With the choice (15) for the limiting coefficient θ, additional dissipation is inserted when ν attains large values as well as in near-vacuum regions.
There are currently limited loss coefficient data available for predicting pressure losses in diaphragm valves for Newtonian fluids, and even fewer for non-Newtonian fluids.
Typical values of limited diffusion coefficient under normal conditions are of the order of 10−10 cm2/s, that corresponds to the effective viscosity of protein globule of the order of hundreds poises.
In this study, Duncan's cost model was modified by adding the statistical constraints to develop the design model of DS ¯¯¯X chart for the optimization of design parameters sample size, control limit coefficient, warning limit coefficient and sampling interval.
Detection limit, coefficient of variation (n=6) and sampling rate were estimated at 0.3 μg L−1, 0.8% and 20 h−1, respectively.
For an ¯¯¯X control chart, the design involves the selection of three parameters namely, the sample size, the sampling interval and the control limit coefficient.
Detection limit, coefficient of variation and sampling rate were evaluated at 2.7 µg L−1, 5.4% (n=6) and 4 sample h−1, respectively.
Optimal values for the design parameter, the moving subgroup size, the sampling interval, and the control limit coefficient are determined by minimizing the loss-cost model.
We present a cost model and determine the optimal values of the design parameters, the sample size, the sampling intervals and control limit coefficient by minimizing the expected cost per unit time with respect to exponential parameters change.
Optimal values of the design parameters including the sample size, the sampling intervals, and control limit coefficient are solved by minimizing the expected total cost per unit time, based on the varieties of combinations of Weibull parameters.
