Rectangular, model

FIGURE 3.12. (a) Measured C12 I(V) data (circular symbols) is compared with calculated one (solid curve) using the optimum fitting parameters of <1>b = 1-42 eV and a = 0.65. Calculated I(V) from the simple rectangular model (a = 1) with <1>b = 0.65 eV is also shown as dashed curve. Current is on log scale, (b) Contour plot of A (b, B and a, where the darker region corresponds to a better fitting. 

Even simpler, the rectangular model of a reaction layer (Fig. 3.6) was often used instead ... 

Figure 3.6. The bell-shaped and rectangular models of the electron transfer rate W r).

In the inverted region the recombination layer is first extended and then shifted from the contact as AGr increases (Fig. 3.5). The bell-shaped Wr t) can be approximated by the rectangular model of the layer (3.55), whose inner border is r, = / A and external border is r, R I A (Fig. 3.6). In highly polar solvents... 

A smooth inversion produces a smooth image of a true rectangular model, while the inversion with the minimum gradient support stabilizer generates a sharp image, close to the true model. 

Finite rectangular models lx. /,. / in the space of dimension d = 2, 3 have also been studied, where lx. ly. I are the dimensions of the lattice sides in the units of bond length (we have a constant lattice) lz for a planar lattice is zero. 

One can see from Figure 13.7 that the rectangular model is able to qualitatively account for the observed trends in cohesive energy, equilibrium nearest-neighbor... 

The rich structure of superlattice harmonics predicted by the rectangular model is mirrored by the superlattice peaks observed in the Dy/Lu sample of fig. 15. At the opposite extreme, ufien only a sinusoidal modulation of composition exists, a single... 

Expressions such as this interpolate between the perfect rectangular model (y=0) and an alloy (y —> oo). Figure 19 shows the result of a diffusion model analysis (Beach et al. 1993b) for a Dy/Lu superlattice, using X-ray data to determine the Dy composition and lattice spacing. 

Based on a rectangular model assumption of the glass fiber/pol3nner fiber agglomerations, the following equation can be used to calculate the necessary impregnation time (f) in order to achieve a void content which is lower than a certain limiting value ... 

A rectangular model based on Darcy s law for predicting the degree of impregnation (or the void content, respectively) during the pultrusion process was developed in [8]. It leads to the following equation for the void content X, ... 

Figure 3.24. Comparison of pore-size distributions based on slit shaped (A, square and rectangular ( ) model pores (Davies and Seaton, 1998).

---