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  2. Thermodynamic databases for pure substances - Wikipedia

    en.wikipedia.org/wiki/Thermodynamic_databases...

    Thermodynamic data is usually presented as a table or chart of function values for one mole of a substance (or in the case of the steam tables, one kg). A thermodynamic datafile is a set of equation parameters from which the numerical data values can be calculated. Tables and datafiles are usually presented at a standard pressure of 1 bar or 1 ...

  3. Discontinuous deformation analysis - Wikipedia

    en.wikipedia.org/wiki/Discontinuous_Deformation...

    Discontinuous deformation analysis (DDA) is a type of discrete element method (DEM) originally proposed by Shi [1] in 1988. DDA is somewhat similar to the finite element method for solving stress-displacement problems, but accounts for the interaction of independent particles (blocks) along discontinuities in fractured and jointed rock masses.

  4. Joint Committee for Guides in Metrology - Wikipedia

    en.wikipedia.org/wiki/Joint_Committee_for_Guides...

    Evaluation of measurement data – Supplement 1 to the "Guide to the expression of uncertainty in measurement" – Propagation of distributions using a Monte Carlo method. JCGM 102:2011. Evaluation of measurement data – Supplement 2 to the "Guide to the expression of uncertainty in measurement" – Extension to any number of output quantities.

  5. Measurement system analysis - Wikipedia

    en.wikipedia.org/wiki/Measurement_system_analysis

    A measurement system analysis (MSA) is a thorough assessment of a measurement process, and typically includes a specially designed experiment that seeks to identify the components of variation in that measurement process. Just as processes that produce a product may vary, the process of obtaining measurements and data may also have variation ...

  6. Enzyme assay - Wikipedia

    en.wikipedia.org/wiki/Enzyme_assay

    Enzyme assays can be split into two groups according to their sampling method: continuous assays, where the assay gives a continuous reading of activity, and discontinuous assays, where samples are taken, the reaction stopped and then the concentration of substrates/products determined.

  7. Discontinuous Galerkin method - Wikipedia

    en.wikipedia.org/wiki/Discontinuous_Galerkin_method

    In applied mathematics, discontinuous Galerkin methods (DG methods) form a class of numerical methods for solving differential equations. They combine features of the finite element and the finite volume framework and have been successfully applied to hyperbolic , elliptic , parabolic and mixed form problems arising from a wide range of ...

  8. Particle-size distribution - Wikipedia

    en.wikipedia.org/wiki/Particle-size_distribution

    The closer this value is to 1.0, the better the data fit to a hyperplane representing the relationship between the response variable and a set of covariate variables. A value equal to 1.0 indicates all data fit perfectly within the hyperplane. λ: Gas mean free path (cm) D 50: Mass-median-diameter (MMD). The log-normal distribution mass median ...

  9. Measurement uncertainty - Wikipedia

    en.wikipedia.org/wiki/Measurement_uncertainty

    In metrology, measurement uncertainty is the expression of the statistical dispersion of the values attributed to a quantity measured on an interval or ratio scale.. All measurements are subject to uncertainty and a measurement result is complete only when it is accompanied by a statement of the associated uncertainty, such as the standard deviation.