Search for dissertations about: "Sets of Uniqueness"

Showing result 1 - 5 of 13 swedish dissertations containing the words Sets of Uniqueness.

  2. 1. Descriptive Set Theory and Applications

    Author : Joao Pedro Paulos; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Sets of Uniqueness; Operator U-sets; Thin Sets; Descriptive Set Theory; ; Operator U0-sets; Point Spectrum; Reflexivity; Fourier Algebra; Jamison sequences; Harmonic Analysis;

    Abstract : The systematic study of Polish spaces within the scope of Descriptive Set Theory furnishes the working mathematician with powerful techniques and illuminating insights. In this thesis, we start with a concise recapitulation of some classical aspects of Descriptive Set Theory which is followed by a succint review of topological groups, measures and some of their associated algebras. READ MORE

  4. 2. Studies of vector tomography

    Author : Kent Stråhlén; Matematik LTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Doppler tomography; Doppler Radon transform; local tomography; vectorial k-plane transform; vectorial Radon transform; k-plane transform; Radon transform; tomography; vector tomography; Mathematics; Matematik;

    Abstract : The motivation to study the kind of problems appearing in this thesis has been ultrasound measurements of flows, from which velocity spectra along lines can be determined. These velocity spectra can mathematically be described by a new non-linear transform, here called the Doppler Spectral Transform (DST). READ MORE

  5. 3. Improving the Efficiency of Public Procurement : Empirical evidence using micro-level contract data

    Author : Ivan Ridderstedt; Hans Lööf; Jan-Eric Nilsson; Kristofer Odolinski; Sofia Lundberg; KTH; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Public procurement; public sector efficiency; auction design; award mechanisms; bundling; transport infrastructure; public transport; Nationalekonomi; Economics;

    Abstract : Among OECD countries, close to one-third of government expenditure is allocated using public procurement. This implies that the skill of public authorities in handling the procurement format has a significant impact on how much the public sector accomplish in relation to their goals and responsibilities. READ MORE

  6. 4. Modelling the Moisture Content of Multi-Ply Paperboard in the Paper Machine Drying Section

    Author : Christelle Gaillemard; Anders Lindquist; ALf Isaksson; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Drying section modelling; multi-ply paperboard; moisture content; identification; grey-box modelling; Optimization; systems theory; Optimeringslära; systemteori;

    Abstract : This thesis presents a grey-box model of the temperature and moisture content for each layer of the multi-ply paperboard inside the drying section of a paper mill. The distribution of the moisture inside the board is an important variable for the board quality, but is unfortunately not measured on-line. READ MORE

  7. 5. Significance of transport dynamics on concentration statistics and expected mass fraction based risk assessment in the subsurface

    Author : Veljko Srzic; Vladimir Cvetkovic; Olaf A. Cirpka; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Local scale dispersion; Heterogeneity structure; Concentration moments; Moment collapse; Expected mass fraction;

    Abstract : This thesis relies on a Langrangian framework used for conservative tracer transport simulations through 2-D heterogeneous porous media. Conducted numerical simulations enable large sets of concentration values in both spatial and temporal domains. READ MORE