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Optimal Number of Intelligent Nodes of Distributed Communication Processing for a Cloud System
Mitsutaka Kimura,Mitsuhiro Imaizumi,Toshio Nakagawa 대한산업공학회 2015 대한산업공학회 추계학술대회논문집 Vol.2015 No.11
Recently, distributed communication processing for a cloud system has been proposed for the purpose of reduce response time to clients [1, 2, 3, 4]. The cloud system consists of some intelligent nodes as well as a data center. The intelligent node provides client service near clients. The data center manages all of client information and application software. In order to reduce response time to more clients, we had better manage many intelligent nodes. But it has prohibit costs. We propose an optimal policy to reduce the management cost of intelligent nodes. We formulate a stochastic model of a server system with a certain number of intelligent nodes and derive the expected numbers of the replication and of application processing. Further, we derive the cost effectiveness and discuss an optimal number of intelligent nodes to minimize it.
Kyoko Kato,Toshio Kimura 한국세라믹학회 2006 한국세라믹학회지 Vol.43 No.11
Textured Bi0.5(Na,K)0.5TiO3-BiFeO3 ceramics were prepared by the reactive-templated grain growth proces, using platelikeBi4Ti3O12 particles. The effects of chemical composition in Bi0.5(Na,K)0.5TiO3 on texture development an d densification were exam-ined. Textured ceramics were obtained by using Bi 0.5K0.5TiO3 as an end member of the solid solution but densification was lim-ited. Dense ceramics were obtained by using Bi 0.5Na 0.5TiO3 but texture did not develop. Dense, textured ceramics were obtainedby using Bi (Na0.5K0.5)0.5TiO3.
Kato, Kyoko,Kimura, Toshio The Korean Ceramic Society 2006 한국세라믹학회지 Vol.43 No.11
Textured $Bi_{0.5}(Na,K)_{0.5}TiO_3-BiFeO_3$ ceramics were prepared by the reactive-templated grain growth process, using platelike $Bi_4Ti_3O_{12}$ particles. The effects of chemical composition in $Bi_{0.5}(Na,K)_{0.5}TiO_3$ on texture development and densification were examined. Textured ceramics were obtained by using $Bi_{0.5}K_{0.5}TiO_3$ as an end member of the solid solution but densification was limited. Dense ceramics were obtained by using $Bi_{0.5}Na_{0.5}TiO_3$ but texture did not develop. Dense, textured ceramics were obtained by using $Bi_{0.5}(Na_{0.5}K_{0.5})_{0.5}TiO_3$.
Mukai, Eiichi,Kakinoki, Toshio,Yamaguchi, Hitoshi,Kimura, Yoshimasa,Fukai, Sumio Journal of International Conference on Electrical 2013 Journal of international Conference on Electrical Vol.2 No.3
We examined the generation of harmonic voltage by a synchronous machine adding d-axis and q-axis harmonic field windings in order to reduce the harmonics in a power line. We derived the expressions of the armature voltage in the case of supplying the currents with the frequency nf to the d-axis and q-axis harmonic field windings. We constructed the synchronous machine adding the harmonic windings. In this paper, the expressions and the experimental results on the generation of harmonic voltages by the synchronous machine are presented.
Mukai, Eiichi,Fukai, Sumio,Kakinoki, Toshio,Yamaguchi, Hitoshi,Kimura, Yoshimasa Journal of International Conference on Electrical 2014 Journal of international Conference on Electrical Vol.3 No.2
We investigated the harmonic voltages generated by a synchronous machine adding d-axis and q-axis harmonic field windings to reduce the harmonics in a power line. First, electronic circuits such as a frequency multiplier, band-pass filter, and phase shifter were newly designed and made to carry out the experiment. Next, an experimental circuit, for which an AC voltage of frequency 6f synchronized to the power line voltage of frequency f could be obtained, was constructed to examine the generation of harmonic voltage in more detail. Finally, an experiment involving the generation of harmonic voltage was performed using an experimental synchronous generator with harmonic windings in the d-axis and q-axis. In this paper, the power spectrum and the waveforms of the harmonic voltages in the armature winding are presented. Moreover, the values calculated from theoretical expressions of harmonic voltages in armature winding are compared with the values obtained by the experiment.