Search for dissertations about: "spectral domain analysis"

Showing result 1 - 5 of 49 swedish dissertations containing the words spectral domain analysis.

  1. 1. Asymptotic and universal spectral estimates with applications in many-body quantum mechanics and spectral shape optimization

    Author : Simon Larson; Ari Laptev; Stefan Steinerberger; KTH; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Spectral theory; shape optimization; semiclassical asymptotics; spectral inequalities; quantum mechanics; Matematik; Mathematics;

    Abstract : This thesis consists of eight papers primarily concerned with the quantitative study of the spectrum of certain differential operators. The majority of the results split into two categories. READ MORE

  2. 2. On the analysis of soft surfaces, frequency selective surfaces and con­formal antennas

    Author : Silvia Raffaelli; Chalmers University of Technology; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; array; microstrip; antenna; dual-frequency; corrugated surface; multi-layer structure; periodic; horn; finite difference time domain; method of moments; spectral domain analysis; infinite;

    Abstract : .... READ MORE

  3. 3. On the Military Utility of Spectral Design in Signature Management : a Systems Approach

    Author : Kent Andersson; Jouko Vankka; Gunnar Hult; Hans Kariis; Hans Liwång; Harold Lawson; Jari Hartikainen; Försvarshögskolan; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; military utility; survivability; signature management; systems engineering; camouflage; Low Observable Technology; spectral design; multi-spectral; Försvarssystem; Military Technology;

    Abstract : There is an ongoing duel between military sensor development and developments in signature management. The last decade, with warfare characterized by joint expeditionary operations and asymmetry, has favored sensors. READ MORE

  4. 4. Homogenization of elliptic equations in thin cylinders and related qualitative problems

    Author : Iryna Pankratova; Luleå tekniska universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Matematik; Mathematics;

    Abstract : The thesis consists of four closely related papers (A, B, C and D). Paper A concerns the study of the behaviour at infinity of solutions to second order elliptic equation with first order terms stated in a half-cylinder. READ MORE

  5. 5. Some new Friedrichs-type inequalities in domains with microinhomogeneous structure

    Author : Yulia Koroleva; Luleå tekniska universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Mathematics; Matematik;

    Abstract : This Licentiate thesis is devoted to derive and discuss some new Friedrichs-type inequalities for functions, which belong to the Sobolev space $H^1$ in domains with microinhomogeneous structure and which vanish on a part of the boundary. The classical Friedrics inequality holds for functions from the space $\mathop{H^{\smash 1}}\limits^{\circ}$ with a constant depending only on the measure of the domain. READ MORE