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This point shows surface residual compressive stress of metal materials gradually increases with the increment of laser energy until the laser energy increases to a threshold value.
Whilst, surface residual compressive stress of metal materials with laser shock processing can be obtained as well by operating mathematics models so as to realize real time monitoring.
International Journal of Rock Mechanics and Mining Sciences Vol. 36(1999) p.849-55
Journal of Applied Science Vol. 36(2001) p.1801-1807
Journal of Materials Science Vol. 36(2001) p.1801 – 1807

Introduction The printing registering precision can be influenced by many factors, such as the manufacturing precision and the assembly precision of the press itself, the adjusting accuracy when the machine is in use, and the materials used.
However, when the printing machine is in use, the registering precision may have a great change due to the adjustment of mechanics, extension of materials, and wear and tear of machine.
References [1] Cai Jifei, Zhao Hongbin, Zhang Zhuming: Journal of Tsinghua University: Science and Technology Vol. 40(2000), p.49-51, in Chinese [2] Cai Jifei, Peng Ming, Ren Hui, Wu Shuqin: Journal o f Beijing Institute of Graphic Communication Vol. 17(2009), p.30-34, in Chinese [3] Chen Yuhua, Shen Shaohua, Fang Ruiming, Zhao Jing: Journal of Beijing University of Technology Vol. 35(2009), p.1297-1302, in Chinese [4] Wu Shuqin, Wang Yiming, Cai Jifei, Zhang Shaohua: China Printing and Packaging Study Vol. 2 (2010), p.273 [5] Jia Yu-Ling, Qu Wei-Guo: Development ＆ Innovation of Machinery ＆ Electrical Products Vol. 23(2010) p.36-38. in Chinese [6] Lee Changwoo, Lee Jangwon, Kang Hyunkyoo: Journal of Mechanical Science and Technology Vol. 23(2009), p.212-220 [7] Kang Hyun-Kyoo, Lee Chang-Woo, Lee Jae-Min: Journal of Mechanical Science and Technology Vol. 24(2010), p.391-397
[8] Zhao Ji-bin, in: Offset Press Construction, Operation and Maintenance, edited by Chemical Industrial press (2007) [9] Zhao Ji-bin, Li Xiu-li: Journal of Beijing Institute of Graphic Communication Vol. 19(2011), p.27-29 [10] National Printing Machinery Standard Technology Committee: Printing Machinery Sheet-fed offset press, edited by China Standard Press (2011), in Chinese

Alloy Composition Design The glass forming ability rules in Mg-based materials.
This is another exception of Mg-based materials.
Materials Transactions, JIM, 2000, 41(11): 1372-1378
Materials Science and Engineering: A, 2001, 304-306(1): 1-10
Materials Research Bulletin, 2001, 36(12): 2183-2198

Materials and Methods FSW setup and materials The materials used in this research are AA6061-T6 and AZ31b.
Another motivation is that these materials exhibit a measurable difference in their radiographic response when subjected to X-ray CT making it easier to differentiate these two materials in X-ray CT images.
Nelson, A review of friction stir welding of steels: Tool, material flow, microstructure, and properties, Journal of Materials Science & Technology, 34 (2018), 39-57
Ball, A Review of Numerical Analysis of Friction Stir Welding, Progress in Materials Science, 65 (2014) 1-66
Feulvarch, On material flow in Friction Stir Welded Al alloys, Journal of Materials Processing Technology, 239 (2017), 284-296

Fig.1 The model of the bolt joints structure Fig.2 The finite element model Model Material and Boundary Conditions.
The relevant material constants are shown in Table 1 , and bolts are M6 × 25 standard steel bolts.
Acknowledgements This work was financially supported by the NSAF (10876034), National Science and technology major special Project (2011ZX04002-081) and Postgraduate Innovation Fund Project by Southwest University of Science and Technology (13ycjj44).
Beijing: Science Press, 2001(in chinese)
Part III: Power flow through isolation systems in Journal of sound and vibration, 1980,68(1): 97-117

However, most of the commercially available materials such as photo-polymers, powders, paper, wax, plastic materials, and even rubber, are only for the application of concept models, visual prototypes, and limited functional prototypes.
The physical properties of these materials are not suitable for functional prototypes or tooling applications[1-3].
Journal of Materials Processing Techonology, 2001, (109): 154-160 [3] Jeng-Ywan Jeng, et al.
Journal of Materials Processing Technology 110 (2001):98-103 [4] Gahr K H Zum, Schneider J.
Science and Technology of Advanced Materials, 2001, (2): 185-191

FS lasers have received a significant attention in the past decades for the processing of a range of materials, due to their extremely short pulse width and high fluence to achieve nearly damage-free ablation of materials [3].
Balasubramanium, Analysis of machining mechanism in diamond turning of germanium lenses, Procedia Materials Science, 5 (2014) 2363-2368
Rakwal, Experimental investigation of wire electrical discharge machining of gallium-doped germanium, Journal of Materials Processing Technology, 197 (2008) 419-427
Molian, A review of ultrashort pulsed laser ablation of materials, Journal of Laser Applications, 10 (1998) 18-28
Advanced Materials Research, 1136 (2016) 440-445

Himabindu, "Hydrogen production by PEM water electrolysis–A review," Materials Science for Energy Technologies, vol. 2, no. 3, pp. 442-454, 2019
Solanki, "A review on types, fabrication and support material of hydrogen separation membrane," Materials Today: Proceedings, vol. 28, pp. 1386-1391, 2020
Way, "Unsupported palladium alloy foil membranes fabricated by electroless plating," Journal of Membrane Science, vol. 316, no. 1-2, pp. 112-118, 2008
Weber et al., "Hydrogen selective palladium-alumina composite membranes prepared by Atomic Layer Deposition," Journal of membrane Science, vol. 596, p. 117701, 2020
Ghasem, "Modeling and simulation of CO2 absorption enhancement in hollow-fiber membrane contactors using CNT–water-based nanofluids," Journal of Membrane Science and Research, vol. 5, no. 4, pp. 295-302, 2019

Application of ANSYS in Grid Structure Hongjiang Chen1,a, YueHai Wu2,b 1Vocational technical college in Jiangxi Normal University of science and technology in china 2robotics industry department of shanghai ABB Engineering Co.
Fig.1 Schematic diagram of Link8 unit The material model selection[1].Grid structure of the material model selection but also to the entire simulation engineering accuracy has a major impact, the correct choice of material model, the virtual engineering reliability have major effect, once again we choose low carbon steel Q235 as the grid structure of the material, in order to reduce the computational load, avoid the material nonlinearity nonlinear problems, the Q235 for linear elastic materials, and the definition of its elastic modulus 201Gpa, Poisson's ratio is 0.3, allowable stress 210Mpa.
Compared with the original optimization the design before saving a lot of materials.
References [1] XueJie Ma: Based Ansys Optimization Design of truss, JiaoZuo Univesity Journal, Vol, 4(2004) P.18-24, in Chinese
[2] ChangZhong Ke,HaiBo Suo: Ansys Optimized Techology applied in the Construction Design,The Science and Technology of WuHan Journal,Vol,1(2005) [3] Ansys Company: Nonlinear analysis guide in Ansys [4] JiangHong Wang: Stress Relaxation of the Joint between Bolt and Flange, in: Steam Turbine Technology, 42(1), (2000) [5] Earl M.Smoley: Gasket Materials and Forms [J], in: Machine Design (1969), (6):67-73 [6] ANSYS Element Data-Base ansys10.0 help

Investigation into the Catalytic ability of Fibrillar Co-Y-B Catalyst in Hydrogen Production from Hydrolysis of Sodium Borohydride Chang Jing1,2,a and Du Fanglin1,b,* 1College of Materials Science and Engineering, Qingdao University of Science & Technology, Qingdao 266042, China 2College of Recourse and Environment, Qingdao Agricultural University, Qingdao 266109, China achangjing1103@yahoo.com, bfl_du@yahoo.cn, Keywords: sodium borohydride, hydrogen, yttrium, activation energy Abstract.
At present, the hydrogen is often stored by high-pressure tank, adsorbents and hydrogen storage materials.
Among them, chemical hydrogen storage method, i.e. storing hydrogen by some hydrogen storage materials, has some advantages such as high purity of generated hydrogen, high efficiency of hydrogen production and small volume of hydrogen storage materials.
Cho, Journal of Power Sources, 144 (2005), 129-134
Kwon, Journal of Power Sources, 180(2008), 484-490