To obtain accurate soil parameters and improve the accuracy of acoustic-soil discrete element simulation model, we studied model’s parameter calibration. The test was carried out using measured acoustic velocity dominant frequency as response value (index). Firstly, Plackett—Burman scheme used to sensitivity ranking wave. that significantly affect wave were obtained: Shear modulus, Poisson’s ra...

To improve the accuracy of discrete element research, physical and simulation experiments were used to calibrate cotton stalk contact parameters. Based on stalk-stalk stalk-steel mechanics, parameters measured in experiments, software was build model. In process, Plackett-Burman experiment screen three significant factors from six initial factors. The steepest determine optimal interval A secon...

In this work, a clean and simple magnetic solid-phase microextraction based on L-arginine modified dialdehyde starch nanocomposite was developed for the preconcentration determination of diclofenac in biological samples by UV–Vis Spectrophotometry. A Plackett–Burman experimental design used to evaluate influence effective parameters. Significant parameters were further optimized Central Composi...

AbstractInvestigation of alkaline protease production under different fermentation conditions using one factor at a time involving temperature, pH, incubation as well carbon and organic nitrogen sources .The results showed that the maximum activity (470U/ml) was obtained peptone 7.5 (g/L), glucose 5 pH 10, 24h 35oC. Further more, Two sequential statistical designs were used to optimize these ph...