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실린더 압력을 이용한 SI엔진의 페루프 점화시기 제어에 관한 연구
박승범,윤팔주,선우명호,Park, Seung-Beom,Yun, Pal-Ju 대한기계학회 2000 大韓機械學會論文集A Vol.24 No.9
The introduction of inexpensive cylinder pressure sensors provides new opportunities for precise engine control. This paper presents a control strategy of spark advance based upon cylinder pressure of spark ignition engines. A location of peak pressure(LPP) is the major parameter for controlling the spark timing, and also the UP is estimated, using a multi-layer feedforward neural network, which needs only five pressure sensor output voltage samples at -40˚, -20˚, 0˚, 20˚, 40˚ after top dead center. The neural network plays an important role in mitigating the A/D conversion load of an electronic engine controller by increasing the sampling interval from 10 crank angle(CA) to 20˚ CA. A proposed control algorithm does not need a sensor calibration and pegging(bias calculation) procedure because the neural network estimates the UP from the raw sensor output voltage. The estimated LPP can be regarded as a good index for combustion phasing, and can also be used as an MBT control parameter. The feasibility of this methodology is closely examined through steady and transient engine operations to control individual cylinder spark advance. The experimental results have revealed a favorable agreement of individual cylinder optimal combustion phasing.
9-10세기 동아시아 지역의 교역 -신라말,고려초 한반도를 중심으로-
박승범 ( Park Seung Beom ) 중국사학회 2004 中國史硏究 Vol.29 No.-
This work attempts to clarify the character of the trade in the East Asia for the 9-10th centuries. Hitherto, they concede that local power groups leaded the trade from the 8-9th centuries, and do not notice aspects of the trade after the times. It is the reason that royal powers of all of the three kindoms. Tang, Silla. Japan, was declining, simultaneously, local power groups expanded the domination of the territory, governments. But, all the time, the three kindoms had the leadership of trade. Tang controlled the affair of overseas trade with Shih-po-ssu(市??司; The Office of overseas trade). Japan, also, did with Tazaifu(太??府). Needless to say, the Silla dynasty was retreating from the northern and the west-southern territory, non the ress. upkeeping the network of overseas trade untill losed her last habers-JinJu(晋州)-Kimhae(金海)-Ulsan(??山)-for trade. And She made Chang Bo해(張保皐). as was a deputy. execute the affair of overseas trade. After the death of Chang Bogo, the Silla dynasty pressed his the remnants into accomplish trade leading by the state. The Koryo dynasty took over the policy of the Silla dynasty, too. In the early of the Koryo dynasty, the trade which the private and local power groups achived was restrainted. Then what is the why they prohibited the trade of the private and local power groups? Silla wanted maintain the system of Golpoom(骨品), the order of social status. And Koryo hold a purpose that the private and local power groups don’t gain the energy overseas trade offers to be monsters menacable themselves. However, in spite of their themselves’s active trade, and properly resisted the policy of the royal. The effects are crashes between public, official trade and individual, illegal trade, which once in a while, trancefered commit piracies. These are features of the trade in East Asia for the 9-10th centuries.
SMIL의 메타모델을 이용한 멀티미디어 교육컨텐츠 설계
박승범 ( Seung-beom Park ),박기창 ( Ki-chang Park ),김철현 ( Cheol-hyeon Kim ),송호영 ( Ho-young Song ),김병기 ( Byung-ki Kim ) 한국정보처리학회 2006 한국정보처리학회 학술대회논문집 Vol.13 No.2
SMIL(Synchronized Multimedia Integration Language)은 멀티미디어 객체들의 시간적, 공간적 배열이 가능한 XML기반의 언어로서 웹브라우저상에서 효과적인 멀티미디어 표현을 가능하게 한다. 기존의 교육시스템에서는 멀티미디어컨텐츠의 동기화표현이 불가능하거나 별도의 클라이언트 어플리케이션이 필요하였다. 본 논문에서는 멀티미디어 통합 언어인 SMIL의 메타모델을 분석하고 적용한 교육컨텐츠의 개발을 제안하고, 별도의 플러그인이나 어플리케이션이 필요없이 브라우저상에서 표현가능한 멀티미디어 교육컨텐츠를 설계하였다.
동영상 객체추출 기술 기반의 H2M e-learning 시스템 제안
박승범 ( Seung-beom Park ),이상준 ( Sang-jun Lee ),송호영,김병기 ( Byoung-ki Kim ) 한국정보처리학회 2006 한국정보처리학회 학술대회논문집 Vol.13 No.1
본 논문에서는 양방향 인터넷 방송을 위하여 연구되고 있는 고품질 동영상 콘텐츠의 객체 분할 기술을 이용하여 컴퓨터와 사용자간의 인터랙션을 개선하여 학습 몰입도를 높이고 고품질의 서비스를 제공하는 H2M(Human to Machine) e-learning 시스템을 제안한다. 본 시스템에서는 고품질 동영상 콘텐츠 및 기타 정보를 한눈에 볼 수 있으며 에듀테인먼트를 가미한 H2M e-learning시스템에 적합한 새로운 인터페이스를 제공하고자 한다.