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Introduction Statistical materials showed [1] that the workload of mechanical and electrical products assembly is 30% to 70% of total workload in modern manufacturing industry, therefore the quality of assembly process has a critical influence on the final product and the representation of assembly process information is the basis of assembly process planning, analysis, simulation and subsequent production arrangements.
Acknowledgements This work was supported by the National Natural Science Foundation of China (51075022), Beijing Municipal Education Commission (Build a Project) and the postgraduate innovation funding of Beihang University.
[2] QIAO Lihong, ZHANG Jin: Key Engineering Materials, Vol. 407/408 (2009), p. 298-302
[8] Wei Zhiqiang, Wang Xiankui, Wu Dan: Journal of Tsinghua University(Science and Technology), Vol. 42(2002), p. 802-805.
In Chinese [9] Huang Xuewen, Fan Yushun: Chinese Journal of Mechanical Engineering, Vol. 41(2005), p. 97-102.

Table 1 Test performances of the equipment Parameter Value Parameter Value Accuracy of axes XY[μm] 2 Max speed of axis S [mm/s] 10 Stroke of axes XY [mm] 260 Inchworm stroke [mm] 120 Accuracy of axes ZS [μm] 1 Inchworm speed [mm] >4 Stroke of axis Z [ mm] 60 Max peak current [A] 50 Stroke of axis S [ mm] 120 Pulse width [μs] 1-200 continuously Rotating speed of axis R [r/min] 50~200 Pulse interval [μs] 1-200 continuously Inner flushing pressure [MPa] 0~4.2 Voltage [V] 60,90,120,150,200 external flushing pressure [MPa] 0.1 Runout error of electrode [μm] <25 when distance between electrode end lap and guide< 11 mm Table 2 Experiment parameters Parameter Value Parameters Value vlotage [V] 90 Inner flushing pressure [MPa] 3 Pulse width [μs] 16 Material of workpiece Inconel 718 Pulse interval [μs] 40 Material of electrode Brass Peak current [A] 6 Speed of axis R [r/min] 100 Working fluid Pure water Diameter of electrode [μm] 504 Fig. 6 Vertical holes
Acknowledgements This research is supported by Tsinghua University Initiative Scientific Research Program (Grant No. 20131089209), National Natural Science Foundation of China (Grant No. 51305230), Beijing Higher Education Young Elite Teacher Project(Grant No.YETP0084), Horizontal Subject Cooperating with Wuxi Micro Research Precise Machinery Technology Co.
Thole: Journal of Propulsion and Power, Vol. 22 (2006) No.2, p.249 [2] R.S.
Bunker: Journal of Turbomachinery, Vol. 131 (2009) No.4, p.041018 [3] S.H.
Kim: Materials Science and Technology, Vol. 22 (2006) No.1, p.21 [4] F.N.

The analysis of contractor’s risk clause based on the FIDIC construction contract GUO zhanglin1,a, HU yazhen2,b, LIU jun’e3,c 1 GUO Zhanglin ,Department of civil engineering , North China Institute of Science and Technology, East Yanjiao,Beijing,China,101601 2 Management science and engineering, Economic management institute, Hebei University of Engineering, Handan, China; 3 LIU Jun'e ,Information school ,Beijing Wuzi University, Beijing, China 101149 aemail:gg_zz_ll@163.com, bemail:15097694812@163.com cemail:zl-je@163.com Keywords: FIDIC; Construction contract conditions; Construction contract Contractor Risk clauses; Reasonable distribution Abstract: Contractors for the construction of the risk in the contract clause clear analysis is an important content of construction project risk management.
To this, the contractor shall carefully study the landlord will provide the information before bidding and included in the cost of risk in the bid price quotations, the contractor should also recognize that this commitment is adequacy in the landlord will provide the data under the condition of the real or not deliberately hide[8]. 4.2.2 Equipment, materials and process of the risk of defects The FIDIC construction demonstration in the text stated in the contract, the contractor shall provide on our materials, equipment, technology, take full responsibility for the technical proposal is to undertake the defects caused by all risks.
Journal of international economic cooperation. 2007.04
Journal of chong-qing construction. 2007.07

Study of surface characteristics of T700 carbon fibers and interfacial properties of their reinforced epoxy composites Lingcong Li1, Lili Wang1, Hua Hao1, Hui Ling2, Hongjie Sun 2, Yunhua Yu1,*, Xiaoping Yang1 1State Key Laboratory of Organic-inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China; 2Aerospace Research Institute of Materials & Processing Technology, Beijing 100076,China 1,*email: yuyh@mail.buct.edu.cn Keywords: carbon fiber;surface characteristics;interfacial properties;composites Abstract: The purpose of this paper is to comparatively study the surface characteristics of domestic and Toray T700 carbon fibers (T700-CFs) and the interfacial properties of their reinforced epoxy composites.
The purpose of this research is to provide some scientific and useful guidance for the application of T700-CF reinforced resin composites. 1 Experimental 1.1 Materials Commercially available T700-CFs (made in China) and Toray T700-CFs (made in Japan) were used as reinforcement in the work.
[11] Ashida M., Noguchi T.: Journal of Applied Polymer Science. 30(1985),1011-1021 [12] Luis I, David P.: Journal of Applied Polymer Science. 67(1998),1819-1826

Each of them have advantages and disadvantages in order of costs, building time, processing difficult, materials, etc
A wide number of Additive Manufacturing equipment are able to fabricate the part in different materials.
The benchmark artefact has been built in two different technologies and in three different materials.
SLA tecnology equipment has also been included in order to complete the study in terms of comparasion of materials, software, technology and results.
Forster Materials Testing Standards for Additive Manufacturing of Polymer Materials: State of the Art and Standards Applicability, NIST (2015) [7] Shawn Moylan, John Slotwinski, April Cooke, Kevin Jurrens, and M.

In addition, materials needed in traditional manufacturing resource plan may not be produced due to insufficient or not immediate raw material supply, or insufficient productivity or lack of ability for production.
The supply chain based BOM could solve this problem to some extent by introducing information on the productivity of all suppliers of node materials and turning into enterprise's useful capacity.
As shown in figure 1, in case of change A's BOM in the suppliers of B and C, lower nodes also change, and even B and C could be replaced by other materials that meet A's composition requirements.
Ma: Chinese Journal of Management,Vol.07(2010),pp.1221-1227
Liu: Journal of System Simulation, Vol.23(2011), pp.1559-1562

However, it is significantly superior to these materials in inducing proliferation of the human osteoblast cell line.
Cell attachment and proliferation on these materials, titanium and polystyrene were investigated.
Dunnett's test [9] was used in both the attachment and proliferation assays to compare the control material (polystyrene) with the other tested materials.
As no phases were detected, none of the three materials had decomposed at 1200°C.
In contrast, there is no significant difference among the remaining materials for cell proliferation.

Volcanic rocks can be one of the materials that effectively replace part of Portland cement and aggregate for mortars [7, 8, 9].
Voronin, The use of ash removal in concrete and mortars, Building materials 2.
The use of ash removal in concrete and mortars, Building materials. 2 (1992) 20-21
Goretskaya, Dry construction mixtures with the use of mineral waste from the industry of Kazakhstan, Building materials. 11 (2001) 9-11
Akhmatov, The effectiveness of using local building materials and concrete (Elbrus, Nalchik, 1986)

Mechanical properties of composite materials used in the model are listed in Table 1.
Composite materials Three-dimensional Hashin criterion was adopted to predict the failure of composite layers.
In finite element model, the eigenvalues of damage tensor D are set to constant for composite materials.
International Journal of Adhesion & Adhesives 2013; 45: 69–76
Danage tolerance analysis of adhesively bonded repairs to composites structures. 18TH International Cconference on Composite Materials.

The research on making oily sludge as materials to prepare adsorbents is comparatively few[3-5].
Journal of hazardous materials, 2013, 261:470-490 [3] Chen P, Kan L B.
Advanced materials research, 2013, 671-674: 2746-2749 [4] Song W, Liu J G, Nie Y F, et al.
Sewage sludge-derived materials as efficient adsorbents for removal of hydrogen sulfide [J].
Journal of Hazardous Materials, 2006,137 (1): 359-366 [8] Deng H, wang R S, Ren W, et al.