Sökning: "Importance sampling"

Visar resultat 1 - 5 av 254 avhandlingar innehållade orden Importance sampling.

  1. 1. Volatile metabolites from microorganisms in indoor environments : sampling, analysis and identification

    Författare :Anna-Lena Sunesson; Alvin Fox; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Adsorbents; Analysis; Cultivation; Determination; Gas chromatography; Identification; Indicator substances; Indoor air; Mass spectrometry; Metabolites; Microbial volatile organic compounds; Optimization; Sampling; Sick buildings; Thermal desorption; Aspergillus versicolor; Cladosporium cladosporioides; Paecilomyces variotii; Pénicillium commune; Phialophora fastigiata; Streptomyces albidoflavus;

    Sammanfattning : Microorganisms are able to produce a wide variety of volatile organic compounds. This thesis deals with sampling, analysis and identification of such compounds, produced by microorganisms commonly found in buildings. LÄS MER

  3. 2. On large deviations and design of efficient importance sampling algorithms

    Författare :Pierre Nyquist; Henrik Hult; Sandeep Juneja; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Large deviations; Monte Carlo methods; importance sampling;

    Sammanfattning : This thesis consists of four papers, presented in Chapters 2-5, on the topics large deviations and stochastic simulation, particularly importance sampling. The four papers make theoretical contributions to the development of a new approach for analyzing efficiency of importance sampling algorithms by means of large deviation theory, and to the design of efficient algorithms using the subsolution approach developed by Dupuis and Wang (2007). LÄS MER

  4. 3. On Importance Sampling and Dependence Modeling

    Författare :Jens Svensson; Boualem Djehiche; Thomas Mikosch; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Mathematical statistics; Matematisk statistik;

    Sammanfattning : This thesis consists of four papers. In the first paper, Monte Carlo simulation for tail probabilities of heavy-tailed random walks is considered. Importance sampling algorithms are constructed by using mixtures of the original distribution with some other state-dependent distributions. LÄS MER

  5. 4. Contextual activity sampling : a method to develop clinical interprofessional education

    Författare :Hanna Lachmann; Sari Ponzer; Klas Karlgren; Unn-Britt Johansson; Gudrun Edgren; Sophiahemmet Högskola; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES;

    Sammanfattning : Higher health care education in interprofessional settings is evaluated and developed continuously. The aim of clinical interprofessional education is to provide healthcare students opportunities to develop their professional roles, and understanding of other professions, as well as to develop their teamwork and communication skills. LÄS MER

  7. 5. Chloride profiling in marine concrete - methods and tools for sampling

    Författare :Henrik Wall; Avdelningen för Byggnadsmaterial; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; klorider; betong; provtagning; concrete; sampling; chloride;

    Sammanfattning : This project focuses on how to determine the chloride content in concrete structures exposed to marine environment in an accurate way. When analyzing dust from dry drilling in concrete, it is very often a fact that the chloride profiles show extensive variations even if the sampling has been performed within a very concentrated area with the sampling points close to each other. LÄS MER