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Ueki, Taro
Nuclear Science and Engineering, 194(6), p.422 - 432, 2020/06
Times Cited Count：0 Percentile：0.01(Nuclear Science & Technology)In Monte Carlo criticality calculation, the convergence-in-distribution check of the sample mean of tallies can be approached in terms of the influence range of autocorrelation. In this context, it is necessary to evaluate the attenuation of autocorrelation coefficients over lags. However, in just one replica of calculation, it is difficult to accurately estimate small ACCs at large lags because of the comparability with statistical uncertainty. This paper proposes a method to overcome such an issue. Its essential component is the transformation of a standardized time series of tallies so that the resulting series asymptotically converges in distribution to Brownian motion. The convergence-in-distribution check is constructed based on the independent increment property of Brownian motion. The judgment criterion is set by way of the spectral analysis of fractional Brownian motion. Numerical results are demonstrated for extreme and standard types of criticality calculation.
Takebe, Shinichi; Fujiwara, Keiji*; Moriyama, Hirotake*
Nihon Genshiryoku Gakkai "Shisetsu, Kankyo Hoshano Dotai" Kenkyu Senmon Iinkai Hokokusho, p.1 - 9, 2003/03
no abstracts in English
Kojima, Takuji
Hoshasen To Sangyo, (89), p.4 - 7, 2001/01
This paper describes the present status of dosimetry as one of the useful technique for the process/quality control in radiation application and radiation research/testing. It introduces (a)activities in dose standardization of International Organization for Standardization(ISO) and International Atomic Energy Agency(IAEA) on publication of standards and organization of workshops, (b)recent efforts for consistency check in dose evaluation of electrons having energies above 4MeV, and (c)development status of dosimeter systems relevant to new requirements in dosimetry. It also comments on importance of planning for succession of high-dose dosimetry technology and education/training of dosimetry workers/researchers.
; Okamoto, Yoshizo*
Hihakai Kensa, 48(10), p.642 - 652, 1999/10
no abstracts in English
Yamaguchi, Yasuhiro
Hoken Butsuri, 33(3), p.253 - 254, 1998/09
no abstracts in English
Tanaka, Ryuichi
Hoshasen To Sangyo, (59), p.14 - 19, 1993/09
no abstracts in English
Tanaka, Ryuichi; Takehisa, Masaaki*
Hoshasen Kagaku, (56), p.9 - 19, 1993/00
no abstracts in English
Tanaka, Ryuichi
Radioisotopes, 40(12), P. 85, 1991/12
no abstracts in English
Tanaka, Ryuichi
Genshiryoku Kogyo, 36(3), p.32 - 36, 1990/00
no abstracts in English
Tanaka, Ryuichi
Hoshasen Kagaku, (49), p.29 - 31, 1990/00
no abstracts in English
