Computer Programs
NEA-0212 SAHYB-2.
last modified: 01-NOV-1967 | catalog | categories | new | search |

NEA-0212 SAHYB-2.

SAHYB-2, Solution of Ordinary Differential Equation with User-Supplied Subroutine

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1. NAME OR DESIGNATION OF PROGRAM:  SAHYB-2.
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2. COMPUTERS
To submit a request, click below on the link of the version you wish to order. Rules for end-users are available here.
Program name Package id Status Status date
SAHYB-2 NEA-0212/01 Tested 01-NOV-1967

Machines used:

Package ID Orig. computer Test computer
NEA-0212/01 IBM 360 series IBM 360 series
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3. NATURE OF PHYSICAL PROBLEM SOLVED

SAHYB-2 is a general purpose programme 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 are included in the programme, as:
Function generation, delay generation, steps, ramps and pulses, as well as a simplified standard output procedure - boundary value problems or parametric optimisation may be handled by iterations adding a subroutine called REPEAT.
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4. 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.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

   Maximum 150 differential equations of the first order.
   Maximum 30 tables for function generator or delay lines.
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6. 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.
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7. UNUSUAL FEATURES OF THE PROGRAM

Uses for the problem description an analogue oriented vocabulary which is a sub set of FORTRAN, and is easily handled by engineers or physicists who are not programming specialists.
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8. RELATED AND AUXILIARY PROGRAMS

Uses the subroutines for the CALCOMP digital plotter described in report EURATOM 2280/F, by P. Moinil and J. Pire. (programmation relative our CALCOMP).
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9. STATUS
Package ID Status date Status
NEA-0212/01 01-NOV-1967 Tested at NEADB
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10. REFERENCES

      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
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11. HARDWARE REQUIREMENTS: MACHINE REQUIREMENTS
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NEA-0212/01 FORTRAN-IV
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13. OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED:  Standard FORTRAN monitor.
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

ANY OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS
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15. NAME AND ESTABLISHMENT OF AUTHOR

        H. d'Hoop and R. Monterosso
        Commission des Communautes Europeennes
        CETIS
        21020 - Ispra
        Italy
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16. MATERIAL AVAILABLE
NEA-0212/01
File name File description Records
NEA0212_01.001 SOURCE & DATA 360/65 1701
NEA0212_01.002 OUTPUT 108
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17. CATEGORIES
  • P. General Mathematical and Computing System Routines

Keywords: ordinary differential equations, programming languages, special functions.