Sökning: "descriptor"

Visar resultat 1 - 5 av 61 avhandlingar innehållade ordet descriptor.

  1. 1. Parameter Estimation in Linear Descriptor Systems

    Författare :Markus Gerdin; Linköpings universitet; []
    Nyckelord :differential-algebraic equations; descriptor systems; identification; TECHNOLOGY; TEKNIKVETENSKAP;

    Sammanfattning : Linear descriptor systems form the natural way in which linear models of physical systems are delivered from an object-oriented modeling tool like Modelica. Linear descriptor systems are also known as linear differential-algebraic equations in the continuous-time case. LÄS MER

  3. 2. Some Results On Optimal Control for Nonlinear Descriptor Systems

    Författare :Johan Sjöberg; Torkel Glad; Xiaoming Hu; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Optimal Control; Descriptor Systems; Differential-Algebraic Systems; Controllability Function; Observability Function; Automatic control; Reglerteknik;

    Sammanfattning : I denna avhandling studeras optimal återkopplad styrning av olinjära deskriptorsystem. Ett deskriptorsystem är en matematisk beskrivning som kan innehålla både differentialekvationer och algebraiska ekvationer. LÄS MER

  4. 3. Reactivity of Transition-Metal Compounds from Electronic Structure

    Författare :Aleksandra Vojvodic; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; magnetic edge states; electronic structure; density-functional theory; growth; surface states and resonances; nitrides; density of states; hydrodesulphurisation; sulphides; steam reforming; transition-metal carbides; Bronsted-Evans Polanyi relation; scaling relations; adsorption; descriptor; reactivity; catalysis;

    Sammanfattning : Transition-metal carbides (TMC's), nitrides, and sulfides belong to the class of materials known as transition-metal compounds (TMX's). Besides having intriguing properties, these materials are relevant for, e.g., growth and catalysis. LÄS MER

  5. 4. On Non-Prioritized Multiple Belief Revision

    Författare :Li Zhang; Sven Ove Hansson; John Cantwell; Tor Sandqvist; André Fuhrmann; KTH; []
    Nyckelord :HUMANIORA; HUMANITIES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Non-prioritized multiple revision; Making up one s mind; Choice revision; Descriptor revision; AGM; Believability relation; Multiple believability relation; Belief base; Partial expansion; Multiple contraction; Filosofi; Philosophy; Mathematics; Matematik; Computer Science; Datalogi;

    Sammanfattning : This thesis investigates a sort of non-prioritized multiple revision, the operation of making up one's mind, and its generalization, the operation of choice revision. Making up one's mind about a sentence is a belief change that takes the agent to a belief state in which either the sentence or its negation is believed. LÄS MER

  7. 5. Improving Drug Discovery Decision Making using Machine Learning and Graph Theory in QSAR Modeling

    Författare :Ernst Ahlberg Helgee; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; machine-learning; QSAR; descriptor importance; local and global models; method of manufactured solutions; automated compound optimization; drug design;

    Sammanfattning : During the last decade non-linear machine-learning methods have gained popularity among QSAR modelers. The machine-learning algorithms generate highly accurate models at a cost of increased model complexity where simple interpretations, valid in the entire model domain, are rare. LÄS MER