Programs NAES and SS: user-oriented programs for solving nonlinear algebraic equations and ordinary differential equations. [In FORTRAN IV]
Program NAES (Nonlinear Algebraic Equation Solver) is a Fortran IV program used to solve the vector equation f(x) = 0 for x. Two areas where Program NAES has proved to be useful are the solution for initial conditions and/or set points of complex systems of differential equations and the identification of system parameters from steady-state equations and steady-state data. Program SS (State Space) is a Fortran IV program used to solve a system of first-order, ordinary differential equations with a minimum of specialized coding. Program SS automatically provides a tabular listing and line-printer plots of the outputs. In addition, provisions are made to perform one-time preintegration calculations, read specialized input data, establish specialized output labels, handle piecewise continuous f(x(t),t), make x--y plots of output variables, and record the minima/maxima of specified variables. Subroutines were written to provide delay, level detection with hysteresis, and solutions to implicit equations. 26 figures, 1 table.
- Research Organization:
- California Univ., Livermore (USA). Lawrence Livermore Lab.
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 7329471
- Report Number(s):
- UCID-17267
- Country of Publication:
- United States
- Language:
- English
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