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1. 1. 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

3. 2. Människor, skjortor och siffror : reducera komplexitet och en order blir till

   Författare :Tina Carlson Ingdahl; Högskolan i Borås; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; accounting; accounting in practice; business meetings; actor-network theory; framing; calculation; qualculation; calqulation; performativity; complexity reduction; Företagsekonomi; Handel och IT; Bussiness and IT; accounting; accounting in practice; business meetings; actor-network theory; framing; calculation; qualculation; calqulation; performativity; complexity reduction;

   Sammanfattning : More than 35 years ago, calls were made for research on the constitutive role of accounting. Since then, many statements have been made to specify what accounting is or is not. LÄS MER

4. 3. Model Order Reduction Based on Semidefinite Programming

   Författare :Aivar Sootla; Institutionen för reglerteknik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; model reduction; parameterized model reduction; nu-gap metric; semidefinite programming; frequency response matching.;

   Sammanfattning : The main topic of this PhD thesis is complexity reduction of linear time-invariant models. The complexity in such systems is measured by the number of differential equations forming the dynamical system. This number is called the order of the system. LÄS MER

5. 4. Model Reduction Using Semidefinite Programming

   Författare :Aivar Sootla; Institutionen för reglerteknik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; semidefinite programming; model reduction; convex optimization;

   Sammanfattning : In this thesis model reduction methods for linear time invariant systems are investigated. The reduced models are computed using semidefinite programming. Two ways of imposing the stability constraint are considered. However, both approaches add a positivity constraint to the program. LÄS MER

7. 5. Structural and evolutionary aspects of stochastic processes

   Författare :Olof Görnerup; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Proto-cells.; Emergence; Self-organization; Coarse graining; Model reduction; Hierarchical dynamics; Pre-biotic evolution; Complexity;

   Sammanfattning : Stochastic processes constitute a broad class of objects of central importance in complex systems. The main structural aspect of stochastic processes that is treated in this thesis is their hierarchical dynamics. LÄS MER