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심장엽,김상범,김주성,김수훈,이영재,허강인 東亞大學校 附設 情報通信硏究所 1996 情報通信硏究所論文誌 Vol.4 No.1
This paper is a study on the composition of Real-Time Continuous Speech Recognition System for Man-Machine Interface and it examines the posibility that applies to automatic system. The Continous Speech Recognition System is composed of Contivuous Distribution HMM model and algorithm of One Pass DP method. The System is composed so that it may detect start point and end point of speech data which are converted into samples by 10 KHz, 8 bit A/D whthin real time, then so that it may recognie them by one Pass DP method, display the result of recognition on PC monitor and at same time sent control data to Interface. HMM models are creadted by training for continuous speech samples which are control words, area names and digital sounds. In the result of experiment by Continuous Speech Recognition System, there are some kind of errors which are insertion, replacement and deletion of one syllable, but it examined the posibility that can by applied to Man-Machine Interface on automatic system if post-process is performed for recognition.
포토리프랙티브 결정 내의 두빔 에너지 결합에서의 Bragg 회절
김재동,김주엽,이연호 成均館大學校 科學技術硏究所 1994 論文集 Vol.45 No.2
In this paper we employ a new method to derive Bragg diffraction from a photorefractive grating without four - wave mixing geometry. In this calculation we assume two - beam energy coupling in a photorefractive crystal to occur due to Bragg diffraction of two incident beams from a photorefractive grating. At a steady - state of two - beam energy coupling we have obtained Bragg diffraction of the incident beams, which corresponds to Bragg diffraction of any incident beam, or a third probe beam. It is shown that our result predicts exactly the same Bragg diffraction as the coupled wave equations of four- wave mixing, and that the diffraction effciency strongly depends on two - beam coupling gain. It is also shown that our result is given by a form much simpler than its counterpart.
Hg(0) Removal Using Se(0)-doped Montmorillonite from Selenite(IV)
Joo-Youp Lee,Yong Jin Kim 대한화학회 2013 Bulletin of the Korean Chemical Society Vol.34 No.12
Potassium methylselenite (KSeO2(OCH3)) was reduced to elemental selenium, Se(0), and then doped onto montmorillonite K 10 (MK10) clay to examine the interaction between elemental mercury (Hg(0)) vapor and Se(0) in an effort to understand the possible heterogeneous reaction of Hg(0) vapor and Se(0) solid. The clay was used as a cost-effective support material for uniform dispersion of Se(0). The Se(0)-doped MK10 showed an excellent reaction performance with Hg(0) under an inert nitrogen gas at 70 and 140 ºC in our lab-scale fixed-bed system. However, the precursor, KSeO2(OCH3)-doped MK10 showed a negligible reaction performance with Hg(0), suggesting that the oxidation state of selenium plays a key role in the reaction of Hg(0) vapor and selenium compounds.
이주엽(Joo Youp Lee),정상헌(Sang Hun Jeong),이광순(Kwang Soon Lee) 대한전자공학회 1992 대한전자공학회 학술대회 Vol.1992 No.10
Three different reflux policies are compared for a batch distillation process in which a fixed recovery with a given average purity of the distillate is required: the first, for the constant distillate purity: the second, for the constant reflux ratio: finally, for the optimal reflux policy which gives the minimum operation time. The optimal reflux policy was obtained using Pontryagin's maximum principle. Through the numerical simulations for the three different binary mixtures, it was found that the time advantage of the optimal reflux operation over the constant overhead composition operation varies from 10.0 to 22.4% and the advantage over the constant reflux operation varies from 11.6 to 36.6% in the three cases considered.