Numerical operator method
Algebraic solutions of difference equations - stability of sampled-data control systems - numerical method for determining transients in electric systems excited by complex signals
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Results for “DIFFERENCE EQUATION”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Computer simulation program is adaptable to industrial processes
The Reaction kinetics ablation program /REKAP/, developed to simulate ablation of various materials, provides mathematical formulations for computer programs which can simulate certain industrial processes. The programs are based on the use of nonsymmetrical difference equations that are employed to solve complex partial differential equation systems.
Schultz, F. E.↗
Digital filter synthesis program
Digital filter synthesis to form difference equations for computing differential equations
Moyer, R. A.↗
An analysis of the coupled chemically reacting boundary layer and charring ablator. Part 2 - Finite difference solution for the in-depth response of charring materials considering surface chemical and energy balances
Computer program for finite difference equation analysis of in-depth response of materials exposed to high temperature environment
Moyer, C. B.↗
On non-central chi-squared and non-central F distributions.
Differential difference equations for decision procedure risk function based on noncentral chi squared and F distributions in multivariate statistical analysis
Alam, K.↗
Identification of Linear Discrete Time Systems Using the Instrumental Variable Method.
Instrumental variable method to identify dynamic systems described by linear difference equations
Polak, E.↗
Numerical solutions of compressible and incompressible laminar separated flows.
Numerical techniques and solutions for compressible and incompressible laminar separated flows using time dependent finite difference equations
Mueller, T. J.↗
Some new rearrangement inequalities having application in stability analysis.
Rearrangement inequalities in stability analysis applied to difference equations governing nonlinear feedback loop
Brockett, R. W.↗
FORTRAN 4 program calculates velocities and streamlines in a tandem blade turbomachine
Computer program gives blade-to-blade solution of the two-dimensional, subsonic, compressible, nonviscous flow problem for a circular or straight infinite cascade of tandem or slotted turbomachine blades. The method of solution is based on the stream function using iterative solution of nonlinear finite-difference equations.
Katsanis, T.↗
Finite element formulation for linear thermoviscoelastic materials
Report presents the finite difference equations in time and finite element matrix equations in space for general linear thermovisoelastic problems. The equations are derived for a general three-dimensional body but are applicable to one- and two-dimensional configurations with minor changes.
Chen, J. C.↗
Some new rearrangement inequalities having application in stability analysis.
Rearrangement inequalities for positivity of nonquadratic transformations, discussing stability of nonlinear feedback loop described by difference equations
Brockett, R. W.↗
Axisymmetric static and dynamic buckling of spherical caps due to centrally distributed pressures.
Spherical caps axisymmetric static and dynamic buckling under load, using axisymmetric nonlinear elastic shell theory approximation and finite difference equations
Fulton, R. E.↗
On the numerical solution of degenerate linear and nonlinear elliptic boundary value problems.
Scheme for choosing approximating system of difference equations for degenerate linear and nonlinear elliptic boundary value problems
Kushner, H. J.↗
A method for transient thermal analysis of space radiators.
Transient thermal analysis of space radiators excluding finite difference equations, noting computer adaptability and time saving
Russell, L. D.↗
Transonic flow in a converging-diverging nozzle Final report
Computerized solutions to finite difference equations of motion of transonic flow in converging-diverging rocket nozzles
Prozan, R. J.↗
Axisymmetric static and dynamic buckling of spherical caps due to centrally distributed pressures
Spherical caps axisymmetric static and dynamic buckling under load, using axisymmetric nonlinear elastic shell theory approximation and finite difference equations
Fulton, R. E.↗
Recursive computation of certain derivatives - A study of error propagation
Error propagation in linear first order difference equations studied to improve accuracy of derivative recursive computation
Gautschi, W.↗
Numerical solutions of laminar separated flows
Numerical techniques and solutions for compressible and incompressible laminar separated flows using time dependent finite difference equations
Mueller, T. J.↗