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Permeable concrete is a mixture of particular gradation of aggregate, cement, reinforced materials, additives and water in specific proportions.
During the immersion the pH value of soaking solution would rise due to alkalinity of the concrete materials.
Fire safety Journal,2002(37):772-784
Chongqing institute of technology learned journal,2008:22-24.
(In Chinese) [9] ZhangYingZi FanYingFang, LiuJiangLin, CaoXiaoXiang, The tests of C40 concrete compressive performance Under the environment of simulated acid rain[J]. building materials journal, 2010(13)： 410-434.

The heat is generated at the contact surface of the two materials through contact friction and the two materials become soft and deformed.
Nickel, Analysis of the Friction Welding Process in Relation to the Welding of Copper and Steel Bar, Journal of Materials Processing Technology, 82, (1998), 127-136
Wright, Rotary Friction Welding of a Fe3Al based ODS alloy, Materials Science and Engineering, A329-331, (2002), 756-762
Nogi, Tensile Properties and Fracture Locations of Friction-stir-welded Joints of 2017-T351 Aluminum Alloy, Journal of Materials Processing Technology, 142, (2003), 692-696
Kim, Fatigue Properties of Inertia dissimilar Friction-welded Stainless Steels, Journal of Materials Processing Technology, 155-156, (2004), 1402-1407.

The course materials of CAI enriched teaching materials including sports basic knowledge, multi media video teaching, sports health knowledge, and sports game information.
The sports staffs mainly use VB and VF programming language to develop CAI course materials.
China Sports Science, 1985,21(4): 29~30
China Sports Science, 1999,35(10):30~32
Shandong Sports Science, 2001,23(3):54~55

References [1] A.K.Geim and K.S.Novoselov: Nature Materials Vol. 6(2007), p. l83-191
Zhang et al: Advanced Functional Materials Vol. 19(2009), p. 2297-2302
Zhou et al: Chemistry of Materials Vol. 22(2010), p. 4096-4102
Yao et al: Journal of Materials Chemistry Vol. 20(2010), p. 9032-9036
[12] R.J.Samuels: Journal of Polymer Science: Polymer Physics Edition Vol. 19(1981), p. 1080-1105.

High-speed cutting technology is widely used in machining titanium alloy and other high hard materials, due to its high efficiency, high precision, high surface quality, etc.
Ramaraja , “Effect of machining parameters and heat treatment on the residual stress distribution in titanium alloy IMI-834,” Journal of Materials Processing Technology, vol. 139, pp. 628-634, 2003 [4] A.
Aspinwall, “Surface integrity of a high speed milled gamma titanium aluminide,” Journal of Materials Prossing Technology, vol. 118, pp. 143-150, 2001 [5] S.
Journal of Applied Sciences, Vol. 9,pp. 121-127, 2009 [9] C.
“The effect of machining on surface integrity of titanium alloy Ti-6% AI-4%”.Journal of Material Processing Technology, Vol. 166, pp. 188-192, 2005

References [1] RR Boyer: Materials Science and Engineering A 213 (1996), p.103−114
(inChinese) [3] XJ Yuan, GM Shen, B Qin: Materials Characterization 59-7 (2008), p. 930−936
[4] B Qin, GM Shen, JW Huang, B Zhou: Materials Characterization 56-1 (2006), p. 32−38
Prasad Rao: Journal of Materials Processing Technology 209 (2009), p. 5862–5870
[7] RF Qiu, C Iwamoto, S Satonaka: Journal of Materials Processing Technology 209-8 (2009), p. 4186-4193

Modified reinforced polymer materials are currently the most respected water-lubricated bearing materials.
Friction coefficient of four materials in microbial seawater Fig. 6.
Friction coefficient of four materials in sediment-containing seawater Wear depth.
Wear depth of pin specimens of four materials in microbial seawater Fig. 8.
Compared to Thordon materials and Feroform materials, modified UHMWP have a lower coefficient of friction and a lower depth of wear.

Introduction Rolling of high strength materials sandwiched between layers of softer material, known as sandwich rolling, evolved as an alternative technique devoid of roll distortion [1,2].
The material was cut into slabs of small sizes and hot rolled.
Weinstein "The Deformation of sandwich Materials" Int.
Alamu "Simulation of Temperature Gradient in Hot Flat Rolling at Low StrainRates", Journal of Science and Technology Research 1(1): 55-62. (2002) [10] O.
Durowoju "Evaluation of Zener - Hollomon Parameter Variation with Pass Reduction in Hot Steel Rolling", International Journal of Environmental Issues 1(1): 145-159, (2003) [11] O.

Key Engineering Materials. 2011, 487:376-380
Key Engineering Materials,2011
Advanced Materials Research, 2010, 35:309-313
Journal of Materials Processing Technology,2005,168(3):448~463
Machining characteristics and surface integrity of yttria stabilized tetragonal zirconia in high speed deep grinding[J].Materials Science and Engineering,2003, A345:155~163.

Turbidity currents are the main sedimentation mechanism in dam reservoir and can unload or even resuspend bed materials [2].
The head height increases with slope, because the body velocity increases and materials move more rapidly into the head [6].
The key role of bed materials in self-reinforcing mechanism of the head was discussed in [2].
It means that the gravity current erosion of bed materials is more than its deposition onto the bed.
The suspended materials increase the density and thus the speed of the current.