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  • 1
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    An initial feasibility stage for Stoer's constrained least squares algorithm (1975)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A procedure is described for computing an initial feasible vector, x sub 0, for Stoer's algorithm for solving the linear least squares problem subject to linear equality and inequality constraints. The procedure described fits well with Stoer's algorithm since much of the computation performed to determine x sub 0 accomplishes initializing transformations of the problem data, which would otherwise be done in Stoer's algorithm after being given an x sub 0.
    Keywords: NUMERICAL ANALYSIS
    Type: NASA-CR-142189 , JPL-TM-33-724
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    C super 1: Compatible interpolation over a triangle (1976)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: An elementary derivation and a complete description is given of an algorithm for interpolation over a plane triangle when function values and first partial derivatives are given at the vertices. The method gives C1 continuity with neighboring triangles. The interpolation method is mathematically equivalent to one that has been discussed previously in the literature; however, the algorithmic form given here is more efficient than has previously been described.
    Keywords: NUMERICAL ANALYSIS
    Type: NASA-CR-147946 , JPL-TM-33-770
    Format: application/pdf
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  • 3
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    Integrals of a C-1-compatible triangular surface element (1976)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Definite integrals are evaluated for the cardinal functions of an interpolation method which provides C sup 1 continuity over a triangular grid.
    Keywords: NUMERICAL ANALYSIS
    Type: NASA-CR-149277 , JPL-TM-33-808
    Format: application/pdf
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  • 4
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    The covariance matrix for the solution vector of an equality-constrained least-squares problem (1976)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Methods are given for computing the covariance matrix for the solution vector of an equality-constrained least squares problem. The methods are matched to the solution algorithms given in the book, 'Solving Least Squares Problems.'
    Keywords: NUMERICAL ANALYSIS
    Type: NASA-CR-149232 , JPL-TM-33-807
    Format: application/pdf
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  • 5
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    On some recent advances in multidisciplinary analysis of hypersonic vehicles (1992)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: This paper presents pertinent details of the development and application of an integrated, multidisciplinary finite element analysis tool for the effective modeling and simulation of aerospace vehicles including hypersonic ones. Recent advances in this connection include more efficient CFD solution techniques and also aeroservoelastic stability analysis methods that employ unsteady aerodynamic forces for computation of flutter and divergence speeds. An accelerated Euler solution procedure based on the Aitken acceleration technique has recently been implemented that effects considerable improvement in solution efficiency for the same level of solution accuracy, as evidenced by example problems presented in the paper. A summary of finite element numerical formulations for the various individual disciplines as well as for the unified aeroservoelastic analysis and some relevant numerical examples are also presented in the paper.
    Keywords: NUMERICAL ANALYSIS
    Type: AIAA PAPER 92-5026 , ; 9 p.|AIAA, International Aerospace Planes Conference; Dec 01, 1992 - Dec 04, 1992; Orlando, FL; United States
    Format: text
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