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Application of Rough Set Feature Selection in the Hazard Assessment of Debris Flow LI Ju1, a, CHANG Jinyi1,b , WANG Xing2, WU Xiaobiao1 1 School of Computer Science and Engineering, Chang Shu Institute of Technology, Changshu, Jiangsu, China 2College of Atmospheric Sciences, Nanjing University of Information Science & Technology, Nanjing, Jiangsu, China aliju@284532@163.com, bchangjy@cslg.edu.cn Key words: rough set; debris flow,attribute reduction,value reduction Abstract.
The importance of property In decision-making system , is defined as In decision-making system , the attribute importance of is defined as Application of Rough Set Theory in Debris Flow Hazard Assessment The selection of data and discrete data This attributes were selected from a debris flow, a: The maximum amount out of; b: Drainage area;c: Main channel length;d:Watershed relative height; f: Cut density;g: Maximum rainfall; h: Loose solid material reserves; D: Risk Level Table 1 No. a b c d f g h D 1 8.99 50.0 9.00 2.82 15.61 100.41 7000 1 … … … … … … … … … 4 0.17 21 1.92 1.06 5.11 40.21 11.11 2 Table 2 No. a b c d f g h D 1 1 1 1 2 1 2 1 1 … … … … … … … … … 4 0 0 0 0 0 0 0 2 Calculate posC(D): U/{a}={{1,3},{2,4}},U/{D}={{1,3},{2,4}},U/{b}={{1},{2,3,4}},U/{c}={{1},{2,3,4}},U/{d}={{1},{2,3,4}},U/{f}={{1},{2,3,4}},U/{g}={{1,2},{3},{4}}U/{h}={{1,3},{2,4 }},U/{C-a}={{1},{2},{3,{4}},U/{C-b}={{1},{2},{3},{4}},U/{C-c}={{1},{2},{3},{4}},U/{C-d}={{1},{2},{3},{4}},U/{C-g}={{1},{3
The decreasing order of importance of attribute:a=g=h>b=c, the impact of the maximum amount out of, maximum rainfall, loose solid material reserves on decision outcomes is greater.
References [1] Major J J.and Iverson R M.Debris-flow deposition:effects of pore-fluid pressure and friction concentrated at flow margin[J].Geological Society of American Bulletin,1999.111(10): 1424-1434 [2] Hungr O.Analysis of debris flow surges using the theory of uniformly progressive flow[J].Earth Surface Processes and landforms,2000,25:483-495 [3] Gregoretti C.The initiation of debris flow at high slope:experimental results[J].Journal of Hvdraulic Research,2000,38(2):83-88 [4] Tamotsu Takahashi.Debris Flow.Published for International Association for Hydrautic Research by A.A.Balkma.Rotterdam Brookfield.1991 [5] Allen P A.Earth Surface Processes[M].Victoria:Blackwell Science Limited,1997.

Table 2 denotes the material parameters and elements of the cam and the pin gear.
Table 2 Material properties and elementof fe model Part Element Meterial EX(N/m2) DENS(kg/m3) PRXY Cam, Pin gear plane183 45# steel 2.09×1011 7.8×103 0.269 The contact pin number is variable when meshing, so that it is needed to refine the mesh in contact area.
Acknowledgment The authors thank National Natural Science Foundation of China (Grant No. 50905127), Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20091208120002) and Tianjin High School Science & Technology Fund Planning Project (Grant No. 20080405) for the financial supports that make this research possible.
Huang, and B.J.Lin．Geometric Design of Roller Gear Cam Reducers．Journal of Mechanical Design, ASME, 1999, 121(1):172-175 [2] Figliolini G., Rea P., Angeles J.
,Analysis of a spiral bevel gear’s tooth contact stress, Mechanical science and technology for aerospace engineering, 2007, 26(10): 1268-1272

Introduction Conductive wire insulation material is a combustible organic mixture, overcurrent may transform electric energy of conductor into thermal energy, in case of local overheat of conductor and insulation material reaching a certain temperature, fire disaster will be caused.
Test In this test, 2.5 mm2 PVC insulated wire (hereunder abbreviated as BV wire, of which the rated current at 30℃ is 30A) is connected to self-made KSL-1000 model of large current generator, so that different high-multiple overload currents (3Ie, 3.5Ie, 4Ie, 4.5Ie and 5Ie) passes through, stacking, wrapping and going-through mode are adopted to put paper scrap, absorbent cotton and fire-retardant pipe in contact with wire, with the increase of overload time, observe the change of insulation material of wire and ignition conditions of these materials.
Journal of Guangxi University (for Natural Science) 2006，（9）：48-53
Changchun: Jilin Science and Technology Publishing House, 2005：76
Fire Science and Technology, 2009, 28(7):543-545

Magnesium alloys are the lightest, widely used structural material.
Materials for the research Two magnesium casting alloys with the addition of rare earths elements constituted the materials for testing: QE22 and RZ5, with no modification of the chemical composition and with 3 variants of modifications: according to the MEL specifications, +50% and +100%.
Acknowledgment The present work was supported by the Polish Ministry of Science and Higher Education under the research project No 6ZR7 2009C/07354.
Mizera, Microstructural stability and creep properties of die casting Mg-4Al-4RE magnesium alloy, Materials Characterization 60 (2009) 1107-1113 [4] Y.M.
StJohn, The effect of zirconium grain refinement on the corrosion behaviour of magnesium-rare earth alloy MEZ, Journal of Light Metals 2 (2002) 1–16 [8] P.

One of the tasks of modern materials science in the field of ceramics is the creation of effective resource- and energy-saving technologies for the production of materials with certain properties.
Buruchenko, The Possibility of using secondary raw materials for construction ceramics and sitalls, Bulletin of the Tuva state University, Technical and physical-mathematical Sciences. 3(18) (2013) 7-14
Vereshchagin, Ceramic thermal insulation materials from natural and man-made raw materials, Building material. 4 (2000) 34-36
Kryvokolinska, New insulation materials using technogenic raw materials, New research in materials science and ecology. 8 (2008) 50-52
Stolboushkin, Influence of wollastonite additive on the structure of wall ceramic materials from man-made and natural raw materials, Building materials. 8 (2014) 13-17

A very strong {111}<110> peak type annealing texture is obtained in the tested material which resulting in extremely good deep drawability.
The tested material is cold rolled 75% reduction ration.
Acknowledgement This work was supported by the National Natural Science Foundation of China under Grant No.50901054 and the research fund for Wuhan Iron and Steel research institute.
References [1] D.Vander, N.Yoshinaga and K.Koyama., ISIJ International 36(1996)8:1046-1054 [2] Y.Nagataki, ISIJ International 36,1996,4:451-460 [3] J.X.Li, Z.Y.Liu, et al., Journal of Materials Processing Technology167(2005)132-137 [4] K.
Materials Science and Engineering A527(2010)1882-1890

Journal Citation (to be inserted by the publisher) Copyright by Trans Tech Publications Fabrication and characterization of nanocomposites reinforced by carbon nanotubes - (2) Testing of mechanical properties Nyan-Hwa Tai1,a, Meng-Kao Yeh 2,b, Jia-Hau Liu2,c , Chien-Hsin Yang1,d 1 Department of Material Science, National Tsing-Hwa University, ROC 2 Taiwan Power Research Institute, Taiwan Power Company, Taipei, ROC a nhtai@mse.nthu.edu.tw, bmkyeh@pme.nthu.edu.tw, cshulin002002@yahoo.com.tw, d chyangt@tsmc.com Keywords: carbon nanotube, nano-composites Abstract.
Among these applications, carbon nanotube reinforced polymeric composite is one of the most promising materials for high technology application in advanced materials.
Science, 292 (2001), 706-709 [5] C.A.
[10] Composite Materials: Engineering and Science, F.L.

Introduction In recent years, nanostructured nickel (Ni) have found many applications in catalyst, magnetic material, conductive paste, battery, surface coating material, superalloys, solid lubricant and so on due to its novel properties[1].
Experimental Materials.
No other peaks are observed, indicating that there are no nickel oxides or other crystalline materials formed under the present experimental conditions.
Acknowledgements This work was partly supported by the National Natural Science Foundation of China (No.21003065), Natural Science Foundation of Jiangsu Province (BK2010166), Industry High Technology Foundation of Jiangsu (BE2010144) and Project of Jiangsu University (09JDG062).
Vol.15 (2007), p.1316 [3] Guoyong Huang, Shengming Xu, Gang Xu, Linyan Li,, Songzhe Chen: Chinese Journal Of rare metals.Vol.31(2007),p.66 [4] D.W.

High-temperature oxidation resistance of austenitic stainless steels LI Dong-sheng1,*, Li Dan1, Dou hong2,GAO Pei2, LIU Yu2, Xiaojun Chen3, Xinchun Jiang3, Pei Jing-juan4 1School of Material Science and Engineering, Jiangsu University, Zhenjiang 212013, China 2Jiangsu Yinhuan Precision Steel Tube Co Ltd, Yixing 214203,China 3Wuxi Jiangnan Cable Co Ltd, Yixing 214251, China 4Yixing Economic and Information Technology Commission, Yixing 214203,China *dsli@ujs.edu.cn Key Words: austenitic stainless steel; high temperature oxidation, oxide scale； Abstract: The oxidation kinetic curves of four kinds of austenitic stainless steel at 700℃ was measured by weighting method.
Materials and Methods We prepared four kinds of austenitic stainless steel for this experiment.The sample of Super304H[1] and 800H[2-3] are melted based on ASME and 304Mn and 800Al are melted by ourselves.
Chemical composition of the samples is shown in table 1. the materials processed into 30 mm×15 mm×5 mm samples after heat- treatment.
Materials Science and Engineering A, 452–453(2007)665–672 [3] L.
Journal of Iron and Steel Research, 2009，21（10）：43-47

This article needs to process decision-making part feature classification, mainly divided into: (1) Auxiliary information characteristics; (2) geometric characteristics; (3) Accuracy characteristics; (4) material characteristics.
Table 1 STEP and C++ data type mapping table STEP neutral file data types C++ data types INTEGER int REAL double ENUMERATION enum LIST array STRING string (2) Add a secondary feature information As part STEP203 feature information provided can not fully express generate parts plus the data needed to process the information, that is, in less than a neutral file to extract information (eg: materials, design name, tolerances and other information) the use of artificial additives to form part plus craft required information
Fig.5 Parts feature information extraction （3）Add auxiliary information Adding auxiliary information related to the design process, the main part materials, bulk and design personnel (Figure 6)
Acknowledgment This research was sponsored by Heilongjiang province education department natural science and technology item (11531036) and Excellent Academic Leaders Project of Harbin science and technology innovation talents of special fund (2013RFXXJ064).
Journal of Materials Processing Technology, Vol. 125 (2002), p. 446-455 [3] Xuesong Guan.