http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
김진후,김동휘 東亞大學校 海洋資源硏究所 2006 硏究論文集 Vol.18 No.-
When four boreholes are installed in the cast-in-place pile, coordinates of the boreholes are obtained by using a least squares method, utilizing six hole-to-hole distance measurements. In addition, most probable values of hole-to-hole distances are calculated with coordinates of the boreholes. With the knowledge of borehole coordinates sound velocity of the pile can be obtained more accurately, and the cross section of the pile can be drawn with the drawing program easily. Also, coordinates of the boreholes would be very useful when a horizontal tomography technique is applied for integrity test of the cast-in-place pile.
몰드물성 및 Chip의 크기차이에 따른 웨이퍼 레벨 SiP에 대한 열 피로 해석 모사
김성걸,김주영,정호동,김재호 한국공작기계학회 2009 한국공작기계학회 춘계학술대회논문집 Vol.2009 No.-
This paper describes in detail the life prediction models, and simulation of thermal fatigue under different mold compounds and chip sizes for wafer level embedded SiP. A 3D Finite element model was built to simulate the viscoplastic behaviors for mold compounds and chip sizes. Especially, bonding parts between mold and Silicon Nitride(Si₃N₄) were carefully modelled and distribution of strains was studied. Three different chip sizes were used and the effects of mold compounds were observed. Consequently, this numerical study shows that type-A has better fatigue life than other mold compounds. Also, 4×4 size chip has a shorter life than 6×6 and 8×8 size.
김동한,신용서,전승호,백승화,이갑상 圓光大學校 1992 論文集 Vol.26 No.2
두부의 저장성 향상을 위해 보존료를 첨가하여 저장중 두부의 미생물상과 이화학적 변화를 검토하였다. 보존료 첨가에 의한 두부의 기호도 변화는 큰 차이가 없었으며 부패가 진행될 수록 적정산도와 amino태 및 ammonia태 질소량은 증가하였다. 두부는 acetic acid로 응고시키는 것이 CaCl₂보다 보존료에 의한 저장성 향상에 효과적이어서, acetic acid에 0.05% K-sorbate와 3% NaCl을 혼합첨가한 구는 저장중 이화학적 변화 및 호기성, 혐기성 세균수가 ?? cell/g수준인 점을 고려해 볼 때 30℃에서 48시간까지 저장이 가능하였다. In order to improve the shelf life of Tofu, the effects of preservatives on Tofu were investigated for microbiol and physicochemical changes during its storage. The sensory evaluation was not deteriorated by preservatives (0.05% K-sorbates). According to the progression of spoliage of Tofu, titratable acidity, and amino and ammonia nitrogen contents were increased. The effect of chemical preservatives on the shelf life of Tofu was shown to be stronger in the Tofu by acetic acid than in that by CaCl₂. The presence of 0. 05% K-sorbate and 3% NaCl as a preservative in Tofu by acetic acid extended it's shelf life upto 48 hrs at 30℃.
김성철,양동훈,송찬후,전형순 정보통신정책학회 2005 정보통신정책연구 Vol.12 No.1
RFID는 차세대 유비쿼터스 환경에서 중요한 기술적, 산업적인 위치를 차지할 것으로 주목받고 있는데 향후 다양한 분야에서 새로운 시장을 창출할 것으로 기대되고 있다. 본 연구는 RFID 확산으로 인해 야기되는 정보보호 이슈들에 대응하기 위한 기업차원의 주요전략에 대해 고찰한다. 우선 RFID의 개요와 RFID관련 정보보호 문제들을 개관한 후 주요 선진국의 법제도적인 그리고 기술적인 차원에서의 대응을 분석한다. 이러한 분석을 바탕으로 RFID를 공급하는 기업의 입장에서, RFID를 적용하는 수요기업의 입장에서 그리고 정부 입장에서의 전략적인 대응방안을 도출한다. RFID (radio frequency identification) as a form of next-generation barcode has received a great deal of attention in the commercial world over the couple of years. In spite of the promise of enhanced efficiency and accuracy, RFID raises privacy and information security issues. This paper examines privacy and information security issues and describes current legal actions and technical solutions. In addition, this paper suggests that RFID vendors, users and government need to develop careful strategies coping with RFID security challenges to enjoy the magic of RFID.
중소기업형 CIM시스템 구축을 위한 생산계획수립 및 실적파악 모듈
최후곤,신완선,장중순,서준성,여명구,안동근,김진봉 成均館大學校 科學技術硏究所 1996 論文集 Vol.47 No.2
This study Focuses on developing several modules involved in an integrated production information system for medium- or small-sized industries. The modules of order management, quality control, production scheduling, and shop management are executed for an example case industry. The potential values of this research includes that the major information modules to collect, analysis, and display production data and shop data for constructing the computer integrated manufacturing system(CIMS) are programmed with various features of medium- or small-sized industries
디지털 I-PD 제어기에 의한 태양광 발전 시스템의 정출력 제어
박지호,김영빈,신동률,문백영,우정인 東亞大學校 大學院 2000 大學院論文集 Vol.25 No.-
In this paper, constant output control of solar power generation system with instantaneous variable output is proposed. In order to get constant DC and AC voltage source, we construct Buck-Boost chopper equip with the digital I-PD type controller first. Consequently, we are able to get constant DC boltage. Next, we obtain AC source through construction PWM single phase inverter that has the constant frequency output. And we design LC filter to reduce THD(Total Harmonic Distortion). The validity of proposed control strategy is verified from results of simulation.