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SMOOTHING METHOD OF AUTO-BODY PART CONTOUR FOR THE DIE-FACE DESIGN SYSTEM BASED ON THE CAE PLATFORM
K. J. GONG,W. GUO,P. HU 한국자동차공학회 2006 International journal of automotive technology Vol.7 No.7
The method of die-face design based on the CAE platform for automobile panels can fast modify the die addendum. In contrast with the process of the die-face design based on the CAD platform, there are some special steps for the die-face design based on the CAE platform. The most obvious difference is that the auto-body part contour needs smoothing earlier than the design of addendum surfaces does. It is helpful to improve the design quality of addendum surface. In spite of extensive researches on the smoothing technique, there is still dearth of the published solutions about smoothing the part contour with additional surface. This paper attempts to analyze the difficulties and provides practical solutions. Main results include the algorithm to calculate the segments needing to be smoothed on boundary, the strategy to create the smoothing curve and the procedure of surface generation. The relevant function modules for parametric design are developed. A few examples and suggestions for future work conclude the paper.
FABRICATION OF 0.4μm GATE PHEMT USING CONVENTIONAL OPTICAL LITHOGRAPHY
Gong,M. K.,Yoon,J. W.,Cho,S. G.,Joo,Y. D.,Lee,S. W.,Lee,J. W. 대한전자공학회 1995 ICVC : International Conference on VLSI and CAD Vol.4 No.1
An optical sub-micron gate process is developed using the dielectric side wall The fabricated gate length is 0.4 fin. The application of this sub-micron process to PHEMT shows good characteristics. Using this sub-micron gate process, the 0.4 ㎛ x 200㎛ gate PHEMT was fabricated By the measurements I _(dss) is 150 mA/mm, g^(int)_(m,max) is 566 mS/mm, f_t is 38 GHz, f_(max) 60 GHz. Also, F_(min) is 0.87 dB, G_(a,asso) is 9.8 dB at 12 GHz Thus the fabricated PHEMT is applicable in the C to X band frequency areas. Also the developed optical sub-micron gate process will need the lowest cost in the fabrication of the commercial devices and MMIC's.
에멀전연료인 Orimulsion<SUP>®</SUP>의 특성 및 감식기법연구
이완섭(W.S. Lee),윤주용(J.Y. Yoon),김한규(H.G. Kim),공정호(J.H. Gong) 한국해양환경·에너지학회 2004 한국해양환경·에너지학회 학술대회논문집 Vol.2004 No.-
Orimulsion<SUP>®</SUP>, a fuel manufactured by Venezuelar PDVSA-BITOR, is an emulsion of natural bitumen(approximately 70%), freshwater(approximately 30%), and surfactant package(<0.2%). Orimulsion-400 is the most current formulation of the fuel. The Orimulsion was characterized by capillary GC/FID and GC/MS in order to obtain a hydrocarbon fingerprint and PAH patterns of the bitumen. The GC/FID chromatogram of Orimulsion is remarkable in that it show an absence of n-alkane hydrocarbons and large unresolved mass. But GC/MS ion chromatogram show PAHs, alkylated PAH compounds and dibenzothiophene patterns. Orimulsion products have never been spilled into the marine environment but should an accidental spill occur, contingency plans and clean up equipment are available for response. If Orimulsion is accidentally spilled into the aquatic environment, the water phase(30 percent freshwater) will Quickly dilute into the surrounding water and the bitumen particles will disperse throughout the water column.