Sökning: "Model simplification"

Visar resultat 1 - 5 av 63 avhandlingar innehållade orden Model simplification.

1. 1. On Model Simplification in System Identification

   Författare :Bo Wahlberg; Linköpings universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Model simplification; System identification;

   Sammanfattning : This report deals with the connection between system identification and model reduction. We propose an identification algorithm that is based on the least squares identification method and either of the model reduction techniques: Frequency weighted truncated balanced realization or frequency weighted optimal Hankel-norm model reduction. LÄS MER

3. 2. Model Reduction for Control of Stirred Tank Reactor Processes

   Författare :Veronica Olesen; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; QFT; CSTR; sensitivity functions; Model simplification; closed loop;

   Sammanfattning : Models of chemical processes have a tendency of being far too complex for controller design. In many cases these models are also too complex for simulation together with other sub-systems, due to long simulation times and numerical problems. LÄS MER

4. 3. In Search of Strategic Consistency - A Model for Evaluation of how Stategies Support Objectives

   Författare :Mikael Weimarck; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; decision-making; strategizing; process; management; consistency; strategic management; trade-off; consonance; objective; model; strategy;

   Sammanfattning : Developments during recent years have brought a divergence between strategic management theory and practice. While practitioners perceive an undiminished need for identification and implementation of appropriate strategic directions of companies, theorists have stressed the limitations that apply to rational strategic analysis and decision-making. LÄS MER

5. 4. Model Reduction for Linear Time-Varying Systems

   Författare :Henrik Sandberg; Anders Rantzer; Sanjay Lall; Institutionen för reglerteknik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Automation; robotics; control engineering; Performance limitations; Convergence analysis; Frequency-domain analysis; Error bounds; Time-varying systems; Model reduction; Linear systems; Automatiska system; robotteknik; reglerteknik; Model reduction;

   Sammanfattning : The thesis treats model reduction for linear time-varying systems. Time-varying models appear in many fields, including power systems, chemical engineering, aeronautics, and computational science. They can also be used for approximation of time-invariant nonlinear models. Model reduction is a topic that deals with simplification of complex models. LÄS MER

7. 5. Simplicity within Complexity : Understanding dynamics of cellular networks by model reduction

   Författare :Olivia Eriksson; Jesper Tegnér; Arne Elofsson; Yishao Zhou; Stefan Bornholdt; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; model reduction; cellular networks; dynamical modules; delayed piecewise linear; systems biology; Biochemistry; Biokemi; biokemi; Biochemistry;

   Sammanfattning : Cellular networks composed of interactions between genes, proteins and metabolites, determines the behavioural repertoire of the cell. Recent developments in high-throughput experimental techniques and computational methods allow static descriptions of these networks on a genome scale. LÄS MER