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Constantly, the temperature is lower than 80% of the materials melting point[2].
The search expressed that mass materials upside transfers to front of its initial position after welding; The materials of mid transfer the rear of its initial position after welding ;The bottom materials of the weld take place in the rear of the initial position.
Recently friction stir welding process for joining of composite materials also shows good prospects[18].
Materials Review, 2007, 21 (1): 86-92 [17] YAO Jun-shan, ZHANG Yan-hua, WANG Guo-qing, et al.
Aerospace Materials & Technology, 2003 (4): 24-27 [18] Dawes C J, Thomas W M.

With the development of industry and agriculture, arsenic contained material was used frequently.
Materials and methods 1.1 Sample preparation The coal gangue was collected by serpentine layout method and soil was collected by quincunx method.
Journal of soil and water conservation, 2010.24 (1): 109~113.
Environmental Science, 2009.30 (4): 956~962
Journal of Earth Science, 2006.27 (4): 355~366.

With the development of modern information science technology, new media technology will be used in teaching process, teaching media will become increasingly rich allowing teaching mode also occurred change.
Teaching resources include electronic materials, courseware, instructional video, exercise database, links, algorithm library, etc. part of the flash presentation.
References [1] linux journal , http://www.linuxjournal.com/article/5071, 2004
J. et al, Open source software and computer science education, Journal of Computing Sciences in Colleges, 2003, 18(3): 1-7
P., Computer Science Education in 21st Century, Communications of the ACM, 2006, 49(3)

Experimental Materials .(1)APMP pulp was obtained from Shandong Dezhou Zhongsheng Maoyuan co., LTD
Acknowledgement This study was financial supported by National Natural Science Foundation (No. 31270626).
Isolation of Residual Kraft Lignin in High Yield and Purity [J].Journal of Pulp and Paper Science, 2002,28(2):50 [3] Wu S, Argyropoulos D S.
Journal of Pulp and Paper Science, 2003,29(7):235 [4] Steaphanie Baumerger, Paterice Dole, Catherine Lapierred.
Beijing: science press, 2012

Derjaguin, et al., Results of analytical investigation of the composition of “anomalous” water, Journal of Colloid and Interface Science. 46.3 (1974) 437-441
Yu, Investigation of internal frost damage in concrete with thermodynamic analysis, microdamage modeling, and time-domain reflectometry sensor measurements, Journal of Materials in Civil Engineering. 25 (2013) 1248-1259
Fen-Chong, Effect of supercooling on the instantaneous freezing dilation of cement-based porous materials, Journal of Building Physics. 40 (2) (2016) 1-24
Lifanov, Dilatometric studies of cement and other building materials (including the development of a dilatometer and research methods), Dissertation for the academic degree of cand. of tech. sciences.
Solovev, Modelling of Ultrasonic Concentrators for Processing of Volume Nanostructured Materials, Materials Science Forum, Vol. 992 (2020) 940-946.

Effect of Supplementary Curing after Steam-curing on Performance of Concrete Xiao Lia, Wan-yang Niu School of Materials Science and Engineering, Shenyang Jianzhu University, Shenyang 100071, China alixiao7903@163.com Keywords: Steam-curing concrete, Curing, Density, Strength Abstract.
Experimental Raw Materials.
Hydration process of compound cementitious materials under steam curing condition.
Journal of Building Materials, 14, 1 116-118
Construction and Building Materials, 25, 1 123-128

The method of microindentation is widely used to evaluate plasticity and hardness of ceramic materials.
It was found out that the resistance to the introduction in brittle and plastic materials is mostly determined by elastic interaction forces between the contacting materials and destruction phenomena.
Strength refractory compounds and materials on theer basic.– М.: Мetallurgy, 1989
I., Zhurnal tekhnicheskoi fiziki (Journal of technical physics) 10, vol.73 (2003) 139 [5] Akio Yonezu, Baox Ing Xu, Xi Chen., Materials Science and Engineering A. 507 (2009) 226 [6] Lyakishev N.
Byulleten’ MOM (Perspective direction of materials production and processing.

Chang, “Optimal disk clamp design to minimize stress variation of disks in a hard drive,” Journal of Mechanical Science and Technology, vol. 23, pp. 2645-2651, 2009
Hu, "Parameters Optimization for Injection Molding Based on Digital Signal Processing," Applied Mechanics and Materials, vol. 433-435, pp. 1890-1893, 2013
Ruan, "The optimization analysis of the conditions for optimal parameter combination of husker capacity by response surface method," Applied Mechanics and Materials, vol. 433-435, pp. 2203-2207, 2013
Rojanarowan, "Seal strength improvement of valve-regulated lead-acid (VRLA) battery," IOSR Journal of Engineering, vol. 3, pp. 39-43, 2013
Qi, "Research and Application of Special Vehicle Design Based on the FMEA," Applied Mechanics and Materials, vol. 404, pp. 171-176, 2013

Hou 4,d 1,2,3,4State Key Laboratory of Materials Modification by Laser, Ion, and Electron Beams, School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China a yyhedlut@163.com , b gfzhangde@yahoo.com.cn , c liguoq@dlut.edu.cn , d xdhde@yahoo.com.cn Keywords: Amorphous diamond films, Electrolysis Abstract.
It can be seen from Fig.2 that the films are continuous and compact and the ball-like crystal grains are about 300 nm in diameter. 3.3 Microstructure analysis (Raman) Raman spectroscopy is one of the most important tools for characterizing diamond and DLC materials.
NEW CARBON MATERIALS, 2002.3 (17):62-70
Journal of Inorganic Materials 2002, 17(3) 571-578 [11] He-Sun Zhu, Jin-Ting Jiu, Hao Wang, Chuan-Bao Cao.
Journal of Materials Science.38 (2003)141-145 [12] Guo Dong, Cai Kai, Li Long-tu, Gui Zhi-lun.

The surface properties of UHWMPE and metal are very different, so it is more difficult to improve the bonding strength between the two materials.
EXPERIMENTAL Materials Chloroprene rubber A-90 (CR) was provided by Japan NEC Chemistry.
In addition, the main chains of CR/MMA rubber have both polar groups and non-polar groups, thus it has a strong adhesive force to polar and non-polar materials.
[4] Gongde Liu and Huilin Li: submitted to Applied Polymer Science (2003)
[5] Maoyuan Wang and Ligan Qiu: submitted to Journal of Suzhou University (Natural Science Edition) (2003).