http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Xia, M.,Tang, Z.,Kim, W.S.,Yu, T.,Park, B.J. North-Holland Pub. Co 2017 Journal of crystal growth Vol.469 No.-
In the synthesis of nanoparticles, the reaction rate is important to determine the morphology of nanoparticles. We investigated morphology evolution of Cu nanoparticles in this two different reactors, microemulsion reactor and batch reactor. In comparison with the batch reactor system, the enhanced mass and heat transfers in the emulsion system likely led to the relatively short nucleation time and the highly homogeneous environment in the reaction mixture, resulting in suppressing one or two dimensional growth of the nanoparticles. We believe that this work can offer a good model system to quantitatively understand the crystal growth mechanism that depends strongly on the local monomer concentration, the efficiency of heat transfer, and the relative contribution of the counter ions (Br<SUP>-</SUP> and Cl<SUP>-</SUP>) as capping agents.
Enhanced Mechanical Properties of Orthorhombic Ti₂AlNb-Based Intermetallic Alloy
Hagiwara, M.,Emura, S.,Araoka, A.,Kong, B.O.,Tang, F. 대한금속재료학회 2003 METALS AND MATERIALS International Vol.9 No.3
Attempts were made to improve the mechanical properties of an orthorhombic Ti₂AlNb-based Ti-22Al-27Nb intermetallic alloy through microstructural and compositional modifications, and the dispersion of fine TiB particulates. A Ti-22Al-27Nb alloy with a prior B2 grain size ranging from 8 mm to 49 ㎛ was successfully obtained using spherical α₂particles as obstacles to grain growth. The finest grained material showed an excellent combination of room temperature tensile strength (around 1,000 MPa) and tensile ductility (more than 15 %). Transition metal elements such as Mo, V and W for a portion of the Nb in the Ti-22Al-27Nb were substituted. The guideline for this compositional modification required that the beta phase stability in the modified alloy be equal to that of the Ti-22Al-27Nb. It was found that the substitution of 2 % W for 7 % Nb was quite effective in increasing tensile strength at temperatures above 923 K and reducing the steady state creep rate and primary creep strain. The Ti-22Al-27Nb alloy-based particulate composites reinforced with 6.5 % TiB were successfully produced with the gas atomization P/M method. The dispersion of extremely small TiB was very uniform. Most of the mechanical properties of the composites, including the yield stress, tensile strength, Young's modulus, resistance to creep, and high cycle fatigue strength were greatly superior to those of the matrix alloy.
Tang, W.K.,Wong, K.B.,Lam, Y.M.,Cha, S.S.,Cheng, C.H.K.,Fong, W.P. North-Holland Pub ; Elsevier Science Ltd 2008 FEBS letters Vol.582 No.20
The crystal structure of seabream antiquitin in complex with the cofactor NAD<SUP>+</SUP> was solved at 2.8A resolution. The mouth of the substrate-binding pocket is guarded by two conserved residues, Glu120 and Arg300. To test the role of these two residues, we have prepared the two mutants E120A and R300A. Our model and kinetics data suggest that antiquitin's specificity towards the substrate α-aminoadipic semialdehyde is contributed mainly by Glu120 which interacts with the α-amino group of the substrate. On the other hand, Arg300 does not have any specific interaction with the α-carboxylate group of the substrate, but is important in maintaining the active site conformation.
The <i>Gaia</i>-ESO survey: the inner disk intermediate-age open cluster NGC 6802
Tang, B.,Geisler, D.,Friel, E.,Villanova, S.,Smiljanic, R.,Casey, A. R.,Randich, S.,Magrini, L.,San Roman, I.,Muñ,oz, C.,Cohen, R. E.,Mauro, F.,Bragaglia, A.,Donati, P.,Tautvaiš,ien*error*& Springer-Verlag 2017 Astronomy and astrophysics Vol.601 No.-
Inductances of a Superconducting Magnet for Cyclotron K120
Tang, H.M.,Kim, D.L.,Choi, Y.S.,Lee, B.S.,Yang, H.S.,Kim, Y.S. The Korean Society of Superconductivity and Cryoge 2008 한국초전도저온공학회논문지 Vol.10 No.4
The design of a superconducting magnet system producing very high magnetic field is underway at Korea Basic Science Institute (KBSI) to accelerate three kinds of carbon irons (C+2, C+4, C+6) to 120 MeV. A quarter-scaled prototype will be manufactured in order to confirm the feasibility of our design. Magnet Inductances in the system have a great influence on the current ramping rates and contribute to the stored energy, which are usually considered to be unfavorable in magnet operation. The modeling and simulation scheme of a prototype superconducting magnet for the cyclotron K120 is described in this paper. The inductances are calculated by a numerical method with and without iron yokes, respectively. These calculation results will be used as engineering design details such as a current ramping rate and a quench protection design.
최연석(Y.S.Choi),Hongming Tang,김동락(D.L.Kim),양형석(H.S.Yang),이병섭(B.S.Lee) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11
The design of thermal radiation shield cooled by a cryocooler is presented. This study is motivated mainly by our recent development of prototype superconducting magnet system for the Cyclotron K120. The superconducting magnet system is composed of the magnet cryostat, transfer line and supply cryostat. In order to minimize thermal radiation load, the superconducting coil form in the magnet cryostat is enclosed by the thermal radiation shield which is thermally connected to the first-stage cold head of a two-stage cryocooler in the supply cryostat. Since the supply cryostat is located far from the magnet cryostat large temperature gradient along the thermal shield is unavoidable. In this paper, the thermal radiation shield is optimized to minimize temperature gradient with taking into account the cryogenic load, system structure and electrical load. The effect of heat source from thermal conduction through mechanical supports on the temperature distribution of thermal radiation shield is also discussed.