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It is found that drilling method, speed of rotation (SOR), material properties, and length of compression drillstring all can influence parametric resonance zones.
Apart from SOR and drilling method, other factors such as material properties, length of compression drillstring and so on can also influence parametric resonance zones.
Acknowledgements This work is supported by Key Laboratory of Oil and Gas Equipment from Ministry of Education (2006STS02) and Science Foundation of Southwest Petroleum University.
Zhang: Chinese Journal of Applied Mechanics Vol. 17 (2000), p.128 Fig.3 Comparison of the 4th principal parametric resonance zones in air drilling. 0 100 200 300 400 500 0 200 400 600 mud drilling air drilling Pt (kN) P0 (kN) Fig.2 Comparison of the 4 th principal parametric resonance zones for SOR=80rpm. 0 100 200 300 400 500 0 100 200 300 400 N=60rpm N=80rpm Pt (kN) ∆P0 (kN) 0 100 200 300 400 500 200 400 600 800 N=60rpm N=80rpm Pt (kN) P0 (kN) ∆P0 (a) (b)

Microstructure and Damping Capacity of AlNp/Mg-Al Composites with Different Particle Contents Yong Wang1,2,a, Kaiming Cheng1,2,b, Jixue Zhou1,2,c*, Yuansheng Yang3,d 1Shandong Key Laboratory for High Strength Lightweight Metallic Materials, Advanced Materials Institute, Shandong Academy of Sciences, Jinan 250014, China; 2Shandong Engineering Research Center for Lightweight Automobiles Magnesium Alloys, Advanced Materials Institute, Shandong Academy of Sciences, Jinan 250014, China; 3Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China awangyong@sdas.org,bchengkm@sdas.org,c,*zhoujx@sdas.org,dysyang@imr.ac.cn Keywords: Powder metallurgy, Magnesium-aluminum matrix composites,Microstructure, Damping mechanism, Damping capacity Abstract.
The other refers to extrinsic damping that is results from the materials response to external condition.
Documentation of damping capacity of metallic,ceramic and metal-matrix composite materials[J].
Journal of Heilongjiang University of Science & Technology 2016; 01: 48-52
Documentation of damping capacity of metallic,ceramic and metal-matrix composite materials[J].Mater.

The material used in this study was a carbon steel plate purchased from a building materials shop.
This value is included in the category of materials with relatively good corrosion resistance.
Arvind, Materials for Ocean Structures, in Ocean Structures: Construction, Materials, and Operations, CRC Press, London, 2017
Maurice, Fundamental Aspects of Corrosion of Metallic Materials, in Materials Science and Engineering II: Encyclopedia of Life Support Systems (EOLSS),  2003
Iskandar, and S.Thalib, Corrosion Rate of Low Carbon Steel for Construction Materials in Various NaCl Concentrations, in International Conference on Science and Innovated Engineering (I-COSINE). vol. 536, Usman, Ed.

In 1980s, the appearance of the third generation permanent magnetic materials greatly promoted the development of permanent magnet synchronous motor (PMSM) owing to its high remanence, huge coercivity energy and low price.
The applications of new-style permanent magnetic materials in motors have not only impelled the reformation of motor structure, design technique and manufacturing process but also gave a qualitative leap to the performance of PMSM.
Naceri: submitted to World Academy of Science, Engineering and Technology, vol.45, pp. 299-304, 2008
[18] Haibing Hu, Qingbo Hu, Zhengyu Lu: submitted to Journal of Zhejiang University (Engineering Science), vol. 40, no. 12, pp. 2144-2148, 2006
[30] Yaguang Chen, Shuangyuan Zhao: submitted to Journal of Benxi College of Metallurgy, vol. 4, no. 4, pp. 28-31, 2002

Innovative product form design includes not only innovation for form, color and material, but also functional creativity.
Therefore, the shape of cushion is changed from the "2-D support" to the "linear support" assisted with soft material which fulfills the request of “allusion of shortening mealtime", as shown in Fig.7.
The soft, flexible and wearable material is used to produce the cushions, which can satisfy the requirement of comfortable mealtime.
Acknowledgements This work was financially supported by the China National Science Foundation under grant NSFC 50975186.
Shih: 6th Asian Design Conference International Symposium on Design Science, Tsukuba, Japan (2003) [6] Oya Demirbilek, Bahar Sener: Ergonomics, vol.46 (2003), p.1346-1360 [7] Shih-Wen Hsiao, Hung-Cheng Tsai: International Journal of Industrial Ergonomics, vol.35 (2005), p.411-428 [8] Yang-Cheng Lin, Hsin-His Lai: Techniques of Computational Intelligence for Affective Computing, vol. 16 (2005), p.618-624 [9] Edward de Bono: Serious Creativity (Harper Collins Publishers 1992) [10] V.V.Sushkov, N.J.I.Mars, P.M.Wognum: Artificial Intelligence in Engineering, vol.9 (1995), p.177-189

ACKNOWLEDGE The authors thank the National Science Council, Republic of China (Taiwan), for financially supporting this research under Contract Nos.
H.T.Lee, M.H.Chen, S.Y.Hu, C.S.Li, the 4th International Symposium on Electronic Materials and Packaging, Taiwan, Kaohsiung (2002) 3.
M.Abtew, G.Selvaduray, Materials Science and Engineering: R: Reports, 27 (2000) p.95 9.
P.T.Vianco, K.L.Erickson and P.L.Hopkins, Journal of Electronic Materials, 23 (1994) p.721 11.
H.T.Lee, M.H.Chen, Material Science and Engineering A, 333 (2002) p.24 13.

Experimental Study on the Seismic Behaviour of an Innovative Hybrid Concrete Connection Used as Thermal Break System Gaël LE BLOA1,3, a *, Hugues SOMJA2,3,b and Franck PALAS1,3,c 1 INGENOVA, Civil Engineering Office, 35000 Rennes, Bretagne, FRANCE 2 National Institute of Applied Sciences, Department of Civil Engineering, 35000 Rennes, Bretagne, FRANCE 3 ANR LabCom B-HYBRID, 35000 Rennes, Bretagne, FRANCE agael.lebloa@bet-ingenova.fr, bhugues.somja@insa-rennes.fr, cfranck.palas@bet-ingenova.fr Keywords: Seismic Design, Shear Link, Hybrid Connection, Steel-Concrete Joint, Experimental validation Abstract.
Tests demonstrate a very stable behaviour of the system up to its theoretical yielding capacity and a large reserve of ductility due to the material of steel members.
While thermal optimization leads to a minimization of the steel material, load-bearing capacities depend on these structural sections.
PCI JOURNAL, 1980
Journal Proceedings, 79(2):83–93, 1982

Statistical Analysis of the Development Tragedy of Low Carbon Economy of Hi-tech Industry in Shandong Province Zhiqin Huang1, a, Wei Wang2,b and Ting Yan3,c 1School of mathematical sciences, University of Jinan, Jinan, 250022, China 2 Educational department, Moscow university, Moscow, Russia 3 School of Political Science and Public Administration, Shandong University, 250100, P.R.
The government should enact Journal Circulation Economic Law, Energy Saving Law according to the actual facts of Shandong province enterprises.
As we all know, carbon emissions are mainly from the burning of fossil raw materials.
Increase investment in science and technology, and actively research and develop carbon-capture and sequestration technologies, alternative technologies, reduction technology, recycling technology, energy technology, biotechnology, new material technology, green consumer technology, ecological restoration techniques.
Factors influencing the strength of carbon emissions, Shanghai analysis [J], Environmental Sciences,2011(1):20-26 [7] Carbon Dioxide Information Analysis Center.

Sintering Behavior of Ceramic Green Body by Thermal Analysis Techniques Zhou Hai-qiu1,a, Xiao Han-ning1,b and Hu Xue-yan2 1 College of Materials Science and Engineering, Hunan University, Changsha 410082, P.R China 2 Dalian Insulator Co.
Introduction Sintering is an important process for the production of ceramic materials.
Simultaneous thermal analyzer (Netzsch-STA449C) was used for TG and DSC analysis, with a heating rate of 10°C/min up to 1300°C in air, using a-alumina powder as reference material.
Li: Journal of Hazardous Materials Vol. 150(2008), p.394
Hong: Materials Research Bulletin Vol. 34(1999), p.771

Metal elastic-jumping membrane’s designation involves the parameters membrane material, membrane size, membrane profil and membrane forming’s heat treatment technology.
It will be seen from this that metal elastic-jumping membrane’s spherical shell structure’s stability bearing evenbearing concerns with the load physical dimension material werkstoffart (stiffness) and constraint condition.
Metal elastic-jumping membrane’s finite element model basal hypothesis includes[6] : Neglect the welding materials on the elastic-jumping membrane, handle as the isopachous homegeneous material with the same capability; ② Neglect elastic-jumping membrane center’s connection structure and tensile force, handle as the free-end’s bearing. ③ The article emphasizes the membrane’s feature when it is the way of sliding fixing, with the fixing as the constraint of the periphery of the membrane.
Mechanical science and technology for aerospace engineering ，2008,27(7):914～916
Structure design and finite element analysis of self-validating pressure sensor[J]. chinese journal or srnsors and actuators，2007,20(2):279～282.