http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
FUZZY TORQUE CONTROL STRATEGY FOR PARALLEL HYBRID ELECTRIC VEHICLES
PU J.-H.,YIN C.-L.,ZHANG J.-W. The Korean Society of Automotive Engineers 2005 International journal of automotive technology Vol.6 No.5
This paper presents a novel design of a fuzzy control strategy (FCS) based on torque distribution for parallel hybrid electric vehicles (HEVs). An empirical load-regulating vehicle operation strategy is developed on the basis of analysis of the components efficiency map data and the overall energy conversion efficiency. The aim of the strategy is to optimize the fuel economy and balance the battery state-of-charge (SOC), while satisfying the vehicle performance and drivability requirements. In order to accomplish this strategy, a fuzzy inference engine with a rule-base extracted from the empirical strategy is designed, which works as the kernel of a fuzzy torque distribution controller to determine the optimal distribution of the driver torque request between the engine and the motor. Simulation results reveal that compared with the conventional strategy which uses precise threshold parameters the proposed FCS improves fuel economy as well as maintains better battery SOC within its operation range.
FUZZY TORQUE CONTROL STRATEGY FOR PARALLEL HYBRID ELECTRIC VEHICLES
J.-H. PU,C.-L. YIN,J.-W. ZHANG 한국자동차공학회 2005 International journal of automotive technology Vol.6 No.5
This paper presents a novel design of a fuzzy control strategy (FCS) based on torque distribution for parallel hybrid electric vehicles (HEVs). An empirical load-regulating vehicle operation strategy is developed on the basis of analysis of the components efficiency map data and the overall energy conversion efficiency. The aim of the strategy is to optimize the fuel economy and balance the battery state-of-charge (SOC), while satisfying the vehicle performance and drivability requirements. In order to accomplish this strategy, a fuzzy inference engine with a rule-base extracted from the empirical strategy is designed, which works as the kernel of a fuzzy torque distribution controller to determine the optimal distribution of the driver torque request between the engine and the motor. Simulation results reveal that compared with the conventional strategy which uses precise threshold parameters the proposed FCS improves fuel economy as well as maintains better battery SOC within its operation range.
Impact of a compound drop on a dry surface
R. H. Chen,M. J. Kuo,S. L. Chiu,J. Y. Pu,T. H. Lin 대한기계학회 2007 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.21 No.11
The impact of a water-in-oil compound drop on a dry quartz surface was studied. The impact outcomes depended on a core-to-overall mass ratio and a Weber number. For a Weber number less than 570 and a core-to-overall mass ratio ranging from 0.07 to 0.7, five collision patterns were observed: complete deposition, shell deposition with core partial rebound, shell splash with core-shell deposition, shell splash with core partial rebound, and shell splash with core-shell partial rebound. Past research has indicated that the splash phenomenon depends strongly on liquid properties such as surface tension and viscosity in addition to the properties of the solid surface and the surrounding gas. The liquid properties in a compound drop were made non-uniform by the presence of additional interfaces in the interior of the liquid drop.
Jing Pu,Chan, D.S.H.,Sun-Jung Kim,Byung Jin Cho IEEE 2009 IEEE transactions on electron devices Vol.56 No.11
<P>Aluminum-doped gadolinium oxides GdAlO<I>x</I> are proposed as a blocking oxide layer in charge-trap-type flash memory cell devices. Greatly improved operation speed and charge retention properties have been demonstrated, compared to conventional Al<SUB>2</SUB>O<SUB>3</SUB> blocking layer. The optimization of Al percentage in GdAlO<I>x</I>, as well as charge loss mechanism in the memory cell device, has also been systematically studied.</P>
Song, Yoogeun,Pu, Hung-Yi,Hirotani, Kouichi,Matsushita, Satoki,Kong, Albert K. H.,Chang, Hsiang-Kuang Oxford University Press 2017 Monthly notices of the Royal Astronomical Society. Vol.471 No.1
<P>We investigate the acceleration of electrons and positrons by magnetic-field-aligned electric fields in the polar funnel of an accreting black hole (BH). Applying the pulsar outer-gap theory to BH magnetospheres, we find that such a lepton accelerator arises in the immediate vicinity of the event horizon due to frame-dragging, and that their gamma-ray luminosity increases with decreasing accretion rate. Furthermore, we demonstrate that the gamma-ray flux is enhanced along the rotation axis by more than an order of magnitude if the BH spin increases from a = 0.90M to a = 0.9999M. As a result, if a ten-solar-mass, almost-maximally rotating BH is located within 3 kpc, when its accretion rate is between 0.005 and 0.01 per cent of the Eddington rate, its high-energy flare becomes detectable with the Fermi/Large Area Telescope, provided that the flare lasts longer than 1.2 months and that we view the source nearly along the rotation axis. In addition, its very high energy flux is marginally detectable with the Cherenkov Telescope Array, provided that the flare lasts longer than a night and that our viewing angle is about 45 deg with respect to the rotation axis.</P>
Sung, M.,Chubachi, H.,Sato, R.,Shin, M. K.,Kwon, S. K.,Pu, Y. J.,Kim, Y. H. Royal Society of Chemistry 2017 Journal of Materials Chemistry C Vol.5 No.5
<P>New deep blue emitters containing an sp(3)-hybridised tetrahedral silicon core with dimethyl groups, 9,10-biarylanthracene, and pyrene were synthesised. The pyrene group, with planar pi-conjugation and a slightly larger energy gap than that of anthracene, is expected to work as an intramolecular host group in organic light emitting diodes (OLEDs). Density functional theory (DFT-B3LYP) and time-dependent DFT calculations for molecular orbitals and excited states of pyrene and anthracene units showed the possibility of intramolecular energy transfer and a triplet-triplet annihilation (TTA) process. The maximum external quantum efficiencies (EQEs) of non-doped devices using PA1N and PA2N were 4.7% and 4.8%, respectively, while the maximum EQEs of doped devices using PA1N and PA2N as dopants (3 wt%) were 4.5% and 3.6%, respectively. The EQE of the non-doped device with a low photoluminescence quantum yield (PLQY) (14%) was higher than that of the doped device with a high PLQY (74%), which resulted from the existence of a contribution reproducing radiative S-1 excitons from nonradiative T-1 excitons in the non-doped devices. Both non-doped and doped devices using PA1N and PA2N showed high color pure blue emission. [ Commission Internationale de l'Eclairage coordinates, CIE (x,y), of the non-doped device were (0.16,0.08) for PA1N and (0.15,0.10) for PA2N.]</P>
Liu, J.,Zhang, D.,Pu, X.,Dong, D.,Cai, P.,Seo, H.J. North-Holland 2014 Materials letters Vol.130 No.-
Magnetically separable Zn<SUB>1-x</SUB>Cd<SUB>x</SUB>S/γ-Fe<SUB>2</SUB>O<SUB>3</SUB> (x=0-1) photocatalysts were synthesized by a one-step combustion method. The structures, morphologies, absorbance, optical and photocatalytic properties of the samples were studied by X-ray powder diffraction, scanning electron microscopy, transmission electron microscopy, ultraviolet-visible spectrophotometry and photoluminescence. The experimental results show that the formation of hexagonal Zn<SUB>1-x</SUB>Cd<SUB>x</SUB>S and γ-Fe<SUB>2</SUB>O<SUB>3</SUB> and the combination of them were one-pot achieved. The Cd<SUP>2+</SUP> content has a significant influence on the absorbance of visible light and fluorescence properties. The magnetic properties of samples ensure the magnetic separation by using a magnet. CdS/γ-Fe<SUB>2</SUB>O<SUB>3</SUB> shows the best photocatalytic performance compared with other samples, ascribed to its small energy band gap and matching energy band structure between CdS and γ-Fe<SUB>2</SUB>O<SUB>3</SUB>. Moreover, no obvious deterioration was observed in the stability tests.