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Materials and Methods We chose minjiang river (Wenchuan water source), jiangyou station and beichuan station to investigate the water quality, and select ammonia nitrogen, total hardness, fluoride,total iron, these four indicators to analyze the change trend of the water quality before and after the earthquake.
Research of Environmental Sciences,2008,21(5):110-116.
Influence of Wenchuan Earthquake on Water Resources and Water Environment in the Upper Reaches of the Minjiang River [J].Journal of Sichuan Normal University (Nature Science), 2009:01:0134
[8] ZHAO Qin,LUO Mao-sheng,CAO Shu-you,et al.Research on the recovering measures and economic loss evaluation of soil erosion and water loss in Wenchuan-Earthquake-hit are-as of Sichuan Province[J].Journal of Sichuan university(Engineering Science Edition), 2009, 41(3): 289—293.
Chinese Journal of Disinfection 2008:25(6).

Materials and Methods The experiment materials.
Journal of Natural Medicines, Vol. 62 (2008) No. 1, p. 75-78
Journal of Natural Medicines, Vol. 42 (2012) No. 12, p. 95-98
Analytical Sciences, Vol. 17 (2001) No. 3, p. 391-398
Journal of Tongren Vocational and Technical College(Natural Science Edition).

Introduction Research and the creation of new materials is an important area for the improvement of technologies and products.
Ultimately, materials with exceptional properties applicable to practice are sought.
As such materials, which can have exceptional properties in combination with their weight, can be considered cellular materials.
Aerospace 2022, 9, 222. https://doi.org/10.3390/aerospace9040222 [6] Kadkhodapour, J. et al., Failure mechanisms of additively manufactured porous biomaterials: Effects of porosity and type of unit cell, Journal of the Mechanical Behavior of Biomedical Materials, 50, 2015, 180-191, https://doi.org/10.1016/j.jmbbm.2015.06.012
AIMS Materials Science, 2022, 9(3): 455-480. doi: 10.3934/matersci.2022027

Materials and Methods Materials.
Frontiers in Materials, 6, p.106
Materials Letters, 66(1), pp.10-12
Materials, 12(3), p.442
Materials, 15(1), p.202

Note that fatigue failure of this superalloy continues to occur after exceeding 107 cycles what is value considered as a fatigue limit for most of steels and hard materials.
Pineau, Metallurgical and Materials Transactions 7 (1977) A 8, 1095-1105
Korsunsky, International Journal of Fatigue 31 (2009) 11/12 1966-1977
Cizeron, Journal of Materials Research, 12 9 (1997) 2298–2316
Yanagisawa, Journal of Zhejiang University-SCIENCE A Applied Physics & Engineering 10 11 (2010) 727-737.

Then the RFPA2D program is used to analyze the influences of different homogeneity on the propagation and evolution of cracks in the rock-like brittle materials under external load.
Compared with corresponding experimental results, the conclusion that the homogeneity has a great effect on the failure process of materials is drawn.
Acknowledgements This work was financially supported by the National Natural Science Foundation of China (Grant no. 51004007) , the Natural Science Foundation of Jiangxi province (Grant no. 20114BAB216026) and the Scientific Research Development Foundation of Hefei University of Technology (Grant no. 2011HGBZ1551), which are gratefully acknowledged.
Chinese Journal of Rock Mechanics and Engineering，2011, 30 (4) :803-811 (In Chinese) [4] Wang Xudong, FU Xiaomi.
Chinese Journal of Rock Mechanics and Engineering, 2000, 19 (4):466-469 (In Chinese)

Introduction Scraper conveyor is one of the important equipments to convey bulk material, especially plays a big part in the full mechanized mining Face of the coal mine.
The basic dynamic model of scraper conveyor Neglects the influence of material dynamics characteristics, vibration quality of material on scraper conveyor convert coefficient ，， in the ordinary circumstances, .Considered the influence of middle groove elasticity for scraper conveyor and the assembly gap, its dynamics model like Fig.1 shows.
Dynamics model when considered material dynamics characteristic Fig4 Dynamic model for material action between load-carrying scraper chain and bulk material We can communicate stickiness, elasticity, Plasticity to describes bulk material dynamic Fig.3 Viscous, elastic and plastic model for bulk materials characteristic, like Fig. 3.According to the measure result, we can get ,,,,and so on ,,,, changeand,then study dependent relations that stickiness,elasticity,Plasticity parameter to stimulating.
Journal of coal science & engineering (China). 2005(1): 83~85
Dynamic excitation of ransported materials on belt conveyors.World of Mining.2004(2): 105～114 [3] V.veeraswamy,A.R.P.Reddy.Selection and installation of belt conveyors at no.21 incline:Yellandu a case study.Journal of mines.January/February,2004:3～5 [4] Fu Jun-qing,Wang Cong,Li Yu-jin.Optimal Driving of Large Belt Conveyor with Multi-roller Variable-Frequency Drive.J.China Univ.of Mining&Tech.

Materials Processing Technology, 63 (1997), 254-259
E.M .Rubio Analytical methods application to the study of tube drawing processes with fixed conical inner plug: Slab and Upper bound Methods, Journal of Achievements in Materials and Manufacturing Engineering, 14(12), (2006), 119 – 130
Alexandrova, Analytical treatment of tube drawing with a mandrel, Journal of Mechanical Engineering Science, 215(6), (2001), 581 – 589
Wang, J.Liu and G.D.Wang,(2009), An analytical solution for tube sinking by strain rate vector inner product integration, Journal of Materials Processing Technology, 209(1), (2009) 408 – 415
M.I., Panhwar, R., Crampton and M.S.J., Hashmi, Analysis of the tube sinking process based on non Newtonian characteristics of the fluid medium, Journal of Materials Processing Technology. 21(2) (1990) 156 – 175

Kelly-Vargas et al. [17] also found that material with 1 mm of particle size showed higher retention capability (up to12%) than the material with 2 mm of particle size.
This research indicated also that, even though partial replacement of OPC with RHA in the binder system reduced the UCS of solidified samples, it was still high enough to exceed the mortar limit of 20 N/mm2, which was more than sufficient to be reused as construction materials.
Ibrahiem, Removal of Zn(ii), Cd(ii) and Mn(ii) from aqueous solutions by adsorption on maize stalks, The Malaysian Journal of Analytical Sciences. 15 (2011) 8-21
Nda-Umar, Agricultural waste materials as potential adsorbent for removal of heavy metals from aqueous solutions, International Journal of Chemistry Research, 2 (2012) 48-54
Shaaban, Stabilization/solidification of lead-contaminated soil using cement and rice husk ash, Journal of Hazardous Materials.137 (2006), 758–1764

Erosion behavior of the substrate materials is ductile and resistance is better than the coating material.
Proc., of Sino-Swedish Structural Materials Symposium, (2007) 11-14
Journal of Materials Processing Technology, 159 (3) (2005) 347-355
Material Science Forum, 251-54 (1997).809-816
The role of particle properties in the erosion of brittle materials, Wear, 193 (1996) 105-113