A spectral line inversion code, Very Fast Inversion of the Stokes Vector (VFISV), has been used since May 2010 to infer solar atmospheric parameters from spectropolarimetric observations taken by Helioseismic and Magnetic Imager (HMI) aboard Solar Dynamics Observatory (SDO). The magnetic filling factor, fraction surface with a resolution element occupied field, is set have constant value one in...

A new method to fit specific types of conics to scattered data points is introduced. Direct, specific fitting of ellipses and hyperbolæ is achieved by imposing a quadratic constraint on the conic coefficients, whereby an improved partitioning of the design matrix is devised so as to improve computational efficiency and numerical stability by eliminating redundant aspects of the fitting procedur...

The Soleil–Babinet compensator (SBC) is a variable retarder and has been used in variety of application fields. A scheme based on the vectorial optical field proposed to calibrate SBC by transforming change phase retardation into visible rotation petal-like pattern. relationship between angle pattern established theoretically. In experiment, vector beam generated using spiral plate (SPP) modifi...

‎Several modifications of the Laplace distribution have been introduced and applied in various fields up to this day‎. ‎In this paper‎,  ‎we introduce a modified symmetric version of the classical Laplace distribution‎.  ‎We provide a comprehensive theoretical description of this distribution‎. ‎In particular‎, ‎we derive the formulas for th...

abstract spi is based on fitting a gamma distribution to precipitation amounts in selected periods. based on current research, the gamma distribution may not be fitted to annual precipitation of some regions. in order to evaluate this subject, annual precipitation have been used during 1958- 2007 at 11 synoptic stations in iran. in first step, values of spi and frequency of different classes of...

This paper presents the modeling of high speed distributed networks characterized by S-parameters frequency data using rational Krylov fitting (RKFIT) algorithm. Numerical examples illustrate effectiveness method to compute stable approximation that fit given data. In addition, it is shown RKFIT has some advantages when compared well-established Vector Fitting (VF) method, such as more accurate...