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While the raw materials are selected, the fireproof coating and sand are chosen well, the sand box is designed according to the technology, pouring system is calculated, under the above operation strictly, such as air hole can be avoided.
(Nature Science Edition) ,2006, 34(11):19-21
Huazhong University of Science&Technology,2007
Applied Surface Science ,1999 ,139: 434-438
International Journal of Plant Engineering and Management,2006,11(4): 247-250.

Once the crack extends to critical length, the part between cracks and surface materials will peel off into wear debris under the role of shear stress.
Li: Advanced Materials Research Vols. 189-193 (2011), pp. 3721-3725 [2] S.Y.
Yang et al: Journal of Materials Engineering Vol. 6 (2008), pp72-74 [3] Z.L.
Yan, H.Ye: Laser Journal Vol. 2 (2006), pp. 73-74 [4] A.G.
Shen, et al: Chinese Journal of Lasers Vol. 35 (2008), pp.1698-1709

Materials and methods Experimental design.
Table 1 OC, ON and C/N ratio of the investigated soil and organic materials.
The mineralization rates of organic materials ranked in the order: RS>AF>MS.
The addition of organic materials increased the amount of fresh organic matter in the soil, thus MBC in the soil after organic materials treatment was significantly higher than the control.
Zhang: Chinese Journal of Soil Science.

In order to purification of natural gas, we need to find a kind of materials with high adsorption capacity for impurity gas while low adsorption capacity for methane gas.
The introduction of AEMs weakens the adsorption of CH4 since ΔEads of CH4 on other materials as graphene functionalized20-21.
Sakr, Natural gas origin, composition, and processing: A review, Journal of Natural Gas Science and Engineering. 2016, 34, 34–54
Furthmüller, Efficiency of ab-initio total energy calculations for metals and semiconductors using a plane-wave basis set, Computational Materials Science. 1996, 6, 15–50
Najafi, Theoretical investigation of methane adsorption onto boron nitride and carbon nanotubes, Science and Technology of Advanced Materials. 2010, 11, 045001

The body materials is lightweight, high strength, residence seismic performance, the use of area is larger than other constructions, and it has a well architecture quality , most building materials is recyclable.Put light steel structure system widely used in residential buildings,has a high sense of environmental protection.
To play the advantages of light steel structure construction, in addition to use light steel components to complete the main structure of the residence, In the construction process, also need to use a variety of new wall materials, new windows, doors, and insulation materials.
The particularity light steel structure residence make it change move and demolition easily, in the residential life cycle ended, most of the building materials can be recycled.
As the building materials of the highest utilization of recyclable materials, the recycling rate of up to 100%. effectively avoiding a lot of construction waste.
Journal of Chongqing Jianzhu University, Vol. (3) 2007 ,P.87-89(In Chinese) [7] Yuheng Sun: Journal of Chongqing Jianzhu University, Vol. (3) 2007, P.106-108(In Chinese) [8] Xiuhua Bai: knowledge economy, Vol. (16)2010, P.115(In Chinese)

Introduction The biomedical absorbable hemostatic materials have got more and more attention of people with the continuous development of medical technology.
In order to enhance the properties of hemostasis of chitosan and its derivatives hemostatic materials, ion or medication with function of hemostasis and anti-inflammatory could be composited [9,10].
Materials and Methods Materials and Equipments.
The kinetic energy materials.
Xu: Science and Technology of Food Industry, Vol. 28 (2007) No.11, p.81

Seepage coefficient of the dam body materials Materials Seepage coefficient (cm/s) Grouting curtain 1.00×10-5 Cushion（2A） 5.56×10-2 Special cushion（2B） 5.15×10-3 Transition material（3A） 1.99×10-1 Main rockfill material （3B） 3.16×10-1 Downstream rockfill material（3C） 1.00×10-1 Concrete slab（F） 1.00×10-8 Composite geomembrane 5.00×10-12 Table 2.
Journal of Hohai University (Natural Science).
Applied Mechanics and Materials.
Journal of Hohai University (Natural Science).
Journal of Hohai University (Natural Science).

bamboo fiber maked as reinforcement by above methods can were used to make variety of composite materials, its products being further developed [2,3].
Process and test of bamboo fiber Process of bamboo fiber Materials The sinocalamus bamboo used in this experiment harvested at 1 years of age from Sichuan province.
Yang Yunfang calculated that modulus of fiber in bamboo was 27.6GPa according to the mixed rate of composite materials [7].
Journal of Applied Polymer Science，Forum Vol. 1(2000), p.83 [4] Zhang Wei, Li Wenbin,Yao Wenbin:Journal of Beijing Forestry University.
(In Chinese) [7] YangYunfang,Liu Zhikun:Journal of Zhejiang Forestry college Vol. 13 (1996), p.27 (In Chinese)

Journal of Civil Engineering and Management, 18 (1), pp. 81-90 (10 p).
Applied Mechanics and Materials, Vols. 249-250, pp. 1087-1098 (12 p).
Applied Mechanics and Materials: Mechatronics and Applied Mechanics II.
Applied Mechanics and Materials, Vol. 188, pp. 177-182 (6 p).
Applied Mechanics and Materials, Vol. 137, pp. 95-99 (5 p).

It has been commonly accepted that, the fracture is controlled by stress intensity factor (SIF) in the linear elastic materials, and the characteristics of SIFs have been studied by a number of authors [1-5].
Acknowledgments This work was supported by the National Science Foundation for Distinguished Young Scholars of China (Grant No.11325211) and the National Natural Science Foundation of China (Grant No.11672147).
Dai, Crack arrest behavior of central-cracked stiffened plates under uniform tensions, International Journal of Mechanical Sciences, 133 (2017) 704-719
Sun, Fracture analyses of cracked delta eye plates in ship towing, in: IOP Conference Series: Materials Science and Engineering, IOP Publishing, 2018, pp. 012028
Williams, On the stress distribution at the base of a stationary crack, Journal of Applied Mechanics, 24 (1957) 109-114