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Based on material mechanics, by integral operation, approximate formula is deduced as follows
International Journal of Mechanical Sciences, V(43), Issue(10), 2001(10): 2281-2295 [7].Kim S C, Chung S C .

The objective function of network optimal layout here can be presented as: (2) Whereis the pipeline length between i and j (m).The simplified objective function not only considers the flux change, but also eliminates the effects of price and specifications of the pipes, which makes the computation easier and simpler.is the number of nodes in the network system;is the pipe price connecting i and j pipeline section, which can be decided by the empirical cost formula of unit length pipeline: (3) Where a b are constant values, which can be obtained by the least square method with regressive analysis according to the commercial pipe diameters and its prices;Since (4) For a certain pipe network with the same pipe material, its economic velocity and a,b are same.
(University of Science and Technology of China Press, 1990) [2] S.
Journal of Hydraulic Engineering. 14-18 (2001), 6 [10] G.

Ultrasonic distance measurement principle is very simple,firstly ultrasonic transducer(ultrasonic wave launch and receiving device) launches ultrasonic,when the ultrasonic wave meets the obstace, and has the reflection,The echo signal is transformed by the transducer and received into the electrical signal (signal impulse).We start to time from the ultrasonic wave launch, and stops the time while receiving echo signal, ultrasonic propagation's time may calculate very easily and supposes it is t, Known ultrasonic propagation speed in air and supposes it is v,so we can calculate distance between transducer and obstacle: S=½ vt (1) This article uses the receiving and dispatching integration transducer,Resonance frequency: 35KHz±1.5KHz;Workingvoltage:<1500Vpp;Range finder measuring range:0.3-10m;Half-power angle:5°;Material object as shown in Figure 1[1].
[4]TD Wong LiLang and Yang Li: Journal of Jimei University,Vol.3(1998) No.1,p.19-22
[5]Jiao Bing: Design of ultrasonic liquid level meter based on ARM(MS., Nanjing University of Information Science &Technology, China 2008),p.44

Introduction Garment marking is also called the layout or setting of material, which is a layout diagram of the product design process[1].
Journal of Marine Science and Technology Vol. 09(2004), p. 70

Experimental application of surface reversal method Material and Apparatus.
Yoshihara, Ultrasonically Assisted Grinding for Mirror Surface Finishing of Dies with Electroplated Diamond Tools, International Journal of Precision and Manufacturing, Vol 8 No 2 (2007) 38-43
Fujii, An outlier correction procedure and its application to areal surface data measured by optical instruments, Measurement Science and Technology, 21 (2010) 105105 (11pp) [8] Information on http://www.digitalsurf.fr/en/index.html, assessed on July 15, 2012

References [1]Li Zhaojian, Jiang Yi, Material consumption analysis of room air conditioner manufacturing in China, Heating Ventilating & Air Conditioning, 2007(3)25-26
[3]LIANG Zhen, SHEN Henggen, GUO Jian, Techno-Economic Analysis on Recovery of Condensing Heat in Fossil Fuel Power Plants, Journal of Donghua University(Natural Science), 2009(5)582.

Effects of Information Technology on Rural Economic Development from the Perspective of Smart City Lijun Wang*1 , Pingnan Ruan1 , Shuang Li2 1 School of Economics and Management, Beijing University of Technology, Beijing 100022, China. 2 College of Science, North China University of Technology, Beijing 100144, China.
This indicates that the introduction of information technology factors changes the influence from material and human investment on the economic benefits, and further strengthens the role of human capital.
Journal of Chang An University, 2009, 3, 30-35

Finite element model of slab of the slipway studied The material parameters defined in models are list in Tab.1.
Acknowledgements The work is financially supported by the national natural science foundation of China (No.51309209), and research foundation of Offshore Oil Engineering Co.Ltd.
Journal of Applied Fluid Mechanics,2011,4:77-88.

For the architectural creation, the keys to determine success or not are how to take advantage of the creation resources and environmental conditions creatively, and solve the various dimensions, multi-levels of contradictions which the creation process faced, and make the project achieving better quality and more efficiently services to people 's life from the material, spiritual and artistic aspects.
Extension Engineering[M].Beijing: Science Press,2007,pp.40-45 [2] WANG Keqi.
Discussion on architecture creation’s systemic thinking view[J].Journal of Jilin Institute of Architecture & Civil Engineering，2010（1）, pp.97-100

Concussions The eco-tourism resource is an important material basis for economic and social development, and an important resource to ensure sustainable development.
[2] Qun Du, “An Ana lysis on Legal Components of Ecological Compensation and Main Issues of Ecological Compensation over Natural Resources and Environmental Legislation in PRC”, Modern Law Science, Vol. 27, No. 3, pp. 186-191, 2005
[3] Zhan Liying, Xue Yuegui, “A Preliminary Study on Ecological Compensation Mechanism in Eco-tourism—A Case Study of the Longjing River in Yangshuo”, Journal of Guilin Institute of Tourism, Vo l. 18, No. 2,pp.231-234, 2007.