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스크린 인쇄법을 이용한 NASICON 후막 SO<sub>2</sub>가스 센서의 제조 및 특성
배재철,이상태,전희권,방영일,이덕동,허증수,Bae, J.C.,Lee, S.T.,Jun, H.K.,Bang, Y.I.,Lee, D.D.,Huh, J.S. 한국재료학회 2003 한국재료학회지 Vol.13 No.2
The thick film type sensor having Pt/Na Super Ionic Conductor(NASICON) solid electrolyte/Pt/$Na_2$$SO_4$/Pt catalyst system for $SO_2$gas was fabricated by screen-print method. The phase of Na Super Ionic Conductor solid electrolyte sintered at different temperature of 1050, 1150,$ 1250^{\circ}C$ and for different time of 1.5, 2.5, 3.5 hr were investigated by XRD. The Electromotive Force variation of the sensor with $SO_2$concentrations and operating temperatures were investigated. The major phase of Na Super Ionic Conductor film sintered at 115$0^{\circ}C$ for 3.5 hr was sodium zirconium silicon phosphate($Na_3$Zr$_2$$Si_2$PO$_{12}$). The Nernst's slope of Na Super Ionic Conductor sensor for $SO_2$gas with the variation of concentration from 10 to 100 ppm was 167.14 ㎷/decade at the operating temperature of $500 ^{\circ}C$. The increase of oxygen partial pressure was not affected to the variation of Nernst's slope.e.
TMS320C6711 DSP를 이용한 HMM 기반의 음성인식시스템 구현
배재철(Jaechul Bae),김태환(Taehwan Kim),배건성(Keunsung Bae) 대한전자공학회 2006 대한전자공학회 학술대회 Vol.2006 No.11
In this paper, we implement an HMM-based speech recognizer on the TMS320C6711 DSK. First, we develop an HMM-based speech recognition system on the PC that operates on the frame basis with parallel processing of feature extraction and Viterbi decoding to make the processing delay as small as possible. Many techniques such as linear discriminant analysis, state-based Gaussian selection, and phonetic tied mixture model are employed for reduction of computational burden and memory size. The system is then properly optimized and compiled on the TMS320C6711 DSP for a real-time operation We confirm a real-time operation with the TMS320C6x profiler in Code Composer Studio. And we implement a communication between the host and the TMS320C6711 DSK through the host port interface.
배재철 ( Jae Cheol Bae ),김주호 ( Joo Ho Kim ),김현기 ( Hyun Ki Kim ),황인오 ( In Ho Hwang ),박창민 ( Chang Min Park ),박현수 ( Hyun Soo Park ),정문일 ( Moon Il Jung ),노명도 ( Myong Do Ro ) 정보저장시스템학회 2005 추계학술대회논문집 Vol.2005 No.-
We report the random pattern characteristics of the super resolution near field structure(Super-RENS) write once read-many(WORM) disc at a blue laser optical system(laser wavelength 405nm, numerical aperture 0.85) and the Super-RENS read only memory(ROM) disc at a blue laser optical system(laser wavelength 659nm, numerical aperture 0.65). We used the WORM disc of which carrier-to-noise ratio (CNR) of 75nm is 47dB and ROM disc of which carrier-to-noise ratio (CNR) of l73nm is 45dB. We controlled the equalization (EQ) characteristics and used advanced partial-response maximum likelihood (PRML) technique. We obtained bit error rate (bER) of 10-3 level at 50GB WORM disc and bite error rate of 10-4 level at 50GB level ROM disc. This result shows high feasibility of Super-RENS technology for practical use.