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Acknowledgements This work was supported by the National Natural Science Foundation of China (Project No. 50505032), and Tianjin Science & Technology Commission (Project No. 10ZCKFGX03200).
Ho: Materials Chemistry and Physics Vol. 40 (1995), p. 147-161 [2] Junlan Li, Dawei Zhang and Xingyu Zhao: Optics and Precision Engineering Vol. 04 (2010), p. 965-972 [3] Jun Zhu, Shixi Wang and Yi Su: Journal of Image and Graphics Vol. 14 (2009), p. 14-18 [4] OTSU, N.: Systems, Man and Cybernetics Vol. 9 (1979), p. 62-66 [5] J.

Materials and Methods Bunching onion seedling with 4 leaves was transplanted in sands in Ø 22cm plastic pot at January 16, 2006, 4 plants in 1 pot. 200 mL Hoagland's solution (pH 6.5) was added every 2 days each pot. 4 Ca2+ levels (0, 40, 80 and 160 mg/L) treatments began at February 14.
Beijing Agricultural Sciences,(2), 14~21.
Jiangsu Journal of Agricultural Sciences, 23(1), 39-45.

Microstructure of Pyrolytic Carbon Matrix in Carbon/Carbon Composites after Graphitization Wan-Chang Sun1, He-Jun Li2 , Shou-Yang Zhang2 and Yong Huang1 1 State Key Laboratory of New Ceramics and Fine Processing, Dept. of Materials Science & Engineering, Tsinghua University, Beijing 100084, China 2 Laboratory of Super High Temperature Composites, Northwestern Polytechnical University, Xi'an 710072, China Keywords: C/C composites, Rapid densification, Graphitization Abstract.
Acknowledgement This work was supported by the National Science Foundation of China (NFSC) (Grant No. 50072019).
Zhang: Chinese Journal of Aeronautics.

A Nonlinear Piezoelectric Energy Harvester from the Vibration of Magnetic Levitation Zuyao Wang School of Sciences, Zhejiang University of Science and Technology, Hangzhou Zhejiang 310023, P.R.
Due to the high energy density and strong magneto-mechanical coup ling in magnetostrictive material, MLC has the potential to generate large power outputs.
Holmes, Architectures for vibration-driven micropower generators, Journal of Microelectro mechanical Systems 13 (2004) 429–440

Stress Characteristics on the Section of Composite Beam Steel-concrete composite beam is different from ordinary beam which is formed of single material in stress performance.
Journal of highway and transportation research and development, 2004, 21(8): 38-41.
Elsevier Science Publishers B.V., 1988
Beijing: Science Press, 2005.

Plant material Chloranthus fortunei were collected from Jujiang country, Jiangxi Province, China in July of 2012 and authenticated by Professor Q.
Acknowledgments This work was supported by the National Science Foundation of China (No.21262019).
A Dictionary of the Traditional Chinese Medicines, Shanghai:Shanghai Science and Technology Press , 1976, pp652-653
Li, “Studies on the chemical constituents in the essential oil fromChloranthus henryi” Journal of Jiangxi college of Traditional Chinese Medicine, 19(2007)63-66 [3] C.

There is a strong demand for more materials physical data for various alloys in order to assist process and product design with numerical simulation.
Beladi, Dynamic recrystallization in AZ31 magnesium alloy, Materials Science and Engineering A, vol. 456, (2007), pp. 52-57
Rao, Processing maps for hot deformation of rolled AZ31 magnesium alloy plate: Anisotropy of hot workability, Materials Science and Engineering A, Vol.487, Nos.1-2, (2008), pp.316-327
Kainer, Hot workability analysis with processing map and texture characteristics of as-cast TX32 magnesium alloy, Journal of Materials Science, Vol.48, Issue 15, (2013), pp.5236-5246
Luo, Flow Stress Numerical Modeling for Large Strain Deformation in Magnesium, Computer Methods in Materials Science, Vol.10, (2010), No.2. 108-129 [11] Y.

Research on Fault Diagnosis and Application for Rolling Element Bearing Based on Fuzzy Analysis Xiaoguang yu 1, a, Jian liu 1,b 1 School of Mechanical Engineering and Automation, University of Science and Technology Liaoning, Anshan, China, 114051 ayuxiaoguang58@163.com, bliujianpeter2015@yahoo.com.cn Keywords: Rolling Element Bearing; Fault Diagnosis; Variation Signal; Fuzzy Theory Abstract.
After a large number of material and testing data showed that the following parameters could be regarded as characteristic values of time domain diagnoses: l Effective value l Peak value l Kurtosis value l Margin value l Skew value 2.2 Frequency domain parameter extraction [3] [4] In this article, we used following characteristic quantity to describe power spectrum and its changes l Gravity frequency of power spectrum l Power spectrum variance l Mean square frequency The application of fuzzy theory in rolling bearing faults diagnoses 3.1 The theory and model of fuzzy logic faults diagnosis We try to setup fuzzy relation matrix between faults and symptoms before diagnoses.
Its definition is as following: The detailed way of defined membership is to set value to symptom parameter subjectively, which is based on fault level of bearing at every collecting point and past experience and reference material.
References [1] J Mathew and R J Alfredson．The Condition Monitoring of Rolling Element Bearing Using Vibration Analysis．ASME J．Vib Acoust stress Reliab Des，1984，106（12）：447～453 [2] Su Y T，Lin S T．On Initial Fault Detection of a Tapered Roller Bearing．Journal of Sound and Vibration，1992，155（1）：75～84 [3] J．Shiroishi，Bearing Condition Diagnostics via Vibration and Acoustic Emission Measurements．Mechanical Systems and signal Processing，1997，11（5）：639～705 [4] W J Staszewski，K Worden and G R Tomlinson．Time-Frequency analysis in gearbox fault detection using the Wigner-Ville distribution and pattern recognition．Mechanical Systems and Signal Processing，1997，11（5）：673～692

Acknowledgement This research was supported by the National Natural Science Fund of China (Item No. 51175180).The support of the project is gratefully acknowledged.
Applied Mechanics and Materials Vols. 135(2010)pp 122-127
Reid, Analysis of stress concentration around a spheroidal cavity under asymmetric dynamic loading, International Journal of Solids and Structures 48 (2011) 2255–2263.

The process is as follows: By the hypothesis of Miner fatigue damage accumulation formula [3] (2) Where: Z—stages of step stress —life cycle of stress —limit life cycle when only stress is exerted Then according to the fatigue curve of V-belt [3] (3) Where: N — limit life cycle — limit stress with life cycle N —constant related to material and structure of belt The limit life cycle corresponding to obtained on the basis of Eq.3 is put in Eq.2 to get the calculation equation of equivalent stress with constant life cycle (4) On the basis of Eq.4 the step stress accelerated life testing data with
38.889 39.237 39.447 9.6 9.6 9.6 6.8 23.47 7 38.565 38.915 39.266 39.617 39.968 9.6 9.6 8.8 8.8 7.2 24.07 12 38.502 38.848 39.194 39.540 39.887 9.6 9.6 9.6 9.6 34.8 25.34 3 38.609 38.964 39.318 39.673 9.6 9.6 9.6 7.2 23.57 8 38.563 38.914 39.246 39.615 39.966 9.6 9.6 9.6 9.6 8.0 24.20 13 38.629 38.984 39.339 39.695 40.050 9.6 9.6 9.6 9.6 36.0 25.48 4 38.545 38.894 39.244 39.593 9.6 9.6 9.6 9.6 23.68 9 38.637 38.993 39.349 39.705 40.060 9.6 9.6 9.6 9.6 9.6 24.34 14 38.540 38.889 39.237 39.586 39.935 9.6 9.6 9.6 9.6 45.6 25.72 5 38.602 38.956 39.309 39.663 9.6 9.6 9.6 9.6 23.72 10 38.499 38.845 39.191 39.537 39.833 9.6 9.6 9.6 9.6 24.0 24.91 Table 2 Reliable limit stress () and reliability factor of D-section classical V-belt R（%） 50 60 70 80 90 95 99 (MPa) 24.28 24.05 23.81 23.52 23.13 22.80 22.19 1 0.991 0.981 0.969 0.953 0.939 0.914 An Example For a D section classical V-belt drive system, the material
References [1] Y.D.Liu: Chinese Journal of Rubber Industry Vol. 41 (1994) No.2, p.103.
(In Chinese) [2] H.Z.Huang: Reliability Theory and Application of Mechanical Transmission (China Science and Technology Press, P.R.C 1995),p151.