Library routines

D. E. Amos, Sandia National Laboratories, Computer routine library—slatec/Complex Airy and subsidiary routines. 

A routine library is an operating system data set (or a list of them) that contains executable modules of routines. Such routines may be called from the CAD system during an application. They behave similar to macros in that they produce an entity as a result which may be stored in the data base. 

See ROUTINE LIBRARY. A routine is characterized by its formal parameters which will be substituted by entities of the proper type when the routine is invoked during an application. Furthermore, the routine has as attribute a reference to the routine library in which it is to be searched for, and it carries the type identification of the result in order to guarantee that the result type is correct. The name of the routine inside the library is stored as a user defined name in an indexL entry referring to this entity. Results of the routines may be of type real or geometric. 

Once a mass spectrum from an eluting component has been acquired, the next step is to try to identify the component either through the skill of the mass spectroscopist or by resorting to a library search. Most modem GC/MS systems with an attached data station include a large library of spectra from known compounds (e.g., the NIST library). There may be as many as 50,000 to 60,000 stored spectra covering most of the known simple volatile compounds likely to be met in analytical work. Using special search routines under the control of the computer, one can examine... 

The ordinary differential equations for f and C now form a fifth-order system which can be solved using a standard NAG library routine. The results are shown in Fig. 10.73. This figure also shows the numerical results for concentration obtained using a full numerical approach, and there is reasonable agreement between the two. 

The mass spectra of drugs are as varied as the molecules from which they are formed (see Table 11.1). Two major sources that are available for identifying drugs are computer library search routines and Mass Spectral and GC Data of Drugs, Poisons and Their Metabolites. ... 

Many current multidimensional methods are based on instruments that combine measurements of several luminescence variables and present a multiparameter data set. The challenge of analyzing such complex data has stimulated the application of special mathematical methods (80-85) that are made practical only with the aid of computers. It is to be expected that future analytical strategies will rely heavily on computerized pattern recognition methods (79, 86) applied to libraries of standardized multidimensional spectra, a development that will require that published luminescence spectra be routinely corrected for instrumental artifacts. Warner et al, (84) have discussed the multiparameter nature of luminescence measurements in detail and list fourteen different parameters that can be combined in various combinations for simultaneous measurement, thereby maximizing luminescence selectivity with multidimensional measurements. Table II is adapted from their paper with the inclusion of a few additional parameters. 

Gear, C. W. In Numerical Algorithms Group Library Manual 1984, Routine D02EBF. 

Often it is possible to consider the process or plant, as a system of independent sub-sets or modules, which are then modelled individually and combined to form a description of the complete system. This technique is also used in the large scale commercial simulation software, in which various library sub-routines or modules for the differing plant elements, are combined into a composite simulation program. 

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