Search results

Therefore, the lower focus of the bifocal optic is located underneath the materials surface.
Used materials are aluminium alloy EN AW6082 and steel S235 (Table 1) as sheets of 10 mm thickness.
Table 1: Chemical composition of the used materials.
At increasing welding velocity a tendency to higher spatters per second is visible for both materials and both optics.
Simulation of keyhole evolution, velocity, temperature profile, and experimental verification, Metallurgical and materials transactions (2002) Volume 33A

Fabrication and spectroscopic properties of transparent Yb:YAG laser ceramics Dewei Luo1, Jian Zhang2, *, Changwen Xu1, Hao Yang3, Xianpeng Qin1, Jan Ma2,3 and Dingyuan Tang1, 1School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 2Temasek Laboratories, Nanyang Technological University, Singapore 3School of Materials Science and Engineering, Nanyang Technological University, Singapore *corresponding author: jianzhang@ntu.edu.sg (Dr Zhang Jian) Keywords: Yb:YAG, laser ceramics, sintering.
High purity Y2O3, Al2O3 and Yb2O3 powders were used as the starting materials.
Ytterbium doped YAG (Yb:YAG) ceramics have been one of the popular materials among them.
Byren, Low-heat high-power scaling using InGaAs-diode-pumped Yb:YAG lasers, IEEE Journal of Selected Topics in Quantum Electronics, 3 (1997) 105 – 116
Yanagitani, Yb3+-doped Y3Al5O12 ceramics – A new solid-state laser material, Phys.

Hall, Ahmad, and Smith (1990) presented a targeting method based on weighting factor which can account for non-uniform costs due to different materials of construction[3].
Capital cost targets for heat exchanger networks comprising mixed materials of construction, pressure ratings and exchanger types.
Cost effective heat exchanger network design with mixed materials of construction.
Iranian Journal of Chemistry & Chemical Engineering, Vol.23, issue2, 89-100, 2004 [7] A.
Journal of Chemical Industry and Engineering(In Chinese), Vol.60, issue6, 2265-2270, 2009

Acknowledgments The authors acknowledge the financial support from the Major Program of the National Natural Science Foundation of China(No. 11290154), China Postdoctoral Science Foundation(No. 2013M540773) and Shaanxi Province Postdoctoral Science Foundation , China.
Journal of Intelligent Material Systems and Structures, 8 (1997) 801-809
International Journal of Solids and Structures, 49(2012) 739–747 [7] D.
Duan, Chinese Journal of applied mechanics. 25 (2008) 617 -621(in Chinese)

At the node N4 , the bucket is full and begins to lift the media; at the node N5, the bucket and the soil material in it move upward with the same velocity, leaving two streams of soil flowing down.
Acknowledgements This work is supported by the Science and Technology Project of Wuhan Science and Technology Bureau under grant number # 201271130442 and by the Fundamental Research Funds for the Central Universities of Wuhan University under grant number # 201120802020002.
Cundall: International Journal of Rock Mechanics, Mineral Sciences and Geomechanics Vol. 25 (1988), p. 47-65
Favier: International Journal for Numerical Methods in Engineering Vol. 51 (2001a), p. 1407-1421
Favier: International Journal for Numerical Methods in Engineering Vol. 51 (2001b), p. 1423-1436

Nowadays, atmospheric pollutants diffusion studies encounter a difficulty that the access to data is less.It is suitable to choose the gray system theory to construct predictive model .And the cause of PM2.5 is relatively complex, the research suggests, AQI monitoring indexes of sulfur dioxide (SO2), nitrogen dioxide (NO2), nitric oxide (NO) is formed under certain conditions of PM2.5 in front of the main gas material.
References [1]LIU Chang wei.The mathematical model study of polluting fountain diffusion concentration in air pollution.Journal of Baotou University of Iron and Steel Technology ,2002(04):376-379 [2]Mayila Mushajang.Research of Desertifi cation on the Predicting Model.XinjiaIlg Agricultural Sciences.12，49(5)：968—973 [3]Shi Dongwei.
Journal of Henan Institute of Science and Technology. 2012(4):55-58 [4]DENGJin一hua.Matlab applied in analysis of dispersion of chemical dangerous gases.
Journal of Safety Science and Technology. 2005(10):94-96

Material models are used as follow, yield strength (fy) is 385.5MPa，elastic modulus(E) is 2.06×105Mpa, Poisson ratio (v) is 0.3.
Acknowledgements This work described in this paper was supported by National Science Found of China (51008200), Program for Liaoning Excellent Talents in University (LJQ2011059) and Science and Technology Program of Shenyang (F12-277-1-31).
References [1] S.Narayanan, M.Mahendran: Journal of Constructional Steel Research, Vol.59 (2003) No.4, p.489 [2] C.D.Moen, B.W.Schafer: Thin-Walled Structures, Vol. 46 (2008) No. 10, p.1164 [3] C.D.Moen, B.W.Schafer: Journal of Structural Engineering, ASCE, Vol. 137 (2010) No. 5, p.559 [4] Y.H Yao, Z.Y Wu, B.
Cheng, J.B Deng: Journal of South China University of Technology, Vol. 39 (2011) No. 9, p.61 (In Chinese) [5] R.
(Science Press, Beijing 1989) (In Chinese) [6] C.G Wang: Stability behavior analysis and experimental study on singly-symmetric cold-formed thin-walled steel members under compression loading.

Specifications of the helical gear pairs Gear pairs GP1 GP2 GP3 GP4 Addendum modification coefficient, 0.74 1.1 0.74 1.1 Addendum modification coefficient, 0.05 -0.31 0.05 -0.31 Face width, 28 28 38 38 Transverse contact ratio, 0.89 0.68 0.89 0.68 Overlap ratio, 1.02 1.02 1.38 1.38 Total contact ratio, 1.91 1.70 2.27 2.06 Average mesh stiffness, [ 247.1 148.8 274.1 160.2 Material steel/steel steel/steel steel/steel steel/steel A computer program was developed for simulating the dynamic characteristics of helical gear pairs.
Tsay, Tooth Profile Design for the Manufacture of Helical Gear Sets with Small Number of Teeth, International Journal of Machine Tools and Manufacture, 45 (2005) 1531–1541
Evaluation of Engagement Accuracy by Dynamic Transmission Error of Helical Gears, The 3-th European Conference on Mechanism Science Eucomes 2010, Mechanisms and Machine Science, Vol.5, New Trends in Mechanism Science, Springer Publishing House, (2010) 421-428
Journal of Mechanical Design, Transactions of the ASME, Vol. 30 (2008) 052603/1-9
Journal of Tribology, 126 (3) (2004) 597-604.

Zhou1 1School of Materials Science and Engineering, Dalian University of Technology, Dalian 116085, P.R.
These compressive stresses result from the combined actions of the press of the spinning wheels and the restriction of the surrounding materials to the expansion deformation of the contact regions in the circumferential and axial directions.
Li, Journal of Materials Processing Technology, 129(2002) 326-329
Ma, Journal of Materials Processing Technology, 187-188 (2007) 486-491
Monaghan, Journal of Materials Processing Technology, 121 (2002) 43-49.

The isotherms for the calcined SBA-15 sample were of type IV and exhibited a well-defined H1 hysteresis loop according to the IUPAC classification relative to mesoporous materials [6].
Vansat: Microporous and Mesoporous Materials Vol.125 (2009), p. 170
Dominique: Microporous and Mesoporous Materials Vol. 79 (2005), p. 29
Marchetti: Journal of Ctalysis Vol. 278 (2011), p. 310
Sun: Studies Surface in Science Vol. 167 (2007), p.103.