Sökning: "Chaotic systems"

Visar resultat 1 - 5 av 41 avhandlingar innehållade orden Chaotic systems.

1. 1. Theory and use of chaotic oscillators in electronic communication systems

   Författare :Anders J Johansson; Institutionen för elektro- och informationsteknik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Chaos; complexity theory; random numbers; Chaotic oscillators;

   Sammanfattning : The theory and applications of chaotic oscillators in electronic commuication are investigated. A method of random number generation utilising a chaotic double scroll oscillator is proposed and evaluated. The theoretical limits of the randomness of the method is analysed.. LÄS MER

3. 2. Explanation and deduction : a defence of deductive chauvinism

   Författare :Henrik Hållsten; Matti Sintonen; Stockholms universitet; []
   Nyckelord :HUMANIORA; HUMANITIES; Deductive explanation; Statistical explanation; Chances; Propensities; Probabilities; Sine qua non; Probabilistic causality; Indeterminism; Ideal explanatory text; Explanatory information; Explanatory sketches; Dynamic systems; Chaotic systems; Approximate solutions; Argument generating procedure. Central figures: Hempel; Coffa; Salmon; Railton; Humphreys; Kitcher; Poincaré; Suppes; Lorenz; Hénon.; Theoretical Philosophy; teoretisk filosofi;

   Sammanfattning : In this essay I defend the notion of deductive explanation mainly against two types of putative counterexamples: those found in genuinely indeterministic systems and those found in complex dynamic systems. Using Railton's notions of explanatory information and ideal explanatory text, deductivism is defended in an indeterministic setting. LÄS MER

4. 3. Error-Correcting Codes Based on Chaotic Dynamical Systems

   Författare :Håkan Andersson; Thomas Mittelholzer; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : This dissertation treats a novel class of error-correcting codes based on chaotic dynamical systems. The codes are defined over a continuous alphabet whereas the information that is to be transmitted belongs to a discrete set of symbols. Simple expressions can be given for the encoders, and the codewords can be described by a parity-check relation. LÄS MER

5. 4. Die Kunst die Zukunft zu erfinden : Selbstrationalität, asymmetrische Information und Selbstorganisation in einer wissensintensiven professionellen Non Profit Organisation

   Författare :Detlef Quast; Per Flensburg; Hans-Erik Nissen; Växjö universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; asymmetric information; complexity theory; evolutionary processes; deterministic chaos; informatics; information theory; librarians; organization theory; self-rationality; self-organization; Informatics; Informatik;

   Sammanfattning : This dissertation focuses on predictability problems regarding the behaviour of the professional librarians in public-, school- and research libraries in specific crucial situations. The material was obtained by observations/participations (over 10 years) in the daily work in Swedish libraries by non-structured interviews and “free” discussions with librarians and library visitors. LÄS MER

7. 5. Get a grip on chaos : Tailored measures for complex systems on surfaces

   Författare :Sascha Firle; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Quantum chemistry; complex systems; chaos; predator prey; movement models; functional response; spatial heterogeneity; topological dynamics; braid template; homoclinic bifurcations; Kvantkemi; Quantum chemistry; Kvantkemi; Quantum Chemistry; kvantkemi;

   Sammanfattning : Complex systems are ubiquitous in physics, biology and mathematics. This thesis is concerned with describing and understanding complex systems. Some new concepts about how large systems can be viewed in a lower dimensional framework are proposed. The systems presented are examples from ecology and chemistry. LÄS MER