Vol. 56, No. 6, 2020

Russian Journal of Nondestructive Testing

Acoustic Methods

On Interaction of Elastic Waves with “Semitransparent” Defects

N. P. Aleshin, L. Yu. Mogilner and N. V. Krysko p. 469 abstract

Resolution Improvement of Ultrasonic Signals Using Sparse Deconvolution and Variational Mode Decomposition Algorithms

Benammar Abdessalem and Chibane Farid p. 479 abstract

Looseness Detection and Assessment of Flange Type Joints Using Vibroacoustic Modulation Method

Seyed Majid Yadavar Nikravesh and Masoud Goudarzi p. 490 abstract

Radiation Methods

Analysis of the Aperture Function of the Scattering Volume of the Collimation System of the Scattering Computed Tomography of Steel Products with a Ring Detector

E. E. Zhuravskiy, D. S. Belkin, B. I. Kapranov and S. V. Chakhlov p. 506 abstract

Radio Wave Methods

Experimental Research on the Detection of Inner Defects of Bellows Based on Ground Penetrating Radar

Wu Hai-kuan, Shu Zhi-le, Liu Chang-wu, Miao Yi-chen and Liu Bao-xian p. 516 abstract

Visual and Measurement Control

Micromechanical Properties of Concrete under Freezing-Thawing Condition

B. X. Tang and R. F. Xie p. 527 abstract

Electromagnetic Methods

Study of EMI-Based Damage Type Identification in a Cracked Metallic Specimen Repaired by a Composite Patch