Application of MATLAB CFTool in the Graphical Calculation of Grain Size Parameters
WANG Jianfeng
QIU Jufei
ZHAO Jianli
DAI Qingqing
MA Yue
Abstract：Sediment grain size parameters are used for numerical characterization of particle size distribution, including average grain size, sorting coefficient, skewness and kurtosis among others.Moment and graphical techniques are the two principal forms to calculate grain size parameters for sedimentary analysis.The graphic method must calculate the cumulative curve by hand working diagram, which is hard and less benefit the calculation of large amount of samples.The method proposed in this study is to convert the process of the cumulative curves of sediment samples into the simulation and interpolation problems of probability cumulative curve, in order to guarantee the data's monotone and shape.CFTool shape-preserving interpolation method in MATLAB was used to quickly and accurately solve the particle diameter of 5, 16, 25, 50, 75, 84 and 95 of the probability cumulative curves of the samples, then the grain size parameters were obtained with the Folk-Ward graphic method and compared with the traditional manual plotting method to calculate the grain size parameters.The results showed that the method is effective, and the results are reliable, and the calculation efficiency is improved obviously.
Keywords：MATLABShape-preservingsedimentary materialGrain-size parameter
Publication Date：2018-01-01
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：4( 115-118 )