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Beck’s three-parameter nonlocal exchange function along with the Lee-Yang-Parr nonlocal correlation function (B3LYP) [23-24] is employed.
M.Tian: Acta Chim.
Pu and A.M.Tian: THEOCHEM Vol.860(2008) , p.86 [8] K.
Parr and W.Yang: Density-Functional Theory of Atoms and Molecules, (Oxford University Press, New York 1989)
Lee, W.Yang and R.

The microstructure and properties of TIG welded joint of AZ31B/Cu dissimilar metal Shuangming DU, Jie Hu and Tian LAN College of Material Science and Engineering, Xi’an University of Science and Technology, Xi’an 710054, China College of Material Science and Engineering, Xi’an University of Science and Technology, Xi’an 710054, China shuangmingdu@163.com,1216790462@qq.com, 1325110658@qq.com Keywords: AZ31B/Cu dissimilar materials; TIG welding; Joint; Microstructure; Properties Abstract.
The use of magnesium automobile manufacturing industry present situation and the potential of the [J]. world nonferrous metals, 2002, (8): 16-20 [4] Huang Shao-dong, Tang Quan-bo, Zhao Zu-de, Liu Chuan-lin, Cao Yang, Zhao Jun.

[3] Tuo Tian, Zhonghua Guo, Shuaihua Ding, Mohan Hang: Ningxia Engineering Technology.
Vol. 30, No. 4 (2009), p. 18 [9] Jie Qiao, Jinghua Li, Zhirong Yang: Traffic and Computer.
[17] Yunchen Tian, Xufeng Hua: Hebei University of Technology Journal.

Ultrasonic Breaking Facility with Cooling Trub (1-ultrasonic sensor, 2-cooling liquid, 3-reaction material) 5.The method of pulse ram-type pulverization Some experts represented by Wei Tian-yu use this method to grind ultrafine powder particle of RDX, and they have the following conclusions [12]: (1) with the certain grinding pressure, the larger the mass ratio of water is, the smaller the diameter is; but if the mass ratio of RDX and water is 1:5, there is no evident change in RDX diameter. (2)with the increasing of pulse pressure, RDX diameter is gradually decreased. (3)cycle number has no evident influence on diameter with the same pulse pressure. 6.
(In Chinese) [4]FU Yan-ming,YANG Yi,LI Feng-sheng.
(In Chinese) [12]WEI Tian-yu,LI Zhi-hua,LIU Qiao-e etc.

[2] Shui L, Jin T, Tian S G, et al.
[3] Wen Zhixun, Pei Haiqing; Yang Huan.
[6] Sugui Tian, Xin Ding, Zhongge Guo, Jun Xie.

[18] Wanlin Cao, Jianwei Zhang, Baofa Tian, et al.Journal of Building Structures, 2002, 23(6):26-32, 55 (in Chinese)
[19] Wanlin Cao, Jianwei Zhang, Baofa Tian, et al.
[23] Wanlin Cao, Yabin Yang, Jianwei Zhang,et al.

[6]LI Xia; CUI Xia; HUANG Xiao-Dong; LIANG Tian-Gang.
[7]HUANG Xiao-dong; LI Xia; LIANG Tian-gang.
The effects of climate changes on the net primary productivity of natural vegetation in Tianshan Mountains, edtied by Pratacultural Science, Vol. 26(02) (2009),p.11-18 [10]LIU Yan; LI Yang; CUI Cai-xia.

Ecology and Environmental Sciences，2011,20（2）：384~388(In chinese) [9] Cairong Wang, Hongxiao Tian,Shengxi Li.
Nitrous oxide emissions from soil and strategy for reducing N2O Emission.Soil Aad Environmental Sciences,2001,20（2）：143~148(In chinese) [10] Xiuhong Liu, Qing Yang,Changyong Wu etc.
Acta Scientiae Circumstantiae, 2006,26(12):1940~1947(In chinese) [11] Dongju Zhang, Junwei Liu ,Binghui Tian.

Tian et al. [8] explained that the deposit of TiO2 washed with distilled water and ethanol in a centrifugal machine, filtrated, then dried at 120oC for 5 hours tended to be bound together, resulting in the aggregation of particles.
Tian, Z.
[1] P.Yang, D.

Tian, K.
Yang, Y.
Tian, F.