9, 10 p. rule

Figure 2-69. The two enantiomers of lactic acid assignment of R and S configurations to the enantiomers of lactic acid after ranking the four ligands attached to the chiral center according to the Cl P rules (OH > COjH > Me > H).

Figure 2-71. The ordered list of 24 priority sequences of the ligands A-D around a tetrahedral stereocenter, The permutations can be separated into two classes, according to the Cl P rules the R stereoisomer is on the right-hand side, and the S stereoisomer on the left.

Component activity rule (P-rule). If we increase the partial pressure of the electronegative (-positive) component we increase (decrease) the number of holes and decrease (increase) the number of excess electrons we increase (decrease) the numbers of all defects which individually increase (decrease) the X to M stoichiometry and decrease (increase) the others. As the other rules, these statements—since compensation effects do not occur—are not trivial in that they would simply follow from conservation laws, but reflect also the individual mass action laws. 

Goss, K. U. Schwarzenbach, R. P. Rules of Thumb for Assessing Equilibrium Partitioning of Organic Compounds Successes and Pitfalls, J. Chem. Educ. 2003, 80, 450-455. 

The next step is to establish a set of rules that are based on the expert s ranked set and ranges of indifference. Here, each solution in the ranked set is compared to every other solution in order to define rules of preference (P rules) and rules of non-preference (NP rules). A mle takes the form of a set of values, one for each criterion, where each value may be either 1 or 0. A value of 1 indicates that the first solution is better than the second with respect to that criterion, while a value of 0 indicates that the first solution is worse than, or not significantly different from, the second with respect to that criterion. If it is desired to include the threshold of indifference in the elaboration of the rules, ranking the second solution in the comparison is always considered in the worst possible light by adding or subtracting the range of indifference, as appropriate, to it. In other words, the first solution in the comparison is... 

When the entire set of P and NP rules has been established, some rules need to be eliminated for two reasons. First, if two P rules are the same, or if two NP rules are the same, then the rule needs to be included only once since it represents only one type of preference. Second, if a P rule is identical to a NP rule, they are both eliminated since the expert cannot rank one solution better than another solution for the same reason that he considers a solution worse than another solution. 

Now what about p Rule 3 gives us one working unit... 

Olive, J. P. Rule synthesis of speech from diadic rmits. In Proceedings of the International Conference on Acoustics Speech and Signal Processing 1977 (1977). 

Schwarz, J. C. P. Rules for Confirmation Nomenclature for Five- and Six-membered Rings in Monosaccharides and their Derivatives. Chem. Commun. 1973, 505. 

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