Design space ranking

Figure 5.13 Block diagram of the design space ranking strategy in heuristic design space exploration.

The remaining reactors are of similar design as shown in Fig. 22. These are bottom fed, completely filled vessels. There is a central upward pumping screw surrounded by a draft tube through which coolant circulates. The reactant syrup descends in the annular space between the draft tube and the jacketed reactor wall. In this annular space is a circular rank of manifolded vertical tubes with circulating coolant... 

As already presented in the section on Design , for the strategy WGS 2, a primary library containing 490 catalysts was designed by partitioning the search space. In Fig. 10.9, the catalysts are ranked as a function of the CO conversion. 

The discussion in section 2 focused on how to combine descriptors and SAR analysis methods into a form that would allow a virtual library to be scored. These scores are the basis for the design, which looks to obtain a suitably optimal subset of the library. There are different ways of finding the (near-)optimal subset, which will now be discussed. A point that needs to be reiterated is that the scores are only approximate, and that the libraries do need to some extent to explore unknown SAR space, or face the danger of optimising into a dead-end. The types of information generated by the descriptors and SAR are (i) distance matrices, in which each element is the distance between a pair of molecules (ii) ranks and scores, in which each molecule is scored on its own merits (iii) ensemble scores, in which the... 

Consider a numerical ranking, using a equal interval scale for each criterion. (Method A requires 1.1 min/unit, while method B requires 1.0 min/unit method A requires 50 m of floor space, while method B requires 40 m. ) However, managers generally want to combine the criteria. Table 23 shows one approach. After completing the evaluation, have the affected people sign off on the evaluation form. Then go back and select features from the alternatives to get an improved set of designs. 

The dimension of the space ImL is also called the rank of map L. We designate... 

LRVPs in closed coupled design with variable pressure ports for covering the entire pressure ranging from approximately 40 to 1013 mbar represent at present the most frequently used design with new installations due to their good price-performance ratio. But even these vacuum pumps do not meet all the requirements. Thus, deposits in the dead spaces and drUHngs as well as defects of the valves ofthe variable pressure ports rank among the most frequent causes of failure. 

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