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문인섭,최형기,이철희,박기영,김종교,Moon In-Seob,Choi Hyoung-Ki,Lee Chul-Hee,Park Ki-Young,Kim Chong-Kyo 대한음성학회 2004 말소리 Vol.49 No.-
In this paper, we make a study of classification normal from abnormal - normal, asthma through analysis of thoracic sound to take use thoracic sound detection system. Thoracic sound detection system has a function to store thoracic sound and analyze the data. The wave shape of thoracic sound is similar to noise and is systematically generated by inhalation and exhalation breathing, therefore, in this paper, to classify asthma sound in thoracic sound, we could discriminate between normal and abnormal case using level crossing rate(LCR) and spectrogram energy rate.
전자빔 증착법으로 제조된 박막 태양전지용 CuGaS<sub>2</sub> 박막의 특성
정운조 ( Woon-jo Jeong ),문인섭 ( In-seob Moon ),조순계 ( Soon-kye Cho ),김민기 ( Min-ki Kim ),김운섭 ( Woon-sub Kim ),부수일 ( Su-il Boo ),안호근 ( Ho-geun Ahn ),양현훈 ( Hyeon-hun Yang ),박계춘 ( Gye-choon Park ) 한국환경기술학회 2008 한국환경기술학회지 Vol.9 No.2
전자빔 증착법에 의해 70℃의 기판온도와 350℃에서 60분 동안 열처리한 경우 단상의 CuGaS<sub>2</sub> 박막이 얻어졌으며, 이때의 XRD 회절 피크는 회절각 28.8°에서 (112)방향으로 가장 강한 피크가 나타났고, 두 번째로 강한 피크는 회절각 49.1°에서 (204)방향을 나타났다. 또한 CuGaS<sub>2</sub> 박막의 격자상수 a와 c는 각각 5.37Å과 10.54Å이었다. 그리고 CuGaS<sub>2</sub> 박막의 그레인 사이즈는 최대 1μm 정도였다. 또한 황이 과잉 공급된 CuGaS<sub>2</sub> 박막의 (112) 피크가 황이 추가로 공급되지 않은 경우에 비해 약 10% 정도 더 강하게 나타남을 알 수 있었다. 그리고 이와 같은 제조된 CuGaS<sub>2</sub> 박막의전기저항률, 홀 이동도 및 캐리어 농도는 각각 1.4Ω-cm, 15㎠/V·sec and 2.9×10<sup>17</sup>cm<sup>-3</sup>이었다. 본 연구에서 CuGaS<sub>2</sub> 박막의 저항률은 홀 이동도보다 캐리어 농도에 더 지배적임을 알 수 있었고, 상기와 같이 제조된 CuGaS<sub>2</sub> 박막은 모두 p-type 반도체 특성을 나타냈다. By EBE(Electron Beam Evaporation) method, Single phase CuGaS<sub>2</sub> thin film with the highest diffraction peak of (112) at diffraction angle(2θ) of 28.8˚ was made at substrate temperature of 70℃, annealing temperature of 350℃ and annealing time of 60min. And second highest (204) peak was shown at diffraction angle of (2θ) of 49.1˚. Lattice constant of a and c of that CuGaS<sub>2</sub> thin film was 5.37Å and 10.54Å respectively. The greatest grain size of the thin film was about 1㎛. The (112) peak of single phase of CuGaS<sub>2</sub> thin film at annealing temperature of 350℃ with excess S supply was appeared with a little higher about 10% than that of no excess S supply. And the resistivity, Hall mobility and carrier concentration at room temperature of p-type CuGaS<sub>2</sub> thin film was 1.4Ω-cm, 15㎠/V·sec and 2.9×10<sup>17</sup>cm<sup>-3</sup> respectively. It was known that carrier concentration had considerable effect than mobility on variety of resistivity of the fabricated CuGaS<sub>2</sub> thin film, and the polycrystalline CuGaS<sub>2</sub> thin films were made at these conditions were all p-type.
반응성 스퍼터링법으로 제조된 TaN 박막의 특성에 관한 연구
정운조 ( Woon-jo Jeong ),문인섭 ( In-seob Moon ),조순계 ( Soon-kye Cho ),부수일 ( Su-il Boo ),안호근 ( Ho-geun Ahn ) 한국환경기술학회 2007 한국환경기술학회지 Vol.8 No.3
높은 경도와 밀착력이 요구되는 각종 공구류 코팅 및 정밀 박막 저항체로서 혹은 집적회로에서 구리나 알루미늄 배선에 대한 확산 방지막으로 가장 효과적인 TaN 박막의 균일 코팅 공정 기술을 반응성 스퍼터링 방법으로 제조하고 그 구조적 및 기계적 특성을 고찰하였다. 그 결과 DC sputtering 법에서 도출된 최적의 기판온도와 질소 가스비는 각각 100℃, 20% 부근 이었으며, 이때 제작된 TaN 박막의 비커스 경도와 부착력 및 면저항은 각각 약 4,000Hv, 30N, 1mΩ/square 부근으로 나타났다. Tantalum nitride(TaN) thin films are attractive for use as the coating of various precision tools which need hardness and adhesion, or the precision thin film resistors, and the diffusion barriers in metal(copper or aluminum)-semiconductor contacts. In this work, we have investigated the mechanical and structural properties of TaN films fabricated by a reactive sputtering technique at different nitrogen partial pressures. From the sputtering results, the optimal values for the substrate temperature and the nitrogen gas ratio were around 100℃ and 20% respectively. Under these conditions, vickers hardness, adhesion force, and sheet resistance were estimated at around 4,000Hv, 30N, 1mΩ/square respectively.
발성속도 및 세기와 잡음환경에 따른 음성 인식시스템 성능 분석
文仁燮,김종교 全北大學校 1996 論文集 Vol.42 No.-
Speech recognition systems are increasingly utilized in various applications like telephone services where a user places a call by uttering the digits or the name of the person. One of the main problems in the applications is the performance analysis of speech recognition system according to uttering speeds, powers and noise environment. In this paper, we tested the recognition rates according to utterance speeds and powers. And we analyzed the recognition system performance if noise environment. Speaking loud and middle speeds, speech recognition rate was the best. In the result of recognition rate according to the kind of noise environments, recognition system performance was most excellent on car-noise environment.
문인섭,김종교 전북대학교 공업기술연구소 1998 工學硏究 Vol.29 No.-
The purpose of this paper is to construct the telephone speech database in Korean. For the construction of a large scale database of telephone speech, we designed automatic speech collection system. The system consists of a dialogic board, which detects DTMF tone and manage the main program and information comments, and hard disks which store speech data. We constructed CD-ROM version of an enlarged Korean telephone speech database, including 400 PBW (Phonetically Balanced Word) and 76PBS(Phonetically Balanced Sentence).
신유식,문인섭,김종교 전북대학교 공업기술연구소 1998 工學硏究 Vol.29 No.-
This paper presents a method of reference pattern creation based on genetic algorithm. This technique is evaluated on the text-prompt speaker recognition system. An enhanced dynamic time warping for speaker recognition algorithm is applied. For real-time processing, we use a simple algorithm for end-point detection without increasing computational complexity. As the experimental results of the proposed algorithm for three prompt words, the FR(false rejection rate) is 3.19% and FA(false acceptance rate) is 1.19%