1. NAME AND TITLE
SAHYB-2: Solution of Ordinary Differential Equation with User-Supplied Subroutine.
des Communautes Europeennes, CETIS, 21020 – Ispra, Italy through the OECD
Nuclear Energy Agency Data Bank, Issy-les-Moulineaux, France.
3. CODING LANGUAGE AND COMPUTER
Fortran IV; IBM 360 Series (C00820I036000).
4. NATURE OF PROBLEM SOLVED
SAHYB-2 is a general purpose program for the solution of ordinary differential equations. These are written in a user-supplied subroutine called DER, which uses notations very close to mathematical formulas. Special mathematical functions included in the program are function generation, delay generation, steps, ramps and pulses, as well as a simplified standard output procedure - boundary value problems or parametric optimization may be handled by iterations adding a subroutine called REPEAT.
5. METHOD OF SOLUTION
Integration is carried out by constant step fourth-order Runge-Kutta method, or by a fixed or variable step Adams-Moulton predictor corrector method.
6. RESTRICTIONS OR LIMITATIONS
Maximum 150 differential equations of the first order;
Maximum 30 tables for function generator or delay lines.
7. TYPICAL RUNNING TIME
Varies greatly with the size of problem - range from few minutes for small systems (less than 10 differential equations) to a half hour for large problems.
8. COMPUTER HARDWARE REQUIREMENTS
9. COMPUTER SOFTWARE REQUIREMENTS
IBM 360 OS (Standard FORTRAN monitor.).
a) Included Documentation
b) Background Documentation
H. D Hoop and R. Monterosso, “SAHYB-2 - A Programme for the Solution of Differential Equations Using an Analogue-Oriented Language,” Report EURATOM 3622/E.
11. CONTENTS OF CODE PACKAGE
The package is distributed on a CD with a compressed zip file including source files, and sample data and output.
12. DATE OF ABSTRACT
KEYWORDS: ORDINARY DIFFERENTIAL EQUATIONS, PROGRAMMING LANGUAGES, SPECIAL FUNCTIONS