Sökning: "non-linearity"

Visar resultat 16 - 20 av 74 avhandlingar innehållade ordet non-linearity.

  1. 16. Studies of reursive projection methods for convergence acceleration of steady state Calculations

    Författare :Joakim Möller; KTH; []
    Nyckelord :;

    Sammanfattning : this paper we have defined two classes of projectionmethods. RPM(m) and NPGS(m), where RPM(1) is the classicalscheme due to Shroff \&Keller. Following the ideas in Lustet al., we obtain NPGS(m). LÄS MER

  3. 17. Modelling and Control Methods with Applications to Mechanical Waves

    Författare :Hans Norlander; Bengt Carlsson; Torsten Söderström; Jonas Sjöberg; Uppsala universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; automatic control; pole placement; linearization; vibration control; distributed parameter systems; wave propagation; Automatic Control; Reglerteknik;

    Sammanfattning : Models, modelling and control design play important parts in automatic control. The contributions in this thesis concern topics in all three of these concepts.The poles are of fundamental importance when analyzing the behaviour of a system, and pole placement is an intuitive and natural approach for control design. LÄS MER

  4. 18. Essays on Institutions and Economic Outcomes

    Författare :Daniel Zerfu; Göteborgs universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Africa; agricultural productivity; efficiency; Ethiopia; ethnic nepotism; ethnicity; governance; institutions; investment; land registration; land tenure; nonlinearity; policy reversal; political trust; poverty trap; trust.;

    Sammanfattning : Paper 1 discusses the impact of tenure insecurity on land-related investment and the policy currently in place to promote tenure security. The empirical results, based on the Ethiopian Rural Household Survey panel dataset, show that tenure insecurity has a significant effect in discouraging land-related investments, and that this effect varies with region and type of investment. LÄS MER

  5. 19. Effects of deep excavations in soft clay on the immediate sourroundings-Analysis of the possibility to predict deformations and reactions against the retaining system

    Författare :Anders Kullingsjö; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; MIT-S1; Sheet pile wall; Soil-structure interaction; Strain; Stress; Ground surface settlement; Finite element method; Case history; Shear test; Shear strength; Pore pressure; Analysis; Constitutive models; Plane strain; Elastoplasticity; Laboratory tests; Factor of safety; Stiffness; e-ADP; Earth pressure; Anisotropy; Soft Clay; Deep excavation; Retaining wall; Shear stress; Deformation;

    Sammanfattning : When excavating in an urban environment, the evaluation of the magnitude and distribution of ground movements is an important part of the design process, since excessive movements can damage adjacent buildings and utilities. In order to minimize movement of the surrounding soil, a retaining wall support system is used for deep excavations to provide lateral support. LÄS MER

  7. 20. Dynamic characteristics of automobile exhaust system components

    Författare :Thomas Englund; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Correlation; Exhaust system; Experimental investigation; Finite element model; Flexible joint; Modal analysis; Non-linear; Simplified modelling; Structural dynamics; Updating;

    Sammanfattning : Demands on emission control, and low vibration and noise levels have made the design of automobile exhaust systems a much more complex task over the last few decades. This, combined with increasing competition in the automobile industry, has rendered physical prototype testing impractical as the main support for design decisions. LÄS MER