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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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Application of polynomial-smoothing formulas and related derivative-estimating formulas simplifies certain linear least-squares problems. These problems can then be solved by a computer method.
Algorithm, based on the Borel method of summing divergent sequences, is used for smoothing noisy data where knowledge of frequency content is not required. Technique's effectiveness is demonstrated by a series of graphs.
Solution smoothness of Volterra integral equations with weakly singular kernels
Smooth empirical Bayes estimation with application to Weibull distribution
Comparison of cord loads with aircraft tire on grooved and smooth runway surfaces
Surface smoothness foucaultgrams of large astronomical mirrors
Variable time constant, wide frequency range smoothing network for noise removal from pulse chains
Application of generalized exponential smoothing and matrix pseudoinverses to estimation in dynamic systems
Relationship between noisy drift, corrective drift, and smooth pursuit eye movements
Pesinogens A, C and D from stomach mucosae of smooth dogfish separated by chromatography on DEAE cellulose
Kalman-Bucy filtering for estimating initial conditions and smoothing problems in linear dynamic systems, applicable to rectilinear motion of randomly accelerated spacecraft
Manual of computer program for probabilistic optimal launch vehicle assignment and budget smoothing model
Low wing loading STOL transport ride smoothing using Boeing aircraft
Nongray absorption and radiation cooling on smooth symmetric blunt bodies included in modified Maslen flow field method for radiation and large blowing
Nonactomyosin component differentiation in potassium chloride insoluble myofilaments in vertebrate smooth muscle cells
Thermal contact conductance test data at high vacuum were obtained from two Armco iron specimens having smooth, large radii of curvature, convex, one-half wave length surfaces. The data are compared with calculations based on two macroscopic elastic deformation theories and an empirical expression. Major disagreement with the theories and fair agreement with the empirical expression resulted. Plastic deformation of all the contacting surfaces was verified from surface analyzer statistics. These results indicate that the theoretical assumption of macroscopic elastic deformation is inadequate for accurate prediction of heat transfer with light loads for Armco iron specimens similar to those used in this investigation.
Locally nonsimilar solutions for nongray radiating shock layers about smooth axisymmetric bodies have been obtained based on a newly developed approximate method. Good agreement is found with numerical solutions for inviscid cases (both radiating and nonradiating) and with series solutions for the radiating viscous case. For the inviscid case, the effect of radiative cooling is to destroy the entropy layer; at a distance far from the stagnation point, the shock layer is nearly isothermal. For the viscous case, the radiative wall flux approaches that of the inviscid case at a distance far downstream of the stagnation point. The method can also treat surface mass injection.
A smooth empirical Bayes estimator was developed for estimating the unknown random scale component of each of a set of observation error variances. It is shown that the estimator possesses a smaller average squared error loss than other estimators for a discrete time linear system.