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This leads to the low production efficiency, high process cost, and sometimes the processing technology is hard to achieve for difficult-to-machine materials[1,2,3].
Science Press,1987
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As mentioned before, one of the most important advantages of the technique of strengthening with prestressed CFRP is a more effective utilization of the material strength of CFRP.
Moreover, the utility efficiency of material strength of CFRP was significantly improved by the strengthening technique of prestressing CFRP.
Composites Science and Technology, 58, pp. 1259-1257
Journal of Composites for Construction,2011,15(2):168-180 [10] Zhang TanXian, Lv Xilin, Xiao Dan, et al.
Engineering Journal of Wuhan University, 2005, 38(4):55-58

The final result is the improvement of the mechanical performances of the welded joints even in some materials with poor fusion weldability.
Table1: Composition of materials (weight %) Ti Al V Fe C N H O 89,2 6,1 4 0,3 0,1 0,05 0,01 0,2 The sheets were welded together at rotating speed of 300 and 500 rpm.
[4] Chan Hee Park, Young Gun Ko, Jin-Woo Park, Chong Soo Lee, “Enhanced superplasticity utilizing dynamic globularization of Ti-6Al-4V alloy”, Materials Science and Engineering A 496 (2008) 150-158 [5] S.
Dippenaar, “The evolution of microstructure of Ti-6Al-4V alloy during concurrent hot deformation and phase transformation”, Materials Science and Engineering A 549 (2012) 163-167 [8] Yu Zhang, Yutaka S.
Park, Santoshi Hirano, “Microstructural characteristics and mechanical properties of Ti-6Al-4V friction stir welds”, Materials Science and Engineering A 485 (2008) 448-455

The blank material is DC06, thickness is 0.8 mm.
The die casting material is HT300.
This work was supported by the Tianjin Colleges and Universities Science Development Foundation Tianjin, China, and Tianjin Colleges and Universities Double Five Science Research Plan Foundation Tianjin, China, under Grant 20060803, and SWPY20080003 respectively.
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The model and prototype span decide reduced scale; According to the principle of geometric similarity ,reduce scale of the beam’s section size ; Model’s reinforcement ratio, stirrup ratio are consistent with the prototype ; Model’s reinforced level, concrete intensity is consistent with the prototype; Model’sratio of concrete is in accordance with the ratio of engineering materials.
Acknowledgment We are aided financially by the Beijing municipal engineering special funding structure and new materials engineering research center and the key project of Beijing natural science foundation ,the urban underground traffic space security disaster prevention technology research (8121001) References [1] Deng Jingjing,Liu Dongdong: Fire Resistance Experimental Research on Simply-Supported Recycled Concrete Beam ( Beijing Institute of Civil Engineering and Architecture) (2010)
[3] Liu Dongdong,Jia Chen: Reinforced concrete beam after high temperature mechanical property test of the learning experience (Journal of Southeast University) (2010)
[4] Zhang Tian :Test Study on the Performance of the Splicing Steel Bars with Non-contanct Forms ((Journal of Southeast University) (2008)
[6] Zhang Gang : Too much concrete bridge and the evaluation method of durability damage assessment model(Highway traffic science and technology,2010) .

The past investigations [1,2] have showed that it was very suitable to serve as materials for pulp and paper making.
Experimental Materials.
Acknowledgements The authors here extend their thankfulness to the National Natural Science Foundation of China (Grant No. 30700633), the Science-Technology Foundation for Middle-aged and Young Scientist of Shandong Province, China (Grant No. 2007BS08011), Research Foundation for Retured Scholars of Jinan, Shandong (Grant No.20090407) and the State Key Laboratory of Pulp & Paper Engineering, South China University of Technology , China (Grant No, 200610) for their financial supports to this project.
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Research of Aluminum Reduction Cell Thermal Balanced Intelligent Control System Xiangyang Xia1,a, Jie Li1,b 1 School of Metallurgical Science and Engineering, Central South University, Changsha, Hunan, 410083, China axia_xy@126.com, bsummer719@sohu.com Keywords: aluminum reduction, control system, liquidus temperature, superheat, energy saving.
The technology established the concentration of alumina through adaptive control systems by modeling the estimated model, used less volume - way too much to turn the system under the material (aluminum tank) which have a "motivation" and other parameters with recursive least squares estimation method to estimate the alumina concentration can reflect the status of model parameters.
Material balance control of alumina concentration can be resolved, the energy balance control is not well controlled, energy balance is to control temperature in aluminum electrolyte at the appropriate temperature range [7].
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Acknowledgements This work was financially supported by Knowledge Innovation Program of the Chinese Academy of Science (Grant No.
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The test materials were melted by a 25 kg vacuum medium frequency induction furnace.
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Introduction Truss arch bridge ,the arch structure which is inherited double curved arch bridge, is suitable for our geographical environment.Because of its cheaper project cost, convenient construction and saving materials, this kind of structure has been speedily constructed in several cities .Compared with other masonry arch-bridge, trussed arch bridge has some special characters .
The carbon fiber sheets and the supporting resin bonding material used for reinforcement should meet the requirements of the appropriate physical and mechanical properties.
Acknowledgements This paper is sponsored by the Natural Science Foundation of Hubei Province of China (Grant No. 2009CDB095) and the Fundamental Research Funds for the Central Universites (Grant No.2010-IV-062).
Journal of Bridge Engineering. 2000 [2] Sun Xiaoyan, Mo Xijing.
Journal of Chongqing Jiaotong University(Natural Science), vol 27, 2008(11):898-901.