Regionalized variable, definition

Figure 2.42 shows the variability risks analysis based on the toleranees assigned to meet the 0.2 mm toleranee for the assembly. Given that an FMEA Severity Rating (S) = 5 has been determined, whieh relates to a definite return to manufaeturer , both impaet extruded eomponents are in the unaeeeptable design region, as well as the bobbin and plunger end seal as shown on the Conformability Matrix in Figure 2.43. The toleranee for the brass tube base thiekness has no risk and is an aeeeptable design.

A follow-up study on soil radon gas and indoor radon gas was carried out in the Fredericton area. It was found that the individual correlation between soil gas radon and indoor radon on individual properties was not very high, but there was definitely a regional correlation. The reasons for the low individual correlation can be traced to other important variables such as age and type of construction of the homes. 

The screening measures for total petroleum hydrocarbons screening are done differently in various states, regions, and individual laboratories. In fact, the data that are reported as total petroleum hydrocarbons are so variable that much caution should be exercised when attempting to compare or interpret the data. As analytical methods evolve in response to environmental needs, the definition of total petroleum hydrocarbons may become more closely related to reality rather than to the respective analytical method. 

The key to the understanding of molecular geometry is in the definition of an holistic molecule described by one of the factors in a product function, equation 5.7. This factor represents the molecular wave function for the molecule of interest and defines non-local entanglement within a limited region of space that varies as a function of the environment. The relative confinement of the molecule means that the boundary conditions on the molecular wave function are variable, in the same sense as for the compressed atom. Different solutions are therefore found in different settings and particularly in different states of aggregation. Any structure revealed by the wave functions must likewise be a function of the surroundings. 

An alloy in the region ADBj such as that represented by the point P, at 35 atomic percent lead and 400° C, lies in a two-phase region, and the variance is accordingly stated by the phase rule to be two. The pressure and the temperature are the two variables the phase rule hence states that it is not possible to vary the composition of the phases present in the alloy. The phases are crystalline arsenic, represented by the point P directly to the left of P, and the molten alloy, with the composition P" directly to the right of P. The composition of the molten alloy in equilibrium with crystalline arsenic at 400° C and 1 atm pressure is definitely fixed at P" it cannot be varied. 

Our data set definitely shows high variability for any simple relationship between local wind speed and sea-salt aerosol concentration. This occurrence may only reflect unique meteorological conditions during one summer season because frequency plots of our wind-speed data show values outside the ranges of the expected seasonal averages prevailing in this region of the South Atlantic (21). The data set was also filtered (Table II, Case XII) to exclude samples collected at wind speeds less than 8 m/s. This trial exercise results in an increase in the slope when compared to Case I, but the correlation coefficient is unexpectedly lower. However, this manipulation does not represent true winter conditions because the temperature difference between the sea and the air would be different in the winter than it was for our February cruise. 

The dynamic variable J x is orthogonal [22-24] to the longitudinal total mass-current density Jk = Ju,p- This makes especially convenient the theoretical treatment of dynamical processes in small k region, where the collective type of the dynamics prevails [22-24], Using the definition (43), the Eqs. (39)—(42) can be easily rewritten for new set of dynamic variables, so that we obtain ... 

Fig. 3. In this free energy landscape the coordinate q fails to distinguish the basins of attraction of the stable states. If region A is defined by requiring that q is less than some limit (light gray region), points belonging to the basin of attraction of B are located inside A. Path starting from such points (such as the dark gray path) belong to the path ensemble but are not real reactive trajectories. For a correct definition of the stable states also the variable q must be taken into account...

The number of independent variables required to define the operation of an absorber or stripper may also be determined by applying the description rule, stated in Section 5.2.1. The number of trays or the column height is set by construction and may, in the design phase, be used as design variables. Since, by definition, the feeds are introduced at the top and bottom of the column, the feed locations are not variable. The feed compositions and thermal conditions are set outside the column region and are therefore beyond the operator s control. The operator can, however, control the valves on the two feeds and the two products. One of these four valves, usually the bottoms product valve, cannot be controlled independently since it must be set at steady state such as to maintain the required liquid level in the bottom of the column. The overhead valve is usually used to control the column pressure. The two feed valves may be controlled independently one controls the main process stream rate and the other controls the solvent or stripping gas flow rate. 

Within different lean oil rate regions, different specifications provide "more unique" definitions of the column performance. For instance, at a lean oil rate of around 700 kmol/h, the key component is ethane. Therefore in this region the column performance is better defined by specifying the ethane recovery or concentration than, say, the methane concentration in the overhead. This is because at about this lean oil rate, the dependence of the ethane recovery or concentration on the lean oil rate is stronger than that of the methane concentration in the overhead. At lower lean oil rates, propane becomes the key component hence, its concentration or recovery would be a better variable for defining the column performance. 

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