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Connections of intra- and extra-regional materials of cities, which are regional centers, are primarily realized by communication.
As for urban fringe areas, communication is the main channel for interaction and circulation of people, materials and information.
PhD dissertation, Chinese Academy of Science, 2002.
(In Chinese) [4] Fengyun Mou, Zengxiang Zhang, Chi Yaobin et al: Journal of Remote Sensing Vol.11, No.2 (2007), p. 257-268.
PhD dissertation, Chinese Academy of Science, 2005.

Shearing patterns of AZ31 Mg Alloy processed by equal-channel angular pressing via various route Xiao-ming Feng1, a, Tao-tao Ai1, b 1Department of Materials Science and Engineering, Shanxi University of Technology, Hanzhong 723003, China afxmhz@126.com, baitaotao0116@126.com Keywords: Equal-Channel Angular Pressing, AZ31 Mg alloy, grain refinement Abstract.
It is well known that materials with ultrafine-grain have excellent mechanical properties.
Reduction of the mean grain size is expected to increase the yield strength and also the ultimate tensile strength at room temperature and to promote superplastic deformation at higher strain rates and/or lower temperatures than those conventionaly used for large grain size materials.
Equal-Channel Angular Pressing (ECAP) is now an accepted processing technique for the development of an ultrafine-grained (UFG) structure in bulk materials.
Nam: Journal of Alloys and Compounds Vol. 394 (2005), p. 194 [10] X.

There are several types of materials used in RRAM, such as perovskite-type oxides [1, 3, 5], binary metal oxides [2-4, 6], organic compounds [7, 8], amorphous Si [9], and solid-state electrolytes [4].
Among the RRAM materials being studied, binary metal oxides are most favorable because of their simple constituents, compatible with CMOS processes, and resistive to thermal/chemical damages [2, 4, 6, 10].
Sawa: “Resistive switching in transition metal,” Materials Today, vol. 11, no. 6, pp. 28-36, Jun. 2008
Szot: “Redox-based resistive switching memories – nanoionic mechanisms, prospects, and challenges,” Advanced Materials, vol. 21, no. 25-26, pp. 2632-2663, Jun. 2009
Ozgur: Zinc Oxide: Fundaments, Materials and Device Technology, Berlin: Wiley-VCH; 2009

Numerical Simulation of Laser Welding for Different Thickness Aluminum Alloy Plate Zhang Tian Yu1, a, Chen Hua(corresponding author)2,b 1School of Materials Science & Engineering, Changchun University of Technology, Changchun 130012, China 2Key Laboratory of Advanced Structural Materials, Ministry of Education, Changchun University of Technology, Changchun ,China atiantian050203@163.com, bchenhua@mail.ccut.edu.cn Keywords: Laser welding; Different thick plate; Temperature field; Stress field Abstract.
Introduction Light metal materials are more and more used in the transport industry,to reduce the vehicle's weight and improve transport capacity [1,2].Aluminum alloys have been widely applied in automotive lightweight and high speed train as low density, high plastic ,easily formed, and anti-erosion.
T .in:Laser Materials Processing of High Strength Aluminum Alloys,edtied by National Defence Industry Publishing,Bei Jing(2008),in press [2] X.J.Hui,Y.S.Rong and F.D.Zhang et al .Welding Vol,19(2006),p63-64 [3] G.A.
Journal of Materials Processing Technology Vo.198(2008) P. 260- 269

Analysis of Grinding Power In general, the most of work to be absorbed for deformation and friction of materials converts into heat energy at normal temperature, namely the thermal effect.
For grinding process, the deformation and friction of materials as the main work is generated through the whole process.
Cai,: Advanced Materials Research, Vols. 44-46 (2008), p. 135-141
[3] S.C.Xiu, G.Q.Cai: Chinese Journal of Mechanical Engineering, Vol.42(2006), No.11, pp.197-201.
[5] S.C.Xiu, S.X.Yuan and G.Q.Cai: Key Engineering Materials Vols.389-390 (2009) p. 229-234.

Introduction Traditionally, automatic in-line surface inspection of materials has been performed using a camera to acquire an image of the light scattered from the surface [1].
Only in this manner can the quality of the material be ensured.
Presently the solution to these problems is to emboss a code as a 3D structure into the surface of the material.
Lin, “Computer-aided visual inspection of surface defects in ceramic capacitor chips,” Materials Processing Technology, vol. 189, pp. 19–25, 2007
Journal of Electronic Imaging, vol.18, pp. 1–38

Materials response to heat treatment was first investigated by Brinell hardness measurements.
This confirm the assumption of coarsening of precipitates, as discussed also by other researchers [3], even though this phenomenon is not so marked to affect materials hardness, as shown in Fig. 1.
Traverso: Journal of Alloys and Compounds Vol. 695 (2017), p. 2180
Lee: Materials Letters Vol. 60 (2006), p. 1880
Svensson: Materials Science and Engineering A Vol. 490 (2008), p. 385

The materials used in this numerical test are Aluminium Alloy 5182 [3].
Table 2: Properties of the steel side door system (target) Side door  Material IE (kJ) Max.
Vieregge: Materials Science and Engineering: A Vol. 280(1) (2000), p.37
Tsuchida and S.Tanimura: Journal de Physique (1991), p. 347
Sahari and A.A Nuraini: Key Engineering Materials Vols. 471-472 (2011), p. 484

Susthitha Menon3 1School of Microelectronic Engineering, Universiti Malaysia Perlis (UniMAP), Kampus Alam, Pauh Putra, Perlis, Malaysia 2School of Materials Engineering, Kompleks Pusat Pengajian Jejawi 2, Universiti Malaysia Perlis, Jejawi, Perlis, Malaysia, 3IMEN, Universiti Kebangsaan Malaysia, Bangi Selangor, Malaysia aCorresponding email:vc.sundres@gmail.com Keywords: heat slug geometry;rectangular heat slug; cylindrical heat slug; copper diamond heat slug;high power LED; junction temperature;von Mises stress;Ansys Abstract.
Table 2.Material properties Material Thermal conductivity k (W/m°C) GaN 130 Sapphire 42 Au–20Sn ( Die Attach) 57 Copper Diamond (Heat slug) 650 MCPCB 201 TIM 0.75 Aluminum(Heat sink) 237 The 3D LED model was meshed with grid independence of 229302 tetrahedral elements and 218400 tetrahedral elements for each respective 3D LED model with rectangular heat slug geometry and cylindrical heat slug geometry.
Luo, "Structural optimization of a microjet based cooling system for high power LEDs," International Journal of Thermal Sciences, vol. 47, pp. 1086-1095, 2008
Zanoni, "Accelerated Life Test of High Brightness Light Emitting Diodes," Device and Materials Reliability, IEEE Transactions on, vol. 8, pp. 304-311, 2008
Retnasamy, "Operating Temperature Analysis of LED with Cylindrical Cu Slug," Applied Mechanics and Materials, vol. 487, pp. 145-148, 2014.

Aluminum Borate Whiskers Growing by Compensation of TiB2 Zhang Dongminga , Li Youjun b, Zhang Lianmengc and Guo Jingkund State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology, Wuhan, 430070, China a email:zhangdongming71@hotmail.com, cemail: lmzhang@mail.whut.edu.cn, Keywords: Aluminum Borate Whisker, preparation, phase transformation, TiB2 Abstract.
The results indicate that TiB2 was decomposed into TiO2 and B2O3 in the calcining process in the active [O] atmosphere. 2Al2O3.B2O3 was formed in the lower temperature with reaction of Al2O3 and B2O3, while 9Al2O3.2B2O3 whiskers were grown by compensation of 2Al2O3.B2O3 at higher temperature (above 1050 o C) Introduction Aluminum borate whiskers with excellent physical properties, such as high strength, high modulus, temperature resistance, electric insular and heat insular, has become potential candidates to fabricate metal-matrix materials or ceramic or polymer matrix materials.
Experimental 1 Preparation of Aluminum borate whisker Industry pure of NH4Al(SO4)2.12H2O was used as raw materials to prepare saturated solution with distilled water at 20 o C.
Comparing the products of pure materials with mixture powder calcined at the same temperature, the differences can be identified easily.
Acknowledgements This work was supported by National Natural Science Foundation of China (50220160657).