The linear ranges were 0～90 ng(PFLX) and 0～110 ng(OFLX). The correlation coefficients of them were 0.998 and the linear regression equations were C=3.21×10(-3)A-(3.84) for PFLX and C=4.88×10(-3)A-3.54 for OFLX.
Results:Detected at 485 nm wavelength,the linear regressive equation was A = 8. 130C + 0. O33,r2 = 0. 996 of which linear range was 0. 005-0. 230 mg·ml-1. The average recovery was 97. 99%±3. 96%(RSD = 4. 04%).
Results RICG′s LEF was (57.1±11.8)%,UCG′s LEF was (57.8±12.8)%,there are almost no difference between average values of two methods(P>0.05), then the coefficient of correlation r =0.82(P<0.001)and the regression equation was Y = 0.89X + 7.1(P<0.001).
The regression equation of calibration is y = 0.085 6 x+0.001 2,r = 0.998 2(μg/25 mL), with a correlation coefficient of 0.998 2. The method can be used for the determination of trace Vitamin C in fruits and vegetables with satisfactory results.
The authors determined the boundary of Dagujia river basin based on 3S technology(DEM was made based on the relief map with the scale of 1∶250 000),analyzed the land-use change during 1986～1992 and 1992～2000 and built the regression equation of runoff and rainfall in the two periods.
A linear regression equation (p >amp;lt; 0.01) was found to be a better fit for the relationship between throughfall of the secondary birch forest and rainfall outside the forest.
A method for choosing the algorithm constants is designed such that the probability for not exceeding the unknown root of the regression equation is arbitrarily close to 1.
A multiple regression equation was formulated to calculate the maximum anatomical cross-sectional areas and volumes in the muscles of the lower extremities with respect to some anthropometric parameters.
Under the optimal conditions, the decrease in reductive peak currents of CV was proportional to heparin concentration in the range 0.1-8.0 mg/L with the linear regression equation Δip″(nA) = 400.42 + 1563.11c (mg/L), (n = 14, γ = 0.993).
The regression equation was A = 0.0439C(μg/L) + 7.2 × 10-3.
The regression equations revealed a linear relationship between the concentration of the analytes injected and the peak area detected by DAD.
The canopy biomass was derived by adopting the regression equations to all branches of each individual tree.
3) Cubic regression equations (p >amp;lt; 0.01) which describe the relation between throughfall, stem-flow and canopy interception in the virgin pine forest and rainfall in an open field were fitted.
In order to accurately estimate the size of the carbon pool and the capacity of the carbon sink in the forested areas of Xiaolong Mountain in Gansu Province, we have established regression equations of organ biomass of eight tree species.
Both linear regression equations and nonlinear relationships obtained with the help of a neural network were shown to accurately predict mutagenic activity for the compounds structurally similar to those in the training sample.