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However, research on service properties of materials and equipments with BDF is quite limited, although it is very important due to the raw materials and components of BDF is complex considerably, especially BDF has high hygroscopicity, easy to absorb water from the atmosphere to generate organic acid during the storage and use lead to cause corrosion [6-12].
It is very necessary to further study on fatigue strength and fracture mechanics of BDF devices because those were affected by many factors such as raw materials, temperature and humidity and so on during practical application [17-20].
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Materials and Method 2.1 Materials.
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Gogia, Tensile behaviour of aluminium 7017 alloy at various temperatures and strain rates, Journal of Materials Research and Technology. 5(2016) 190-197.

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Calculation and Discussion As an example, the composite laminated targets consist of two types of aluminum foam materials with mass density 200 kg/m3 and 400 kg/m3.
The two kinds of aluminum alloy foam materials are configurated to form laminated composite structures.
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Introduction The Eu2+ doped or Eu2+,Dy3+ co-doped strontium aluminates are an important class of phosphorescent materials for their quantum efficiency in the visible region and have been reported by lots of researchers[1-4].
[2]Xibin Yu, Chunlei Zhou, Xianghong He, Zifei Peng, Shi-Ping Yang, Materials Letters 58 (2004) 1087
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[14] Xibin Yu, Chunlei Zhou, Xianghong He, Materials Letters 58 (2004) 1087.

The maintenance works in the near future requires the use of new materials.
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[11] ISRM "Suggested Methods for Determining the Uniaxial Compression Strength and Deformability of Rock Material", International Journal of rock Mechanics and Mining Science, Vol. 16, (1979) 137-140

Table.2 Mix proportion and Property of concrete Constituent material proportion of concrete /kg.m-3 Material property/MPa Material type Cement Sand Gravel Water Fly ash Water reducer Compressive strength Modular C30 276 786 1101 176 58.46 4.872 32.2 3.15×105 C40 337 757 1065 176 71.37 5.948 42.6 3.32×105 C50 405 726 1025 176 85.71 7.154 47.5 3.50×105 Each group has two batches, corresponding to different steel surface condition.
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Journal of Guanxi University (natural science edition), 35(1):17-23. (2010) （in Chinese） [11] S.F.
Smmarized review of the bond-slip problems of concrete filled steel tubes (CFST), Journal of Xi’an University of architecture & technology (natural science editon) ,38(3):321-326. (2006) （in Chinese）

With the development of earthquake investigation and study method, the massive precious macro earthquake disaster materials are accumulated.
Test Materials and Test Procedure The original soil is taken from the site of Yangtze bridge of China.
The physical properties for the testes materials are shown in Table 1.
Chinese Journal of Geotechnical Engineering, Vol.24(2), (2002), p.142-146（In Chinese） [5] Yazdi A M.
Journal of Hydraulic Engineering, Vol.140(10), (2009), p.1184-1188（In Chinese） [13] Wang Y, Wang Y.

The theme of the circular economy concept is the exchange of materials, where one facility’s waste, including energy, water, materials - as well as information - is another facility’s input.
Journal of Xi’an Jiaotong University(Social Sciences Edition).
The Journal of Quantitative & Technical Economics.
The Journal of Quantitative & Technical Economics.
Journal of China University of Mining and Technology (Social Science).

The fluorescence spectra of these materials present a series of narrow lines assigned to 5D0 → 7F0,1,2,3,4 transitions.
Therefore, luminescent property of rare earth elements are more than the other elements in a large number of luminescent materials.
At the present time, luminescent property of Eu 3+ and Tb 3+ organic complex are studied, which are incorporated in inorganic layered solid porous materials and amorphous Si-glass [4,5] .
However, a few rare earth complex incorporated in high-order mesoporous materials such as MCM-41 have been reported in the literatures.
Acknowledgements We are grateful to the National Natural Science Foundation of China (NO. 20171015).