http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Xiangfan Fang,Marco Grote 한국자동차공학회 2017 International journal of automotive technology Vol.18 No.5
The main objective of this paper is to introduce a novel method to develop a multi-material body-in-white concept with composite material or hybrid material system. A new method based on the work of Durst (2008) is presented, which works basically in three steps. In the first step, the anisotropy of the components is analyzed to pre-evaluate the potential of FRP-suitable parts. In the second step, the predominating orientation of every finite element is determined and clustered to get a first impression of an appropriate laminate architecture. In the last step, a suitable design with a preliminary stacking sequence is calculated. To prove the feasibility of this method, it has been applied to simple flat coupons and a body-in-white component to show that the method leads to reasonable results.
EFFECT OF EXTERNAL ELECTRICAL STIMULI ON DNA-BASED BIOPOLYMERS
GURU SUBRAMANYAM,CARRIE M. BARTSCH,JAMES G. GROTE,RAJESH R. NAIK,LAWRENCE L. BROTT,MORLEY STONE,ANGELA CAMPBELL 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2009 NANO Vol.4 No.2
Biopolymers, such as deoxyribonucleic acid-hexadecyltrimethyl ammonium chloride (DNA-CTMA) and bovine serum albumin-polyvinyl alcohol (BSA-PVA), were studied using a novel capacitive test structure. A variety of external electrical stimuli were applied, including a low frequency alternating current signal and a rf/microwave frequency signal combined with a DC bias. The dynamic responses of the DNA-based biopolymer to the external stimuli are presented in this paper. The electrical transport measurements support the space-charge-limited conduction and the low frequency capacitance–voltage (CV) measurements showed large depletion layer capacitance at the Au–biopolymer interface, at 20 Hz, and the capacitance approaching bulk values at 1 MHz. Electric force microscopy (EFM) was utilized for visualization of charge dynamics and to examine the effect of DC bias combined with an AC signal. Ionic charges in the DNA-CTMA system seem to be responsible for the dynamic response to the various external electrical stimuli.
Kwon, Han Chang,Kim, Minho,Grote, Jan-Philipp,Cho, Sung June,Chung, Min Wook,Kim, Haesol,Won, Da Hye,Zeradjanin, Aleksandar R.,Mayrhofer, Karl J. J.,Choi, Minkee,Kim, Hyungjun,Choi, Chang Hyuck American Chemical Society 2018 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.140 No.47
<P>Carbon monoxide is widely known to poison Pt during heterogeneous catalysis owing to its strong donor-acceptor binding ability. Herein, we report a counterintuitive phenomenon of this general paradigm when the size of Pt decreases to an atomic level, namely, the CO-promoting Pt electrocatalysis toward hydrogen evolution reactions (HER). Compared to pristine atomic Pt catalyst, reduction current on a CO-modified catalyst increases significantly. Operando mass spectroscopy and electrochemical analyses demonstrate that the increased current arises due to enhanced H<SUB>2</SUB> evolution, not additional CO reduction. Through structural identification of catalytic sites and computational analysis, we conclude that CO-ligation on the atomic Pt facilitates H<SUB>ads</SUB> formation via water dissociation. This counterintuitive effect exemplifies the fully distinct characteristics of atomic Pt catalysts from those of bulk Pt, and offers new insights for tuning the activity of similar classes of catalysts.</P> [FIG OMISSION]</BR>