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    Wyświetlanie 1-3 z 3
    Tytuł:
    Microstructural and tomographic analyses in geotechnical assessment of soil media
    Autorzy:
    Kumor, M. K
    Powiązania:
    https://bibliotekanauki.pl/articles/178954.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    clay soils
    organics soil composition
    microstructure
    computed tomography
    Opis:
    This paper discusses two different approaches to microanalysis of the soil medium. It presents testing results collected by electromicroscopy, which requires special sample preparation, and a non-destructive method, requiring no sample preparation and using a computer-assisted tomograph. The paper presents: • Applicability of microstructure analyses and chemical microanalysis in the determination of structural damage incurred in the historical time in relation to the effect of contemporary abiotic events; • Application of a standard medical computer-assisted tomograph in qualitative assessment of structure and observations of mechanisms of failure in the cement/peat soil composite. Investigations concerning the applicability of computed tomography in soil micromechanics are demonstrative in character and the presented conclusions suggest further directions for research.
    Źródło:
    Studia Geotechnica et Mechanica; 2014, 36, 3; 57-66
    0137-6365
    2083-831X
    Pojawia się w:
    Studia Geotechnica et Mechanica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Forecasting of vertical displacements based on a time series
    Autorzy:
    Gadomski, J.
    Gadomska, M.
    Kumor, M. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/224389.pdf
    Data publikacji:
    2007
    Wydawca:
    Politechnika Warszawska. Wydział Geodezji i Kartografii
    Tematy:
    przemieszczenia pionowe
    szeregi czasowe
    pomiary geodezyjne
    vertical displaceents
    time series
    engineering surveying
    Opis:
    Before research, a graphical analysis of time series is important to carry out because the configuration of empirical points in a proper Cartesian coordinate system enables one to make a decision which class the researched trend function belongs to. When verifying the model it should be checked whether received values of structural parameters estimation are reasonable. The method of extrapolation of time series can be used to forecast only in case when the mechanism of development of the researched effect does not change in time considerably or in case if the mechanism of development of the researched effect is not known and we cannot recognize it. The forecast horizon can be dependent on inertia of researched variables. For variables with a big inertia the forecast horizon can be considerably longer. Longer forecast horizon corresponds with less probability of occurrence of the provided state and simultaneously certainty of the forecast is less. Another question is a stability of the model. It does not mean that the model will be stable after the period the model was estimated, i.e. it will be stable in future. Adaptive models are useful in case of lack of stability in the researched period. Forecast procedures based on those models assume that the effect intensification in time can be segmental, i.e. "smooth", only in some intervals of time. Such models are particularly important for short-term forecasts. Taking one of the following models into account depends on: - clear interpretation of model's parameters, - possibility of a simple estimation of the model's parameters, - the level of accuracy that the model describes the effect's development in time. It should be noticed that building a "good" model describing the given effect on the base of data from the past not always can be proper in future. To enlarge forecast certainty (especially for short time series) several forecasting methods should be used and their results should be compared.
    Źródło:
    Reports on Geodesy; 2007, z. 1/82; 69-74
    0867-3179
    Pojawia się w:
    Reports on Geodesy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cone penetration test in assessment of soil stiffness
    Autorzy:
    Tschuschke, W.
    Kumor, M. K.
    Walczak, M.
    Tschuschke, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2060279.pdf
    Data publikacji:
    2015
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    soil stiffness
    SCPTU
    cohesive soils
    Opis:
    The paper presents proposals for the assessment of subsoil stiffness based on results of the seismic cone penetration test. Correlations between penetration parameters and constrained modulus were determined for three genetically different groups of cohesive soils. For the analyzed soil material quantitative estimation was also conducted for the parameter, which determines the relationship between the constrained modulus and initial shear modulus. A marked trend was shown for this parameter with the soil behavior type index used in the classification of soils in the cone penetration test.
    Źródło:
    Geological Quarterly; 2015, 59, 2; 419--425
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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