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The Closed-loop Identification of Dynamic Parameters Based on Rigid Model for the Feeding System of Commercial Numerical Control Machine CHEN Guangsheng1,a, LI Haolin1,b 1School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai , China a cgs-168@163.com, b haolinli@163.com Keywords: The Closed-loop Identification; Computer Numerical Control Machine; Feeding System; Parameters Identification Abstract: The precision of high-speed CNC (Computer Numerical Control) machine are greatly influenced by the dynamic characteristics of servo system.
Acknowledgements This project was supported by the National Key Technology Program of China under Grants 2009ZX04014-023 and the National Natural Science Foundation of China (Grant No 51005158 ).
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Part II: modeling and identification of feed driver, International Journal of Machine Tools & Manufacture, Vol41.1487-1509(2001).

Fire water mixed with the leaked material to form the fire sewage when fire forces use fire jet to put out and control the fire .And because the chemical industry fire often burn fiercely and fire temperature is very high, which lead to  the fire personnel and equipment can not close.
In the event of a fire or explosion accident, surplus material should be transfered to a safe place.
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Because the materials of the piston distribute unevenly, irregular distortion will arise when it’s heated [1, 2].
Acknowledgements This work was financially supported by the “Important & Specialized Science and Technology Project of Ministry of Industry and Information Technology of the People’s Republic of China” (2011ZX04002-132).
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The electrical resistively of the materials were also investigated.
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The bottom plate is divided into the edge plate and center plate, which thicknesses are respectively 21m and 12.5m, and materials are respectively Q235-A and Q235-B.
In addition diameter of the manhole on the tank wall is 0.6m. the height, thickness and material of each layer of tank wall are shown in Table 1.
Size and material parameters of tank Lap Material Height(m) Thickness(mm) 1 SPV490Q 2.42 33 2 SPV490Q 2.42 27 3 SPV490Q 2.42 21.5 4 SPV490Q 2.42 18.5 5 SPV490Q 2.42 15 6 SPV490Q 2.42 12 7 Q345R 2.42 12 8 Q235-B 2.38 12 9 Q235-A 2.38 12 Table 2.
Journal of Zhejiang University (Engineering Science), 2006.40(6): 977-981
Static Inclined Test and Theory Analysis of Oil Storage Tank Model.Journal of Tianjin Unibersity,37(10) : 891-895.

Jia[6] found that after acting on alveolar macrophage at 6h with a same dose,the toxicity of the Carbon Materials from large to sligt is as follows: SWCNTs > MWCNTs > C60.
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And chromium is a kind of important industrial raw material, it will be better if we use the recycled chromium in the cross of production.
Experiment Experimental materials di-(2-ethylhexyl) phosphoric acid(P204), sorbitan oleate(Span80), chromic nitrate(Cr(NO3)3, ≥99%), sulfuric acid (H2SO4, 95~98%), sodium hydroxide(NaOH, ≥99%), commercial kerosene(density, 0.8 kg.L−1).
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The ellipse area in the figure exceed the ultimate strength of materials, it will be broken.
Experimental studies water jet impact on rock and rocklike materials[R].
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It is found that aromatic amino acids and SMP materials are important precursor of DBPs in the research on DBPs of drinking water [6,7].
Though there are no FⅠ~FⅥ materials in HIB, the THMFP is much lower.
According to the 3DEEM, the contents of FⅠ~FⅥ materials are different to each fraction, so make the different contribution to THMFP. 2)In comparison with the four different bio-treatment processes, C plant adopts the Orbal Oxidation ditch process, which leads to the highest THMFP ,and secondly is the Convert A2/O process, which impacts resistance load ability.
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Environmental Science, 2009,30(8):2282-2287 [6] Trehy M L, Yost R A, Miles C J.