Metric system characteristic

An additional convenience characteristic of the metric system is that the volume and length measurement domains are related in that one cubic centimeter, which is based on length measurement, is the same as one milliliter, which is strictly a volume unit. 

A solution space, a, consisting of hyperrectangles defined in the decision space, X, is a basic characteristic common to all the learning methodologies that will be described in subsequent sections. The same does not happen with the specific performance criteria tfi, mapping models /, and search procedures 5, which obviously depend on the particular nature of the systems under analysis, and the type of the corresponding performance metric, y. 

The nature of the performance metric, y, is determined by the characteristics of the specific process under analysis. Since we are particularly interested in analyzing situations where y is related to product or process quality, it is quite common to find systems where a categorical variable y is chosen to classify and evaluate their performance. This may happen due to the intrinsic nature of y (e.g., it can only be measured and assume qualitative values, such as good, high, and low ), or because y is derived from a quantization of the values of a surrogate continuous measure of performance (e.g., y = good if some characteristic z of the product has value within the range of its specifications, and y= bad, otherwise). 

In the absence of dynamic and static disorder, all partially filled band systems would exhibit coherent transport over long distances. With static and dynamic disorder, the modulation of the simple molecular orbital or band structure by nuclear effects entirely dominates transport. This is clear both in the Kubo linear response formulation of conductivity and in the Marcus-Hush-Jortner formulation of ET rates. The DNA systems are remarkable for the different kinds of disorder they exhibit in addition to the ordinary static and dynamic disorder expected in any soft material, DNA has the covalent disorder arising from the choice of A, T, G, or C at each substitution base site along the backbone. Additionally, DNA has the characteristic orientational and metric (helicoidal) disorder parameters arising from the fundamental motif of electron motion along the r-stack. 

The dimensional analysis performed with the dimensional system M, L, T, delivers, for the heat transfer characteristic of a stirring vessel, the following 6-para-metric pi-set ... 

A particularly important decision to make during a periodic review is whether or not revalidation is required. At a certain point in time, maintaining an old system becomes too ineffective for the expense incurred. There are no predefined metrics to base this decision on, but certain characteristics signal system/software degradation. 

The greater the number of such characteristics the greater the scale of potential reengineering required. In fact it may reach a stage where it is more cost-effective to entirely replace the system. Pharmaceutical and healthcare companies are encouraged to collect their own metrics to make this decision process more objective. Typically such decisions are very subjective, and care should be taken to make sure the decision is not unduly influenced by dominant personalities rather than real needs. 

Chapter 3—Process Safety Management Metrics commonly used in process safety management systems including leading, lagging, and near miss and activity and outcome, external and internal metrics as well as characteristics of successful metrics... 

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