Taking the strict solution of the standard constant coefficient KdV equation as the initial value, the approximate analytical solution of the derived equation is obtained by means of homotopy analysis method. Based on the new equation and its analytical solution, some complicated and changeable ...
Barten, A.P. (1987). «The coefficient of determination for regression without a constant term». The Practice of Econometrics. Ed. R.D.H. Heijman y H. Neudecker, 181-189.Barten AP. 1987. The coefficient of determination for regressions without a constant term. This volume....
While the efficacy of AOD as an explanatory variable in large-scale studies is clear, due to its continuous spatial coverage, on a local scale, both spatial and temporal factors might affect its ability to capture air quality structures, especially when pollution levels are relatively low. This ...
where μ is the proportionality coefficient. If μ is constant, integration of eqn [11] gives [12]lnx=lnx0+μt⇒x=x0exp(μt) where x0 is the biomass at zero time or inoculum size (Figure 2). Sign in to download full-size image Figure 2. Simple growth curves: exponential and log...
If the final test result is moderate, this indicates that the lag value of ROE is a useful auxiliary variable, and this auxiliary variable can be used to weaken potential bias in the coefficient estimating process. Panel A of Table 9 shows the summary statistics for the model estimate ...
Differently from what observed for T cells, the absolute number of CD56+ NK cells detected in the peripheral blood of our patient was variable overtime remaining constantly below normal levels up to the latest timepoint analysed (Fig. 6A, B). Notably however, all NK cells displayed expression...
with a coefficient of variation (C.V.) of 6.9% in a 100-cycle measurement. Stretchable electronic devices have difficulty meeting the requirements of enhancing both the high gauge factor (GF) and working strain at the same time, which reflects the sensitivity and elasticity32. In this study,...
a. f b. v c. vx Cost Function: A cost function is a mathematical representation of the total cost that is expected to be incurred in a firm. A cost function has two main components. The variable component represents the variable cost and the fixed component ...
stand, respectively, for the n-0 matrix element of the ith component of the atomic dipole moment operator, the transition frequency between states |n〉 and |0〉, and the damping constant for the same transition (I have used the symbol ωn′ in the middle expression in (9.44c) for notati...
First, in our main analysis we use a dependent variable which reflects plants’ sales derived from new products. This reflects an emphasis on more radical innovation rather than either imitation or more incremental product change (Schnaars, 1994). To consider whether our results also hold for ...