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Introduction Left-hand materials (LHM) or negative refractive medium is a new type of artificial electromagnetic materials developed in recent years [1].
Because of the different dielectric constants and the permeability of left-hand materials(LHM) are related to the parameters of S11 and S21.
Hung: Submitted to Journal of MicroWaves (2004)
Wu: Submitted to Chinese Journal of Radio Science (2006)
Lv: Submitted to Journal of Micro Waves (2007)

Conventional metal material has smaller damping and less energy consumption,therefore constructional elements which are made of these material will radiate strong noise due to the vibration force.It will solve the problem if use high molecular material or the damping property of metal material,because damping materials can reduce much more noise than the general materials in the same forces.C.L.
Luo[14] invented a kind of metal plastic composite materials including 45# steel and nylon 66.Experiments showed that its amplitude and natural frequency dropped and damping ratio increased in the same order modal.In his book,M.
Zhang: Topology Optimization Design of Constrained Layer Damping Plate-Cavity System Considering Vibro-acoustic Coupling.Journal of Vibration, Measurement & Diagnosis, (2011) No.5 (In Chinese) [8] Takaaki Hase, Nobuhiko Yamasaki and Tsutomu Ooishi: Numerical Simulation for Fan Broadband Noise Prediction.Journal of Thermal Science, Vol. 20 (2011) No.1, p.58 [9] Z.
Pang: Modal Testing and Analysis of Vibration Reduction Behavior of Metal-plastic Compound Materials.Noise and Vibration Control, (2010) No.2 (In Chinese) [15] M.
Qiu: Position optimization for secondary speaker and error sensor of duct active noise control system.Journal of Tsinghua University(Science and Technology), (2011) No.3 (In Chinese) [22] Q.Z.

Progress in Materials Science，2001，46: 559-632 [2] Ashhy M F, Evans A G, Fleck N A, et al.
The deformation of foamed elastic materials [J] .
Journal of Applied Polymer Science, 1959, 1 (1): 107-113
The mechanics of three-dimentional cellular materials [J].
Journal of Mechanical strength. 2009，31(4)：625-628

The thermal treatment improved the magnetic properties of Fe-3.5Si SMC materials.
Processing conditions of Fe-Si SMCs materials strongly influence their final magnetic properties.
Janghorban: Journal of Magnetism and Magnetic Materials Vol.322(2010), p.808-813
[7] YouGuang Guo, Jian Guo Zhu, Zhi Wei Lin, Jin Jiang Zhong, Hai Yan Lu and Shuhong Wang: Journal of Magnetism and Magnetic Materials Vol.312 (2007) , p.458–463
Mikhnevich: Inorganic Materials Vol.43(7)(2007), p.711-713.

Materials Science and Engineering A, 2001, 302: 37-45
Materials Science Forum, 2003, 419-422(1): 57-66
Frontier Materials Science of China, 2008, 2(1): 1-8
Journal of Materials Science, 2008, 43: 6952-6959
Materials Science and Engineering A, 2006, 428: 295-300

Alexandrov: Progress in Materials Science, Vol. 45 (2000), p. 103
Langdon: Progress in Materials Science, Vol. 51 (2006), p. 881
Cao, Materials Science and Engineering: R, Vol. 63 (2009), p. 127
Ma: Materials Science and Engineering R, Vol. 29 (2000), p. 49
Suzuki : Materials Science and Eng.

References [1] Z Pater: Journal of Materials Processing Technology.
[6] L Hua, D S Qian, L B Pan: Journal of Materials Processing Technology.
[7] L Hua, Z Z Zhao: Journal of Materials Processing Technology.
Hua: Journal of Materials Processing Technology.
[11] Q X Xia, S W Xie, Y L Huo: Journal of Materials Processing Technology.

Liu: submitted to Journal of Membrane Science (2011) [2] A.
Capannrlli: submitted to Journal of Membrane Science (1991) [3] S.C.
Ratana: submitted to Journal of Membrane Science (2011) [8] X.T.
Xiao: submitted to Journal of Membrane Science (2010) [10] S.J.
Lee: submitted to Journal of Membrane Science (2009) [11] L.

Bending properties of four-layer biaxial weft knitted fabric reinforced composite materials Liangsen Liu, Yexiong Qi, Jialu Li Composites Research Institute of Tianjin Polytechnic University & Tianjin and Education Ministry Key Laboratory of Advanced Textile Composite Materials, Tianjin 300160, China email:qi_ye_xiong@163.com, fhcls@tjpu.edu.cn Keywords: Four-layer biaxial weft knitted fabric, composite materials, bending strength, bending modulus Abstract.
The bending properties of the FBWK fabric reinforced composite materials with different fiber volume fraction have been investigated.
The bending modulus and bending strength of FBWK reinforced composite materials have a great relationship with fiber volume fraction.
Within a certain range, the bending modulus and bending strength of FBWK reinforced composite materials increase with fiber volume fraction increases.
Sci. & Tech., 60(2000), p33 [4] Liangsen Liu, et al: Journal of Tianjin Polytechnic University, 20 (2001), p. 21

There are no grinding forces formulas can be applied to some different workpiece materials and grinding wheels, because grinding force changes in various grinding parameters.
Malkin: Journal of Manufacturing Science and Engineering (2001), p. 12 chip formation proces for grinding experiment and actual processing.
Acknowledg The authors would like to acknowledge the support of No. 50775032 by National Natural Science Foundation of China.
Gindy: submitted to Journal of Materials Processing Technology (2008 ), p. 420 [4] J.Y.
Chen: submitted to Journal of Materials Processing Technology (2008) H.C.