http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Isomer spectroscopy of neutron-rich <sup>168</sup>Tb<sub>103</sub>
Gurgi, L.A.,Regan, P.H.,Sö,derströ,m, P.-A.,Watanabe, H.,Walker, P.M.,Podolyá,k, Zs.,Nishimura, S.,Berry, T.A.,Doornenbal, P.,Lorusso, G.,Isobe, T.,Baba, H.,Xu, Z.Y.,Sakurai, H.,Sumikama Elsevier 2017 Radiation physics and chemistry Vol.140 No.-
<P>In-flight fission of a 345 MeV per nucleon U-238 primary beam on a 2 mm thick Be-9 target has been used to produce and study the decays of a range of neutron-rich nuclei centred around the doubly mid-shell nucleus Dy-170 at the RIBF Facility, RIKEN, Japan. The produced secondary fragments of interest were identified event by-event using the BigRIPS separator. The fragments were implanted into the WAS3ABI position sensitive silicon active stopper which allowed pixelated correlations between implants and their subsequent beta-decay. Discrete gamma-ray transitions emitted following decays from either metastable states or excited states populated following beta decay were identified using the 84 coaxial high-purity germanium (HPGe) detectors of the EURICA spectrometer, which was complemented by 18 additional cerium-doped lanthanum bromide (LaBr3) fast-timing scintillation detectors from the FATIMA collaboration. This paper presents the internal decay of a metastable isomeric excited state in the odd-odd nucleus Tb-168, which corresponds to a single proton-neutron hole configuration in the valence maximum nucleus Dy-170. These data represent the first information on excited states in this nucleus, which is the most neutron-rich odd-odd isotope of terbium (Z=65) studied to date. Nilsson configurations associated with an axially symmetric, prolate-deformed nucleus are proposed for the Tb-168 ground state the observed isomeric state by comparison with Blocked BCS-Nilsson calculations.</P>
Xu, Z.,Lagg, A.,Solanki, S.,Liu, Y. IOP Publishing 2012 The Astrophysical journal Vol.749 No.2
<P>Vector magnetic fields of an active region filament in the photosphere and upper chromosphere are obtained from spectro-polarimetric observations recorded with the Tenerife Infrared Polarimeter (TIP II) at the German Vacuum Tower Telescope. We apply Milne-Eddington inversions on full Stokes vectors of the photospheric Si I 1082.7 nm and the upper chromospheric He I triplet at 1083.0 nm to obtain the magnetic field vector and velocity maps in two atmosphere layers. We find that (1) a complete filament was already present in H alpha at the beginning of the TIP II data acquisition. Only a partially formed one, composed of multiple small threads, was present in He I. (2) The AR filament comprises two sections. One shows strong magnetic field intensities, about 600-800 G in the upper chromosphere and 800-1000 G in the photosphere. The other exhibits only comparatively weak magnetic field strengths in both layers. (3) The Stokes V signal is indicative of a dip in the magnetic field strength close to the chromospheric PIL. (4) In the chromosphere, consistent upflows are found along the PIL flanked by downflows. (5) The transversal magnetic field is nearly parallel to the PIL in the photosphere and inclined by 20 degrees-30 degrees in the chromosphere. (6) The chromospheric magnetic field around the filament is found to be in normal configuration, while the photospheric field presents a concave magnetic topology. The observations are consistent with the emergence of a flux rope with a subsequent formation of a filament.</P>
Optimal Stator-Current Trajectory Control of an IPM Synchronous Machine for Hybrid Electric Vehicles
Z. Xu,R. Datta,G. X.Yin,Dianguo Xu 전력전자학회 2011 ICPE(ISPE)논문집 Vol.2011 No.5
This paper describes an optimal stator-current control strategy for an Integrated Starter-Alternator (ISA) prototype. Based on the applications of hybrid electric vehicles with wide constant power speed range, this paper investigates the various operation stages for the interior permanent magnet machine, including the maximum torque per ampere (MTPA), flux weakening control and maximum output power stage. A control algorithm was proposed to optimize the stator-current trajectories. Through the algorithm, the d-axis and q-axis components of the stator current were driven on the optimal trajectories to produce the desired torque and to maintain system stability under the voltage limit and current limit. The system takes full advantage of the capacity of the driving converter, and the maximum output torque was generated by the motor at any time. The reliability and dynamic performance of system were rather satisfactory. Energy optimization was achieved. The results from simulation and the real platform experiment verify the feasibility and advantages of the system.
Improved Enzymatic Synthesis of N-carbamoyl-D-phenylalanine with In situ Product Recovery
Z. Zhou,Z. Yao,H. Q. Wang,H. Xu,P. Wei,P. K. Ouyang 한국생물공학회 2011 Biotechnology and Bioprocess Engineering Vol.16 No.3
D-hydantoinase from Burkholderia cepacia was purified and immobilized onto EAH Sepharose 4B using the carbodiimide method. The enzymatic process for the production of N-carbamoyl-D-phenylalanine via the hydantoinase method was conducted using a special packedbed reactor connected to a DEAE Sepharose FF column for in situ product recovery. This novel apparatus was shown to be effective for pH control, thereby improving the conversion rate. At 40℃, 1.0 g/L substrate concentration,and 10/100 mL adsorbent concentration, the conversion rate of D,L-benzyl hydantoin was 62.7% after the reaction for 14 h, representing an 89.4% increase when compared with that obtained using a packed-bed reactor.