Approximating properties of linear models for input output descriptions
Pade approximations for linear and dynamic programming using Markov processes and new algorithms
Holzmann, E. G.↗
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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 operating parameters on net power output of a 2- to 10-kilowatt Brayton rotating unit
Performance of turbine-compressor-alternator Brayton cycle unit for space electric power generation
Evans, R. C.↗
Optimal filter design subject to output sidelobe constraints
Optimal pulse compression time-invariant filter for signal reception with sidelobe constraints under white noise in radar and communications systems
Athans, M.↗
Laser wavelength selection and output coupling by a grating
Gratings as laser wavelength-selective end reflectors, noting application to carbon dioxide and dye lasers
Hard, T. M.↗
Dual-channel circuit conditions/amplifies transducers' inputs and outputs
Circuit includes two data channels and one shared precision power supply installed on a single 11.4 cm square circuit card. The unit is relatively inexpensive, compact, and suitable for most tests where low-noise and high-gain signal processing is required.
Murphy, K. M.↗
A lightweight, high output soil sampler
Sampler is useful on or under earth's surface or on sea bottom. Larger sample amount is obtained relative to sampler size and weight and limited particle size sample material is continuously delivered. Silicone rubber linear in transport tube nearly eliminates grinding or particulate processing during sampling, and reduces required torque.
Howard, E. A.↗
An efficient, broad-band, switching-mode amplifier with isolated output, part 2 Annual report
Breadboard model of broadband pulse width modulated amplifier
Dunmyer, W. D.↗
Vibrating element electrometer with output signal magnified over input signal by a function of the mechanical Q of the vibrating element Patent
Vibrating element electrometer producing high conversion gain by input current control of elements resonant frequency displacement amplitude
Coon, G. W.↗
Solid state pulse generator with constant output width, for variable input width, in nanosecond range Patent
Development and characteristics of single or doubl pulse generator which produces constant width pulses in nanosecond region
Garrahan, N. M.↗
Passive synchronized spike generator with high input impedance and low output impedance and capacitor power supply Patent
Pulse generator for synchronizing or resetting electronic signals without requiring separate external source
Cancro, C. A.↗
A review of the output performance of six planar thermionic converters with various electrode materials
Performance evaluation of planar thermionic converters having various electrode materials
Wilson, V. C.↗
Development and evaluation of an impedance cardiographic system to measure cardiac output and other cardiac parameters Final progress report 1 Jul. 1969 - 31 Dec. 1970
Performance of impedance cardiograph for measuring heart rate and body fluids
From, A. H. L.↗
Constant frequency output two stage induction machine systems Patent
Double-induction variable speed system for constant-frequency electrical power generation
Riaz, M.↗
Output signal-to-noise ratio of an FM discriminator with nonideal limiting
FM discriminator with nonideal limiting, calculating signal to noise ratio under white Gaussian noise input
Refi, J. J.↗
An analysis of the phase coherent-incoherent output on the bandpass limiter
Signal mean and noise variance as direct functions of phase angle between signal component passed by bandpass limiter and coherent reference
Simon, M. K.↗
Part 1: Classical laser. Part 2: The effect of velocity changing collisions on the output of a gas laser
A classical model for laser action is discussed, in which an active medium consisting of anharmonic oscillators interacts with an electromagnetic field in a resonant cavity. Comparison with the case of a medium consisting of harmonic oscillators shows the significance of nonlinearities for producing self-sustained oscillations in the radiation field. A theoretical model is presented for the pressure dependence of the intensity of a gas laser, in which only velocity-changing collisions with foreign gas atoms are included. A collision model for hard sphere, repulsive interactions was derived. Collision theory was applied to a third-order expansion of the polarization in powers of the cavity electric field (weak signal theory).
Borenstein, M.↗
Design of minimax output feedback controller for system with parameter uncertainty
The problem of controlling a time-invariant system with parameter uncertainty is considered with incomplete state feedback. The controller is designed by minimaximizing a quadratic performance criterion and a sensitivity (or loss) criterion, involving the state of the system, the control, and the uncertainty vector. The resulting optimal controller is linear and optimal feedback gain matrix must satisfy a set of nonlinear algebraic equations. some algorithms for algebraic minimax problems are presented.
Basuthakur, S.↗
Effect of velocity-changing collisions on the output of a gas laser.
A theoretical model for the pressure dependence of the intensity of a gas laser is presented in which only velocity-changing collisions with foreign-gas atoms are included. This is a special case where the phase shifts are the same for the two atomic-laser levels or are so small that deflections are the dominant effect of collisions. A collision model for hard-sphere repulsive interactions is derived and the collision parameters, persistence of velocity and collision frequency, are assumed to be independent of velocity. The collision theory is applied to a third-order expansion of the polarization in powers of the cavity electric field (weak-signal theory). The resulting expression for the intensity shows strong pressure dependence. The collisions reduce the amount of saturation and the laser intensity increases with pressure in a characteristic fashion.
Borenstein, M.↗