Overton, W. Scott; Colby, Jon A.; Gourley, Jonna; White, Curtis. 1973. FLEX 1 user's manual. Seattle: University of Washington; Coniferous For. Biome Internal Rep. 126. 96 p.
FLEX1 is a general model processor, patterned after Klir'sGeneral Sequential System Paradigm (Figure 1) . Specifically, theprocessor is a discrete time flux oriented realization of the generalparadigm and can process non-linear, non-stationary, environmentallycontrolled state variable system models with explicit memory. Thecurrent version is restricted to not more than 63 state variables, 40input variables, 200 memory variables, and 50 output variables.There are also restrictions on the number of functions identified, andother restrictions, which will be elaborated in the appropriate part ofthis writeup.
The system is implemented in the Oregon State University OS-3operating system, is specific for the CDC 3300 computer, and may beoperated only from a teletype.
Output may be monitored at the teletype, line printed and dumpfiled. Satellite programs have been written for plotting and listingfrom the dump file.
FLEX1 is designed to be expanded in two directions. First willbe further elaboration as a single level model processor concentratingall capacity into this single level. Second will be elaboration into amulti-level, hierarchical model processor (REFLEX), capable ofmixed resolution. The two capacities are being incorporated into asingle processor, FLEX2, which is in the final stage of development atthis printing, and will be operative in late 1973.