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Visar resultat 21 - 25 av 55 avhandlingar som matchar ovanstående sökkriterier.

  1. 21. Least Squares Methods for System Identification of Structured Models

    Författare :Miguel Galrinho; Håkan Hjalmarsson; Lennart Ljung; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : The purpose of system identification is to build mathematical models for dynamical systems from experimental data. With the current increase in complexity of engineering systems, an important challenge is to develop accurate and computationally efficient algorithms. LÄS MER

  3. 22. Identification and Control of Systems Subject to Abrupt Changes

    Författare :Mille Millnert; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Recursive identification; adaptive control; jumping parameters; Markov regime; time varying parameters;

    Sammanfattning : Many different recursive identification methods for time varying systems have been suggested in the literature. An assumption that the variations in the system parameters are slow is common for almost all the methods. LÄS MER

  4. 23. Tracking Information Flows in Interactive and Object-Oriented Programs

    Författare :Willard Thor Rafnsson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; information security; privacy; static analysis; information flow; program analysis; confidentiality; dependency analysis;

    Sammanfattning : This thesis improves the current state of the art on information-flow control of interactive and object-oriented programs, respectively. Given a policy which specifies which information flows are permitted in a program, the objective here is to ensure that only flows satisfying the policy can occur. LÄS MER

  5. 24. Evaporation and Heat-flux Aggregation in Heterogeneous Boreal Landscapes

    Författare :Tony Persson; Sven Halldin; Dimitris Melas; Deliang Chen; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Hydrology; land-surface processes; heterogeneity; surface fluxes; soil-water content; high latitudes; snow; lakes; climate; mesoscale model; NOPEX; WINTEX; Hydrologi; Hydrology; Hydrologi;

    Sammanfattning : The boreal forests represent 8 % of all forested areas on the earth and have a significant role in the control of greenhouse gases and an impact on global climate change. The main objective of this thesis is to increase the understanding of how evaporation and heat-flux processes in the boreal forest zone are affecting the regional and global climate. LÄS MER

  7. 25. Nonlinear optimization approaches to H2-norm based LPV modelling and control

    Författare :Daniel Petersson; Lennart Ljung; Johan Löfberg; Henrik Sandberg; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Automatic control; Reglerteknik;

    Sammanfattning : To be able to analyze certain classes of non-linear systems, it is necessary to try to represent them as linear parameter varying systems or even as linear fractional representations. For linear parameter varying systems and linear fractional representations of systems there exists many advanced analysis methods such as IQC-analysis and μ-analysis. LÄS MER