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Research on sensitivity of soil acidification in Hebei plain，North China Xiaoyu Li1, Shengxia Fu2, Taizhong Gao3* 1.2.3.Key Laboratory of Biological Technology for Containment Prevention in Hebei Province,School of Environmental Science & Engineering; Hebei University of Science & Technology Shijiazhuang050018,China 1email:qxiaoyuli@163.com, 2email:qshengxiafu@163.com, 3email:taizhonggao@163.com *Corresponding author Keywords: soil acidification; sensitivity of soil acidification; fluvo-aquic soil; cinnamon soil；Hebei Plain Abstract.
Acknowledgements This work was supported by grants from the National Natural Science Foundation of China (No.41373096) and Key Laboratory of Biological Technology for Containment Prevention in Hebei Province, China.
Spatio-temporal variation of soil acidification in hilly red soil croplands [J].Chinese Journal of Eco-Agriculture, Nov. 2008, 16(6): 1348- 1351.In Chinese
Communications in Soil Science and Plant Analysis,2008,39：5-6
Variation of groundwater quality and influence of pesticide and fertilizer on Hebei Plain[J].South-to-North Water Transfers and Water Science & Technology,2009,7（2）:50-54.In Chinese.

Effect of Nitrogen on Microstructure and Properties of a Cast Cobalt-Base Superalloy Chao YUANa, Jianting GUOb, Lanzhang ZHOUc Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, P.
Introduction Nitrogen (N)，as a detrimental element in superalloys， is not easily removed even during vacuum induction melting (VIM), and usually is controlled by selecting raw materials for minimizing the N level [1].
For getting the virgin alloy with low N, the purified raw materials were melted at a temperature of 15800C for 10min, and then cast into metal moulds in a vacuum of 1.2 Pa to get the virgin alloy bar stock with the weight of 18kg.
Tensile tests with a strain rate of 2×10-5 s-1 were conducted on an AG-5000A Tensile Machine at room temperature and on a DCX-25T Material Testing Machine at 9000C, respectively.
Technol., Vol. 18 (2002), p.1041 [10] Yuan Chao, Guo Jianting, Zang Zhixin, Lai Wanhui, Liu Yiming, and Li Hongliang, The Chinese Journal Nonferrous Metals Vol. 16 (2006), p.453 [11] A.M.Beltran, in: Superalloys II, edtied by C.T.Sims, et al, John Wiley and Sons, New York (1987), p.135 [12] F.M.Yang, X.F.Sun, H.R.Guan, and Z.Q.Hu: Mater.

Ultrasonic wave propagation is an ideal interrogation method because ultrasound is the elastic vibration of the material itself and is thus directly affected by any structural damage occurring in the paths of the propagating waves.
EXPERIMENTAL 3.1 System overview and pitch-catch method set-up The specimen used in this experiment was made of Fiberglass pre-impregnated material containing 30 plies and having an overall thickness of 8.39mm (Figure 2).
CONCLUSION AND FUTURE WORK In this paper, we have presented support vector machine approach for the automatic analysis of internal defects of composite materials.
E., “Acoustic-ultrasonics to assess material and structural proper- ties," tech. rep., NASA/CR-2002-211881, 2002, [4] Kwon, O.
[12] Chih-Wei Hsu, Chih-Chung Chang, Chih-Jen Lin, A Practical Guide to Support Vector Classification, Technical Report, Department of Computer Science, National Taiwan University, 2008

The collision-prevention device named steel tubular truss in the thesis is made of angle steel and circular steel tube, which buffers taking advantage of the buckling deformation from angle steel and the bending deformation from circular steel tube.But actually,there are so many uncertain factors that make it difficult to analyse exactly when he ship impacts the steel tubular truss, such as the tonnage of ship, the shape of stem, the speed of collision, the location of collision, the angle of collision, the fluctuation of water level, the material of steel tubular truss and the differences of structural form and so on.
However,The Finite Element method is all admitted the most effective method at present,which can consider the big deformation , the touch , the nonlinear of material and avulsion，which can exactly calculate the relationship of deformation and coupling force in structure.
The body of ship will use the rigid material and the parameters are shown in table 2.The kinematic plastic material[4]-[5]related with strain rate applied for the Collision-Prevention Device is shown in table 3.
Journal of Ship Reaearch[J],1959,3(2):1-4 [2] Paik J.K,Petersen P.T.Modelling of the Internal Mechanics in Ship Collisions, Ocean Engineering,1996,23(2):107-142
LS-DYNA3D Theory Foundation and Examples[M].Beijing:Science Press.2005.5 [6] L.Luo.Ship-bridge Collision Theories and Analysis on Anti-collision Equipment of Lie-de Bridge[D].Changsha: Changsha University of Technology,2008.

Calculation model and parameters In this paper, the material of underground penstock steel tube is 16MnR, adopting the minimum wall thickness [6].
The mechanical properties of materials are shown in table 1.
Table 1 Material mechanics parameters Material name Material model Bulk density [kN/m3] Modulus of elasticity [GPa] Poisson's ratio Compressive strength [MPa] Tensile strength [MPa] Steel lining 16MnR 78.5 210 0.300 310 310 4.2.
Advances Science and Technology of Water Resources, 2001, 21(3): 18-20.
Journal of Civil Engineering, 2004, 37(4): 70-75.

The design documents delivered by the civil air defense project include design specifications, design drawings, calculations, major equipment and materials, and the construction drawing budget, etc.
The model can generate automatically the plan views, sectional views, 3D views, and even bulk samples, as well as equipment and material statistics, area calculations, construction drawing budget, etc.
In contrast, the realization of BIM technology needs a series of software to solve problems, and the model made by BIM is only the “raw material” compared to what the client wants, and you still need to use other software to process the "raw material" into finished products.
[2] Li Heng, Guo Hongling, and others: Study on the Application Mode of BIM in Construction Projects in Engineering Management Journal (2010)
[6] Wang Guangbin, Zhang Lei, and others: Building Information Model and Its Application in China, and Government Policy Studies in China Science and Technology Forum (2012)

These wee effective to improve the industrial stoves internal heat transfer efficiency, increased the heating speed and shorten the material heating temperature and reaction time. 4.
The results were showed in table 1, Table 2and Table 3, Table 1 for the pulverized coal composition and calorific value, Table 2, Table 3 respectively, the chemical composition of the dry raw material and clinker.
So, we needed to increase the amount of pulverized coal and raw materials to ensure the system stable operation.
Acknowledgements This work was supported by a grant form the National Natural Science Foundation of China (No.51274159).
Journal of Chinese Society of Power Engineering . 2010, 30(3):184-191

Suyantab and Sri Juari Santosac,* Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Sekip Utara, Yogyakarta 55281, Indonesia aellarizkif.m@gmail.com, bsuyanta_mipa@ugm.ac.id, c*sjuari@ugm.ac.id Keywords: Gold nanoparticles, Sodium citrate, L-cysteine, Hypochlorite, Detection Abstract.
Experimental Section Materials The materials used in this study were gold solution made from 1.0 gram of 99.9% pure gold dissolved in aqua regia.
Lin, C.C., Huang, Selective Detection of Iodide and Cyanide Anions Using Gold Nanoparticle-based Fluorescent Probes, ACS Applied materials and interfaces, 4 (2012) 2652-2658
Zolotof, Using Gold Nanoparticles in Spectrophotometry, Journal Anal.

Compared with costly quick repair material as well as road renovation and expansion engineering, materials selected by precast assembling slabs are traditionally ordinary Portland cement and steel bars, being able to significantly reduce maintenance costs.
In the use of fast-setting repair material for maintenance construction, even a little difference in curing conditions may have a major impact on the development of strength, especially on the formation of early strength, if serious, even causing repair failure.
Through the lap joint of the dowel bar buried in prefabrication of slabs and the reserved dowel bar slot, then fill dowel bar slot with fast patching material, not only being able to realize load transmission ability at joints, but also being able to ensure the smoothness of assembled pavement.
Western China Communications Science & Technology, (03)2006:11-16
China Journal of Highway and Transport, (1)2000: 56-60

The SPM family are the nano-technologists and materials scientists "dream machines" and can probe using tunnelling current mode (STM), mechanical contact mode and tapping mode (AFM).
Further developments of scanning probe techniques now includes electrochemical probes (SCEM) scanning electro chemical microscopy, where tips are "coated" with chemical species which have an electro-chemical affinity to the target material on the specimen surface as the tip approaches the target a current is developed indicating the presence position and shape of the target material [18].
Hutchins: Tribology: Friction and Wear of Engineering Materials (Butterworth-Heinemann, 1992)
Yacoot: Internation Journal of Nanoscience, Vol. 1 (2002)
Jiang: Advanced Techniques for Assessment of Surface Topography (Kogan Page Science, London 2003)