Acoustic signal characteristics of underwater spark discharge with different electrode configurations

This paper study the acoustic signal characteristics of coal and rock mass under uniaxial compression by the tests of acoustic emission(AE),which obtain the variation of AE counts and energy.Compressing on original data use wavelet analysis,and extracting the characteristics of signal with the wavelet sym-basis,then decomposing and remodeling the wavelet coefficients,the negative singularity degree indicators of adjacent scales can be got.The results showed that the wavelet transform modulus maximum used to identify the negative singularity degree can achieve the position of the frequency changes point of the acoustic signal,which is of certain guiding significance for prediction of the uniaxial compression process.

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Vibration and acoustic signal characteristics of solid particles carried in sand-water two-phase flows

Powder Technology ◽

10.1016/j.powtec.2018.12.092 ◽

2019 ◽

Vol 345 ◽

pp. 159-168 ◽

Cited By ~ 8

Author(s):

Kai Wang ◽

Gang Liu ◽

Yichen Li ◽

Min Qin ◽

Jinbang Wang ◽

...

Keyword(s):

Acoustic Signal ◽

Solid Particles ◽

Two Phase Flows ◽

Two Phase ◽

Signal Characteristics

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Regulation of Biological Processes with Complexions of Metals Produced by Underwater Spark Discharge

Springer Proceedings in Physics - Nanooptics and Photonics, Nanochemistry and Nanobiotechnology, and Their Applications ◽

10.1007/978-3-030-52268-1_23 ◽

2020 ◽

pp. 283-306

Author(s):

Anatoly Veklich ◽

Tetiana Tmenova ◽

Oksana Zazimko ◽

Valentyna Trach ◽

Kostyantin Lopatko ◽

...

Keyword(s):

Spark Discharge ◽

Biological Processes ◽

Underwater Spark Discharge

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Third Paper: Comparison of the Behaviour of Different Sheet Materials Formed by the Underwater Spark Discharge Method

Proceedings of the Institution of Mechanical Engineers ◽

10.1243/pime_proc_1964_179_020_02 ◽

1964 ◽

Vol 179 (1) ◽

pp. 234-239 ◽

Cited By ~ 3

Author(s):

J. L. Duncan ◽

W. Johnson

Keyword(s):

Discharge Current ◽

Spark Discharge ◽

Discharge Process ◽

Electrical Parameters ◽

Aluminium Sheet ◽

Material Thickness ◽

Sheet Materials ◽

Discharge Method ◽

Underwater Spark Discharge

The effect of certain electrical parameters on the forming of flat circular aluminium sheet specimens clamped at their periphery and formed by means of the underwater spark discharge process as described in a previous paper (40) is extended to cover a number of different materials. Experimental observations on the effect of stand-off distance and material thickness on deformation and deflection are included and the speed of movement during the deflection of specimens of different materials is compared. The variation with polar deflection of strain at a particular radius is presented and the nature of the discharge current is also discussed.

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