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The bed contacts with the ground by inflatable anchor, and is made of resin concrete materials which have a good vibration damping capacity, effectively reduce the natural frequencies of the machine tool, have lower linear expansion coefficient compared with cast iron and have a good dimensional stability.
Acknowledgement This study was supported by the Fundamental Research Funds for the Central Universities (N110403007) and Natural Science Foundation of Liaoning Province (201202065).
International Journal of Machine Tools & Manufacture, Vol.39(1999) No. 12, p. 1961 [5] J.
Hsu: International Journal of Machine Tools & Manufacture, Vol. 43(2003) No. 11, p. 1163 [6] J.H.
Choi: International Journal of Machine Tools & Manufacture, Vol.39(1999), p.1087

In searchable materials, in dynamic model, every parameter has been supposed as invariable [1-4].But, variable factor exist actually in many place, which indicate that the veracity in analysis of invariable model should be suspected.
Journal of Terramechanics, 2007,44(1): 81~87
Chinese Journal of Mechanical Engineering, 2002, 38(3):54~58
Journal of Chongqing University. 2010.33(10):25~31
China Academic Journal Electronic Publishing House. 1994,4:4~12

There are many pebble-bed river, dredging pebble can be used as new built material in regulation engineering, which not only greatly reduces the investment of projects, but also eases the supply of stone material and protects the local ecological environment.
References [1] Xiang-fei Yang: Journal of Chongqing Jiaotong University,2010(1):133-137(in Chinese)
[2] Zhi-hou Zhao, Huajun Zhou:Hydro-Science and Engineering,2008(3):58-63(in Chinese)
[3] Hua Fu，Yaochang Ma and Shiyi Wang: Journal of Sediment Researc, 2006(12):70-74(in Chinese)
[9] Yan Guo, Zhizhou Zhao, Hua-jun Zhou: Journal of Chongqing Jiaotong University, 2008(2):290-292(in Chinese)

Acknowledgements This work was supported by the National Natural Science Foundation of China (Grant Nos. 11172055).
Journal of Propulsion Technology, 2009, 6: 1001-1012
Journal Of Propulsion Technology,2001
Journal of Aerospace Power, 1000-8055，2004
International Journal of Heat Mass Transfer,2002,45:655-666\””

Construction and Building Materials 25 (2011) 47–53 [6] A.B.
Journal of Food Science, 272 (2007) 77-86
[16] American Society for Testing and Materials.
[18] American Society for Testing and Materials.
Construction and Building Materials, 21(6) (2007) 1370-1376.

Recycled aggregate concrete,or recycled concrete,is a kind of concrete with aggregate made from waste concrete which has been broken,washed and classified to replace natural aggregate such as sand and gravel.And it is considered to be a new type of green building materials,which can save natural aggregate.
(4) Because steel belongs to isotropic materials,setting ,the UST becomes to Unified Yield Criterion.
The solution is suitable for various materials with different
Journal of Fuzhou University(Natural Science),2005,33(Supp):305-308
Bei Jing: Science Press,2003

With the development of science and technology, the request of the performance of accelerometers is increasingly higher and the precision of reference directly affects the performance of accelerometers.
The ratio R1/R4 is temperature-dependent due to different types of materials.
An even better material is high ploysilicon (lightly-doped polysilicon), since it has a negative TC.
Thus, the resistors of R2, R4 are implemented by high ploysilicon material.
Yu: A High-PSRR CMOS Bandgap Reference Without Resistor, Journal of Semiconductors(2008), p. 29(8)

Investigation of high cycle and low cycle fatigue interaction on fatigue behavior of welded joints Liangchen Wu1, a, Dongpo Wang1,b 1 School of Material Science and Engineering, Tianjin University, Tianjin 300072, China aulc_fj@126.com, bwangdp@tju.edu.cn Keywords: Welded Joints, Fatigue Behavior, Combined Cycle Fatigue, Low Cycle Fatigue, High Cycle Fatigue Abstract.
However, if it is superimposed on the low cycle load, the compound damage of material to engineering structures, in particular, to the welded structures, will be greatly accelerated.
Experimental Steel Q345 as specimen material for the welded structures was welded by CO2 gas shielded arc welding process.
Reference [1] Powell B E, Hawkyard M and Grabowski L: International Journal of Fatigue Vol.1(1997), p. 167 [2] Dungey C, Bowen P: Journal of Materials Processing Technology Vol. 10 (2004), p. 374 [3] Byrne J, Hall R F and Powell B E: International Journal of Fatigue Vol. 9 (2003), p. 827 [4] Matikas T E: Fatigue & Fracture of Engineering Materials and Structures Vol. 10 (2001), p. 687

The first one is the top grade and the last is the lowest one successively. 2.2 System function design 2.2.1 Page access (Function A) Detailed records for access would be included besides all statistics on the basis of courses, users, time quantum and web pages. 2.2.2 Forum posts inquiry and statistics (Function B) Detailed records for posts can be provided including all statistics on the basis of courses, users, time quantum and posts. 2.2.3 On-line testing records (Function C) Detailed records for students’ testing can be inquired including all statistics on the basis of courses, users, time quantum and tests. 2.2.4 Course materials inquiry (Function D) Detailed records for courses (the number and the capacity) have been done as well as the statistics on the basis of courses, time quantum and materials. 2.2.5 Active situations statistics ((Function E) Active courses can be found by collecting the data from Function A, B, C and D.
Its superiorities are as the following: the maintainability enhanced by resolving the concerns, free source code by Microsoft and community support, the application of Visual Studio which can promote the development, software construction apt to testing and division of labor. [12] Fig.1 Users’ permissions and functional structure of BBDA Table 1 Essential database Database Notes BBDA Course Courses information, synchronous with backend database BBDA User Users information，synchronous with backend database BBDA Activity Interview statements，synchronous with backend database BBDA Article Forum statements，synchronous with backend database BBDA Grade Testing，synchronous with backend database BBDA Material Materials，synchronous with backend database BBDA Role Roles，user defined 4 BBDA Based on MVC Structure Separation of Concerns (SoC), a very important concept, means the current concerns should be finished its own development when the software is designed without the interference from
[3] Chang J, Zhu ZJ, Liu D, Wu F, Design and practice of university English virtual learning community network platform, Journal of Southeast Agricultural University 9 (2012) 215-217
[5] Zhang XH, Application of auxiliary teaching of collaborative Blackboard and Blog, Journal of Shaanxi radio and Television University 3 (2012) 14-18
Higher Education Informing Science and Information Technology, 2006: 067-076 [9] Chen L, Analysis of network education platform use behavior, Journal of Nantong Textile Vocational Technology College 2 (2012) 38-41

Materials and methods Solder alloys were prepared from tin (99.99%), silver (99.99%) and copper (99.99%).
References [1] S.Nai, J.Wei and M.Gupta, Interfacial intermetallic growth and shear strength of lead-free composite solder joints", Journal of Alloys and Compounds, 473 (2005), pp. 100-106
[2] M.Matin, W.P.Vellinga, M.Geers, Microstructure evolution in a Pb-free solder alloy during mechanical fatigue, Materials Science and Engineering A 431 (2006), pp. 166-174
[4] L.Zhang, S.Xue, Y.Chen, Z.Han, J.Wang, S.Yu, F.Lu, Effects of cerium on Sn-Ag-Cu alloys based on finite element simulation and experiments, Journal of Rare Earths 27 (2009), pp. 138-144
[9] A.A.El-Daly, A.E.Hammada, A.Fawzy, D.A.Nasrallh, Microstructure, mechanical properties, and deformation behavior of Sn–1.0Ag–0.5Cu solder after Ni and Sb additions, Material and Design, 43 (2013), pp. 40-49