Influence graphs, construction

Step 1. Construction of the influence graphs, which represent the extent to which a given chemical species is present within the process in a given operational state. 

Then, we construct the influence graphs (IGs) of HCN and HCHO for the initial and goal states (Fig. 15), and from these we can identify the... 

The identification of those variables that have a major effect on plutonium peroxide precipitation was done in two ways. The first way used t-test values associated with each variable. The comparative magnitude of these values indicates the relative importance of the variable. The second way involved a subjective evaluation of the relative importance of each of the variables based on a visual comparison of the graphs constructed from the experimental data (Figures 1 through 12 plus a couple of dozen other comparable graphs that could not be included in this paper because of space limitations). The results of the subjective evaluation indicate that only the nitric acid concentration and the rate of hydrogen peroxide addition have a major effect on the relative filtration time. The other four variables influence the... 

If the pH of the titrand is monitored throughout a titration, a graph.of pH against amount of titrant added may be constructed. The characteristics of this curve are important in the selection of suitable titration conditions and indicators. Of particular importance are the position of the point of inflexion representing the neutralization point, the slope of the curve in the end point region, and the size of the end point break . The influences of concentration and the strength of the acid or base are summarized in figures 5.1, 5.2 and 5.3. 

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