Contents

Russian Journal of Nondestructive Testing

Vol. 55, No. 6, 2019

Acoustic Methods

Structure Analysis of Products Made of Polymer Materials Using Instantaneous Spectra of Ultrasonic Signals

V. K. Kachanov, I. V. Sokolov, V. V. Pervushin and D. V. Timofeev p. 427  abstract

Nondestructive Testing of Structurally Inhomogeneous Composite Materials by the Method of Elastic-Wave Velocity Hodograph

A. I. Potapov, A. V. Kondrat’ev and Ya. G. Smorodinskii p. 434  abstract

Using “Focusing to a Point” Algorithm for Reference-Free Measurement of the Speed of Ultrasound in Tomography of Concrete Engineering Structures

V. K. Kachanov, I. V. Sokolov, R. V. Kontsov and D. V. Timofeev p. 443  abstract

Inverse Problems of Ultrasonic Tomography in Nondestructive Testing: Mathematical Methods and Experiment

E. G. Bazulin, A. V. Goncharsky, S. Yu. Romanov and S. Yu. Seryozhnikov p. 453  abstract

Reference-Free Method for Thickness Gaging of a Test Object and Measuring the Speed of Longitudinal and Transverse Waves in It Based on Echo Signals Picked by an Antenna Array

E. G. Bazulin and A. Kh. Vopilkin p. 463  abstract

Design of a Portable Frame Integrality Testing System Based on SOPC

Zhiyi Han, Xin Zhao and Lu Yang p. 476  abstract

Radiation Methods

Computer Aided Radiograph Interpretation Tool for Defect Characterization from Weld Plates

K. Sudheera and N. M. Nandhitha p. 481  abstract