Search results

This result will play a theoretical guidance for the research of waveguide containing left-handed materials.
It was until the split ring resonator (SRR) medium introduced by Pendry et al. [3] that gave the opportunity to make a material with negative permeability, from which a left-handed medium can be constructed, as Smith et al. demonstrate [4].Since then, “left-handed”materials becomes the hot subject both in experimental and theoretical efforts, as it promises applications on optics, quantum optics, and electromagnetism. [5-8] Compared to traditional medium waveguide, sandwich structured materials made up of usual medium of coat- and substrate- layers and“left-handed”materials of central-layer show peculiar properties in plane guided wave, such as the absence of the fundamental TE modes, mode double degeneracy, and sign varying energy flux.
Acknowledgment This work was financially supported by the Natural Science Foundation of China under Project number 50061001and 50661001; supported by the Science Foundation of Guangxi Province under Project number 0991026, 0832029, and 0639004.
Observation of the inverse Doppler effect in negative-index materials at optical frequencies[J]. 2011, 5(4): 239-245
Journal of Physics: Condensed Matter. 1998, 10(22): 4785

It is one of the important materials which relates to motor energy conversion and service life.
Japanese Journal of Applied Physics. 1987, 26(1):197-199
Wear Properties and Life Prediction of Friction Materials for Ultrasonic Motors.
A Wear Evaluation Chart if Friction Materials Used for Ultrasonic Motors.
Wear and dynamic properties of piezoelectric ultrasonic motor with frictional materials coated stator, Materials Chemistry and Physics, 2005, 90:391~395 [7] Ding Qingjun.

Material and Methods Preparation of Raw Materials.
The raw materials were washed to remove dust and particles and cut into smaller pieces.
Then, the raw materials were oven dried at 80˚C overnight.
Materials, 7, (2014) 6982–6999
Journal of Residuals Science & Technology, 12(1), (2015) 9-16.

This reproductive process exploits the physical phenomenon of material erosion of conductive materials by means of electrical discharges.
Acknowledgements This paper is supported by the National Science Foundation of China(50275087).
Wang: submitted to Journal of Magnetism and Magnetic Materials (2006)
LAu: Journal of Material Processing Technology 63 (1997), p. 908
Bleys: Journal of Material Processing Technology 149 (2004), p.347.

Test equipment and specimen In this test, the requirement equipments are:  multi-function experimental rig of Mechanics Materials (shown in Fig. 5), XL2118A type strain comprehensive parameter tester, strain gauge, ruler, vernier caliper, etc.
Fig.5 Multi-function experimental rig of Mechanics Materials Fig.6 The specimen installation Test results The same loading process is repeated three times, and the test results are shown in table 1.
Material Mechanics[M].Beijing: High education publishing house,1992
A new finite element solution for internal force and frequencies analysis of the compressed bar[J].Science technology and engineering, 2009,9(21): 6495-6498
Series calculation method of critical load of compression bar with one end fixed and one end hinged[J].Journal of university of science and technology Liaoning, 2011, 34(4):349-351

Among mechanical characteristics of materials, toughness is one of the effective factors in material performance during loading.
Peleg, "Mechanical interrelation of compressive stress strain relationship of solid foods," Journal of Food Science, vol. 43, pp. 1087-1092, 1978
Kabas, et al., "Drop test simulation of a sample tomato with finite element method," Journal of the Science of Food and Agriculture, vol. 88, pp. 1537-1541, 2008
[16] "Compression test of food materials of convex shape," ASAE, 2008
Mohsenin, Physical Properties of Plant and Animal Materials.

Introduction Though the water jet technology has been widely used in industrial cutting, processing, digging, exploiting and drilling, resurfacing, and materials breaking etc, there is not a clear cognition on the mutual interacting mechanism between water jets and solid materials.
Acknowledgement This work was supported by National Natural Science Foundation of China (No. 50904075), the Major State Basic Research Development Program of China (973 Program) (No. 2010CB226706).
Journal of Shi You DaXue Xuebao, 2002 , 26 (3) : 37-40 [2] Z.Guo, M.Ramulu and M.G.Jenkins.
Journal of the University of Petroleum,1997, 21(4): 18–22
Journal of Hydrodynamics(Ser.B), 2003,15 (2):71-76 [7] Wang Xucheng, Zhen Ming.

Structure design and material selection is the key of weapon design.
Material of the counter-recoil frame should be selected for greater yield strength of materials.
Journal of nanjing university of science and technology,2007.1
Journal of ballistics, 2009,21(9)
Journal of nanjing university of science and technology (natural science).2009.33(6).

Songklanakarin Journal of Science and Technology 2007, C29(3): 857–868
International Journal of Advanced and Applied Sciences 2019, 6(9): 71–75
Journal of Engineering Science and Technology 2019, 15(5): 2509 -2521
[15] T.M.G Selva, J.S.G Selva, R.B Prata, Sensing Materials: Diamond-Based Materials.
Materials 2019, 12(15): 2483

In general, candidate address, spare parts, raw material supply costs, transportation costs, initial investment and management costs, the number of the depots are included.
References [1] Liu Haiyan, Li Zhongping, Location Model for Logistics Aviation Overhaul Depot, Journal of Southwest Jiaotong University, no.6 pp. 2-3, June 2000
[2] Zhang Peilin, Wei Qiaoyun, Location Model and Heuristic Algorithm for Logistics Aviation Overhaul Depot, Journal of Traffic and Transportation Engineering, no.7, pp. 65-68, July 2003
[5] Eberhart R.C., Kennedy J., A new optimizer using particle swarm theory, Proc, On 6th International symposium on micromachine and human science, Piscataway, NJ, IEEE Press, Dec. 1995, pp. 39-43
[7] Liu Fei, Gu Hongqiang and Guo Li, Application of Test Node Optimization Based on GAPSO, Journal of Projectiles, Rockets, Missiles and Guidance, vol 30, no 2, pp. 253-255, April 2011