Search for dissertations about: "DOMAIN"

Showing result 16 - 20 of 3537 swedish dissertations containing the word DOMAIN.

  2. 16. On the Frequency Domain Analysis of Nonlinear Systems

    Author : Karin Ståhl; Linköpings universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Frequency domain; Nonlinear systems; Oscillations; Volterra series;

    Abstract : In this report we study how the Volterra series description of nonlinear systems can be applied to some different problems.We study oscillations in nonlinear systems. READ MORE

  4. 17. Hybrid Solvers for the Maxwell Equations in Time-Domain

    Author : Fredrik Edelvik; Per Lötstedt; Jan Hesthaven; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Maxwell s equations; time-domain; finite volume methods; finite element methods; hybrid solver; dispersive materials; thin wires; Beräkningsvetenskap; Scientific Computing;

    Abstract : The most commonly used method for the time-domain Maxwell equations is the Finite-Difference Time-Domain method (FDTD). This is an explicit, second-order accurate method, which is used on a staggered Cartesian grid. The main drawback with the FDTD method is its inability to accurately model curved objects and small geometrical features. READ MORE

  5. 18. Efficient time-domain modelling suitable for optimising thermoacoustic devices

    Author : Stig Kleiven; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; finite-difference; thermoacoustics; time domain; optimisation; equivalent source method; active control;

    Abstract : Thermoacoustic heat pumps use acoustic work to transfer heat from cold to hot temperatures. Such devices benefit from being environmentally friendly, robust and simple. However, in practice these devices have too low efficiency and power compared to their conventional counterparts. READ MORE

  6. 19. New methods for protein structure threading and domain identification

    Author : Mats Lindstam; Biokemi och Strukturbiologi; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; biomatematik; Molecular biophysics; Molekylär biofysik; medicinsk informatik; Bioinformatik; biomathematics biometrics; medical informatics; structure prediction; Bioinformatics; domain identification; Structural bioinformatics; threading;

    Abstract : The availability of three-dimensional structures of proteins has provided enormous insight into the detailed molecular machinery of the living cell. Since the late 1950s and early 1960s, experimental methods for deriving protein structures have contributed more than 30,000 entries to the Protein Data Bank, representing the collected knowledge of protein and other macromolecular structures. READ MORE

  7. 20. Time-domain modelling of high-frequency wheel/rail interaction

    Author : Astrid Pieringer; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; wheel rail interaction; railway noise; roughness; time domain; frictional instability; discrete irregularities; transient contact; non-Hertzian contact;

    Abstract : The interaction between wheel and rail is the predominant source of noise emission from railway operations in a wide range of conventional speeds. On the one hand, this wheel/rail noise concerns rolling noise and impact noise caused by the vertical interaction excited by roughness and discrete irregularities of the wheel/rail running surfaces, respectively. READ MORE