Grain growth kinetics were studied by fitting the appropriate grain size data from the three XRD-based methods to the well-known Burke equation. Variations observed in the absolute grain sizes calculated from different methods were in agreement with previous studies. In spite of these variations, ...
摘要: Focuses on the grain size determination for parallel processing in the United States. Optimization of parallel programs; Application of grain packing on extended serial and concurrent programming language; Technique to develop a parallel-processor simulator....
PI-HCDFs use several time-averaged g-rings simultaneously and contain more information than conventional DF-images. Easy contrast interpretation and less dark field images required, allows fast, robust and reliable grain size determination. 展开 ...
Grain-size determination by laser diffraction can be a very useful tool in soil genetic studies. In three deeply weathered soil profiles from Brazil, we have been able to identify changes in clay content, grain-size distribution of the clay fraction, and disappearance of silt fractions as a res...
Results of these counts provide a comparative test of traditional and Gazzi-Dickinson methods. There are two reasons for variation of modal composition with grain size: 1) the breakage of fragments into constituent grains, and 2) actual mineralogic variation with grain size. The Gazzi-Dickinson ...
Determination of sediment grain size Sample preparation and grain size measurements were performed at the Key Laboratory of Mongolian Plateau Environment & Global Change. Sample preparation included air drying, sieving for impurities, removal of organic matter and desalting19. The quarter method was used...
methods such as SPH and MPM, the CFD–DEM method can model the motion of debris flows from both macroscopic and mesoscopic sales [62]. The determination of void fraction is of great importance in CFD–DEM coupling. Generally, according to the ratio between grain diameter and fluid grid size...
6.4.5Grain size analysis ASTM E112 and ISO 643 ASTM E112: Standard test methods for determiningaverage grain size.58ISO 643: Steels—micrographic determination of the apparent grain size.59 ASTM E112 covers three test methods to determine the average grain size: the comparison procedure, the ...
McManus, J., 1988. Grain size determination and interpretation. In.Techniques in Sedimentology. Tucker, M., ed., Wiley Blackwell, Oxford, 63–85. Google Scholar Milliman, J. D., and Meade, R. H., 1983. World-wide delivery of river sediment to the oceans.Journal of Geology,91(1): 1...
Methods). Grain-size reduction occurs through the process of dynamic recrystallization during dislocation creep, whereas grain growth controls the grain size during diffusion creep44. Therefore, only dislocation creep is responsible for grain-size reduction. On the basis of grain sizes from ...