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Acoustic emission (AE) is defined as the transient elastic wave generation due to a rapid release of strain energy within or on the surface of a material.
Qu: Journal of Sound and Vibration Vol. 234(2000), p. 135–148 [2] K.
Randall: Journal of Vibration and Acoustic Vol. 124(2002), p. 165–171 [11] H.
Zheng: Journal of Mechanical Science and Technology Vol. 25(2011), p. 2731–2740 [12] H.Y.
McFadden: Journal of Sound and Vibration Vol. 192(1996), p. 927–939 [16] J.

Journal of Building Structures. 1996(8):2~9, (in Chinese); [2] Zhong Shantong, Liu Dalin.
Journal of Harbin University of Civil Engineering and Architecture, 2002(2):p12~19, (in Chinese); [3] Cheng Shaoge, Liu Jingwei.
Building science. 1998(5):8~13, (in Chinese); [4] Jiang Lixue, Hu Shaolong.
Journal of Building Structures, 2003(23)03:80~84, (in Chinese); [7] Xu Peifu, Fu Xueyi.
China Civil Engineering Journal, 2005(09):53~61, (in Chinese).

During table tennis teaching, comparative analysis is based on the traditional test to study the effectiveness of teaching and take further measures, this process needs to choose specific objects to have the training in specific time and compare the results before and after testing, the manpower and material resources required is large and it is time-consuming, the article uses the improved Apriori algorithm, uses data mining technology and focus on the widely use of university table tennis teaching, this makes degree of table tennis informationalization gradually be strengthened[3,4].
Heilongjiang Science and Technology Information, 2011(10):49-51
Neijiang Science and Technology, 2009(9):77-78 [3] Song Yuqing, Zhu Yuquan, Sun Zhihui.
Journal of Software, 2011,14 (9) :1586-1592
Computer Science, 2010, (4):54-57

Especially, CNTs filled with various materials are of great interest in materials science and technology because their interesting structures can provide several possible applications, e.g. as nano-catalysts, nano-magnetic recording media, one-dimensional nano-junction, superconductors, etc [6].
Though a lot of researches have been performed, the structural properties of materials encapsulated in CNTs are still not very clear.
Among these new functional materials, alkali metal intercalations, in particular, have been actively investigated with a rapid progress.
Previous works have shown the encapsulation and the crystallization behavior of materials inside CNTs [5,12,40].
Green: Nanostructured materials and nanotechnology edited by H.S.

Now, some kinds of artificial materials have been like this “multi-function”. 2.2.
It has developed a wide range of building materials, integration of photovoltaic products and components which can be replaced by photovoltaic roof, windows, sun shadings, security fence and wall et al.
The whole structure is built from recycled materials and will be 100% energy self-sufficient by using photovoltaic cells. 5.
Kloth, et al, Bionic Photovoltaic Panels Bio-Inspired by Green Leaves, Journal of Bionic Engineering. 7(2010)284-293
Multifunctional surface structures of plants: An inspiration for biomimetics, Progress in Materials Science. 54(2009)137–178 [13] Lv ai-min, Climate-responsive building-continental climate ecological strategy, Tongji University publication, ShangHai, 2003

Motivation and Tasks In order to exploit the full potential of lightweight structures there is an obvious trend in joining different materials, such as joining metal with CFRP structures.
Especially for advanced aircrafts it became a common procedure to insert hybrid materials, such as CARALL, which comprise good mechanical properties and low weight.
These forces cause particle deflection acting as sources of ultrasonic waves in the material [8].
Holzleitner, An overview of the polymer-to-metal direct-adhesion hybrid technologies for load-bearing automotive components, Journal of Materials Processing Technology 197 (2008) 363–373
Meyendorf, Thermographic Materials Characterization, in Nondestructive Materials Characterization (Vol. 67), Springer, Berlin-Heidelberg, 2004, pp. 246-285.

Hence, finding a simple, direct and effective way to select raw materials and construction technologies is one of the key steps to ensure the durability of concrete structure.
During the early stage of concrete pouring, the corrosion inhibitor is added to the mixing materials as the additional agent.
Meanwhile, it is necessary to strictly restrict the chloride level in the raw materials of concrete (such as the sea sand).
Acknowledgments Project supported by the National Natural Science Foundation of China (Grant No. 51078190) and Zhejiang Provincial Natural Science Foundation of China (Grant No.
Journal of Wuhan University of Technology, 2008, 30(3): 70-73(in Chinese)

Study of Shear Constitutive Model for Schistose Rock Mass Shang Ge Liu1,a, Hua Xu2,b, Jian Liu1,c and Xiao Tao1,d 1State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China 2Sui-Yue Expressway Management Office of Hubei Province, Wuhan 430050, China alsg00@163.com, bxuhuajyq@163.com, cjliu@whrsm.ac.cn, ctaoxiao001@163.com Keywords: Schistose structure, Shear test, Constitutive model, Exponential function Abstract.
The model is in the form of piecewise exponential function and its advantages are as follows: Piecewise function can reasonably describe the nonlinear pre-peak shear hardening and post-peak shear softening characteristics; Regard peak strength, peak displacement and residual strength as critical points, so it can accurately describe the strength characteristics of the material; The fitting degree is high with direct shear tests both at dry and water-saturated states; Only one parameter value is needed to obtain by fitting experimental curves while others are convenient to determine.
The advantages of the model are as follows: piecewise function can reasonably describe the nonlinear pre-peak shear hardening characteristic and post-peak shear softening characteristic; Regard peak strength, peak displacement and residual strength as critical points, it can accurately describe the strength characteristics of the material; It has high fitting degree with direct shear tests curves both at dry and saturated states; Only one parameter value is needed to obtain by fitting experimental curves while others are convenient to determine, and model expressions are simple and easy to caculate, all of those are benefit to applications in engineering practice.
Hungr: Canada Geotechnical Journal.Vol.115.(1978),p.239

Seven sets of particles, three in spherical shape, two in cylindrical shape and two in irregular shape, are used as bed material by considering bed weights from 500 g to 2000 g and blade overlap angles 18° for air velocities up to approximately 3.5 m/s and blade inclination of 10°.
Paulose, “Hydrodynamic Study of Swirling Fluidized Bed and The Role of Distributor”, Ph.D. thesis, School of Eng., Cochin University of Science and Technology, Kerala, India (2006)
R., “Experimental Studies on a Swirling Fluidized Bed with Annular Distributor”, Journal of Applied Sciences, 11, pp. 1980-1986 (2011)

Introduction CdTe is one of the suitable materials for the photovoltaic application because of its optimum band gap of 1.5 eV for solar spectrum and its direct band gap yielding high optical absorption coefficient.
Materials Science Letters, 22(2003)25-33
Sa.K and Mangalaraj.D, "Structural and optical properties of Hot wall deposited CdSe films", Solar Energy Materials and Solar Cells Vol. 76(2003)347 - 354
Lawrence 'Characterization of electrochemical photovoltaic cells' J. of materials research Vol.6 No.6 (1991) 112-115
materials science Vol. 18, pp 3131-3134