Search results for: ARC FITTING

• New Approach to Arc Fitting for Railway Track Realignment

  Publication

  • S. Cellmer
  • J. Rapiński
  • M. Skala
  • K. Palikowska

  - JOURNAL OF SURVEYING ENGINEERING-ASCE - Year 2015

  This article presents a new method of arc fitting for railway track realignment. The theoretical foundations are presented, along with a detailed algorithm of the iterative computational process. This method is based on solving a set of linearized pseudo-observation equations. The formulas of the functional model of the fitting problem were derived, and a special form of objective function is proposed. An iterative method for optimization...

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• Superconductivity in the intermetallic compound Zr5Al4

  Publication

  • Z. Ryżyńska
  • M. J. Winiarski
  • W. Xie
  • R. Cava
  • T. Klimczuk

  - EPL-EUROPHYS LETT - Year 2019

  Polycrystalline Zr5Al4 was synthesized using the arc-melting method. Powder X-ray diffraction confirms the previously reported crystal structure of the Ti5Ga4-type P63/mcm with lattice parameters: a = 8.4312(6) A , and c = 5.7752(8) A . Electrical resistivity and low-temperature magnetic susceptibility measurements indicate that Zr5Al4 exhibits superconducting behavior below 2 K. The normalized heat capacity jump at Tc= 1.82 K...

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