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나가하라나리카츠 ( Nagahara Narikatsu ) 한국일본어교육학회 2016 日本語敎育 Vol.0 No.77
This paper has explored the similarities and differences in the word construction of the words with ``~ 的`` enlisted in Dictionary of the Japanese Language and Standard Korean Dictionary, and investigated the appearance frequency of common ``~ 的`` in the two dictionaries. The ``~ 的(teki)`` enlisted in Dictionary of the Japanese Language were 792 in total, ``~ 的(jeok)`` in Standard Korean Dictionary were 1215 in total, and the common words in the both languages were the ``One-character Chinese word`` total of 28, the ``Two-character Chinese word`` 527, the ``Three-character Chinese word`` 28, and the ``Four-character Chinese word`` 584.
長原成功(NAGAHARA) 강원대학교 인문과학연구소 2016 인문과학연구 Vol.0 No.50
본 연구는 ‘青空文庫(aozora mungo)’에 실려 있는 ‘しばらく(shibaraku)’ 가 들어간 문장을 모두 추출하여 각문에서 ‘しばらく(shibaraku)’의 시간량을 알 수 있는 총 2,762의 문장을 분석하여 ‘しばらく(shibaraku)’가 가지는 시간적 특성을 ‘짧은 시간량’, ‘중간 시간량’, ‘긴 시간량’으로 3가지로 나누어 고찰하고 ‘しばらく(shibaraku)’와 동사와의 공기관계를 분석하였다. 그 결과 짧은 시간량을 나타내는 ‘しばらく(shibaraku)’는 총 1,844건, ‘중간 시간량’을 나타내는 ‘しばらく(shibaraku)’는 총 601건, ‘긴 사간량’을 나타내는 ‘しばらく(shibaraku)’는 총 317건으로 ‘しばらく(shibaraku)’가 가지고 있는 시간 특성은 일반적으로 전해온 ‘중간 시간량’이 아니라 ‘짧은 시간’의 특성을 더 많이 가지고 있음을 알 수 있었다. ‘しばらく(shibaraku)’와 동사와의 공기관계를 보면 짧은 시간량을 나타내는 ‘しばらく(shibaraku)’와 제일 많이 공기되는 동사 상위 4위는 ‘かんがえる(kangaeru)’(218건), ‘だまる(damaru)’(178건), ‘ながめる(nagameru)’(176건)’, ‘みる(miru)’(145건)였으며 뒤에 이어지는 문이나 보어 요소 혹은 사건의 상활에 따라서 ‘しばらく(shibaraku)’가 가지는 시간적 특성이 결정된다. 중간 시간량을 나타내는 ‘しばらく(shibaraku)’와 제일 많이 공기되는 동사 상위 3위는 ‘あるく(aruku)’(66건), ‘まつ(matsu)’(64건), ‘はなす(hanasu)’ (53건)였으며 이것 역시 사건의 상황에 따라서 ‘しばらく(shibaraku)’가 가지는 시간적 특성이 결정된다. 긴 시간량을 나타내는 ‘しばらく(shibaraku)’와 제일 많이 공기되는 동사 상위 4위는 ‘いく(iku)’(15건), ‘滞在する(taizaisuru)’(13건), ‘いる(iru)’(11건), ‘くらす(kurasu)’(11건)였으며 특히 ‘滞在する(taizaisuru)’와 ‘くらす(kurasu)’는 동사자체가 며칠 이상의 시간적 특성을 가지고 있는데 사건의 상황에 따라서는 ‘しばらく(shibaraku)’가 몇 개월, 몇 년까지도 나타낼 수 있음을 알 수 있었다. This study has extracted all the sentences that include ‘しばらく(shibaraku)’, from ‘青空文庫(aozora mungo)’, then analyzed 2,762 sentences from which the amount of time of ‘しばらく(shibaraku)’ can be measured. The temporal characteristics of ‘しばらく(shibaraku)’ were divided into three types of ‘a short amount of time’, ‘a medium amount of time’ and ‘a long amount of time’ for the study, and analyzed the co-occurrence of ‘しばらく(shibaraku)’ and the verbs. The result showed that ‘しばらく(shibaraku)’ for the short amount of time were 1,844 in total, that for the medium amount of time were 601 and that for the long amount of time were 317. This proves that the temporal characteristics of ‘しばらく(shibaraku)’ has more of the ‘short amount of time’, not of the ‘medium amount of time’, which has been generally known. By looking at the co-occurrence of ‘しばらく(shibaraku)’ and the verbs, it showed the 4 mostly often co-occurred verbs were ‘かんがえる(kangaeru)’(218 cases), ‘だまる(damaru)’(178 cases), ‘ながめる(nagameru)’(176 cases) and ‘みる(miru)’(145 cases). The temporal characteristics of ‘しばらく(shibaraku)’ were determined by the elements of the sentence, complement or by the situations of the events. The three mostly often occurred verbs with ‘しばらく(shibaraku)’ for the medium amount of time were ‘あるく(aruku)’(66 cases), ‘まつ(matsu)’(64 cases) and ‘はなす(hanasu)’(53 cases). The temporal characteristics of ‘しばらく(shibaraku)’ were determined by the situations of the events. The three mostly often occurred verbs with ‘しばらく(shibaraku)’ for the long amount of time were いく(iku)’(15 cases), ‘滞在する(taizaisuru)’(13 cases), ‘いる(iru)’(11 cases), ‘くらす(kurasu)’(11 cases). In particular, ‘滞在する(taizaisuru)’ and ‘くらす(kurasu)’ verbs themselves have the temporal characteristics, and ‘しばらく(shibaraku)’ can represent several months or even several years, depending on the situation of the events.
Optimal Design of ΔΣ Modulators via Generalized KYP Lemma
M. Nagahara,Y. Yamamoto 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
In this article, we propose a new design method of ΔΣ modulators. We propose an optimal design to shape the frequency response of the noise transfer function(NTF). Generalized KYP(Kalman-Yakubovic-Popov) lemma is used to reduce our optimization to alinear matrixin equality. Design examples are illustrated to show effectiveness of our method.
H<SUP>2</SUP>/H<SUP>∞</SUP> Approach to the Histogram Method for Density Estimation
M. Nagahara,K. I. Sato,Y. Yamamoto 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
In this paper, we study nonparametric density estimation by the histogram method. Histogram is interpreted as quantization, which decreases the amount of information. Then interpolation (or estimation) of the missing information is needed. To achieve this, we introduce sampled-data H2/H∞ optimization. We design the reconstruction system which optimizes the worst case error between the original PDF and the estimation. The optimization is formulated by linear matrix inequalities and equalities. Numerical examples are illustrated to show effectiveness of our method.
Mathematical Properties of Maximum Hands-off Control
Masaaki Nagahara 제어로봇시스템학회 2020 제어로봇시스템학회 국제학술대회 논문집 Vol.2020 No.10
In this article, we discuss mathematical properties of maximum hands-off control. Maximum hands-off control is the L<SUP>0</SUP> optimal control, that is the sparsest control among all feasible controls. In other words, the maximum hands-off control has the shortest time length on which the control is inactive. We show the following fundamental properties of maximum hands-off control: the equivalence theorem between L<SUP>0</SUP> and L¹ optimal controls, necessary conditions via the non-smooth maximum principle, and the existence theorem.
Vortex Cavitation from Baffle Plate and Pump Vibration in a Double-Suction Volute Pump
Sato, Toshiyuki,Nagahara, Takahide,Tanaka, Kazuhiro,Fuchiwaki, Masaki,Shimizu, Fumio,Inoue, Akira Korean Society for Fluid machinery 2011 International journal of fluid machinery and syste Vol.4 No.1
This study highlights especially the mechanism of vortex cavitation occurrence from the end of the suction duct in a double-suction volute pump and pump oscillation which causes cavitation noise from the pump. In this study, full 3D numerical simulations have been performed using a commercial code inside the pump from the inlet of suction duct to the outlet of delivery duct. The numerical model is based on a combination of multiphase flow equations with the truncated version of the Rayleigh-Plesset model predicting the complicated growth and collapse process of cavity bubbles. The experimental investigations have also been performed on the cavitating flow with flow visualization to evaluate the numerical results.