Sökning: "State feedback"

Visar resultat 11 - 15 av 279 avhandlingar innehållade orden State feedback.

  1. 11. Sponsors of War : State Support for Rebel Groups in Civil Conflicts

    Författare :Niklas Karlén; Kristine Eck; Desirée Nilsson; Erin Jenne; Uppsala universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; external support; intervention; civil war; state sponsorship; conflict delegation; proxy war; internationalized conflict; negotiations; conflict recurrence; US foreign policy; Nicaragua; Syria; Peace and Conflict Research; Freds- och konfliktforskning;

    Sammanfattning : Many civil wars are illustrative of wider international tensions and connections that transcend state borders. States often intervene to influence the trajectory and outcome of civil conflicts by providing external support to warring parties. LÄS MER

  3. 12. Utilizing Channel State Information in Space-Time Coding : Performance Limits and Transmission Techniques

    Författare :George Jöngren; KTH; []
    Nyckelord :Beamforming; Channel feedback; MIMO; Space-time coding; Wireless Communication;

    Sammanfattning : This thesis deals with performance limits and transmissiontechniques for a wireless communication link where at least thetransmitter is equipped with an antenna array and moreover hasaccess to possibly imperfect channel state information.An antenna array on the transmit side provides the systemwith an extra spatial dimension that can be utilized for codingboth in the spatial as well as the temporal domain. LÄS MER

  4. 13. Global stability and feedback control of boundary layer flows

    Författare :Espen Åkervik; Dan S. Henningson; Luca Brandt; Dwight Barkley; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Stability; Global Stability; Feedback Control; Control; Estimation; Absolute Convective Instabilities; Model Reduction; Fluid mechanics; Strömningsmekanik;

    Sammanfattning : In this thesis the stability of generic boundary layer flows is studied from a global viewpoint using optimization methods. Global eigenmodes of the incompressible linearized Navier-Stokes equations are computed using the Krylov subspace Arnoldi method. LÄS MER

  5. 14. On Observer-Based Control of Nonlinear Systems

    Författare :Anders Robertsson; Institutionen för reglerteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Observers; Output feedback; Separation principle; The Positive Real lemma; Kalman filter; Backstepping; Robotics; Automation; Chained form systems; reglerteknik; robotteknik; Automatiska system; control engineering; Lyapunov stability; Nonlinear systems; State estimation;

    Sammanfattning : Filtering and reconstruction of signals play a fundamental role in modern signal processing, telecommunications, and control theory and are used in numerous applications. The feedback principle is an important concept in control theory. LÄS MER

  7. 15. The brain-pituitary-gonadal axis of the three-spined stickleback, Gasterosteus aculeatus

    Författare :Yi Ta Shao; Bertil Borg; Sylvie Dufou; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; BPG axis; GnRH; lh-β; fsh-β; three-spined stickleback; Gasterosteus aculeatus; homeostasis; feedback; funktionell zoomorfologi; Functional Zoomorphology;

    Sammanfattning : The seasonal reproduction of the three-spined stickleback is stimulated by long day photoperiod. As in other vertebrates, the reproductive system of stickleback is regulated by the brain-pituitary-gonadal (BPG) axis which is largely controlled by feedback effects. Both negative and positive feedback effects on the BPG axis have been found in fish. LÄS MER