Thermal diffusion in almost Lorentzian mixtures.
Approximation method for thermal diffusion factor of almost Lorentzian gas mixture with better convergence properties than Chapman-Enskog approximation
GAS MIXTURE↗
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Results for “MIXTURES”
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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Time-dependent Ising-model description of binary liquid mixtures.
Time dependent Ising-model description of binary liquid mixture near critical temperature
APPROXIMATION METHOD↗
Orientation relaxation in symmetrical-top gases and binary gas mixtures.
Orientation relaxation in symmetrical-top gases and binary gas mixtures, noting prediction of cross sections from kinetic theory data for molecules
BINARY MIXTURE↗
Detonability of hydrogen-oxygen mixtures in large vessels at low initial pressures.
Detonability of hydrogen-oxygen mixtures in large vessels at low initial pressures, using strong and weak igniters
DETONATION WAVE↗
Kinetic theory of bimolecular chemical reaction, diffusive drag, and other processes in a gas mixture
Kinetic theory of bimolecular chemical reaction and diffusive drag in gas mixtures
CHEMICAL REACTION↗
The centered one-dimensional unsteady expansion of a vibrationally relaxing nitrogen-oxygen mixture
Centered one-dimensional unsteady expansion of vibrationally relaxing nitrogen-oxygen mixture
GAS EXPANSION↗
Calculation of the centered one-dimensional unsteady expansion of a reacting gas mixture subject to vibrational and chemical nonequilibrium
Centered one-dimensional unsteady expansion calculated for reacting gas mixture subject to vibrational and chemical nonequilibrium
ONE-DIMENSIONAL FLOW↗
Isentropic flow solutions for reacting gas mixtures in thermochemical equilibrium
Isentropic flow solutions for reacting gas mixtures in thermochemical equilibrium
THERMOCHEMISTRY↗
Flammability limits of hydrogen-oxygen-nitrogen mixtures at low pressures.
Flammability limits of hydrogen-oxygen-nitrogen mixtures at low pressures
FLAME PROPAGATION↗
Experimental and theoretical investigations of the chemical kinetics and nonequilibrium CN RADIATION behind shock waves in CO sub 2 - N sub 2 mixtures.
Martian entry condition analyzed as nonequilibrium flow field phenomenon, noting chemical kinetics and radiation behind shock wave in gas mixtures
SHOCK WAVE↗
Alpha-aminonitriles formed by an electric discharge through a mixture of anhydrous methane and ammonia.
Alpha aminonitriles formation by electric discharge through anhydrous methane and ammonia mixture, showing hyrolysis to amino acid as possible bearing on chemical evolution
ORGANIC COMPOUND↗
Measurement of shock-wave structure in helium- argon mixtures.
Helium argon mixture shock wave density profile measurements, discussing shock wave production in flow field at supersonic nozzle exit
DENSITY MEASUREMENT↗
Correlation of Mixture Temperature Data Obtained from Bare Intake-manifold Thermocouples
A relatively simple equation has been found to express with fair accuracy, variation in manifold-charge temperature with charge in engine operating conditions. This equation and associated curves have been checked by multi cylinder-engine data, both test stand and flight, over a wide range of operating conditions. Average mixture temperatures, predicted by the equations of this report, agree reasonably well with results within the same range of carburetor-air temperatures from laboratories and test stands other than the NACA.
ENGINES-PRATT & WHITNEY R-1830-75 (AMER )↗
Improving Mixture Analysis Estimates of Snow-Covered-Area from AVIRIS Data
A technique was developed to improve spectral mixture analysis estimates of snow-covered-area in alpine regions through the use of multiple snow endmembers.
spectral mixture analysis alpine regions snow refl↗
Early Season Large-Area Winter Crop Mapping Using MODIS NDVI Data, Growing Degree Days Information and a Gaussian Mixture Model
Knowledge on geographical location and distribution of crops at global, national and regional scales is an extremely valuable source of information applications. Traditional approaches to crop mapping using remote sensing data rely heavily on reference or ground truth data in order to train/calibrate classification models. As a rule, such models are only applicable to a single vegetation season and should be recalibrated to be applicable for other seasons. This paper addresses the problem of early season large-area winter crop mapping using Moderate Resolution Imaging Spectroradiometer (MODIS) derived Normalized Difference Vegetation Index (NDVI) time-series and growing degree days (GDD) information derived from the Modern-Era Retrospective analysis for Research and Applications (MERRA-2) product. The model is based on the assumption that winter crops have developed biomass during early spring while other crops (spring and summer) have no biomass. As winter crop development is temporally and spatially non-uniform due to the presence of different agro-climatic zones, we use GDD to account for such discrepancies. A Gaussian mixture model (GMM) is applied to discriminate winter crops from other crops (spring and summer). The proposed method has the following advantages: low input data requirements, robustness, applicability to global scale application and can provide winter crop maps 1.5-2 months before harvest. The model is applied to two study regions, the State of Kansas in the US and Ukraine, and for multiple seasons (2001-2014). Validation using the US Department of Agriculture (USDA) Crop Data Layer (CDL) for Kansas and ground measurements for Ukraine shows that accuracies of greater than 90% can be achieved in mapping winter crops 1.5-2 months before harvest. Results also show good correspondence to official statistics with average coefficients of determination R(exp. 2) greater than 0.85.
mixture model↗
Mixture Models and the Segmentation of Multimodal Textures
A problem of using mixture-of-Gaussian models for unsupervised texture segmentation is that multimodal textures cannot be well represented by a single Gaussian cluster.
texture↗
A Modified Linear-MIxing Method for Calculating Atmospheric Path Radiances of Aerosol Mixtures
The top-of-atmosphere (TOA) path radiance generated by an aerosol mixture can be synthesized by linearly adding the contributions of the individual aerosol components, weighted by their fractional optical depths. The method, known as linear mixing, is exact in the single-scattering limit.
top-of-atmosphere↗
Mapping Chaparral in the Santa Monica Mountains Using Multiple Endmember Spectral Mixture Models
A new technique, called multiple endmember spectral mixture analysis (MESM) was developed and tested in the Santa Monica Mountains, using Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) data acqired in the fall of 1994 to map California chaparral.
multiple↗