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In fact, traditional SAFT and F-SAFT are required to collect material surface 2-D matrix ultrasonic signal in the two dimensional case.
The two-dimensional matrix signals comprise the acoustic beam scanned by stepping distance of the sample surface in the ultrasonic field, many measuring points at the surface will be received the scattering acoustic field from a point of the internal defects in the material .
Journal of Nanchang Institute of Aeronautical Technology. 2001,15(3):16-18 [4] Quan Wei,G.H.
"Investigation of Ultrasonic Fields of a Transduer Using the Angular Spectrum Method”Journal of Nanjing University(Natural Sciences) Vol.36,No.3 May,2000 [7] René Sicard.

Acknowledgments The authors gratefully acknowledge the support of the NSAF Funding of China Grant No.10876027 and Science and Basic Research Funding of Northwestern Polytechnical University Grant No.JC201106.
Journal of Sound and Vibration, 2004, 275:1113-1126
Journal of Vibration and Shock, 2010, 29(s1): 13-15.
Advanced Materials Research, 2011, 163-167: 2515-2520

Acknowledgements This work was financially supported by the National Natural Science Foundation of China (41072234 and 41272325).
Applied Mechanics and Materials Vol. 353-356 (2013), p. 669-672
Chinese Journal of Rock Mechanics and Engineering Vol. 31 No. 10 (2012), p. 2088-2095
International Journal of Fracture Vol. 65 No. 4 (1994), p. 77-83.

The ECG Data Storage System Design Based on SD Card and Reliability Analysis Yulong Zhu1,a, Yuduo Wang*1,b 1 School of Information and Communication Engineering, Beijing Information Science and Technology University, Beijing 100101, China ayulongzhu@163.com, bwangyuduo@bistu.edu.cn Keywords: Heart rate variability(HRV), BMD101, Fat32, PhysioNet, physiotoolkit.
References [1] Malhi, K.; Mukhopadhyay, S.C.; Schnepper, J.; Haefke, M.; Ewald, H.; , "A Zigbee-Based Wearable Physiological Parameters Monitoring System," Sensors Journal, IEEE , vol.12, no.3, pp.423-430, March 2012 [2] NeuroSky, Inc, 2011-BMD100 Module Brochure [3] SD Group, SD Memory Card Specifications Part 1 PHYSICAL LAYER SPECIFICATION Version 1.01, https://www.sdcard .org/, 2001
Clem: submitted to Journal of Materials Research (2003) [6] Kleiger RE, Miller JP, Bigger JT, Moss AJ, and the Multicenter Post-Infarction Research Group.

Materials and method Description of Study Area.
“Sensitivity of hydrological variables in the arctic watershed, Coppermine River, NWT, Canada due to hypothetical climate change,” in Journal of Environmental Hydrology, vol.13,22,2005
Liem&N.K.Loi, “Assessing water discharge in BE river, Vietnam using SWAT model”, International Symposium on Geoinformatics for Spatial Infrastructure Development in Earth and Allied Sciences,pp. 230-235,2012 [7] Krause, P., Comparison of different efficiency criteria for hydro logical model assessment.
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High altitude in the region, low temperature, low pressure, low oxygen partial pressure, according to the material, oxygen partial pressure of 21.15 kpa sea region, oxygen partial pressure tunnel site area only 12.64 kpa, the temperature is low, from October to may of next year as the ice and snow for about a year, month average temperature is below zero, are harsh environmental conditions, such as CO, dust when combined with the construction greatly influence the construction progress, a serious threat to health technical personnel.
(3) after pouring, ensure the temperature in the tunnel, in the concrete surface heat preservation material, and create favorable conditions for concrete curing, ensure the intensity of final set. 4.3 Tunnel construction Oxygen technology Tunnel of high altitude, thin air, oxygen is serious, poor environmental conditions, combined with the construction of dust, harmful gas concentration is high, the air inside hole than thin air hole, a lower oxygen content, construction personnel in such conditions bear the heavy manual labor, threats to their health and life security, so in high altitude oxygen technology must be used in tunnel construction
References: [1]Lv Kang-cheng, Ma Chao-chao, Ji Zhe, Analysis on stripe insulating layer for ring drain pipe of tunnel in cold region and its temperature field.Chinese Journal of Underground Space and Engineering.2013,4:304-308 [2]Lv Kang-cheng, Ji Zhe, Ma Chaochao, Cause and Prevention for Tunnel Lining Crack in Cold Region.HIGHWAY,2012,10:196-199 [3]Yang An-jie, Tunnel Wet Concrete-shot Technology in Permafrost Region[J],China Railway Science.2004.2:141-144 [4] Lai Yuan-ming，Nonlinear analyses for the couple problem of temperature, seepage and stress fields in cold region tunnels[J], Chinese Journal of Geotechnical Engineering，1999,5:529-533 [5] Provincial highway S215 line kangding waze to jiulong highway rebuilding project chicken ugly mountain tunnel design specification, CCCC second highway consultants Co., Ltd.

Materials and methods The experiment was conducted on two existing flat roofs belong to Malaysia Agricultural Research and Development (MARDI) Serdang, Selangor in Horticulture Research Centre, named as Roof 1 and Roof 2.
Journal of Hydrology, 414-415, 148-161
American Journal of Environmental Sciences, 5(1), 7-15.

Elsevier Science Limited (2008)
[4] Bin Xia and Da-Wen Sun: Computers and Electronics in Agriculture 34 (2002) p.5 [5] Filippo Gavelli, Edward Bullister and Harri Kytomaa: Journal of Hazardous Materials 159 (2008) p.158 [6] M.K.
Liu: Applied Thermal Engineering 28 (2008) p.651 [11] Tord Karlsson and Lennart Vamling: International Journal of Refrigeration 28 (2005) p.706

For the actual manufacture of materials, if the contact surface friction coefficient μ = 0.06-0.09, can play a significant role in reducing the shear.
Huazhong University of Science and Technology Press, Wuhan, China,1993.
(In Chinese) [4] Mokha A S,Amin N Constantinou M C, Zayas V,Sesmic isolation retrofit of large historic buildings[J].Journal of structure engineering,ASCE,1996,122(3):298-308
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It is prone to compositively integrate on one chip for the photonic crystal slab (PCS) and conventional dielectric waveguide which can use the same material to couple together.
The background material is Si and the red region is air here.
Acknowledgement This work was supported by the National Nature and Science Foundation Grant 50875015.
Baets, IEEE Journal of Quantum Electronics 38, 949-955 (2002) [4] W.
Marti, IEEE Journal of Quantum Electronics 40, 541-550 (2004) [9] Ph.