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There are a total of 2126 record(s) matching your query.
Sorted by: Date Added To NTRS in Descending order
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The use of the QR factorization in the partial realization problem
Author(s): Verhaegen, M. H.
Abstract: The use of the QR factorization of the Hankel matrix in solving the partial realization problem is analyzed. Straightforward use of the QR factorization results in a realization scheme that possesses all of the computational ...
NASA Center: Ames Research Center
Publication Year: 1987
Added to NTRS: 2005-10-13
Accession Number: 87N30133; Document ID: 19870020700; Report Number: A-87316, NAS 1.15:100018, NASA-TM-100018
A method for data base management and analysis for wind tunnel data
Author(s): Biser, Aileen O.
Abstract: To respond to the need for improved data base management and analysis capabilities for wind-tunnel data at the Langley 16-Foot Transonic Tunnel, research was conducted into current methods of managing wind-tunnel data and a ...
NASA Center: Langley Research Center
Publication Year: 1987
Added to NTRS: 2005-10-13
Accession Number: 87N18331; Document ID: 19870008898; Report Number: L-16198, NAS 1.15:89038, NASA-TM-89038
Evaluation of Navier-Stokes and Euler solutions for leading-edge separation vortices
Author(s): Fujii, K.; Gavali, S.; Holst, T. L.
Abstract: Extensive study on the numerical simulation of the vortical flow over a double delta wing is carried out using the thin layer Navier-Stokes and Euler equations. Two important flow characteristics, vortex interaction and ...
NASA Center: Ames Research Center
Publication Year: 1987
Added to NTRS: 2005-10-13
Accession Number: 87N23584; Document ID: 19870014151; Report Number: A-87202, NAS 1.15:89458, NASA-TM-89458
Retrieval of upper atmosphere pressure-temperature profiles from high resolution solar occultation spectra
Author(s): Rinsland, C. P.; Russell, J. M., III; Park, J. H.; Namkung, J.
Abstract: Pressure-temperature profiles over the 18 to 75 km altitude range were retrieved from 0.01 cm(-1) resolution infrared solar absorption spectra recorded with the Atmospheric Trace Molecule Spectroscopy (ATMOS) Fourier ...
NASA Center: Langley Research Center
Publication Year: 1987
Added to NTRS: 2005-10-13
Accession Number: 87N24858; Document ID: 19870015425; Report Number: NAS 1.15:89160, NASA-TM-89160
Eigensystem analysis of classical relaxation techniques with applications to multigrid analysis
Author(s): Lomax, Harvard; Maksymiuk, Catherine
Abstract: Classical relaxation techniques are related to numerical methods for solution of ordinary differential equations. Eigensystems for Point-Jacobi, Gauss-Seidel, and SOR methods are presented. Solution techniques such as ...
NASA Center: Ames Research Center
Publication Year: 1987
Added to NTRS: 2005-10-13
Accession Number: 87N20785; Document ID: 19870011352; Report Number: A-86432, NAS 1.15:88377, NASA-TM-88377
Automated acoustic intensity measurements and the effect of gear tooth profile on noise
Author(s): Atherton, William J.; Pintz, Adam; Lewicki, David G.
Abstract: Acoustic intensity measurements were made at NASA Lewis Research Center on a spur gear test apparatus. The measurements were obtained with the Robotic Acoustic Intensity Measurement System developed by Cleveland State ...
NASA Center: NASA (non Center Specific)
Publication Year: 1987
Added to NTRS: 2005-10-13
Accession Number: 87N28917; Document ID: 19870019484; Report Number: AD-A184071, AVSCOM-TR-87-C-24, E-3718, NAS 1.15:100155, NASA-TM-100155
A computer controlled signal preprocessor for laser fringe anemometer applications
Author(s): Oberle, Lawrence G.
Abstract: The operation of most commercially available laser fringe anemometer (LFA) counter-processors assumes that adjustments are made to the signal processing independent of the computer used for reducing the data acquired. Not ...
NASA Center: Glenn Research Center
Publication Year: 1987
Added to NTRS: 2005-10-13
Accession Number: 87N20516; Document ID: 19870011083; Report Number: E-3452, NAS 1.15:88982, NASA-TM-88982
Evaluation of industrial platinum resistance thermometers
Author(s): Daryabeigi, Kamran; Dillontownes, Lawrence A.; Alderfer, David W.
Abstract: The calibration and stability of four surface temperature measuring industrial platinum resistance thermometers for use in the temperature range -120 C to 160 C was investigated. It was found that the calibration formulation ...
NASA Center: Langley Research Center
Publication Year: 1987
Added to NTRS: 2005-10-13
Accession Number: 87N28885; Document ID: 19870019452; Report Number: NAS 1.15:100491, NASA-TM-100491
Improved VAS regression soundings of mesoscale temperature structure observed during the 1982 atmospheric variability experiment
Author(s): Chesters, Dennis; Keyser, Dennis A.; Larko, David E.; Uccellini, Louis W.
Abstract: An Atmospheric Variability Experiment (AVE) was conducted over the central U.S. in the spring of 1982, collecting radiosonde date to verify mesoscale soundings from the VISSR Atmospheric Sounder (VAS) on the GOES satellite. ...
NASA Center: Goddard Space Flight Center
Publication Year: 1987
Added to NTRS: 2005-10-13
Accession Number: 87N28576; Document ID: 19870019143; Report Number: NAS 1.15:100679, NASA-TM-100679, REPT-87B-0438
Referencing in fiber optic sensing systems
Author(s): Adamovsky, Grigory
Abstract: Different techniques to account for losses induced by the environment on signals in intensity modulation fiber optic sensing systems are described and analyzed.
NASA Center: Glenn Research Center
Publication Year: 1987
Added to NTRS: 2005-10-13
Accession Number: 87N20475; Document ID: 19870011042; Report Number: E-3468, NAS 1.15:89822, NASA-TM-89822
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