Wavelet analysis of trees

Seiichi Fujimori, Shinichrou Hiruta, Mitsutoshi Akasaka, Tetsuo Endoh, Kazuo Ishiwata

Research output: Contribution to conferencePaper

Abstract

In this paper the discharge currents accompanied with tree developments are discussed based on the wavelet transformations. Tree phenomena are a very important object for studying solid insulating materials, and one of the physical quantities related with tree developments is the discharge currents. In this paper we apply the wavelet transformations to the discharge currents accompanied with the trees developing from the needle tip of a needle-plane electrode system in PE. The lack of the discharge current (pulses) were estimated by a neural network method. The results obtained are: The development of trees is active at the applied time with great wavelet coefficient α (I), and thus the development can be estimated from the variation of the corresponding wavelet coefficient α (I). The wavelet transformations are a very useful method for obtaining the time dependent information of local tree developments.

Original languageEnglish
Pages448-451
Number of pages4
Publication statusPublished - 1994 Dec 1
Externally publishedYes
EventProceedings of the 1994 IEEE 4th International Conference on Properties and Applications of Dielectric Materials. Part 2 (of 2) - Brisbane, Aust
Duration: 1994 Jul 31994 Jul 8

Other

OtherProceedings of the 1994 IEEE 4th International Conference on Properties and Applications of Dielectric Materials. Part 2 (of 2)
CityBrisbane, Aust
Period94/7/394/7/8

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Materials Chemistry

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  • Cite this

    Fujimori, S., Hiruta, S., Akasaka, M., Endoh, T., & Ishiwata, K. (1994). Wavelet analysis of trees. 448-451. Paper presented at Proceedings of the 1994 IEEE 4th International Conference on Properties and Applications of Dielectric Materials. Part 2 (of 2), Brisbane, Aust, .