bodies which are closely related to inversion of partial balayage. LÄS MER

  4. 4. Design and Characterization of D-band Monolithic Direct Carrier Modulator and Demodulator Circuits for High Speed Wireless Communication

    Författare :Sona Carpenter; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; modulator; MMIC; Double-Heterojunction Bipolar Transistor DHBT ; demodulator; balun; D-band; InP; Gilbert cell; Quadrature; differential coupler;

    Sammanfattning : Millimeter waves are finding increasing applications in data communication, sensing,imaging and radio astronomy. One application is in high-speed wireless back-haul networksfor mobile communication. The operators are interested in replacing optical fiber withthe more flexible and easy to deploy wireless link. LÄS MER

  5. 5. On the discretization in time and space of parabolic integro-differential equations

    Författare :Nai-Ying Zhang; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; initial-boundary value problem; parabolic; partial; integro-differential equation; regularity; nonsmooth initial data; finite element method; fully discrete; Galerkin approximation; stability; error estimate; quadrature; stability;

    Sammanfattning : .... LÄS MER