The probability of a straight-line sequence from a uniform independent sample source.
Computation method for probability of straight line sequence from uniform data sample sources, noting constraints due to compression algorithm
Lynch, T. J.↗
SEARCH · Engineering Papers
Results for “Computational methods”
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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Computation and analysis
Direct summation of series involving higher transcendental functions, integrals of confluent hypergeometric functions, and computer methods for approximating continuous functions
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Computer program to predict heat transfer through glass.
Thermal behavior of space vehicle window systems predicted by mathematical analysis and computer methods for heat transfer through glass
Comstock, D. F.↗
On computing generalized inverses.
Generalized inverse of matrix computation method, using elementary orthogonal matrices and Gaussian elimination
Tewarson, R. P.↗
Polynomial-smoothing and derivative-estimating formulas for functions of one or two independent variables
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.
Semtner, A. J.↗
A study of the plane stress or strain finite element analysis for solution of stress distribution in plane elastic continua
Finite element method computer program for solution of stress distribution in plane elastic continua
Helbing, T. C.↗
Some comments on the solution of linear equations
Computational methods of homogeneous ill- conditioned and singular simultaneous linear equations
Ramnath, B.↗
Analysis of irrational transfer functions for distributed-parameter systems
Algorithmic and digital computer method for approximating irrational transfer functions by rational functions in control systems
Chen, C.-F.↗
An embodiment of some vertebrate command and control principles
Reticular formation of central nervous system in vertebrates described as behavior controlling circuit of interconnected modules, proposing hybrid computer method for operational scheme
Blum, J.↗
The impact of the computer on shell analysis
Thin walled shells structural vibration, buckling and stress analysis by computer methods, discussing shell theory and design
Stein, M.↗
Performance of a ten-stage electrostatic depressed collector for klystrons
Computational method for determining performance of ten stage electrostatic depressed collector for klystrons
Mihran, T. G.↗
On the Reduction of Proliferation of Finite Element Programs
Reduction of proliferation and maintainability of finite element method computer programs
Butler, T. G.↗
Computations with sparse matrices
Sparse matrices inverses and eigenvectors computation methods, giving bibliography
Tewarson, R. P.↗
COMAD - Application to future manned space vehicles
Computer methods for automatic diagnosis program applied to future manned space vehicles, discussing cost relationship to fault isolation techniques and component reliability
Garzia, R. F.↗
Identification of boiler inlet transfer functions and estimation of system parameters
An iterative computer method is described for identifying boiler transfer functions using frequency response data. An objective penalized performance measure and a nonlinear minimization technique are used to cause the locus of points generated by a transfer function to resemble the locus of points obtained from frequency response measurements. Different transfer functions can be tried until a satisfactory empirical transfer function of the system is found. To illustrate the method, some examples and some results from a study of a set of data consisting of measurements of the inlet impedance of a single tube forced flow boiler with inserts are given.
Miles, J. H.↗
Convection in the tanks of a rotating spacecraft
A general study of convection and mixing of a stratified fluid in a rotating container is described, with application to the special problem of fluid heating and convection in a spacecraft tank. The analysis was based on a set of approximate equations for the Navier-Stokes description of fluid convection with small density variations in a rotating system, including effects of body forces due to temperature stratification (caused by a heater) and arbitrary time-dependent rotation of the tank about a noncentral axis. An efficient numerical finite difference scheme and computational method are described for the convection of vorticity and energy in a two-dimensional tank. Special procedures were developed for analysis of the thermodynamic states resulting from the approximate flow equations derived for small density variations. Results of the numerical simulation are presented for studying the effectiveness of rotation maneuvers in mixing stratified oxygen in the tanks of an Apollo spacecraft. Significant effects of the rotation maneuvers are discussed, including the reduction of the potential for pressure collapse.
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Numerical solution for propagation of coupled longitudinal and transverse waves normal to the applied magnetic field in a three-fluid medium.
The solution was obtained without approximating the dispersion relation. This was made possible by the use of a computer method for carrying out the extremely large number of algebraic manipulations involved. The three-fluid model employed accounts for the interaction of the electron, ion, and neutral species. The solution for the e-folding distance describes the damping characteristics of each wave mode. Each of the e-folding solutions corresponds to one of the phase velocity solutions.
Mcclendon, R. W.↗
Effects of circular geometry in simulation of convection in rotating spacecraft tanks
For computational simulation of the convection and mixing of stratified fluid in a rotating tank (such as used in Apollo flights) with time-dependent rotation, the Navier-Stokes convection problem was formulated for a circular tank configuration. The final equations results from a general approximate theory for combined forced and contained natural convection in a time-dependent rotating system. The equations are cast in terms of vorticity and stream function in a form convenient for computation, with a transformed coordinate system, and appropriate boundary conditions are derived. Accurate representations for the cryogenic supercritical oxygen thermodynamic properties are used in the computations, and an efficient numerical finite difference scheme and computational method are employed.
Martin, E. D.↗