Plausibility tests

Quality-assurance procedures have to be established for the checking of both input and results checks of energy balances, plausibility tests, and comparison with steady-state calculations and with results from similar cases. These checks are demanding and time consuming and thus prone to be omitted but are mandatory for reliable simulations. 

Hint Use also other compound properties that are available or that can be estimated to perform simple plausibility tests on the experimental vapor pressure and aqueous solubility data of BC at 25°C. 

By fitting experimental data for different deformation modes to these functions, the three network parameters of unfilled polymer networks Gc, Ge, and ne/Te can be determined. The validity of the concept can be tested if the estimated fitting parameters for the different deformation modes are compared. A plausibility criterion for the proposed model is formulated by demanding that all deformation modes can be described by a single set of network parameters. The result of this plausibility test is depicted in Fig. 44, where stress-strain data of an unfilled NR-vulcanizate are shown for the three different deformation modes considered above. Obviously, the material parameters found from the fit to the uniaxial data provide a rather good prediction for the two other modes. The observed deviations are within the range of experimental errors. 

BALTIC contains all public ICES data from 1900 to 2005 including the Restricted Data FIMR 1996-2004 with permission of FIMR but excluding those that failed the additional plausibility tests or were outside the area of interest. 

A comparison of the alignment score of the target sequence with (many) different template proteins can be the basis of rating the significance of the produced structure model. P-values are a version of this approach that also applies to sequence analysis methods (see Chapter 2 of this volume), for which is has been studied extensively [9, 11, 70, 71]. In addition, the resulting models can be subjected to a wide variety of plausibility tests in order to ascertain their protein-likeness. Many of these checks will be made on the full-atom model of the protein that results from the procedures described in Chapter 5 of this volume. 

In a statistical risk-scoring system, aU scores must meet a plausibility test. High risk scores must be produced for high risks a lower-level risk should not fall in a high-risk category. 

Plausibility tests with respect to the results, together with further evaluation... 

Even if a proposed mechanism accounts for the kinetic data, it is not necessarily correct. An important plausibility test is given by the magnitudes of the rate constants required to account for the phenomenology. In both gas- and solution-phase reactions there are natural upper bounds to the rate constants. A mechanism requiring larger values of k cannot be correct. These conditions are easily established for gas-phase reactions. The upper bound for the rate of a second-order reaction is fixed by the total rate of binary collisions, (2.21),... 

Since we do not know the proper values for X and t, we need a way of Judging plausible values of X and t from the data. We do this by testing the transformed background measurements for normality. Our choice of a test for normality is the probability plot correlation coefficient r (12). The coefficient r is the correlation between the ordered measurements and predicted values for an ordered set of normal random observations. We denote the ordered background measure-ments by yB(l). where yB(l) < yB(2) < yBCnn) denote the... 

Although potassium chloride fluids performed better than the calcium and zinc halides, damage was still measurable. These results, confirmed in triplicate, were unexpected since it is well accepted that even 0.5 weight % KC1 should protect Berea cores against permeability damage. The most plausible explanation lies in variation between the test procedures. 

Table 9.1. Specific (1+ and / ) and average (Iav) information contents (in bit) and specific plausibilities (77+ and il ) in cases of various a priori probabilities of qualitative tests... 

D) If the model still seems plausible after these tests, go on to a detailed analysis. If there are gross inconsistencies, the model is probably wrong. 

Such processes assume that molecules from a fluid phase in contact with a solid catalytic surface combine chemically with catalyst surface molecules and reaction subsequently proceeds between chemisorbed molecules followed by desorption of the products. A large number of different rate equations with varying numbers of constants can be derived by making various auxiliary assumptions and tested against experimental rate data. Since a more or less plausible mechanism is postulated, the feeling is that a chosen rate equation is somewhat extrapolatable outside an experimental range with greater... 

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