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Among potential renewable materials, starch is an abundant and inexpensive natural polymers with good biodegradability, but starch has poor mechanical performances and cannot make useful materials.
Therefore, the modification of starch has been studied extensively for degradable materials.
Although starch graft copolymers by aliphatic polyester are a kind of complete biodegradable polymer materials, the coverage on them was limited[8-10].
Experimental Procedure Materials.
[14] Deming Xie, Yunfeng Shi and Chunlan Xie: Journal of Materials Science and Engineering Vol. 24 (2006), p.836 (In Chinese)

The present paper summarises the findings collected over several years of study of materials structure and surface properties.
The larger the resulting track (deeper, wider), the poorer is the material’s resistance to friction loads.
Journal of Materials Engineering and Performance, 2002, Vol. 11 (3), pp. 294-300
Material Characterization, 1996, Vol. 37, pp. 81-88
Laser surface modified ductile iron by pulsed Nd:YAG laser beam with two-dimensional array distribution, Applied Surface Science, 2005, Vol. 245, pp. 316-321.

The research on thin-walled ring rolling stiffness condition is significant to machine design, ring cross section design and ring material selection.
Acknowledgements The authors thank the Wuhan Science and Technology Bureau Special Project (No. 201051099415-02 for the support on this research.
Journal of Computational and Nonlinear Dynamics,Vol. 1 (2007), p.86 [4] H.L.Song.
Li.Applied Mechanics and Materials, Vol.44-47(2011), p 436 [8] L.
Journal of Materials Processing Technology, Vol. 69 (1997) p. 273

The materials for preparing bimetal strips with cold roll bonding should have a good plasticity.
To meet the critical reduction, the materials for cold roll bonding therefore should have a good plasticity.
References [1] Yang Liu, Wenjing Shang, Hongfang Liu, Zhigang Huang, Applied Mechanics and Materials, 2012, 184-185(1): 959-962
[2] Gyeong Tae Kang, Jae Sook Song, Sun Ig Hong, Advanced Materials Research, 2014, 951(1): 83-86
[7] Wei Cai, Zao Qi Hu, Hong Fang Liu, Advanced Materials Research, 2011, 194-196: 1347-1351.

However, USW is usually employed to weld polymers which limited in homogeneous materials conventionally.
The welds between dissimilar materials are demanded increasingly.
For USW, the high ultrasonic energy can break the confinement among the molecule chains after the materials are melting.
For our method, diffusion time is not the coefficient only determined by the materials.
Sci., (2010) in press [19] Guohong Zhang, Jianhui Qiu, Zuowan Zhou, Xie Fu, Yongbo Wu: submitted to Journal of Materials Processing Technology (2010) [20]Guohong Zhang, Jianhui Qiu, Liang Shao, Mingzhu Liu, Min Zhang and Yongbo Wu: submitted to Journal of Materials Processing Technology (2010)

In the model, soil material is elastoplastic, and its constitutive model is Mohr Coulomb, the element type of soil is a three-dimensional solid, the element type of tunnel lining structure is space shell element, and tunnel settlement joint is three-dimensional linear spring.
In the calculation model, soil material is elastoplastic, the soil constitutive model selected Mohr Coulomb, the element type of soil is choose a three-dimensional solid element, the element type of lining structure use space shell element, and settlement joint is three-dimensional linear elastic spring, and each spring with six freedom degrees is used to simulate the force and deformation of settlement joint.
Acknowledgements This work was financially supported by the Gansu Natural Science Foundation (1107RJYA276).
Calculation of the Loads on Linings of Subway Tunnels Constructed in Physically Nonlinear Soil Masses, Journal of Mining Science Volume 38, Number 5, 418-424, DOI: 10.1023/A:1023975313128
Dong-Mei Zhang, Hong-Wei Huang and Jian-Ming Wang, “Numerical Study on the Effect of Grouting on Long-Term Settlement of Tunnels in Clay,” Computational Science–ICCS 2007, Lecture Notes in Computer Science, 2007, Volume 4489/2007, 1114-1121, DOI: 10.1007/978-3-540-72588-6-177

In addition, selection of fiber materials have great influence on the fabric light-proofness.
Relationship of materials and transmittance.
Shanghai Textile Science & Technology, 38(5):48-49.
Journal of Textile Research, 3(5):31-33.
Journal of Textile Research, 32(3):70-76.

Meihod Materials 1) Water reducing agent.
Journal of Construction Materials, 1998, (3): 19-25
Concrete materials in the 21th century: environment protection concrete [J].
Journal of Shandong Building Materials, 2004, (2): 37-40
New Building Materials, 2007 (9): 77-81

., Laboratory of material properties at high temperatures, Podnikatelská 565, 190 11 Praha – Běchovice, Czech Republic 4Institute of Physics of Materials, Academy of Sciences of the Czech Republic Žižkova 22, 616 62 Brno, Czech Republic apospisilova@fme.vutbr.cz, bkianicova@tnuni.sk, cvlasak@svum.cz, dhutar@ipm.cz, epodrabsky@fme.vutbr.cz Key words: creep, damage parameter, microstructure changes, rafting, image analysis.
Nickel-based creep resisting alloys (strengthened by γ´) are the basic materials for high-temperature constructional parts in aircraft engines and energy units.
Experimental details Material.
Juliš: Materials Science Forum, Vol. 567-568 (2008), p. 273-276 [8] R.
Bína: Engineering (SK journal) 29, Vol. 7 (1979), p. 389.

Teaching Materials are Out of Date and Lack of Combination With Modern Professional Practice.
Teaching materials that are able to find are short of specialization and versatility.
Teaching materials do not include actual specialized knowledge.
Chosen teaching materials and teaching material contents should have the characteristics of repletion, novelty and times and continue to update with the development of the society.
Capacity and conditions of the schools can write their own specialized foreign language teaching materials.