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Advanced Railway Power Quality Detecting Algorithm Using a Combined TEO and STFT Method
유제호,신승권,박종영,조수환 대한전기학회 2015 Journal of Electrical Engineering & Technology Vol.10 No.6
Because an electric railway vehicle is a large scale moving load, it can cause various kinds of power quality problems in the railroad power system. The power quality impacts are considered as the strong instantaneous stresses to the related power systems and can cause an accelerating aging and a malfunction of the power supplying components. Therefore, it is necessary to detect the small and intermittent symptoms mixed in the voltage waveform. However, they cannot be detected by the triggering functions of the existing power analyzers installed in the railway systems. This paper will examine the drawback of some fast detection tools and propose an advanced detecting and analyzing method based on a combined TEO and STFT algorithm.
유제호 전북대학교 인문학연구소 2018 건지인문학 Vol.0 No.21
This article aimes to clarify the aspects of reported speeches and speech acts narration in the poems of Soweol, regarding the explicit perfomance of speech acts as extremely limited cases appearing only in a few socio-institutional domains. And this approach is an extension of those which examine the speeches reporting and speech acts narration respectively focussing on ① the aspects of speech acts reportinf in ordinary language, ② the modes of speeches narration in literary texts, ③ the same in Korean Pansori and ④ in the texts of current political news. Since Austin’s research in philosophy of ordinary language, most of highly-influential authors in this domain attempt to classify the category and dress the list of speech acts in English, French or German, and tend to generalize their views. But in the poems of Soweol as in ordinary verbal interaction, it seems that the cases of explicite narration of speech acts are extremely rare whereas their implicite aspects much more clear. From that point of view, and considering that speeches reporting and speech acts narration in poetical texts in general ressemble preferably with those of ordinary language, this study find all cases of reported speeches & and speech acts narration in the poems of Soweol to analyze in details their various textual effects; reproductive effects of direct speeches vs representative effects of indirect speeches, in particular.