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In the meso-mechanics level, the concrete is taken as the composite material consisting of aggregate, mortar and interface between them.
Hansen: ACI Material Journal, Vol. 96 (1999), p.196 [5] Chun-an Tang, Wancheng Zhu: Concrete Damage and Fracture-Numerical Simulation (Science Press, China 2003)
Van Mier: Material Engineering of Cement based Composites using Lattice Model (WIT Press, USA 1999)

In general, most research has focused on primary wood production processes, needed to produce materials with specific characteristics.
There are many different methods to cut materials; routing process is often used to compare different material wear on the cutting tool.
Differences also exist when these materials are compared to solid wood.
A better understanding of the necessary process parameters to cut these materials will lead to the improved results with respect to tool wear and surface roughness [2-8].
An Investigation of the Optimal Cutting Conditions in Parawood (Heavea Brasiliensis) Machining Process on a CNC Wood Router,Kasetsart Journal (Natural Science), Vol. 40 (5) (2006), p. 311-319

The strategy acknowledges building materials as one of the principal physical resources in production and improvement of shelter.
To this end, earth has been used as cheap building materials for thousands of years in all parts of the world [5, 6].
Building Materials for low-income Housing-Asian and Pacific Region.
[2] UN-Commission on Human Settlements: Appropriate Intermediate, Cost Effective Building Materials, Technologies and Transfer Mechanism for Housing Delivery.
Quarterly journal of Engineering Geology and Hydrodynamics, 39, p66-72, (2006)

Materials and Methods Sample collection and processing.
The reduction in Cu is thought to be as a result of the general rise in metal prices, therefore, designs aimed at reducing costs by reducing amounts of raw materials are now used.
There are currently no specific regulations in the country to restrict toxic materials in ICT equipment.
SB 20 Report, Hazardous Materials Laboratory, California, 2004
Official Journal of the European Union, L37:19-23, 2003

RCC is a material used in the construction of dams and pavements [2].
Experimental Materials and Methods Materials Cement, Chinese 52.5 Portland cement (medium heat), from Guangxi province, the mineral composition and strength of it was follows: C3S, 50.77 %; C2S, 21.57 %; C3A, 3.06 %; C4AF, 16.28 %; compressive strength: 3d, 30.4M Pa; 7d, 44.0 MPa; 28d, 60.2 MPa.
The chemical compositions of these materials are shown in Table 1, the physical property of fly ash is shown in Table 2.
Table 1 The chemical composition of materials /% Item SiO2 Al2O3 Fe2O3 CaO MgO SO3 L.O.I ∑ Cement 20.90 4.57 5.35 60.91 3.81 2.59 1.48 99.61 Fly ash 46.53 27.69 16.52 2.56 1.45 0.80 3.82 98.57 ExI 10.95 2.74 0.93 48.02 31.78 0.03 2.97 97.42 ExII 14.29 2.54 1.05 39.46 38.31 0.05 3.02 98.72 ExIII 2.11 0.36 0.59 0.88 95.34 0.02 0.50 99.80 Note：ExI- expansive agent I; ExII- expansive agent II; ExIII- expansive agent III.
[2] ACI Committee 201, Roller compacted mass concrete, ACI materials journal, 85(5), 1988, pp. 400-444

The film properties of this coating has excellent weathering resistance, durability, film-forming and a rich source of raw materials, so the simple production process of acrylate polymer emulsion is obtained a wide range of applications in the preparation of elastomeric emulsion.
The organic-inorganic composite emulsion, which is prepared by the method of mixing the inorganic nano-materials and the aqueous polymer latex compound, can significantly improve the tensile properties, thermal stability, weather resistance and other properties.
Preserving heat for 2h, cooling to room temperature and adjusting pH=7 to 8, filtering the material.
Preserving heat for 2h, cooling to room temperature and adjusting pH=7 to 8, filtering the material.
Journal of Applied Polymer Science, 2006, 1 (100): 824 - 830

The material originated from the same batch as that used in the previously published test series [9].
The material is modeled with kinematic hardening using a bilinear model.
Acknowledgement The authors affiliated to CTU in Prague would like to acknowledge the support from the Czech Science Foundation within the 23-06130K project.
Mutoh, “Mechanisms of Fretting Fatigue,” JSME International Journal, vol. 38, no. 4, 1995
John, “Fretting fatigue crack analysis in Ti-6Al-4V,” in International Journal of Fatigue, Oct. 2005, pp. 1582–1589. doi: 10.1016/j.ijfatigue.2005.07.008

Analysis of Flow Field for Link Rod Butterfly Valve Xuedong Ma1, a, Jie Teng2,b 1 School of Mechanical Engineering and Automation ,University of Science and Technology Liaoning Liaoning, Anshan ,Liaoning Province,114051, China 2 School of Mechanical Engineering and Automation ,University of Science and Technology Liaoning Liaoning, Anshan ,Liaoning Province,114051, China amadong912@126.com , btengjie654321@163.com Keywords: Link rod butterfly valve, Flow field, Finite element Abstract: The link rod butterfly valve relies on the link mechanism inside the flow channel to realize opening.
Building analysis project of COSMOSFloworks and setting the boundary condition Material attribute setting and initial condition setting about the hot air depend on the analysis guide of COSMOSFloworks.
[4] Xinming Yuan,Genhai Mao, The numerical simulation of flow field and resistance Characteristics of Valve Pipe, Journal of Hydroelectric Engineering, 1999(4) :60-65

Non-coal strata appears gas generally in three ways: one situation is a structure connect coal strata of outside the tunnel site or tunnel deep; The second situation is although there is no coal strata in tunnel site, some black carbonaceous strata and mudstone has been reached generation gas phase, with the material basis for generating gas; The third situation is the compound action product of previous two cases.
Journal of Railway Engineering Society, 2010, 5(5):39-42(In Chinese)
Jiangxi Coal Science, 1999 (4) :24-58(In Chinese)
Communication of Science and Technology, 2004,9 (123) :9-14(In Chinese)

A Measuring Method of Flexible Bar based on Machine Vision Shaowei Liu1,a, Wu Liu1,b, Guoqing Ding1,c, Xin Chen1,d 1Department of Instrument Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, China 200240 aanry@sjtu.edu.cn, ballenlau@sjtu.edu.cn, cgqding@sjtu.edu.cn, dxchen.ie@sjtu.edu.cn Keywords: Flexible Bar, Machine Vision, Finite Element Analysis, Thickness, Bending Rigidity Abstract.
In the model, the settings of modeling are as following: the flexible bar’s diameter is 1.6 mm; its length is 19.2 mm; the thickness of thin neck is 20 mm, and the distances between the position of the minimum thickness and two endpoints are 10.8 mm and 8.4 mm; its material is beryllium bronze; its density is 8.3 g/cm3; its Young modulus is 133 GPa; its Poisson's ratio is 0.4.
Acknowledgements This research has been supported by the National Nature Science Foundation of China (No.50905116).
Guarnieri: Journal of Applied Physics Vol.11 (1979), p.6761 [2] K.