Strain field determination using displacement gradient model and unified least-squares technique
نویسندگان
چکیده
منابع مشابه
Simultaneous spectrophotometric determination of lead, copper and nickel using xylenol orange by partial least squares
A partial least squares (PLS) calibration model was developed for the simultaneous spectrophotometricdetermination of Pb (ΙΙ), Cu (ΙΙ) and Ni (ΙΙ) using xylenol orange as a chromogenic reagent. The parameterscontrolling behavior of the system were investigated and optimum conditions were selected. The calibrationgraphs were linear in the ranges of 0.0–9.091, 0.0–2.719 and 0.0–2.381 ppm for lead...
متن کاملDisplacement Preconditioner for Toeplitz Least Squares Iterations
We consider the solution of least squares problems min ||b − Ax||2 by the preconditioned conjugate gradient (PCG) method, for m × n complex Toeplitz matrices A of rank n. A circulant preconditioner C is derived using the T. Chan optimal preconditioner for n × n matrices using the displacement representation of AA. This allows the fast Fourier transform (FFT) to be used throughout the computatio...
متن کاملGradient methods and conic least-squares problems
This paper presents two reformulations of the dual of the constrained least squares problem over convex cones. In addition, it extends Nesterov’s excessive gap method 1 [21] to more general problems. The conic least squares problem is then solved by applying the resulting modified method, or Nesterov’s smooth method [22], or Nesterov’s excessive gap method 2 [21], to the dual reformulations. Nu...
متن کاملUnified LASSO Estimation via Least Squares Approximation
We propose a method of least squares approximation (LSA) for unified yet simple LASSO estimation. Our general theoretical framework includes ordinary least squares, generalized linear models, quantile regression, and many others as special cases. Specifically, LSA can transfer many different types of LASSO objective functions into their asymptotically equivalent least-squares problems. Thereaft...
متن کاملGALS – Gradient Analysis by Least Squares
We present a method, GALS (Gradient Analysis by Least Squares) for estimating the gradient of a physical field from multi-spacecraft observations. To obtain the best possible spatial resolution, the gradient is estimated in the frame of reference where structures in the field are essentially locally stationary. The estimates are refined iteratively by a least squares method. We show that GALS i...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Scientific Research and Essays
سال: 2016
ISSN: 1992-2248
DOI: 10.5897/sre2015.6377