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School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, China nieyi@hpu.edu.cn cjshang@ustb.mater.edu.cn Key words: Ultra-Low Carbon Bainite; M/A; cooling rate; tempering; TMCP; structure Abstract:The amount, size and structure of M/A in ultra low carbon bainitic steels，which are mainly affect by the transformation process, the cooling rate and the tempering treatments, have been investigated.
De, Cooman, Structure-properties relationship in TRIP steels containing carbide-free bainite, Current Opinion in Solid State and Materials Science, 8 (2004), p.285
Journal of Iron and Steel Research, 2005, 17(1): 42-48
Effect of tempering temperature on the mechanical properties and microstructure of an copper-bearing low carbon bainitic steel, Journal of University of Science and Technology Beijing, 15(2008), No.1, p.38
Mei, Effect of controlled-rolling parameters on the ageing response of HSLA-80 steel, Journal of Materials Processing Technology, 197(2008),No.1-3, p.374

Based on theory of fractal dimension:AC-13 dense gradation asphalt mixed material should have been the most dense in theory, but the set material and asphalt can not reach that dense state as mixed material internal exists micro-gap, micro-crack.
It shows fine material and asphalt mixed material will fill the gap more effective as D value increases.
This further proves fractal theory can apply for asphalt mixed material successful and the theory is expected to become a guide material design of quantitative indicators.
[Thesis for master degree of Changsha University Of Science &Technology].Changsha:Changsha.University.Of.Science&Technology,2008.06 [2] Ministry Of Communications Of The People’s Republic Of China.
Beijing:People’s communications Publishing House,2004 [5] YanQiang,HuanPeng Fractal Characteristic Of Asphalt Mixture Void Journal Of Tongji University 2004.01 [6] LiGuoqiang,DengXuejun On Fractal Gradation Of Aggregates Journal Of Chongqing Jiaotong Institute 1995.06 [7] YangRuihua,LongBin Fractal Characteristic Of Grading Of Asphalt Mixture WESTERN China Communications Science&Technology 2010.6 [8] HuGuihua,ChenXiaowei,LiuHongfu,HuangYunyong Based On Skeleton Type Surface Layer Of Asphalt Mixture Gradation Range Of Continuous Journal Of Foreign Highway 2010.06 [9] HuangYunyong,LiuHongfu, HuGuihua AC-13Asphalt Mixture Gradation Optimization Dseign Research Journal Of Foreign Highway 2008.06 [10] YangRuihua,XuZhihong,ZhangChao,LiMing Fractal Gradation Theory Of Asphalt Mixture Journal Of Tongji University 2008.12

Air filtration materials play an important role in environmental protection.
Ordinary air filtration materials can’t remove tiny particles thoroughly and it is easy to breed harmful organisms.
Experimental Materials.
Science and Technology of Advanced Materials. 2005(6): 307-311
Journal of Electrostatics. 2002, 54: 333-341

In particular, the influence of the materials strain hardening, flange slenderness, web stiffness, shape factor and moment gradient the on the plastic behaviour of such beams has been investigated.
The relationships are based on the numerical results obtained by means of FE code ABAQUS through an extensive parametric analysis for different materials and different geometrical properties [22]-[23].
“User’s Manual: Volume III: Materials”, 2010
Engrg., Norwegian University of Science and Technology, Trondheim, Norway
Journal of Structural Engineering ASCE 1999;125(8): 921–9

The particleboard of larix gmelinii and UF resin were used as main raw materials.
However, the sources of VOC emissions are complicated, such as raw materials and manufacturing techniques.
Materials and methods Materials.
Forest products journal.
Forest Products Journal.

Nanosized particles possess characteristic physical and chemical properties different from those of bulk materials due to the confinement of electrons, excitons, and photons into small volumes.
In the following measurements, 50nm and 5000nm Cu powders wrapped by the same insulating materials are measured at the same time.
Acknowledgements Support for this work by National Science Council of the Republic of China under grant No.
Zhang: International Journal of Heat and Mass Transfer Vol. 49 (2006), p. 1489 [3] C.
Xiao: International Journal of Heat and Mass Transfer Vol.48 (2005), p. 3932 [4] S.

Journal of cattle magazine, 2003, 11:36 to 39
Beijing: science press, 2004
Crop Science, 1990, 30:990～993 [16] Xueliang Shen, Liming Xia.
Science，2004，304(5667):66-74
Biotechnology Journal，2007，2(2):207-183

Materials and Methods Materials.
Other materials used in the test were of analytical grade.
Fenner, et al, Science, 313 (2006) 1072
Bauer et al, Journal of Environment Management, 79 (2006) 215 [7] S.
Krause, et al, Journal of Hazardous Materials, 149 (2007) 631

Denry: Dental Materials, Vol.24 (2008) No.3, p.289
Kelly: Dental Materials, Vol.24 (2008) No.3, p.299
Jevnikar, et al: Journal of Biomedical Materials Research, Vol.53 (2000) No.4, p.304 [9] P.R.
Kunii: Dental Materials Journal, Vol.28 (2009) No.1, p.44
Jun and et al: Dental Materials Journal, Vol.28 (2009) No.1, p.44

Methods Equipment and Materials Laboratory glassware, digital balance (AND GR- 200), a pH meter (Lamotte), UV-Vis Spectrophotometer (Perkin Elmer Lamda 25), emulsification stirrer (0-3000 rpm).
All materials used p.a quality (Merck ), namely: mercury (II) chloride, benzoyl-acetone, span 20, span 80, kerosene, hydrochloric acid, dithizone, carbon tetrachloride, nitric acid.
Journal of Membrane Science, 229(1-2), pp.235-239
Journal of Environmental Protection, 3(01), p.129-134
Journal of hazardous materials, 151(2-3), pp.610-615