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Makoto Yamakawa,Mitsuki Nihei,Masahiko Tatibana,Kyouzou Hukazawa,Makoto Ohsaki,Takuzo Nakamura,Hiroyuki Yamanouchi 대한기계학회 2015 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.29 No.4
In seismic design of building frames, dampers are designed to absorb an earthquake's energy. Conventional steel tension braces havedisadvantages, such as pinching or deterioration of stiffness and strength under cyclic loading. A new type of elasto-plastic damper canpotentially avoid such disadvantages at a relatively low cost. Main characteristics of the damper are twofold: i) hardening effect causedby geometric nonlinearity, and ii) asymmetric hysteretic restoring force in tensile and compressive loading conditions. The objective ofthe study is to present a constitutive model and identify the corresponding parameters. The process of parameter identification of themodel is formulated as a non-smooth optimization problem and derivative-free optimization methods are suited for the problem. Throughnumerical examples, we investigate the seismic response reduction property of the damper. The results demonstrate the effectiveness ofthe optimization approach.
Remarks on Four-Dimensional Probabilistic Finite Automata
Makoto Sakamoto,Yasuo Uchida,Makoto Nagatomo,Tuo Zhang,Hikaru Susaki,Takao Ito,Tsunehiro Yoshinaga,Satoshi Ikeda,Masahiro Yokomichi,Hiroshi Furutani 보안공학연구지원센터 2015 International Journal of Software Engineering and Vol.9 No.6
This paper deals with the study of four-dimensional automata. Recently, due to the advances in many application areas such as dynamic image processing, computer animation, augmented reality (AR), and so on, it is useful for analyzing computation of four-dimensional information processing (three-dimensional pattern processing with time axis) to explicate the properties of four-dimensional automata. From this point of view, we have investigated many properties of four-dimensional automata and computational complexity. On the other hand, the class of sets accepted by probabilistic machines have been studied extensively. As far as we know, however, there is no results concerned with four-dimensional probabilistic machines. In this paper, we introduce four-dimensional probabilistic finite automata, and investigate some accepting powers of them.
Remarks on Four-Dimensional Probabilistic Finite Automata
Makoto Sakamoto,Yasuo Uchida,Makoto Nagatomo,Tuo Zhang,Hikaru Susaki,Takao Ito,Tsunehiro Yoshinaga,Satoshi Ikeda,Masahiro Yokomichi,Hiroshi Furutani 보안공학연구지원센터 2015 International Journal of Software Engineering and Vol.9 No.4
This paper deals with the study of four-dimensional automata. Recently, due to the advances in many application areas such as dynamic image processing, computer animation, augmented reality (AR), and so on, it is useful for analyzing computation of four-dimensional information processing (three-dimensional pattern processing with time axis) to explicate the properties of four-dimensional automata. From this point of view, we have investigated many properties of four-dimensional automata and computational complexity. On the other hand, the class of sets accepted by probabilistic machines have been studied extensively. As far as we know, however, there is no results concerned with four-dimensional probabilistic machines. In this paper, we introduce four-dimensional probabilistic finite automata, and investigate some accepting powers of them.
Ouchi, Makoto,Ito, Makoto,Kamemoto, Satoshi,Sawamoto, Mitsuo Wiley (John WileySons) 2008 Chemistry - An Asian Journal Vol. No.
<P>The systematic search and design of phosphine ligands (PR(3)) and amine cocatalysts resulted in obtaining pentamethyl-cyclopentadienyl (Cp*) ruthenium(II) phosphine complexes [RuCp*Cl(PR(3))(2)], which are highly active and removable catalysts, for transition-metal-catalyzed living radical polymerization of methyl methacrylate (MMA). The catalysts are conveniently prepared in situ from a tetrameric precursor [RuCp*(mu(3)-Cl)](4) and a selected phosphine (PR(3)). The combination of the meta-tolyl phosphine [P(m-Tol)(3)] ligand and a primary diamine cocatalyst [NH(2)(CH(2))(6)NH(2)] provides a highly active catalytic system with precision control of the molecular weight of the polymer. The high activity enables a low catalyst dose and a high turn-over frequency without deteriorating the controllability. A hydrophilic amine cocatalyst (amino alcohol) in place of the diamine, further forms an active and removable catalyst; simple treatment with acidic water gave colorless polymers visually free from metal residues (>97 % removal; <64 ppm).</P>