Search for dissertations about: "Constraint optimization"
Showing result 1 - 5 of 150 swedish dissertations containing the words Constraint optimization.
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1. Techniques for Efficient Constraint Propagation
Abstract : This thesis explores three new techniques for increasing the efficiency of constraint propagation: support for incremental propagation, improved representation of constraints, and abstractions to simplify propagation. Support for incremental propagation is added to a propagator centered propagation system by adding a new intermediate layer of abstraction, advisors, that capture the essential aspects of a variable centered system. READ MORE
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2. Label Cover Reductions for Unconditional Approximation Hardness of Constraint Satisfaction
Abstract : Combinatorial optimization include such tasks as finding the quickest route to work, scheduling jobs to specialists, and placing bus stops so as to minimize commuter times. We consider problems where one is given a collection of constraints with the objective of finding an assignment satisfying as many constraints as possible, also known as Constraint Satisfaction Problems (CSPs). READ MORE
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3. On Some Combinatorial Optimization Problems : Algorithms and Complexity
Abstract : This thesis is about the computational complexity of several classes of combinatorial optimization problems, all related to the constraint satisfaction problems.A constraint language consists of a domain and a set of relations on the domain. For each such language there is a constraint satisfaction problem (CSP). READ MORE
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4. Approximation of topology optimization problems using sizing optimization problems
Abstract : The present work is devoted to approximation techniques for singular extremal problems arising from optimal design problems in structural and fluid mechanics. The thesis consists of an introductory part and four independent papers, which however are united by the common idea of approximation and the related application areas. READ MORE
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5. Shape Optimization for Acoustic Wave Propagation Problems
Abstract : Boundary shape optimization is a technique to search for an optimal shape by modifying the boundary of a device with a pre-specified topology. We consider boundary shape optimization of acoustic horns in loudspeakers and brass wind instruments. READ MORE