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Materials and methods Figure 1 shows the block diagram of the RC system for an agricultural robot.
Journal of Agricultural Mechanization Research, No.6(2009), p. 62-64, 68.
Journal of Hunan Agricultural University (Natural Sciences) , Vol. 38(2012), p. 441-445.
Journal of Shandong University of Technolo gy(Sci & Tech), Vol. 19(2005), p. 27-31.

Material properties of cable member: elastic modulus is 1.85×105MPa, density is 7.85×103kg/m3, tensile strength is 1860MPa, where design value may takes 40%, 744MPa.
Material properties of strut element: elastic modulus is 2.06×105MPa, density is 7.85×103kg/m3, yield strength is 235MPa.
Vol.21 (1999), p. 864 [2] Gu M, Xu Y L, Chen L Z, Xiang H F. in: Journal of Wind Engineering and Industrial Aerodynamics.
Vol.80 (1999), p. 383 [3] Minh N N, Miyata T, Yamada H, Sanada Y. in: Journal of Wind Engineering and Industrial Aerodynamics.
Vol.83 (1999), p. 301 [4] Yong Guo, Bingnan Sun, Yin Ye. in: China Civil Engineering Journal.

References [1] Li Wenfeng, Wu Zhenyu, Chen Dingfang: Computers & Industrial Engineering Vol. 46 (2004), p. 267-273 [2] Jianjiang Zeng, Wenliang Chen, Qiuling Ding: Journal of Materials Processing Technology Vol. 139 (2003), p. 229-232 [3] Liu Wei-wei, Zhou Lai-shui, Zhuang Hai-jun: Journal of South China University of Technology (Natural Science Edition) Vol. 32 (2004), p. 29-35 [4] Fang Cuihao, Peng Wei, Ye Xiuzi: Journal of Computer-aided design & Computer graphics Vol. 17 (2005), p. 879-888 [5] R.

For this purpose, the impact of structure on the strength is approached from basic deformation of material.
The compressive strength of concrete layer of the material itself and compressed area, as shown by the equation: (1) It is clear that the reduction ratio of compressive strength of the entire concrete is dependent on the ratio of the ratio of the area of this structure over the original structure, i.e.: (2) In case of structure of five Φ10 root system lead holes and exchange holes per square meter, the reduction ratio of strength calculated with the above equation is about 4%.The relationship between reduction ratio of strength and quantities of exchange holes is shown in Fig.2.In case of five holes, the impact of bore diameter on reduction ratio of strength is shown in Fig. 3.
He,J.S.Xie: Journal of Anhui Agricultural Sciences.
(In Chinaese) [5] Z.M.Liu, J.Z.Li: Chinese Journal of Underground Space and Engineering.Vol. 1(2005),p.1026.
(In Chinaese) [6] J.C.Feng, J.H.Wang: Journal of East China Jiaotong University.Vol.20(2003),p.42.

Δn is an important parameter in liquid crystal material.
The size of the pitch can be controlled by adding a chiral material, such as the CB15.
References [1] Berreman D.W: Journal Of The Optical Society Of America.
Vol.62(1972), p.502 [2] Berreman D.W: Journal Of The Optical Society Of America.
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Analysis on Crack Propagation Mechanism of Single Crystal Copper by FEAt Method Ge Li, Qinglong Zhang, Ming Chen, Linyong Zhou Inner Mongolia University of Science and Technology, Baotou, 014010, China ligeab@imust.cn Key words: Single crystal copper, Crack propagation mechanism, FEAt method Abstract.
Introduction The fracture process of metal material was a typical multi-scale phenomenon which throughout the macro, meso, micro-scale [1].
[4] Y.F.Guo and C.Y.Wang: Journal of Iron, Vol.14 (2002) No.3, p.60.
(in Chinese) [5] X.F.Wang, G.M.Zhou and C.W.Zhou: Journal of Nanjing University of Aeronautics & Astronautics, Vol.37 (2005) No.6, p.730.
(in Chinese) [6] J.L.Zuo, D.S.Feng and N.Li: Chinese Journal of Rare Metals, Vol.34 (2010) No.5, p.726.

Computational Method The program Materials Studio DMol3 from Accelrys is used in this study.
Sealy, The problem with platinum, Materials Today, 11 (2008) 65-68
Lee, Oxygen reduction behavior with silver alloy catalyst in alkaline media, Materials Chemistry and Physics, 45 (1996) 238-242
Bellino, Water-graphene environment modulated by coupled nanopore interplay, Materials Chemistry and Physics, 232 (2019) 382-386
Zhu, DFT Study on Intermetallic Pd–Cu Alloy with Cover Layer Pd as Efficient Catalyst for Oxygen Reduction Reaction, Materials, 11 (2018) 1 - 11

Ultra high temperature ceramic matrix composites (UHTCC) are being considered as the most promising materials for leading edge and nose cap of hypersonic spacecrafts, reusable space vehicles and so on.
Introduction High speed flying vehicles, such as reusable launch vehicle (RLV), need sharp nose and leading edge to guarantee optimum aerodynamic shape, and this exerts nose materials to withstand high tempera- ture (over 3000°C) and strong oxidation, thus ultra-high temperature material must be chosen to satisfy the requirements.
Experimental Raw material.
Table 1 Recession rate and mass loss rate of C/SiC-TaC composites TaC (vol%) Recession Rate (mm/s) Mass loss Rate (g/s) 0 0.062 0.0166 10 0.06 0.026 20 0.042 0.0136 40 0.04 0.0159 60 0.026 0.0116 80 0.053 0.0138 100 0.042 0.0151 Fig. 3 Surface appearance of C/SiC (a) and C/SiC-TaC (b) composites after ablation After ablation, the surface appearance of C/SiC and C/SiC-TaC composites shows melting trace at high temperature (Fig. 3), e.g., wax-like materials in the surface.
Sayir: Journal of Materials Science.

Acknowledgments: The project is supported by National Science Fund for Distinguished Young Scholars(Grant No.50825403)and Science Fund for Creative Research Groups of the National Natural Science Foundation of China(No. 51021001).
International Journal of Impact Engineering, 2001, 25: 661-681
Chinese Journal of Solid Mehcanics, 2004, 17(2): 140-149
Material dynamics[M].
[8] ZHOU Ze-ping, WANG Ming-yang, FEG Shu-fang etc, Deformation and Failure of a Reinforced Beam Under Low Velocity Impact[J], Journal of Vibration and Shock, 2007,26(5);99-103.

The initial parameters and value ranges of hinge mechanism Optimization parameters L1 (mm) L2 (mm) L3 (mm) A (°) t (mm) D (mm) initial values 5.5 3 5.5 90 1 8 value ranges [4,7] [2.4,3.6] [4,7] [90,120] [0.8,1.2] [6,10] Furthermore, hinge material is 65Mn spring steels, and its Young's modulus E and poisson's ratio μ and density ρ are 200GPa, 0.3 and 7850Kg/m3, respectively.
Acknowledgments This work was jointly supported by the National Science Foundation of China (51175221, 51305162), and the Department of Science and Technology of Jilin Province (20130522155JH).
Journal of Tsinghua University (Sci & Tech) 42.2 (2002): 172-174.
Journal of University of Science and Technology Beijing 30.2 (2008): 189-192.
Journal of Micromechanics and Microengineering 20.8 (2010): 085014