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Introduction Friction stir welding represents a welding technique with which to weld materials without reaching the fusion of the material.
Sazgari, Microstructural and mechanical properties of friction stir welded aluminum/copper lap joints, Journal of Alloys and Compounds 460 (2008) 535–538 [4] Bo Li, Yifu Shen, A feasibility research on friction stir welding of a new-typed lap–butt joint of dissimilar Al alloys, Materials and Design, Materials and Design 34 (2012) 725–731 [5] M.
Kokabi, Microstructure evolutions after friction stir welding of severely deformed aluminum sheets, Materials and Design 40 (2012) 364–372 [6] S.J.
Wang, Evaluation of formability and material characteristics of aluminum alloy friction stir welded tube produced by a novel process¸ Materials Science and Engineering A 543 (2012) 210– 216 [7] G.
Prisco, Friction stir welding of lap joints: Influence of process parameters on the metallurgical and mechanical properties, Materials Science and Engineering A 519 (2009) 19–26 [8] X.

Materials and Methods Fig. 1 Monthly precipitation distribution during maize growth periods Experimental site description.
We are also thankful to the support from Gansu Provincial Key Lab of Aridland Crop Science, Gansu Agricultural University.
Journal of Zhejiang University (Agric. & Life Sci.)
Journal of Soil and Water Conservation Vol. 16(4) (2002), p. 102-104 (in Chinese)
Chinese Journal of Agrometeorology Vol. 21(3) (2000), p. 39-41 (in Chinese)

Schwartz, “Direct Cortical Control of 3D Neuroprosthetic Devices,” Science, vol. 296(5574), 2002, pp. 1829-1832
Tameesh, "Visual and electrical evoked response recorded from subdural electrodes implanted above the visual cortex in normal dogs under two methods of anesthesia," Journal of Neuroscience Methods, vol.123(2), 2003, pp. 129-137
Moran, "A brain-computer interface using electrocorticographic signals in humans," Journal of Neural Engineering, vol.1(2), 2004, pp. 63-71
Desain, "The brain-computer interface cycle," Journal of Neural Engineering, vol. 6(4), 2009, pp. 041001-041010
[14] Qing Zhi Du, Yi Peng, Xiu Mei Yang and Qiu Ping Yang, "The Research of CR’s Application for Bluetooth Network," Advanced Materials Research, vol.658, 2013, pp. 574-577

Model calculation and analysis of geological environmental capacity in Qian'an Mining District Zhengsheng Li 1 a, Wensheng Liu 2,b , Haoran Guo3,c 1,3 Civil and Environmental Engineering School, University of Science and Technology Beijing,Beijing,100083,China 2 Nanshan Mining Co，Ma Steel Group, MaAnshan, 243000, China lizhengsheng0512@163.com Keywords: analytic hierarchy process, relative surplus rate, environmental bearing capacity, sustainable development Abstract.
Introduction Qian'an mining area is the raw material base of ShouGang Mining Company, has more than 50 years mining history , the main mining area in Qianxi ,One country of Qian'an City , Hebei Province , with the long-term mining , the main stope resources has gradually depleted with the ecological environment deterioration and the sharp contradictions between mine area and Qian'an City development , This paper puts forward the geological environment loading capacity evaluation model and the evaluation index system based on the theoretical of geological environment loading capacity , the optimal solution is determined by calculating for the rational use of mining resource with reasonable overall planning of the mine , which provides scientific basis for promoting to realize the sustainable development of Qian'an Mining area.
Bai [J].Chinese Journal of Eco-Agriculture, 2010,18(2):422~427
Du, J.Ding, P.Jing, [J].Xianyang Teachers'College Journal, 2005,20(2):38~42 [5] CH.ZH.Chang, Sanitation science and technology network, 2010
[7] SH.Yang, Y.Chu, X.K.Yang,B.J.Lou,geological buttetin of china,2005, 24(5) [8] Q.Xu, Journal of Natural Resources ,1996，11（2）：135~14

The selection of computation parameter According to the soil physical and mechanical parameters of geotechnical engineering investigation report, the range of Clock Tower - South Gate of Xi'an Subway line two, proper simplification, the properties are similar to those of the soil were merged, divided 5 layers of soil, and take out the corresponding layer soil parameters and supporting segment parameters, are given in table 1 and shown in table 2: Table 1 Supporting material physical and mechanical parameters statistics Material Density (kg/m3) Modulus of elasticity (Mpa) Poisson's ratio Thickness (cm) Segment 2450 3450 0.17 30 Table 2 Soil physical mechanics parameter table Layer name Thickness (m) Density (kg/m3) Bulk modulus (MPa) Shear modulus (MPa) Cohesive force (kPa) Internal friction angle (°) Poisson's ratio Miscellaneous fill 2 1875 5.44 3.27 11.0 12.5 0.25 Plain fill 2 1780 7.80 3.60 14.5 19.5 0.28 New loess 4 1870 4.90 2.30 24.0 16.0 0.30 Old loess 7 2010
Xi’an University of Science and Technology, 2011,03 (2) :157-162.
Journal of Tianjin University, 2006, 39(2): 188-193.
[4] Qingan Hu, Yongxu Xia, Wenzheng Wang. 3D numerical simulation on double-arch tunnel’s construction process[J].Journal of Chang’an University(Natural Science Edition), 2005, (1): 48-51, 76.
Journal Of Shen Yang University, 2010, 2 (1): 11-14.

The phenomenon of releasing quickly local energy and generating transient elastic wave in materials is called AE.
SKLT08A06) and the National Natural Science Foundation of China (No. 50975157).
Chinese Journal of Mechanical Engineering, 2002, 38(3):139-143
Chinese Journal of Mechanical Engineering, 2009, 45(2):273-278
China Engineering Science, 2008, 10(11):68-75.

Analysis on difficulties and measures of the age of big data brings to the enterprise competitive intelligence Wei Chen1, a,Ma Ran2, b,Wang Xiaodi3,c 1-3Beijing Institute of Science and Technology Information, Beijing, China,100048 a cane8882004@sohu.com b mr2008890306@163.com c sweetypei@hotmail.com Keywords: big data; competitive intelligence; enterprises Abstract.As IDC predicts, the global data size stored in electronic form will boost 44 times and reach 35ZB in 2020.
Therefore, the competitive intelligence which serves for enterprises is supported by raw materials which are constantly extracted by massive information in era of big data.
Chinese Journal of Computers, 2011(34). .
Journal of Information, 2009(7). ].
Journal of Intelligence, 2011 (7)

Currently a variety of tunnel diseases frequently occur because of many shortcomings left over during the tunnel construction, lining material degradation and the effect of the groundwater and other reasons after the tunnel put into operation.
Qi: Journal of Engineering Geology, Vol. 18 (2010), p. 963, In Chinese
Jiang: Chinese Journal of Rock Mechanics and Engineering, Vol. 29 (2010), p. 3641, In Chinese
Zhang: Journal of Railway Engineering Society, Vol. 9(2007), P. 17, In Chinese
[10]China Academy of Railway Sciences: Research Report on Detecting Technology and Equipment for State of Railway Tunnel Lining, (2010), In Chinese.

Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, 131, 12(2000), pp. 3041-3052
Materials Science and Engineering: A Vol. 475 (2008), pp. 336-342
Materials Science and Engineering: A Vol. 407 (2005), pp. 234-244
Materials Science and Engineering: A, Vol. 438–440 (2006), pp. 281-284
JOURNAL OF MATERIALS SCIENCE Vol. 40 (2005), pp. 3629- 3633

Mineral Sequestration of CO2 Using Basic Oxygen Furnace (BOF) Steelmaking Slag Guo Jun Maa, Hui Tangb and Yibiao Jinc Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, P.
It is advantage to use BOF steelmaking slag to fix CO2, such as large volume of BOF steelmaking slag, low price of raw materials, close to the CO2 emission sources, and no secondary pollution.
Materials and Experimental Materials and leaching process.
An: Journal of Chinese Rare Earth Society Vol. 26(2008), p.95(in Chinese) [4] S.