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The Design of Course-Oriented Online Judge Chao Yia, Xiaoyu Dub, Su Fengc, Siyuan Lid and Yue Zhuoe College of Information Science and Technology, Beijing Normal University, Beijing, China, 100875 a yichao@mail.bnu.edu.cn; b xyjian@mail.bnu.edu.cn; c fengsu@bnu.edu.cn d lisy@mail.bnu.edu.cn; e zyue1105@mail.bnu.edu.cn Keywords: Component; Course-Oriented; Online Judge; Collaborative Learning Platform; Diversified Answers Abstract.
It supports rates between members.[3,4] Teachers can upload courseware in WebCL, or use links as teaching materials.
Conclusively, compare to the Web-Based Collaborative Learning Platform and traditional Online Judge, COOJ can serve computer science education better, and should be extended to more fields.
References [1] Peking University Online Judge and Its Applications, Li Wen-xin, Guo Wei, Journal of Jilin University (Information Science Edition), 2005 [2] Online judge, A Kurnia, A Lim, B Cheang - Computers & Education, 2001 [3] The Design and the Development of the Web Based Distant Collaborative Learning Platform, Mu Rangjun, Modern Distance Education, 2002 [4] Internet Collaborative Learning and the Application of CSCL, Gan Yongcheng, Distance Education in China, 2003 [5] Moodle: Using learning communities to create an open source course management system, M Dougiamas, P Taylor - Proceedings of World Conference on Educational Multimedia, 2003

Determination of the Grinding Area and the Allowance in Grinding If the electrical inductivity of the radome material is uniform and the geometric thickness of the radome wall completely meet the design requirement, the boresight error of the antenna-radome system will be the smallest and within the accuracy tolerance.
Assuming the electrical inductivity of the radome material is uniform and the geometric thickness of the radome wall satisfies the design requirement, the boresight error of such a radome will be within the tolerance.
Acknowledgement The financial support for this research by the National High Technology Research and Development Program of China under grant No.2001AA421170 and the National Natural Science Foundation of China under grant No. 59935110 is greatly appreciated.
Wang: Numeric Analysis (Huazhong University of Science and Technology Press, China 1986)
He: Journal of Capital Normal University - Natural Science Edition, Vol. 17 (1996), p. 23.

Construction of Recombinant E.coli Expressing A Thermophilic Catalase and Its Application in H2O2 Wastewater Treatment Yanhong Chang 1, a, Chunhong Shi 1,b , Yao Zhou2,c and Hui Luo 2,d* 1Department of Environmental Engineering, University of Science and Technology Beijing, Beijing, P.R.China, 100083 2Department of Biological Science and Engineering, University of Science and Technology Beijing, Beijing, P.R.China, 100083 ayhchang0512@yahoo.com.cn, bsch.22@163.com, czhouyao123@163.com, dluohui@ustb.edu.cn Keywords: Catalase; Cultivation conditions; Recombinant strains; H2O2 wastewater.
Materials and Methods A.
The Journal of Biological Chemistry, 285:19029-19034. (2010)

Because of its physical and aesthetical characters and low processing cost, wood is the most preferred building materials and interior decoration materials.
Experiments Materials In this study, poplar wood (Populous euramericaha cv.I-69/58) was taken from a plantation located in Anhui Province, China.
Table 1 The mechanical properties of wood composites Materials WPG (%) Modulus of elasticity (GPa) Bending strength (MPa) Hardness (kN) Transversal Tangential Radial Untreated wood —— 10.20 82.09 4.13 2.34 2.32 Composites 16.5 13.22 87.38 5.37 3.43 3.81 22.8 15.02 94.50 5.86 3.53 3.67 30.3 15.36 93.27 6.77 3.75 4.47 Microstructure analyses Figure 1 shows scanning electron micrographs of the composite with 30.3 WPG.
Acknowledgement This work was support by the Nature Science Foundation of China (31000272) and the Chinese Academy of Forestry Foundation (CAFINT2009C06).
Tian: Research Journal of Textile and Apparel Vol. 11, (2007), p. 27

Increased die life: Due to the low heat input of the partially solidified material the thermal shock of the die is reduced during filling.
That involves design guidelines, topology optimisation tools, available material data for FEM simulation like flow and S-N curves, casting simulation, prototype manufacturing and inhouse testing capabilities (see Fig. 3).
In this regard it needs to be taken into account that the material models for Semi-Solid casting need to be more sophisticated than for conventional casting because they need to take temperature-dependent viscosity and time-dependent shear-thinning into account.
Stumpf, The T5 Heat Treatment of Semi-Solid Metal Processed Aluminium Alloy F357, Materials Science Forum 618-619 (2009) 365-368
Bouchard, High cycle fatigue strength of permanent mold and rheocast aluminum 357 alloy, International Journal of Fatigue 32 (2010) 1233–1242

The abs spectra in the investigated temperature range, show a red-shift of the edge, as the temperature increases, as expected from the Varshni’s law [6] for semiconductor bulk and nano-materials [9].
Nevertheless the invariance of the spectrum-shape ensures that the optical properties of CeO2 nanoparticles result stable at high temperature and then they result suitable for the use in nanofluid materials.
Progress in Energy and Combustion Science 30 (3) (2004) 231–295
Solar Energy Materials 24 (1991), 210-221
Journal of Solar Energy Engineering. 122 (2000) 23-29

Experimental Materials and welding process.
Materials (AISI designation) Chemical composition (wt%) C Si Mn Cr P S Ni Mo Fe Base metal 201 0.04 0.58 7.38. 17.40 0.01 0.002 3.13 0.008 bal.
Fig.1 Microstructure of base materials (a) carbon steel (b) stainless steel AISI 201.
Kaewkuekool, B.Amornsin, A Study of Parameters Affecting to Mechanical Property of Dissimilar Welding between Stainless Steel (AISI304) and Low Carbon Steel, International Conference on Materials Science, (2008) 105-109
Lippold, Microstructure/Property Relationships in Dissimilar Welds between Duplex Stainless Steels and Carbon Steels, Welding Journal. 77 (1998) 477s-487s

The ceramic composite materials became an important candidate depending on their desirable properties, such as high hardness, high strength, high toughness, low density and low cost [1].
Experimental The CrO3 and Al powders with particle size of 43-61µm, B4C powder with particle size smaller than 3.5 µm and Ti powder with particle size smaller than 43 µm were prepared as the raw materials.
Acknowledgment This work is supported by National Natural Science Foundation of China (Grant No. 51072229 and 51202293).
Zhang, et al, Current status and development of ballistic ceramics, Aerospace Materials & Technology. 5 (2000) 10-14
Tao, et al, Experiment on ballistic property of the different steel chip-off plate and ceramic composite, Journal of Projectiles, Rockets, Missiles and Guidance. 30 (2010) 63-65.

Materials&Design, 191(2020), 108605
Materials&Design,188(2020), 108434
Materials& Design, 197(2012),109221
Materials&Design,89(2016),770-784
Materials&Design, 191(2020),108642

Early studies by Satoh [4, 5] highlight the relaxation of residual stresses in ferritic welds upon cooling, due to the volumetric material expansion that takes place as the material transforms from an austenitic (face-centred cubic) structure to a ferritic (body-centred cubic) or martensitic (body-centred tetragonal) structure.
Three hardness measurements, separated a distance of 250 μm across the weld profile, were taken at intervals of 50-100 μm from the weld cap and through the HAZ into the parent material.
Furthermore, microstructural analysis of the TG5-F sample shows remnants of parent material extending as far as 3.9 mm from the weld bead.
Further study of the austenisation kinetics is planned such that the entire transformation cycle may be predicted with only the steel chemical composition as user-defined material input.
Sun: Welding Journal (1997), pp. 451s-457s [8] J.A.