The experiments were designed considering four variables including pH, the initial concentration of TC, catalyst concentration and H2O2 concentration at three levels.
Considering four variables and five levels, the total number of runs using a full-factorial design would be equal to 625 (54).
The optimization of the system was performed using factorial design and Doehlert matrix considering five variables: eluent concentration, PAR solution pH, sample flow rate, PAR solution concentration and sample pH.
The basic model of HIV-1 dynamics, first introduced by Perelson and colleagues in 1995 [ 8], is a class model considering three variables: uninfected cells, infected cells and free viruses.
We considered two variables for food awareness.
To update the nodes' reputation score, the reputation system considers two variables: delivered and dropped bundles.
In order to validate the approaches, we considered two variables: consistency: the SPLS effectively converged to the SRLS during the learning process?
Regarding parental background we consider two variables: (i) mother's education and (ii) number of books at home when individuals were 16 years old.
For a given NFDE, consider two variables x and t, P ( u, u t, u x, D t α u, D x α u, … ) = 0, 0 < α ≤ 1, (41).
