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Feature selection aims to find the most important information from a given set of features. As this task can be seen as an optimization problem, the combinatorial growth of the possible solutions may be in-viable for a exhaustive search. In this paper we propose a new nature-inspired feature selection technique based on the bats behaviour, which has never been applied to this context so far. The wrapper...
Recently, the requirement for a high efficiency motor has increased; further, considerable attention has been paid to a permanent magnet (PM) motor, which has been studied in many researches. Therefore, we have studied a line-start permanent magnet synchronous motor (LSPMM), which can start as an induction motor and operate as a PM motor. In this paper, for the purpose of calculating asynchronous...
Creolization is a self-organization process of new language community. Thus far, a simulation study of the emergence of creoles has been reported in a mathematical framework. In this paper we introduce a scale-free network to the framework. We show that local creole communities are organized, regardless of the degree of exposure to non-parental languages, in contrast to the non-spatial model, and...
We have theoretically analyzed the mechanism of PBTI degradation of high-k gate dielectrics. We proposed a PBTI degradation model based on a comprehensive physical theory using the general notation of gate leakage current and adequate trap distribution. Furthermore, by taking account not only pre-existing but also stress-induced defects, our model could explain the experimental data with high accuracy...
This paper proposes a simulator-based foresight control approach for nonlinear plant based on system identification. In the proposed method, as a main part of the simulator-based foresight control system, a simulator of an exact plant model of non-affine nonlinear plant is first constructed. If relative degree of disturbance is smaller than control input, servo type filter will be then installed in...
Particulate matters (PM) including soot in diesel exhaust gas are severe environmental problems. It is expected that emission of soot particles can penetrate into the lung, causing human carcinogenic effects. To reduce these emissions especially from heavy-duty vehicles such as cargo trucks and buses, a diesel particulate filter (DPF) has been developed for the after-treatment of exhaust gas. In simple...
Creolization is a self-organization process of new language community. Thus far, a simulation study of the emergence of creoles has been reported in the mathematical framework. In this paper we introduce a spatial structure to the framework. We show that local creole communities are organized, and creolization may occur when language learners learn often from non-parental language speakers, in contrast...
Line start permanent magnet motors (LSPMMs), which consist of a squirrel-cage rotor that contains a few permanent magnets, can be considered as being more efficient than high-efficiency induction motors. However, methods to improve the starting and running characteristics of LSPMMs have not been clarified in detail. In this paper, we propose the basic concepts of an analytical calculation method of...
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