A Trial on Stochastic Evaluation of Near-By Electromagnetic Field Leaked from ITE Group Under Parallel Operating Situation

Abstract

In this study, in order to propose some evaluation methods to the research for correlative and/or accumulative effects in waved environmental problem, a fairly complicated fluctuation form of the near-by electromagnetic (abbr. EM) field leaked from the information terminal equipment (abbr. ITE) group under parallel operation has been especially noticed. Concretely, differing from the early EM theory by Middleton started from its physical mechanism, two probability distribution expressions of orthonormal series expansion type have firstly introduced for these compound fluctuation forms. One is the statistical Hermite orthonormal series expansion type probability expression and the other is the statistical Jacobi orthonormal series expansion type probability expression. The former is based on the well-known Gaussian distribution, and the latter is based on the beta distribution which can flexibly deal with even complex features such as asymmetry and/or bimodality. By use of them, a new and effective technique which can flexibly evaluate the electric and/or magnetic field strength distributions under such a complicated situation has been proposed. Finally, with an application to measured data in the ITE group in the actual working environment, a part of the effectiveness of this method has been also experimentally confirmed.