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Ferroelectrics materials have played important roles in microelectronics applications such as capacitors and computer's RAMs.
Many attempts on both theoretical and experimental approaches have been done on ferroelectric materials due to their vast ground in industrial demands [1, 2].
As one of promising methods in modifying ferroelectric materials' electrical properties, doping has drawn many attentions from scientists.
However, after doping, the electrical properties of ferroelectric materials can vary over time for certain duration due to the movement of static dipoles formed by dopants.
The phenomenon is called aging effect, which was discovered that it can improve dielectric properties for certain ferroelectric materials such as BaTiO3 [3].

Journal of Tongji University (Natural science), 1995, 23(3): 315-319.
Journal of Hohai University (Natural science), 2003,31(2): 175-179.
Journal of Chong qing Jiaotong University (Natural science), 2010, 29(6): 942-946.
Beijing: China Building Materials Industry Press, 2002
Numerical simulation of the deformation in the interface between soil and structural material[J].

In recent years, many scholars have studied material properties and the constitutive relation of the middle ear[7-10],which provides a lot of valuable information for human ear research.
Acknowledgments We thank the support of the National Natural Science Foundation of China (11072143, 11272200).
Medical Engineering & Phys-ics, 2006, 28: 395-404 [5] Wenjuan Yao，Xin-Sheng Huang, Li-Jie Fu, Transmitting Vibration of Artificial Ossicle, International Journal of Nonlinear Sciences and Numerical Simulation，2008，9(2):131-139
Numerical simulation and study about partial ossicular replacement prostheses with several various materials on hearing restoration [J].
Journal of The Mechanical Behavior of Biomedical Materials, 2009, (2): 82-92 [11] Gan R.Z., Reeves B.P., Wang X., Modeling of Sound Transmission from Ear Canal to Coch-lea [J].

International Journal of Mechanical Sciences, 37:1295-1305, 1995
Materials Science and Engineering A, 483-484:394-397, 2008
Materials Science and Technology, 20:1506-1512, 2004
International Journal of Mechanical Sciences, 40:173-182, 1998
JSME International Journal, 35:201-209, 1992

The reason and countermeasure for the disease of pavement should be accorded with the asphalt, aggregates, materials and site construction technology followed and other relevant norms and standards.
References [1] XU Yong-li, Evaluation Indexes for Anti shearing Performances of Asphalt Pavement Based on Core Samples.Journal of Northeast Forestry University, Vol 10,pp. 2-3, May 2009 (In Chinese)
Journal of Highway and Transportation Research and Development, Vol 5, pp. 23-24 2006(In Chinese)
Science Technology and Engineering, Vol 08, No. 6, 2008(In Chinese)
[6] TAO Jia-xi ,Discussion on Segregation of Pavement Asphalt Mixture, Research & Application of Building Materials, No. 03,2006(In Chinese).

Oiqeat, Materials Science and Engineering, Vol.390A(2005), p. 166 [3] D.
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Mercer, W.G.Green, Light Metal Age, Vol. 6 (1990),p.12 [13] S.Kudela, International Journal of Materials and Product Technology, Vol. 18(1-3)(2003),p. 91 A.
Sodelet, Materials Research, Vol. 14(8)(1999),p.3185 [17] Z.XU, Z.Q.LI, S.Wang, The Chinese Journal of Nonferrous Metal, Vol. 11(2)(2001),p.167 [18] G.Rosas, R.Perez, Materials Science and Engineering Vol. 298A(2001),p.79

Based on the last years necessity of lighter materials and safer usage of vehicles we try to come with a new class of materials for bumper systems.
Science. 37 (2006) 246–268
In: Smart materials, structures and NDT in Aerospace.
Hanu Cimpoeşu, Effect of stress on damping capacity of a shape memory alloy CuZnAl, Journal of Optoelectronics and Advanced Materials. 12 (2010) 386-391
Stanciu, Behavior simulation of a copper based shape memory alloy under an external solicitation, Journal of Optoelectronics and Advanced Materials. 12 (2010) 1772-1776

Both the two group had employed the same teaching materials, syllabus, and teaching hours.
The evaluation was conducted with Likert-type scales – a grading system frequently applied in social sciences, i.e. from 1 (completely disagreed) to 7 (fully agreed).
Chinese Journal of School Health.
Journal of Tianjin Institute of Physical Education, vol. 24(2009), p. 172-174
Journal of Social Behaviour and Personality, Vol. 3(1996), p. 521-530

Acknowledgements The authors gratefully acknowledge the financial support of the National Science Foundation of China (Project Nos. 50978026, 51078030, and 51278048), the Beijing Natural Science Foundation (Project No. 8122035), and the China Ministry of Education (Project No. 20100009110014).
Reference [1] Sanjayan G. and Stocks L.J., “Spalling of High-Strength Silica Fume Concrete in Fire”, ACI Materials Journal, March-April, 1993, pp. 170-173
[2] Hertz K.D., “Limits of Spalling of Fire-Exposed Concrete”, Fire Safety Journal , Vol. 38, 2003, pp. 103-116
[4] Janotka I. and Bagel L., “Pore Structures, Permeabilities and Compressive Strengths of Concrete at Temperatures up to 800 °C”, ACI Materials Journal, March-April, 2002, pp. 196-200
[5] Chan Y.N., Peng G.F. and Anson M., “Fire Behavior of High-Performance Concrete Made with Silica Fume at Various Moisture Contents”, ACI Materials Journal, 1999, pp. 405-409

Cladophora has attracted a considerable amount of attention In addition, their large biomass facilitates harvesting for use as raw materials in a range of industrial applications[2].
A number of studies in recent years have employed Cladophora as biological materials, such as adsorption material to prevent and control pollution[3,4,5] and additives in pharmaceuticals [6].
To investigate the biomass of C. glomerata and C. vagabunda, a portion of the samples were randomly selected as materials for the observation of epiphytes and the mucilage comprising EPS.
Ek: Journal of Pharmaceutical Sciences Vol. 22 (2004), p.279–286
Hecky: Journal of Phycology Vol. 44 (2008), p.839–854