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References [1] Babuska, I.: Journal of Mathematical Analysis, Vol.8(6)(1976), p.603-634
[2] Babuska, I.: Journal of Mathematical Analysis, Vol.8(6)(1976), p.635-645
[3] Babuska, I.: Journal of Mathema- tical Analysis, Vol.8(7)(1976), p.923-937 [4] Bendsøe MP, Kikuchi N.: Computer Methods in Applied Mechanics Enginering.
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[10] Qie Yanhui, Liu Bo, Wang Xiuhong: Journal of hebut university of technology Vol.39(2)(2010), p.4–8(In Chinese)

Study on phenolic foams modified by Graphene oxide Jinpeng Luan1,a*, Xinfang Wei1,b, Xueping Zhou1,c, Guozhong Lu2,a*, Chenzhao Liu1,d, Guodong Li1,e, Yaxin Na1,f, Haiwang Wang1,g*,Xiwei Qi1,h* 1School of resources and materials, NortheasternUniversity at Qinhuangdao, Qinhuangdao, Hebei,China, 066004 2State Key Laboratory of Solid Waste Reuse for Building Materials, 100041, Beijing, China ajinpengluan@163.com,bwxf.ww@163.com, cluguozhong@163.com dxpzhou22@163.com,ewhwdbdx@126.com Keywords: graphene oxide, phenolic foam, percentage of close area, thermal conductivity.
Experimental Main raw materials and equipment.
Journal of chemical industry in guangzhou, 2011, 39 (7) : 16-18
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Two possibilities of material behavior are considered during the relaxation procedure: purely elastic relaxation and elastic-plastic relaxation.
Chou, Experimental evaluation of minimum quantity lubrication in near micro-milling, Journal of Materials Processing Technology. 210 (2010) 2163-2170
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Liang, Modeling of Residual Stresses in Milling, International Journal of Advanced Manufacturing Technology. 65 (2013) 717-733

Introduction The ionic liquid is a new kind of materials with the characteristics[1] of wide electrochemical windows, high conductivity, good thermal and chemical stability, viscosity and structural designother which the traditional materials do not have[2-5].
Reline ionic liquid has the characteristics of with water and air stable, easy to prepare, raw materials readily available and non-toxic, high conductivity, wide electrochemical windows.
Experimental Section Instruments, materials and reagents.
Journal of Jiamusi University(Natural Science Edition) Vol.25 (2007) (In Chinese) [13] Xiaojuan Wang, Hui Li, Jiao Wang, ect.
Materials Protection Vol.43 (2010) (In Chinese) [14] Shaojun Dong, Guangli Che and Yuanbin Xie.

Niero et al, Effect of the addition of the waste generated from the feldspar mining on the obtainment of ceramic brick, Materials Science Forum. 930 (2018) 164-169
M. do Nascimento et al, Use of Sewage Sludge in the Production of Light-Weighted Ceramic Bricks, Materials Science Forum. 514-516 (2006) 1706-1710
Series: Materials Science and Engineering. 365 (2018) 032066
Dubineckij, Sludge of the Fuel-Energy and Oil-Producing Complex in the Production of Wall Ceramic Products, Materials Science Forum. 945 (2019) 1036-1042
[22] Swaminathan Dhanapandian, Balasubramani Gnanavel, Thirunavukkarasu Ramkumar, Utilization of granite and marble sawing powder wastes as brick materials, Carpathian Journal of Earth and Environmental Sciences, 4 (2009) 147-160

However, to date the investigations on the induced magnetization by an applied electric field in the ME materials were seriously absent [6-7].
It helps us to understand the relationship between the ME and CME effect and the nature of the ME coupling, meanwhile it can help us to optimize the design of ME composite materials to get magneto-dependent sensor or wireless electronic controlled magnetic devices and so on.
Acknomledgment This research was supported by the National Nature Science Foundation of China under Grants 50971056 and Hebei Province Nature Science Foundation of China under Grants E2010000108.
[3] Ramesh R, Spaldin N A, “Multiferroics: progress and prospects in thin films,” Nature Materials, vol. 6, pp.21-29, 2007
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Materials and methods 1.1.
Materials and experimental design Experiments were conducted at the greenhouse of Shenyang University.
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Journal of Materials Processing Technology, 2007, 187, 250-255
Laser assisted micro-milling of hard-to-machine materials.
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Temp embrittlement of low alloy ferritic steels such as Cr-Mo steel and Cr-Mo-V steel, which are used for heat-resistant materials of the plant, occurs during long term service at 350 to 550℃.
Electrical resistivity method is useful to distinguish early degradation degree of low alloy ferritic steels, but it is difficult to distinguish the damage degree of long-term aged materials [4].
Magnetic characteristics measurement method is known superior in distinguishing the degradation degree of long-term served materials [5].
Ryu: Journal of the Korean Society for Nondestructive Testing Vol. 21 (2001), pp. 532-541 [5] K.S.
Nam: Journal of the Korean Society for Nondestructive Testing Vol. 20 (2000), pp. 424-43

Introduction In last two decades, nanocomposites are used in various technological areas such as optics, electronics, medicine, materials science and many other fields [1–5].
Ober, Nanocomposite materials for optical applications, Chem.
Szunerits, Gold–graphene nanocomposites for sensing and biomedical applications, Journal of Materials Chemistry B, 3 (2015), 4301-4324 [15] M.
Semaltianos, Nanoparticles by Laser Ablation, Critical Reviews in Solid State and Materials Sciences, 35 (2010) 105-124
Menazea, Different time's Nd:YAG laser-irradiated PVA/Ag nanocomposites: structural, optical, and electrical characterization, Journal of Materials Research and Technology, 8(2), (2019), 1944-1951