SEARCH · Engineering Papers
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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Application of transformation groups to solution of partial differential equations
Modified Fourier transform for calculating human operator describing functions
Integral transformations used in time variable parameter estimation
Velocity synchronized Fourier transform hologram camera system
Transformer of closely spaced pulsed waveforms having nonzero average value
Transform processing and image coding
Modified admittance yielding Kubo admittance at nonzero frequencies, discussing transformation of correlations of Ising model
Passive circuit to transform voltage of indefinitely repeated positive or negative pulses using transistors, diodes and magnetic cores
Optical imaging systems achieving aperture synthesis by lensless Fourier transform holography, noting X ray astronomy, ultrasonic and space applications
Canonical transformation and Hamilton-Jacobi theories applied to space vehicle trajectory analysis, discussing elliptical coast arc and optimal low thrust problems
Image deblurring and aperture synthesis using a posteriori processing by Fourier transform holographic spatial filtering
Transformer for unilateral energy transfer using single domain uniaxial Permalloy film
Motion-distorted photograph deblurring method using extended range holographic Fourier transform division
Slack variable to transform optimal control problem with scalar inequality constraint on state variables into unconstrained problem of higher dimension
Computer program designs transformers which have one primary /center tap permissible/ and up to 20 untapped secondaries, and which can handle up to 500 V across any one winding. Computer determines total secondary power, core type, primary turns, secondary turns, and wire sizes for primary and secondary windings.
FORTRAN programs giving coordinate transformations of ecliptic, galactic, and equatorial systems
Direct and cross power spectral density estimation of discrete data using fast Fourier transform with digital filter solution
Range transformation of activation curves for metal foils and application to charged particle activation analysis in determining trace elements