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Material and Method The main improvement of arc-shaped baffle fishway is the alteration that the flat baffles are replaced by arc-baffles (Fig. 2).
Acknowledgements The authors are grateful to the funding for this study from the National Natural Science Foundation of China (NSFC 50979071 and NSFC 11172213), Kwang-Hua Fund for College of Civil Engineering, Tongji University and Innovation Program of Shanghai Municipal Education Commission (11ZZ28).
Journal of hydraulic engineering ASCE, Vol 133 (2007), p.160-172 [2] Mario Theriault, Great Maritme Inventions 1833-1950, Goose Lane, 2001, p. 45 [3] J.
Advanced Materials Research, 511, 2012: 154-158.

Silicon carbide (SiC) has been verified as a promising semiconductor that can be used in harsh environment like high temperatures and radiation environment owing to its superior material properties.
Responsivity depends on several inherent factors including material refractive index, absorption coefficient, device structure, doping and temperature of operation, other external factors such as bias voltage and the power of incident light also influence the responsivity [6].
As the light is incident horizontally, the photogeneration rate will be a function of the horizontal distance as figure 2 shown, consider the optical decay length is considerably less than the collector region thickness and the total photogeneration rate across the two depletion region is (1) (2) Where P is the power of the incident light, k is Planck’s constant, v is the frequency of the incident light, a is the effective absorption coefficient of the material, R is refractive index.
Acknowledgments This work was financially supported by the National Natural Science Foundation of China (Grant No. 60876050), Special Scientific Research Project of Shaanxi Provincial Departments of Education (08JK367, 09JK630) and the research fund for excellent Doctor degree thesis of Xi’an University of Technology Reference: [1] J.R.
Strollo and E.Napoli: Microelectronics Journal Vol.32 (2001), p. 491.

Preparation and characterization of CA-PEI double modification water-based magnetic fluid Xisheng He1,a,Huiqing Peng1,b,Jin Li2,a,Jun Dong3,a 1School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, PR China 2School of Physics and Optoelecteonic Engineering, Dalian University of Technology, Dalian 116024, PR China 3Jun Dong Institute of optoelectronic material and technology,south china normal university, Guangdong 510631, PR China ahexisheng@126.com,bpenghuiqing@163.com Keywords: nanoparticles;surface modification;magnetic fluid Abstract: Fe3O4 magnetic nanoscale water-based magnetic fluid was fabricated by co-precipitation with citric acid(CA) and polyethylene amine(PEI) as dispersant.
The FTIR spectrum of Fe3O4 MNPs The morphology and microstructure of prepared materials were characterized by SEM and TEM.The TEM image shown in Fig3 indicates that the typical size of the magnetic cores of modified particles is in the range 8-9nm.An SEM image of the prepared modified particles is also shown in Fig3,where circular structure based on a lot of MNPs with typical size of 45-50nm can be observed.Based on the TEM and SEM images in Fig3,it can be clearly seen that these Fe3O4 MNPs with narrow size distribution are well dispersion controlled.
European Journal of Pharmaceutics and Biopharmaceutics 57 (2004): 427–430
Applied Surface Science, 2004, 221: 430 - 436.

Depending on certain parameters (load, materials in contact, speed, lubricant) in point contact with rolling other lubrication regimes appear: IVR – isoviscous-rigid or hydrodynamic regime (HD); PVR - piezoviscous-rigid regime and IVE - isoviscous-elastic regime [5].
Dowson, Isothermal EHD Lubrication of Point Contacts Part III – Fully Flooded Contacts, Trans. of ASME, Journal of Lubrication Technology. 99 (1977) 15-23
Series A, Mathematical and Physical Sciences, 1985, pp. 245-269

In this paper, the mechanical properties at 0°, 45° and 90° to the rolling direction of X80 pipeline steel is comparatively analyzed in grain size and grain boundary misorientation by SEM and EBSD. 2 Materials and methods Experimental materials were taken from hot-rolled X80 pipeline steel, and its chemical composition is shown in Table 1.
According to Hall-petch law shows that[5],while the effective grain size of the material is smaller, the material strength is high.
Hot Rolling Technology to Reduce Tensile Strength Anisotropy of Pipeline Steel [J], Journal of Iron and Steel Research, 2010, 22(12): 53-57
Metal science and Heat treatment Principle [M], Harbin Institute of Technology press, 2004: 156
Analysis of Different Acicular Ferrite Microstructures in Low-carbon Steels by Electron Back-scattered Diffraction.Metallurgical and Materials transactions A, 2003, 34: 10-43.

Shielding Materials.
Yet, little information has been reported for these shielding materials.
However, more data for developing the relationship between heterogeneous concrete materials and mechanical behavior characteristics is required.
Experimental Program Materials and Mixtures.
Monteiro, Concrete - structure, properties and materials; New Jersey: Prentice Hall (1993), ch. 3

Figure 1 illustrates that compared with currently utilized metal materials, high specific strength of CMC composites, especially at high temperature, makes them attractive as structure materials [1].
CMC composites research progress in China Owing to the embargo of high performance carbon fiber raw materials and ceramic products by western countries, the fabrication of ceramic materials in China is relatively backward.
Materials Review,Vol21,2007.
Situation and Development of Advanced Materials Technology in Japan.
Ceramic matrix composites , key materials for future space plane technologies [R] .

Most have low solubility in water, and generally they are very lipophilic, and they are formed because of incomplete combustion of different organic materials[1].
Li, "Pepulation exposure to PAHs and Health Risk Assessment in Beijing Area," Journal of Agto-Environment Science, vol. 28, pp. 1758-1765, 2009
Zhang, "Human Exposure Factors of Chinese People in Environmental Health Risk Assessment," Research of Environmental Sciences, vol. 22, pp. 1164-1170, 2009
Muller, "Polycyclic aromatic hydrocarbons in foods: human exposure through the diet in Catalonia, Spain," Journal of Food Protection&, vol. 66, pp. 2325-2331, 2003
Beijing: China Environmental Science Press, 2000.

Materials and Methods Selection of the Sampling Area This paper takes ChongMing Island as the study area, and analyzes the urban ecosystem environmental carrying capacity from a macro perspective.
Journal of Southwest China Normal University (Humanities and Social Sciences Edition), 2006, 32(5):134-140
Environmental Science and Management, 2011, 36(4):164-169
Research of Environmental Sciences, 2008, 21(2):99-104
Beijing: China Environmental Science Press, 2000.

Experiment Main materials.
So Ni has great influence on materials’ permeability.
So Ni has great influence on materials’ permeability.
Materials Review,2001 (15):14-19
Journal of Inorganic Materials, 2005 20(3)