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Oba, Masaki
no journal, ,
Dimension reduction was performed using PCA on 462 types of training data obtained by processing Gd
O
, TiO, ZrOdata. After learning, the content rates of elements were analyzed using 62 types of data from actual samples as test data. Similar to last time, create a calibration curve of the true value and analytical value of the actual sample and analyze the content ratio. The neural network used this time had a configuration of input layer, middle layer (2 layers), and output layer, and the middle layer used 2 layers with 100 nodes each. As a result of PCA on the training data, we were able to significantly reduce the 7944 dimensions (pixels) of the training data to 5 dimensions. As a result of training using this and analyzing test data, the difference from the true value was approximately 10%, which was almost the same as the previous value.
Kaneda, Miyu*; Mori, Minami*; Takahashi, Masakuni*; Fukada, Yukimasa; Yoshii, Kenji; Fukuda, Tatsuo; Yoshigoe, Akitaka; Kobata, Masaaki; Ikeda, Naoshi*; Kano, Jun*; et al.
no journal, ,
no abstracts in English
Watanabe, Kenichi*; Oshima, Yuya*; Hirata, Yuho
no journal, ,
Li has a high cross section for thermal neutrons and undergoes the Li(n, t) alpha reaction. This reaction is important in thermal neutron detection, and scintillator materials containing Li are widely used for neutron detection. However, the luminescence efficiency for the tritons and alpha-particles emitted from the Li(n, t) alpha-reaction is reduced due to the quenching effects. This makes it difficult to separate the emission of particles generated by background gamma-rays and neutrons by the amount of luminescence. Although, the alpha/beta ratio has been used as a conventional index to evaluate the quenching effect of scintillators for neutrons, it is insufficient for small scintillators because it does not fully reflect the effect of alpha and triton particles on the luminescence. In this study, we adopted Birks equation as a model for the quenching effect, simulated the quenching effect using the Monte Carlo simulation code PHITS, and compared the obtained signal wave height distributions with experimental results.
Kitayama, Yoshiharu; Nogami, Mitsuhiro*; Hitomi, Keitaro*
no journal, ,
no abstracts in English
species at SiO/Si interfaces in Si dry oxidationTsuda, Yasutaka; Yoshigoe, Akitaka; Ogawa, Shuichi*; Sakamoto, Tetsuya*; Yamamoto, Yoshiki*; Yamamoto, Yukio*; Takakuwa, Yuji*
no journal, ,
no abstracts in English
Honda, Mitsunori; Kaneta, Yui; Muraguchi, Masakazu*; Hayakawa, Kosetsu*; Oda, Masato*; Iino, Chiaki*; Ishii, Hiroyuki*; Goto, Takuya*
no journal, ,
Our research focuses on the use of weathered biotite (WB) as an alternative material to thermoelectric materials, which have traditionally been made from rare and toxic elements. After WB was crushed and classified, crystals with conductivity comparable to that of Si semiconductors in the temperature range of 650-850
C were obtained by heat treatment using the molten salt method. In this study, we report on the results of the dimensionless evaluation index ZT calculated from the conductivity, Seebeck coefficient, and thermal diffusion measurements in the high temperature range, and the thermal conductivity calculated from the specific heat and specific gravity.
Hayakawa, Kosetsu*; Masebo, Yumeno*; Muraguchi, Masakazu*; Kojima, Yoichiro*; Oda, Masato*; Iino, Chiaki*; Ishii, Hiroyuki*; Honda, Mitsunori
no journal, ,
We have been studying the development of functional materials derived from WB as an application of molten-salt treatment technology. We have experimentally demonstrated that Sr can be adsorbed on the interlayer of WB by molten-salt treatment. However, the correlation between Cs adsorption and Sr adsorption has not yet been clarified, although Sr adsorption was examined for Cs adsorbed WB in a previous study. Therefore, in this study, the amount and structure of Sr adsorption with and without Cs adsorption were investigated using XRF, XRD and XAFS. The results showed that the Sr adsorption dependence may differ depending on the presence or absence of Cs in WB.