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Online since: June 2014
Authors: Chuan Jiang Wang, Xiu Juan Sun, Jian Wu
Where, ( i=1,2,3) and ( j=1,2) mean the torsion angles of clasp arm and stretching arm of the rescue system, and (i=1,2,3) and (j=1,2) mean the common perpendiculars, ( i=1,2,3) and (j=1,2)are the rods’ space-between, and the ( i=1,2,3) and (j=1,2) are rotation angles of the rescue system.
According to Fig.4 and table 1 and 2, we can obtain the matrices Ai(i=1,2,3) and A′j(j=1,2) of the system, just shown as formula (1) and (2) [7]
(1) (2) where i = 1,2,3 and j = 1,2, so we get the following forward kinematical matrices of the clasp arm
References [1] J.C.
Zhang: Advanced Materials Research, Vol.479-481(2012), p.2361
Online since: November 2013
Authors: Seong Ho Song, Ho Chan Kim, Dong Eui Chang
Let be a 1 × (n − 1) matrix defined by which is a submatrix of the matrix C in (3).
Choose any (n − 1) × 1 matrix (8) which is a submatrix of the matrix L in (10) and is Hurwitz, which is possible since is observable; see [9] for definition of observability.
Then, there are two (n – 1) × (n – 1) symmetric positive definite matrices and such that (9) Let be an n × n block-diagonal matrix defined by where is to be determined.
References [1] J.
Control, Vol.17, (1973),pp.471–479
Online since: March 2007
Authors: J.P. Tu, X.Y. Tao, X.B. Zhang, W.M. Zhu, Y.W. Wang, F. Liu, L. Zhang, S.S. Cao, C.Y. Min
Zhang 1, b , W.
Zhu 1,a , Y.
Liu 1 , J.P.
Tu 1 , L.
[5] Ahmadpour A., and Do D.D., "The preparation of active carbons from coal by chemical and physical activation" Carbon Vol. 34, pp. 471-479, 1996
Online since: September 2016
Authors: Wojciech Burian, Marek Rotkegel, Jan Szymala, Mariusz Magier
Fig. 1.
Performing the boring out and concrete sample Table 1.
Results of mechanical tests of the concrete samples Material Number of sample Compressive strength fc (MPa) Average compressive strength fca (MPa) Density ρn (g/cm3) Average density ρna (g/cm3) concrete 1/1 37,9 39,1 2,249 2,282 1/2 28,9 2,295 1/3 45,2 2,324 1/4 42,2 2,234 1/5 41,4 2,310 Dynamic tests were conducted on 26 June and 18 September of 2015 year on the training ground of the Military Institute of Armament Technology in Zielonka near Warsaw.
References [1] E.K.
Yavuza, Experimental Investigations on Aluminum Shaped Charge Liners, 12th Hypervelocity Impact Symposium, Procedia Engineering (2013) 58, 479 – 486
Online since: October 2014
Authors: Zhen Guo Shang, Zhong Chao Ma, Zhen Sheng Sun
Finite Element Analysis of Large-Size Yaw Bearings with Supporting Structure in Wind Turbine Zhenguo Shang 1, a, Zhongchao Ma 2,b and Zhensheng Sun 2,c 1 School of Mechanical Engineering, Da Lian Ocean University, Dalian, Liaoning, 116023, China 2Wafangdian Bearing Group Corp.
FE modeling of the wind turbine yaw bearing A single-row four contact-point ball bearing is used in a 3MW wind turbine to connect bedframe with tower top as illustrated in Fig. 1.
The frame of the yaw bearing is shown in Fig. 2. and main parameters are listed in Table 1.
The maximum von Mises stress in Inner ring is 479.87MPa, and the maximum von Mises stress in Outer ring is 413.87MPa.
References [1] Smolnicki, T.: Physical Aspects of Coherence of Large-Size Slewing Bearings and Deformable Supporting Structures, Oficyna Wyd.
Online since: May 2014
Authors: Renáta Monostori, Illés Dudás
It used to be the reason of the reoperation [1].
Fig. 1 DEA type CMM Fig 2.
Table 1 includes the values of the wear.
Definition of the deviations [4] Table 1.
Steps of the analysis 1.
Online since: April 2020
Authors: Lu Xiong Xu, Rey Chue Huang, Chao Fan Xie, Lin Xu, Fu Quan Zhang
The process as shown in Fig. 1.
References [1] A.
A, 906(1–2) (2001) 399-416
A, 1092(1) (2005) 2-16
Eng. 5 (2011) 479-486.
Online since: June 2010
Authors: Takeshi Ohgai, Akio Kagawa, Keizo Takao, Keisuke Hashiguchi, Takao Morimura
At -0.6 V, the filling time is around 300 s and the deposition rate is estimated to be about 20 nm s-1, while the filling time is close to 30 s at -1.0 V and the deposition rate is estimated to be around 200 nm s-1.
Figure 1 Effect of cathode potential on the time-dependence of cathodic current during electrodeposition of Cu and Co nanowires.
Typical deposition rates of Cu and Co were roughly 20 nm s-1 (at -0.6 V) and 200 nm s-1 (at -1.0 V).
References [1] C.
Electrochem. 35, 479 (2005)
Online since: February 2016
Authors: Alexander S. Ogorodnikov, M.V. Troshin
Introduction In the study we used two numerical methods for modelling of a material phase modification process: a method of an effective heat capacity and a method of a mobile grid computing using Stefan boundary condition [1].
The numerical solution was made using Comsol Multiphysics software package (Fig.1, 2).
Fig. 1.
References [1] J.
Heat Mass Transf., 46 (2010) 479-483
Online since: May 2012
Authors: Jun E Liu, Ren Dong Teng, Yue Chong Wang
Research of Maintenance Decision-making about Existing Building Structure Based on the Life-cycle Cost Theory Jun’e Liu 1, a, Yuechong Wang 2,b and Rendong Teng 3,c 1School of information .Beijing Wuzi University, Beijing101149 2School of Economics Management, Hebei University of Engineering, Handan056038 3Hebei Building Research Technology Co.
Concrete structure performance degradation curve as shown in Fig.1 , for the safety performance or the usability of the structure, lower than the minimum requirement for performance means the structure life terminates, namely T0.The safety performance of the structure can use 0.8as the minimum requirements for structural reliability index [2].
During the research, life cycle cost of existing building structure is shown as follows: (1) LCC: The life cycle cost of building structure. : The life cycle detection cost. : The life cycle routine maintenance. : The life cycle maintenance cost. : Failure Costs Identifying research cycle.
Reference [1] Jianfei Shen, Wenquan Zhang.
Chinese Journal of Management Science.2005,10(13),475-479 [3] Shangchun Zhao, Guofan Zhao, Jinxin Gong.
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