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J. Cent. South Univ. (2018) 25: 1708-1716 DOI: https://doi.org/10.1007/s11771-018-3862-0 Heat transfer performance testing of a new type of phase change heat sink for high power light emitting... of the developed testing system, heat transfer performance of the heat sink is tested under the condition of natural convection, upon which the influence of thermal load and working medium on the heat......
be expressed by the thermal equilibrium Gibbs distributions. Based on the Schrodinger equation, the expressions of coefficient of performance (COP) and cooling rate for the refrigerator are obtained. Effects of heat leakage on the optimal performance are discussed. The optimal performance region of the refrigeration cycle is obtained by the using of Ω objective function. The results obtained can......
performance and the secondary fluid flow of the two elastic tube bundles were all concluded and compared. The results show that the natural frequency and the critical velocity of vibration buckling of the planar elastic tube bundle are larger than those of the conical spiral tube bundle, while the stress distribution and the comprehensive heat transfer performance of the conical spiral tube bundle......
and performance evaluation of microbial collector for refractory hematite flotation YANG Huifen, LI Tian, TANG Qiongyao, WANG Chuanlong, MA Wen (State Key Laboratory for High-Efficient Mining and Safety of Metal...; flotation; screening; performance evaluation; hematite 我国赤铁矿石储量丰富,但主要以品位低,嵌布粒度细和结合形态复杂的"难选矿"形式存在.这种"贫,细,杂"的特点,使得开采出来的赤铁矿石绝大多数需要细磨到80%~90%的矿石粒度小于75 μm,个别地区矿石需细磨到90%以上的矿石粒度小于45 μm,其中的铁矿物才能获得单体解理而分选.目前,对如此细磨......
atomization technique. The morphology, hot press performance, oxidation resistance of Al-Sn pre-alloyed powder and its application in the diamond-grinding wheel was studied. The results show that the Al... is improved by using Al-Sn pre-alloyed powder. Key words: Al-Sn pre-alloyed powder; diamond tool; hot press performance ......
-acidified treatment is about 52% larger than that of EMD at -0.4V. Key words: sol-gel method; Nano-size; MnO2; electrochemical performance MnO2是一种重要的电极材料, 广泛应用于干电池, 碱锰电池, 锂锰电池等化学电源中. 开发高性能的MnO2以提高传统电... Normal University(N), 2001, 25(1): 83-85. [11]努而买买提, 夏 熙. 纳米α-MnO2的制备及其性能研究[J]. 无机材料学报, 2000, 15(5): 804-805. Nurmaimaiti, XIA Xi. Synthesis and performance of nano phase α-MnO2[J]. J Inorganic......
to the addition of Cu decreases the hardness of the coatings. Key words: AlTiN-Cu coating; cathodic arc-evaporation; microstructure; cutting performance Foundation item: Project(2014ZX04012011......
and electrochemical performance of spherical high-voltage LiNi0.5Mn1.5O4 JU Bo-wei, WANG Xian-you, WEI Qi-liang, WU Chun, YANG Xiu-kang, SHU Hong-bo, SONG Yun-feng, WEN Wei-cheng (Key Laboratory... and electrochemical performance of LiNi0.5Mn1.5O4 cathode material were investigated. XRD, SEM, charge-discharge tests and cyclic voltammetry were utilized to characterize the properties of samples. The XRD......
Effects of erbium additions on high temperature performance of high power Ni-MH batteries XIE Shou-yun(谢守韫), CHENG Yan(成 艳), JIAN Xu-yu(简旭宇), ZHU Lei(朱 磊), CHEN Hui(陈 晖), WANG Zhong(王 忠) Energy... electrode; Er-coating; high temperature performance 1 Introduction Nickel metal hydride (Ni-MH) battery has become one of the most dominant batteries due to its excellent application performance......
稳定性；减小最大静摩擦力,质量,初始容积或增大油缸作用面积,油液弹性模量,可以减小响应延时.关键词:模锻压机；非线性摩擦；超低速稳定性；等温锻造；动态性能分析Dynamic performance analysis for die-forging press machine under extremely low speedHUANG Ming-hui, LI Yi-bo, ZHANG Meng, YANG Jia-wang, LU Xin-jiang(State Key Laboratory of High Performance and Complex Manufacturing, Central South University, Changsha 410083, China)Abstract:Considering nonlinear friction, dynamic......
