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Introduction Functionally graded (FG) porous materials, such as functionally graded steel foams, are one of the emerging engineering materials in which internal pores are non-uniformly distributed within the structure to allow the mass density gradient to be treated as a new design variable.
Eslami, Buckling analysis of a functionally graded thin circular plate made of saturated porous materials, Journal of Engineering Mechanics. 140 (2014) 287-295
Gilchrist, Designing the energy absorption capacity of functionally graded foam materials, Materials Science and Engineering: A. 507 (2009) 215-225
Ashby, The mechanics of three-dimensional cellular materials, Proceedings of the Royal Society of London A: Mathematical, Physical and Engineering Sciences. 382 (1982) 43-59
Lakes, Analysis of elastic modulus of conventional foams and of re-entrant foam materials with a negative Poisson's ratio, International Journal of Mechanical Sciences. 37 (1995) 51-59.

The Society of Materials Science, Japan. 38 (1988) 816-824
Materials Review. 22 (2008) 10-13
Journal of Materials Engineering. 2 (2014) 34-38
Journal of Lanzhou Railway Institute. 16(1997) 67-72
Journal of the China Railway of Society. 32 (2010) 33-37.

Introduction The concrete is one of the most important engineering materials, and its history of humans using is over two hundred years.
Concrete: microstructure, properties and materials [M].New York: MeGraw Hill,2005
(in Chinese) [3] WU J Y,AN X H,TIAN B P.Status and Progress of Non-destructive Test Method in Concrete[J].Journal of Sichuan University of Science & Engineering(Natural Science Edition),2009,22(4):4-7.
Journal of Materials in Civil Engineering, 2003, 15 (3) : 210-211
Journal of Shanxi Datong University(Natural Science), 2011, 27(4):69-71.

Microwave technique is well suitable for characterizing the properties of nonconductive or weakly conductive materials in noncontact way.
Methods Materials.
Qin: Journal of Applied Polymer Science Vol. 124 (2012), p. 4070-4080
Journal of Pressure Vessel Technology, 2010, 132: 051501-1
Qin: Journal of Applied Polymer Science Vol. 124, (2012), p. 4070-4080

Piezoelectric materials can exchange between mechanical energy and electrical energy.
It has a strong piezoelectric properties, but also has good flexibility of polymer materials, acoustic impedance is low, easy to match with the air and water, etc., it is a combined two-phase material advantages of the new piezoelectric materials[1-4]。
The 1-3 type piezoelectric composite and a second composite piezoelectric substrate, forming the novel piezoelectric composite materials.
Novel composite material preparation process Fabrication the novel piezoelectric composite materials by means of cutting - filling method.
Phys., 1979 50(7) [7] T.R.Gururaja, et al., Piezoelectric Composite Materials for Ultrasonic Transducer Applications.

Effects of Calcination Temperature on Crystal Structure of Pr-Nd Oxides Huiqing Li1, a, Ruixiang Zhang2, a, Haiwang Liu2, b, Shizhi Wang2, c, and Xianku Hao2,d 1School of Materials and metallurgy, Inner Mongolia University of Science and Technology, Inner Mongolia, Baotou, 014010, China 2Baotou Jingrui New Material Company Limited, Inner Mongolia, Baotou, 014015，China 1,alihuiqin42@163.com, 2, a btzrx @163.com, 2, b liuhw@brire.com, 2, c nmgbtwsz@sohu.com, 2, d hxku@163.com Key words： Pr-Nd binary oxide; calcination temperature; structure Abstract: Ammonium hydrogen carbonate is taken as the precipitating agent to prepare Pr-Nd carbonates from the raw material of Pr-Nd chloride solution.
Experiment Materials.
Journal of Applied Physics, 1998, 83(5): 2715-2718
The Chinese Journal of Nonferrous Metals, 2005, 15(2): 321-327
Materials Letters, 2004, 58(15): 2076-2081

The previous researches on brazing method [3-7] are usually focused on brazing process to improve functions of brazing materials.
The base and brazing materials are C1220-O and BCuP-3S and their material properties are shown in Table 1 and 2, respectively.
Zhou: Materials Characterization, Vol. 52, No. 4-5, (2004), p. 309-318 [5] Shaohong Wang, Heping Zhou and Yuping Kang: Journal of Alloys and Compounds, Vol. 352, No.1-2, (2003), p. 79-83 [6] Jong-Bum Lee and Jei-lip Cho: Journal of the Korean Society for Quality Management, Vol. 28, No. 4, (2000), p.16-28 [7] Hendrik Schabe and Beinard Vietrl: Engineering Fracture Mechanics, Vol.50, No.2, (1995), p. 203-217 [8] K.W.
Jhang and J.K.Kim: Key Engineering Materials, Vols. 321-323, (2006), p. 1522-1525 [9] K.W.
Kim: Key Engineering materials, Vols. 326-328, (2006), p. 1043-1046

Raw Materials and Experimental Methods Materials The slag was obtained from capital steel Company, Beijing, desulfurization gypsum was obtained from the Shijingshan Power Plant, Beijing, and the chemical composition of the slag and desulfurization gypsum was listed in Table 1.
Cylindrical specimens were prepared with diameter of 50 mm, high 50 mm, and the volume was 100 cm3 according to specification for construction and acceptance of fly ash-lime-stabilized materials for road base.
Calculated for each block of total quality for 224.72 g (including dry salted soil for 197 g, water 27.72 g) according to test methods of materials stabilized with inorganic binders for high way engineering.
Chen, et al, Highway-related dividing scheme of salty soil, Journal of Chang’an University, 6 (2006) 12-14
Huo, et al, Engineering application of saline soil after modification, Journal of University of Science and Technology Beijing, 5 (2007) 456-460

In the present study, the erodible bank is composed of non-cohesive materials in the experimental channel.
The bed and bank materials were uniform sediment with diameter d= 0.08mm.
The erodible bank is composed of non-cohesive materials in the experimental channel.
International Journal of Sediment Research, 366-378 (2010)
Journal of Hydraulic Engineering, ASCE, 126(1):4-15 (2000).

Based on FE Method to research Resistant Rutting Ability of Pavement Structure in Heilongjiang Province Cao Peng1,a, Feng De-cheng1,b, Jing Ru-xin1,c 1School of Transportation Science & Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, 150090 acaopeng518888@126.com, bfdcgxy@vip.sina.com, caubrzn@yahoo.com.cn Keywords: pavement engineering; visco-elastoplastic; moving load; ABAQUS.
Tab1.Material parameters of structure layers Material 20°C modulus （Mpa） 15°C modulus （Mpa） Split strength （Mpa） AC16 1200 1800 1 AC20 1000 1400 0.8 Base 1350 1350 0.5 Subbase 1300 1300 0.4 Subgrade 160 160 3.
In material factor, Modified Asphalt should be using to enhance the cohesion of the gradation.
[2] Jones R, Horner D, Sullivan P etc. in: A methodology for quantitatively assessing vehicular rutting on terrains [J].Journal of Terramechanics, 2005,42(3/4):245-257
[J]journal of southeast university (natural science edition)