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(1) Where C0 and 0φ are the cohesion and the friction angle of rock masses respectively; C1 and 1φ are the cohesion and the friction angle of the rock masses strengthened; τ is the shear strength of the bolt materials; S is the cross-section area of the bolts; a and b are the spaces of the bolts in the two orthogonal direction respectively; η is the effective parameter, normally 10~15.
Acknowledgements This paper was financially supported by the National Science Foundations of China under Grant No. 50709037, 50539090 and 50579091, and Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering, IRSM, CAS under Grant No.
[2] Yan-Xin Zhang, Mei-Feng Cai and Ke-Zhong Wang: Journal of University of Science and Technology Beijing Vol. 27 (2005), p. 520
[4] Bing-Rui Chen and Xia-Ting Feng: Journal of Northeastern University (Natural Science) Vol. 26 (2005), p. 488
[6] Chuan-Qing Zhang, Xia-Ting Feng and Hui Zhou: Key Engineering Materials Vol. 340-341 (2007), p. 1157.

Study on subgrade permanent deformation Study on permanent deformation characters of soil and granular materials are carried out mainly through repeated triaxial tests in doors.
(1) Where: εp – permanent deformation (also called plastic deformation); N – time of loading effect; A, B – material parameter from regression analysis.
Acknowledgements This work was financially supported by the Science and Technology Project of Western Traffic Construction (2008 318 223 12 and 2009 318 740 99) and the Chongqing Natural Science Foundation (cstc2012jjA30008).
Journal of Chang’an University (Natural Science Edition), 2002.22 (1) (In Chinese) [2] Cao Changwei.
Journal of Southwest Jiaotong University. 2000.35 (2): 116-120 (In Chinese) [7] Ling Jian-ming et al.

Investigation and preparation of the SCR catalysts nano-Co/Ce-V-Zr-TiO2 Xiu-feng Ren1,2,a, Fen Wang2, Yuan Zhou1 ,Hong-en Nian1, Yu-na Pang1 and Hong-bin Wang1 1 Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, 810008, China 2 School of Materials Science and Engineering, Shaanxi University of Science & Technology, Xi’ an, 710021, China arenxiufeng1984@163.com Keywords: Nano-Co/Ce-V-Zr-TiO2; Catalysts; Sol-gel; Selective catalytic reduction; Nitrogen oxides Abstract.
Zhao: Materials Science &Technology Vol. 13(1) (2005), p. 1
Richter and Rolf Fricke: Journal of Catalysis Vol. 239(1) (2006), p. 23
Xu et al.: The Chinese Journal of Nonferrous Metals Vol. 17 (2007), p. 795

Direct Torque Control of Brushless DC Motor Long Wu 1a, Liu Yi Ling 2b, Shuai Chen 1c 1Huainan Normal University, Huainan 232001 ; 2 Anhui University Of Science & Technology, Huainan 232001; alwu@hnnu.edu.cn,blyling@aust.edu.cn,cshuaich12@126.com, Keywords: Brushless Motor, Current Commutation Torque Ripple, Matlab Simulation,Direct Torque Control Abstract.
In China rare earth resources are rich and the rotor of brushless motor is constructed with rare earth materials, this further promote the development of brushless motor in our country.
Acknowledgements National Natural Science Foundation (51104003); Natural Science Foundation of Anhui Province (KJ2010B200) Reference [1] Yao Zhiyun, Yang Yuefeng.
Journal of Motor and Control, 2005, vol.9, no 6, pp.533-536.

Motion Performs Evaluation of a Numerical Machine Tool Based on Extenics Theory Chen Liu 1, a, Xiangli Bu 2,b 1 North China Institute of Science and Technology, China, 065201, 2 North China Institute of Science and Technology, China, 065201, aliuchen@ncist.edu.cn, bbuxiangli@ncist.edu.cn Keywords: extenics theory; motion performs evaluation; AHP(analytic hierarchy process); numerical control machine tool Abstract: In order to evaluate motion performs of a numerical control machine tool objectively, the matter-element model for the motion performs evaluation of the NC was established based on extenics theory, the motion performs evaluation indexes of NC was made of multiple elements.
References [1]Zhao Yugang,etc: Technology of Numerical Control, edtied by engineering industry Publishing House, BJ(2003)In Chinese [2]Liu Chen, etc: Quality Evaluation of Belt Conveyor Based on Extenics Theory, Advance Materials Research,Vols.694-697,Mar.2013
[3]Zhang Genbao, etc: A comprehensive evaluation method of fuzzy matter element for CNC equipment quality , Journal of Chongqing University, VOL.34No.1, Jan.2011.
In Chinese [4] Cai Wen,in: Matter-element modle and application, edtied by Literature of Science and Technology Publishing House, BJ(2008).

In Fig.3, the master rack is drivenby the work-piece, the plus material deviation is defined as positive, while the minus material deviation is defined as negative.The relationship between the displacement increment along left & right meshing line(,) and the radial displacement(),tangential displacement() is as follows: （1） 3.2 Measuring Principle The measuring principle of high-speed inspection in workshops of gears pitch deviations based on the double-flank gear rolling test as follows: The displacement of rack probe in radial & tangential direction(, ) is measured when rack probe mesh with left & right flank of the gear to be inspected.
Acknowledgements This research is supported by the Natural Science Foundation of China grant Nos. 51105007.
References [1] Shi Zhaoyao, FeiYetai and XieHuakun, "100 years of gear measurement technology¾review & prospect", Engineering Science, 5(9), 13-17(2003)
Annals of the CIRP 1984,33(1):363~368 [9] Shi Zhaoyao, Tang Jie, Wei Hualiang, et al, “Gear In-line Measuring Machine Based on Double-flank Gear Rolling Test with many Degrees of Freedom”, Chinese Journal of Scientific Instrument, 2009, Vol.30, No.2, pp.303-307
Shanghai Science & Tech.

Experimental research on the frictional effects of the slide-roof system1 ZHANG Liming TIAN Zhichang （Institute of Architecture & Civil Engineering, Inner Mongolia University of Science and Technology） Key words: slide-roof, friction, TMD, roof, isolation, robustness SUMMARY:The experiments of a five-story steel frame on shaking table verify that the slide-roof system can markedly reduce vibration.
The materials of the sliding surfaces are steel-steel, so the static frictional coefficient was about 0.15 and the moving frictional coefficient was about 0.10.
Supported by the fund of Office of Science and Technology, Baotou, China Table 1 Parameters of the experimental models Story Mass(kg) Lateral inter-story stiffness(N•m-1) Story height(m) M-1 M-2 M-1 M-2 1 615 615 3.25×106 3.25×106 0.90 2 615 561 4.58×106 4.58×106 0.80 3 615 615 4.58×106 4.58×106 0.80 4 615 615 4.58×106 4.58×106 0.80 5 720 134 3.82×106 3.82×106 0.85 SRS / 586 / 2.28×105 0.00 Fig.1 Photo of the experimental model Fig.2 Exprimental model of SR Fig.3 The envelops of the displacement histories of the shaking table and Floor 1 excited by harmonic sweep frequency wave with the maximum acceleration 0.57 m/s2 steel-steel kinetic frictional coefficient 0.1 (a) Displacement’s envelop the Shaking table 0 0.5 1 1.5 2 2.5 3 0 20 40 60 Time(s) Disp.
“Optimum friction factor for roof-friction tuned mass damper”, Journal of Tsinghua University (Science and Technology), (S1):, 2002, pp.97-100

Keller, Effect of operational parameters on the recovery rate of an oleophilic drum skimmer, Journal of Hazardous Materials. 148(1–2) (2007) 136–143
Abioye, Comparative Study Of Biodegradation Of Crude Oil In Soil Amended With Chicken Droppings And NPK Fertilizer, Science World Journal.
Fauziah, Bioremediation of Hydrocarbon Contaminated Soil Using Selected Organic Wastes, Procedia Environmental Sciences.
Burgess, UV-visible spectrophotometry of water and wastewater (2 Ed.), Elseviee Science, 2017
Justic, Global change and eutrophication of coastal waters, ICES Journal of Marine Science. 66(7) (2009) 1528–1537.

The materials science research community is currently focussing on both improving traditional materials such as metals, ceramics, polymers and conventional composites, and developing innovative multi-functional nanostructured composite systems.
Colombo: Journal Europ.
Mukherjee: Nature Materials 2 1 (2003), 38-42 [40] G.D.
Guo: Materials Science and Engineering A357 (2003), 392396 [43] M.S.P.
Nature Materials 3 8 (2004), 539-544 [75] R.Z.Ma, J.

They are the basal material for the research of soil and water resource management and assessment, soil erosion monitor and forecast, soil erosion physics model building and so on.
Materials and Method Experiments were carried out in Soil and Water Conservation Research Institute, Chinese Academy of Rainfall Runoff Regulating Field Monitoring Station in Linghou,Wuquan Town, Yangling District, Shaanxi Province from May,2009 to July,2009.
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