Time-dependent Hellmann-Feynman theorems for variational wavefunctions.
Conditions under which optimal wave functions satisfy various time-dependent Hellmann-Feynman theorems
HELLMANN-FEYNMAN THEOREM↗
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Results for “Approximation methods”
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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Effect of spacewise variations in a random load field on the response of a linear system.
Statistical properties of dynamic response of structure to random load field, examining simple deterministic loadings
APPROXIMATION METHOD↗
Electric microfield distributions in plasmas.
Electric microfields in plasma taken as system of charged particles moving in uniform neutralizing background, using approximations and Monte Carlo study
CHARGED PARTICLE↗
Variational methods and degenerate perturbation theory.
Variational methods for approximating perturbation effect on nondegenerate eigenvalue extended to degenerate case
PERTURBATION THEORY↗
On the thermodynamics and approximation theory of viscoelastic materials.
Thermodynamics and approximation theory of viscoelastic materials, developing Coleman-Noll theory, thermodynamic theory for fluids, etc
MATERIALS SCIENCE↗
Including re-entry heating in rocket engine thermal analyses.
Reentry heat flux condition transformation into specified convective coefficients and temperatures, accounting for variation of flux with wall temperature
REENTRY CONDITION↗
Magnitude of nonlinearities in collisionless magnetoplasma waves
Perturbation technique used for approximate solutions to nonlinear hydromagnetic equations of cold collisionless plasma
PERTURBATION THEORY↗
The two variable expansion procedure for the approximate solution of certain nonlinear differential equations
Two variable expansion procedure for approximate solution of nonlinear differential equations with applications to satellite orbital motion
SATELLITE ORBIT↗
Approximate analysis of a frequency-shift keyed system with uncertainty in the carrier frequency
Approximate analysis of frequency-shift keyed telemetry system with uncertainty in carrier frequency
APPROXIMATION METHOD↗
Digital communication and tracking - The mean-square approximation to the optimum cross-correlation function
Mean square approximation to optimum cross correlation function for tracking device
TRACKING SYSTEM↗
The generation of a Gaussian random process in a position parameter
Analog computer method for approximating stationary Gaussian random process depending only on position parameter
RANDOM PROCESS↗
Simultaneous estimation by partial totals for compartmental models
Simultaneous estimation procedure for parameters in multiple equation regression model
REGRESSION ANALYSIS↗
On the symmetrical deformation of an orthotropic toroidal shell
Solution for symmetrical deformation problem of orthotropic toroidal shell
TOROIDAL SHELL↗
Vibrations of shallow spherical shells
Approximate solutions to transverse vibrations in shallow spherical shells
APPROXIMATION METHOD↗
Approximate calculation of linked thick cylindrical shells and plates
Approximate calculation of linked thick circular plates and cylindrical shells
CYLINDRICAL SHELL↗
Approximate solutions of several problems of stress concentration about holes in isotropic and orthotropic shells
Approximate solutions of stress concentration about holes in isotropic and orthotropic shells
ORTHOTROPIC SHELL↗
Cylindrical radiator with internal heat rejection
Size and temperature approximation analysis of cylindrical radiator with internal heat rejection use for SNAP-8
HEAT REJECTION DEVICE↗
On the construction of discrete approximations to linear differential expressions
Algorithm for generating discrete approximations in terms of ordinates for linear differential expressions
DIFFERENTIAL EQUATION↗