Five-parameter model

Figures 18.3 and 18.4 show the observed versus calculated penetration rates for wells A and B using the five-parameter model. As seen the results have not...

Figure 2 shows the profile of the 27-29 ppm spectral region of three polymers which served as models (1J ) for ethylene propylene rubber. The better agreement between the observed spectrum and the five-parameter model strongly suggests the three-parameter model is less realistic as an explanation for the polymerization mechanism. Table VII compares the observed profiles of EPDM rubbers made with a Ziegler catalyst system. The ratio of... 

Russell et al. (1992) developed a five parameter model for 63 compounds. The parameters include surface area and atomic charges selected from an initial list of 165 descriptors. The standard deviation was 0.375 units. 

Window diagrams and related methods may in principle be applied to optimization problems in more than one dimension. The main difference compared with one-parameter problems is that graphical procedures become much more difficult and that the role of the computer becomes more and more important. Deming et al. [558,559] have applied the window diagram method to the simultaneous optimization of two parameters in RPLC. The volume fraction of methanol and the concentration of ion-pairing reagent (1-octane sulfonic acid) were considered for the optimization of a mixture of 2,6-disubstituted anilines [558]. A five-parameter model equation was used to describe the retention surface for each solute. Data were recorded according to a three-level, two-factor experimental... 

The "five-parameter" model as described in equation [5] relates the viscosity of a particular resin system to five material parameters and time and temperature. It should be noted that the model assumes an overall reaction order of unity. 

The limitation of the five parameter model necessitated the development of a model that treats the overall reaction order as a separate, independent parameter. Through the relationship of the general equations for the first order (n = 1) kinetics ... 

Four- and five-parameter models have also been proposed. An example of the four-parameter model is the Cross-Williamson model given by (14)... 

Katritzky et al. (2007JCIM782) proposed a general QSPR model for a wide range of sodium salts, potassium alkanecarboxylates and p-isooctylphenol ethoxylated phosphates. Correlation was studied using a dataset of 181 anionic surfactants of Critical Micelle Concentration values measured at 40 °C with molecular descriptors calculated by CODESSA PRO. A five-parameter model was obtained involving descriptors calculated for the whole molecule and for the hydrophobic and hydrophilic fragments separately. The reported statistical parameters are as follows R = 0.897, r2 = 0.877, F = 303.7115, s = 0.087. 

Tables 5.4, 5.5 and 5.6 give derivations of equations for, respectively, four-parameter (OTTOSON) model, five-parameter model. Bulk shear moduli model and Endochronic cracking model, which have been used in the existing vessels to present the concrete failure. Reference is made to above reference by the author on other failure criteria including bulk and shear moduli and Endochronic cracking models.

This is a five-parameter model given by the expression... 

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