Sökning: "effective notch"

Visar resultat 31 - 35 av 6313 avhandlingar innehållade orden effective notch.

  1. 31. Inbreeding, Effective Population Sizes and Genetic Differentiation : A Mathematical Analysis of Structured Populations

    Författare :Fredrik Olsson; Ola Hössjer; Steinar Engen; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; matematisk statistik; Mathematical Statistics;

    Sammanfattning : This thesis consists of four papers on various aspects of inbreeding, effective population sizes and genetic differentiation in structured populations, that is, populations that consist of a number of subpopulations. Three of the papers concern age structured populations, where in the first paper we concentrate on calculating the variance effective population size (NeV) and how NeV depends on the time between measurements and the weighting scheme of age classes. LÄS MER

  3. 32. Effective Sampling Design for Groundwater Transport Models

    Författare :Rune Nordqvist; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Earth sciences; Sampling design; design robustness; D-optimality; groundwater models; parameter estimation; model discrimination; Geovetenskap; Earth sciences; Geovetenskap; Hydrology; hydrologi;

    Sammanfattning : Model reliability is important when groundwater models are used for evaluation of environmental impact and water resource management. Model attributes such as geohydrologic units and parameter values need to be quantified in order to obtain reliable results. LÄS MER

  4. 33. On the identification and utilisation of relevant data for applying cost-effective maintenance

    Författare :Mirka Kans; Växjö universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Maintenance information systyems; Maintenance decisions; Cost-effective maintenance; Information systems integration; Decision support systems; Industrial engineering and economy; Industriell teknik och ekonomi; Terotechnology; Systemekonomi;

    Sammanfattning : With the global and continuously changing environment of today's companies, competitive strategies of cost minimisation and differentiation, and the ability to use the available resources in a cost-effective way have become important. The major focus should be set on the areas of business where the possibilities for strategic advantages and savings are high, whereas maintenance is one area of business that recently has been considered as an activity contributing efficiently to the companies' strategic objectives of profitability and competitiveness. LÄS MER

  5. 34. Modeling cost-effective climate change mitigation strategies

    Författare :Fredrik Hedenus; Chalmers tekniska högskola; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES;

    Sammanfattning : The challenge of reducing anthropogenic emissions of greenhouse gases calls for a wide variety of analyses to make the mitigation effort efficient and achievable. This thesis explores five different issues related to carbon abatement. LÄS MER

  7. 35. Cost-effective maintenance of railway track geometry : a shift from safety limits to maintenance limits

    Författare :Iman Arasteh Khouy; Peter Veit; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Drift och underhållsteknik; Operation and Maintenance Engineering;

    Sammanfattning : Railway infrastructure is a complex system which comprises different subsystems. Long life span is one of the important aspects of this prime mode of transport. However, the useful life of its assets is highly dependent on the maintenance and renewal strategy used during the assets’ life cycle. LÄS MER