Search results

We want to find how to use computer to arouse students’ study interest of higher mathematics, where we consider this emphasis on interactive teaching and computer problems (mainly in higher mathematics).It is not only to consider the computer how to help teaching more exciting, but also to make students understand computer theoretical basis better and more effective understanding of course materials.
From the initial BASIC, C-language to the current module language, we only learn computer science courses to better application of computer, while it can be played a larger role.
And there are so many materials can be used in the Internet.
Based on the above analysis, we should have efforts to analysis of teaching materials, improve the class teaching’s efficiency by helping of CAI and help students build good habits of study and thinking way.
References [1] Zhang Ju, “Heuristic teaching,” Journal of Chifeng University(Natural Science Edition)Systems Engineering and Electronic, vol. 23, no. 2, pp. 56-57, 2001

Materials Characterization.
Journal of Wuhan University of Technology (Materials Science Edition).
Journal of Wuhan University of Technology (Materials Science Edition).

Research on fatigue fracture defect of 23CrNi3Mo drill steel Bin Huang 1,2,a, Ya-zheng LIU 1,b, Le-yu ZHOU 1,c , Guo-wei LI 1,d, Dan ZHANG 1,e 1 School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 10083, China 2 Xining Special Steel Group Co.
Materials of sample A and B are 23CrNi3Mo, chemical composition is shown in table 1.
Transition of fatigue failure mode of Ni–Cr–Mo low-alloy steel in very high cycle regime [J]．Journal of Materials Processing Technology．2000，103(2)：276-279
The initiation and propagation of stress corrosion cracking in AISI 4340 and 3.5Ni-Cr-Mo-V rotor steel in constant load tests [J]．International Journal of Fatigue．2010 (32)：541-550．

APPLICATION OF ANODIC TITANIUM OXIDE TO DYE-SENSITIZED SOLAR CELLS Woo young kim, Yoonmook Kang and Donghwan Kim Department of Materials Science and Engineering, Korea University, Seoul 136-701, Korea Keywords: Photovoltaic, dye sensitized solar cell, anodic titanium Abstract.
Some research groups reported that the properties of such electrodes could be improved by mixing titanium oxide with other materials [2].
Grätzel, A low-efficiency solar cell based on dye-sensitized colloidal TiO2 films, Nature 353, 737 (1991) [2] Athapol Kitiyanan, Susumu Yoshikawa, The use of ZrO2 mixed TiO2 nanostructures as efficient dye-sensitized solar cells' electrodes, Materials Letters 59 (2005) 4038 - 4040 [3] Motonari Adachi, Yusuke Murata, Issei Okada, Susumu Yoshikawa, Formation of titania nanotubes and applications for dye-sensitized solar cells, Journal of The Electrochemical Society, 150 (8) G488-G493 (2003) [4] Michael Grätzel, Review Dye-sensitized solar cells, Journal of Photochemistry and Photobiology C: Photochemistry Reviews 4 (2003) 145-153 [5] G.K.
Science 1995; 268:1466-8. 0.0 0.2 0.4 0.6 0.8 -0.4 -0.3 -0.2 -0.1 0.0 Current density(mA/cm 2) Voltage(V) illumi. 0.00 0.25 0.50 0.75 -1.0 -0.5 0.0 Current density(mA/cm2) Voltage(V) illumi.

Product Module Division Method Based Degree of Modularity Yanhui Chen1,2, a and Yueping Chen1,2, b 1School of Mechanical Engineering, Guangxi University of Science and Technology, Liuzhou, Guangxi, 545006,China 2Guangxi key laboratory of Automobile Components and Vehicle technology, Guangxi University of Science and Technology, Liuzhou, Guangxi, 545006,China agxut_jx@163.com, bchenyueping99@126.com Keywords: Degree of Modularity; Modularity; BOM; working unit Abstract.
Table 1 Relevancy Definition of the Spare Parts of the Products Relevancy Geometric Correlation Functional Correlation Physics Correlation 0.7-0.9 No partitioned connection Joint completion, indispensable Energy flow occurs 0.4-0.6 Partitioned stationary connection Strong miscellaneous function relation Information flow occurs 0.1-0.3 Partitioned movable connection Medium miscellaneous function relation Material flow occurs 0 No connection No function correlation or weak No relation Therefore, the calculation formula of degree of correlation between spare parts can be defined as: (1) Where, are respectively physical correlation, geometric correlation and functional correlation of , are respectively corresponding weighting factors of physical correlation, geometric correlation and functional correlation, selection of weights needs to be based on the actual situations of the product.
Acknowledgements This work was financially supported by the The 12th Five-year Science and Technology Support Plan (2012BAF12B18), Guangxi Natural Science Foundation (2011GXNSFF018004), the fund of Guangxi key laboratory of Automobile Components and Vehicle technology(13-051-38),and the fund of S&T of Guangxi Province (12118017-3).
Jagannath Prasad, Srikanth Allamneni, Modular Product Design: A Life-cycle View, Journal of Design and Process Science, Vol 3, pp 1-9, Num 1999
CHINESE JOURNAL OF MECHANICAL ENGIN EERING, Vol 39(2003), p.149-154 (In Chinese)

FCC equilibrium catalyst is used for the bed material in the tests, whose mean diameter is 67 μm，packing density ρs is 940 kg/m2·s and particle density ρp is1500 kg/m2·s.
China Powder Science and Technology, 2001, 7（3）：6-10
Chemical Engineering Science, 1999, 54: 5541-5546
Chemical Engineering Science,2007, 62:3473 – 3493
Journal of Sichuan University (Engineering Science Edition),2005,37（5）:46-50．

3-D Optimization of Self-balanced Torsion Bar Diameter and its Fillet Radius by FEM Linfeng Wu1 Xiaochun Yin2 and Zhonghua Liu3 1Department of Mechanics & Engineering Science of Nanjing University of Science & Technology Nanjing, China and Department of Mechanical Engineering of North China Institute of Water Conservancy and Hydroelectric Power Zhengzhou, China 2,3Department of Mechanics & Engineering Science of Nanjing University of Science & Technology Nanjing, China 1e-mail: wulinfeng@ncwu.edu.cn Keywords: Theory,Diameter optimization of torsion bar,Fillet radius optimization Abstract.
Results and Analysis The finite element model was calculated and the stress and strain contours were got as fig.3.Max tangential strain occured in cantilever end of transmission crank from Fig.3(a).Due to the symmetrical structure of the system and the anti-symmetrical load,the deformations of the two end had the same(transmission of element nodes,slightly different size).Max tangential strain was 0.014268m (it was equivalent overall angle ),and strain was in the opposite direction.Min strain occured in the middle of torsion bar and strain increased from the middle to the two ends.And the max value occured in the fillets.Max von Mises stress was 280MPa from Fig.3 (b),which was less than yield strength value of 785MPa in the material given.The whole designed structure was safe.The larger stress lies in:①the contact surfaces between torsion bar and the bearing inner ring;② the contact surfaces among torsion bar,crank,and roller spline;③Torsion bar fillets.The lower stress lies in:①non-contact
Acknowledgement The results reported here were obtained while the author was on study leave at Nanjing University of Science & Technology.The author would like to thank Professor YIN Xiaochun and his coworkers for their assistance in making the convertor system available and for this work and their help in the preparation of the manuscript.
Liu: Numerocal Simulations of Thermal-mechanical Stress of Convertor Loop with Complicated Multi-contactsurfaces by 3-D Nonlinearing Finite Element, Journal of Mechanical Strength.
Wang: the Determination of the Strain Dynamic Loading Factor in the Bracket Circle of the Combined Blown Converter,Journal of Mechanical Strength, Vol.15, (1993) No.3, pp.7~10

The material properties are shown as follows: density=7850 kg/m3, Young’s coefficient= 210GPA, Poisson’s ratio=0.3, yielding stress=400MPa, equivalent fracture strain is 0.4-0.25, stress triaxiality=0.3, equivalent stain rate: 0-10.
Acknowledgement The authors would like to acknowledge the National Science Council of Republic of China for financially supporting this work under contract NSC 101-2221-E-012-001.
Y., “Interaction of a plane acoustic wave with an elastic spherical shell, ” The Journal of the Acoustical Society of America , Vol.47, pp.1325–1333, 1970
J., “The Axisymmetric Buckling of Initially Imperfect Complete Spherical Shells,” International Journal of Solids and Structures, Vol.5, No.7, pp.679-697, 1969
Brett, George Yiannakopolous, “A study of explosive effects in close proximity to a submerged cylinder”, International Journal of Impact Engineering 35 pp.206-225, 2008.

The error is given as the following (6) Where η is transmitted coefficient, which depends on properties of the material.
Acknowledgment This work is partially supported by the National Natural Science Foundation of China(No.10926072)to M. li; National Natural Science Foundation of China(No.60907041)to M.
Journal of Sound and Vibration . 2009,327: 564–583 [2].
Journal of Microelectromechanical Systems 13 (2) (2004) 323–331
Journal of Chinese Inertial Technology . 2009, 17(5): 604-607 (in Chinese )

The face skins and the honeycomb core may consist of various materials.
Chinese Journal of Applied Mechanics, 28-3 (2011), 275-282
The mechanics of two-dimensional cellular materials, J.
Mechanics of Composite Materials[M].
Journal Of Aeronaut Ical Materials, 24-3 (2004) 26-31