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Decision Method of Processing Scheme for Part Surface with Constraint Condition Based on T_invariant of Fuzzy Petri Nets Wei Yue Xiao1,a, Fei Yu2,b 1College of Mechanical Engineering,Hunan University of Arts and Sciences,Changde 415000,China 2Mads Clausen Institute, University of Southern Denmark, Sonderborg 6400, Denmark aXiao0736@gmail.com bxlinsherley@gmail.com Key words：Petri net；T_invariants；manufacture constraint；process plan；CAPP Abstract.
A 50 ◎ f 0.015 A 0.4 Material: 45 Heat-treatment: HRC40~45 Æ98h6( 0 -0.022) pm0 t1 pm1 t2 pm2 t5 pm5 t3 pm3 t6 pm6 t8 pm7 t7 tv1 tv2 Figure 2 The part of which the excircle to be processed Figure 3 The simplified model for alternative process plans for the part in Figure 2 t1 t2 t3 t5 t6 t7 t8 tv1 tv2 pm0 pm1 pm2 pm3 pm5 pm6 pm7 From the Definition 2, the incidence matrix C7´9 is obtained as below: The equation C • J = 0 in Definition 3 is used to calculate all T_ invariants so as to get the solutions of three T_ invariants (the calculation process is omitted): J = (t1 ,t2 ,t3 ,t5 ,t6 ,t7 ,t8 ,tv1 ,tv2)T J 1=(1 ,1 ,0,1,0 ,0 ,0,1,0) T J 2=(1 ,1 ,1,0,0 ,1 ,0,0,1) T J 3=(1 ,1 ,0,0,1 ,0 ,1,0,1) T Three process plans for processing the excircle surface of the machinery parts shown in Figure 3 can be obtained basing on the processing places corresponding to the transition of which the component is 1 among the 3
Baykasoglu: Linguistic based meta-heuristie optimisation model for flexible job shop scheduling．International Journal of Production Research Vol. 40, pp. 4523-4543 (2002) [5] P.
International Journal of Computer Integrated Manufacturing Vol. 15, pp. 28-36 (2002)

The material tested is SUS304 austenitic stainless steel with chemical compositions of 0.06%C, 0.38%Si, 1.52%Mn, 18.62%Cr and 8.18%Ni.
The thin-walled tubular specimens of 22mm outer diameter, 1mm wall thickness and 30mm parallel part length were cut from the bar material of 50mm diameter solution-treated at 1323K.
S is a material dependent parameter and defined by correlating uniaxial test data and cyclic torsion.
Tani: submitted to Journal of Materials Science, Japan Vol.56 (2007) [5] K.

Preparation of Conductive PPy/cellulose Composite Fabric by using admicellar polymerization Hui-ting Yanga, Li-juan Wang b* Key Laboratory of Bio-based Material Science and Technology, Northeast Forestry University, Harbin 150040, PR China a yhuiting@tom.com, bdonglinwlj@163.com Keywords：：：：Polypyrrole, Cellulose, Admicellar, Conductive fabric Abstract：：：：Conductive PPy/cellulose composites were prepared with flax substrate by using admicellar polymerization.
Materials and Methods Materials Pyrrole (Kefeng, Shang Hai, China) were purified by vacuum distillation and kept cool in the dark before use.
Journal of Applied Polymer Science2004; 92, 2629-2636.

Lithium Niobate is a ferroelectric material with a high Curie temperature (Tc=1210 ºC) [1-2] and it is widely used in optoelectronic devices [3-4].
The starting materials were tetraethylorthosilicate (TEOS), lithium nitrate (LiNO3) and niobium chloride (Cl5Nb).
Sombra, Canadian Journal of Physics, 75 (1997) 747-758
Sakka, “Treatise on materials science and technology”, vol 22, Academic Press, 1982.

Typical S-N life curve [2] is usually formulated as Nf i Sim = C (2) where m and C are material (structural) dependent parameters determined by experiments.
Variable Filtering Threshold according to Equal Damage Principle As well known, most structural materials have their "fatigue limits" [2] below which the small load cycle would not cause any fatigue damage.
Journal of Applied Mechanics�1945�12:159-164 [2] W.
Jacobs and Tromp, Flight simulation on notched elements, NLR TR 74033, 1974 [7] C.Bleuzen, T.Pardessus, Crack propagation for engineering materials under variable loading condition, in Fatigue crack growth under variable amplitude loading, edited by J.
Petit, Elsevier Applied Science, June 1988, Paris, France � ��� ��� ��� ��� � ��� ��� ��� ��� load level��� filtering threshold��� 1W
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Oil-impregnated paper is a very reliable insulation material, because the cavities of the fibrous paper are entirely filled with oil, hence any air bubbles within the insulator are excluded [10].
Mohd Basri Wahid et al., in: Malaysian Standard: Palm Oil-Specification (Second Revision), (2007) [4] Suwarno Aditama, “Dielectric Properties of Palm Oils as Liquid Insulating Materials : Effect of Fat Content”, IEEE Proceedings of International Symposium on Electrical Insulating Materials, Kitakyushu, Japan, 5-9 June (2005) [5] Endah Yuliastuti, “Analysis of Dielectric Properties Comparison Between Mineral Oil and Synthetic Ester Oil”, Master of Science in Electrical Engineering Thesis, Delft University of Technology, (2006) [6] F.
Babadagli, “Fluid-fluid Interaction during Miscible and Immiscible Displacement under Ultrasonic Waves,” The European Physical Journal, B, 60, 447-462 (2007) [16] Hossein Hamidi, Erfan Mohammadian, Roozbeh Rafati, Amin Azdarpour, “A Role of Ultrasonic Waves on Oil Viscosity Changes in Porous Media,” IEEE Conference on Clean Energy and Technology (CEAT). (2013)

Slag and Porosity Defective Region Identification in Welding Images Using Computer Vision Techniques Ratnavel Rajalakshmi1,a*, Sivasankaran S.2,b, Abhinav Basil Shinow1,c, Giridharan Abhimannan3,d , Boopathy C.4,e 1School of Computer Science & Engineering, Vellore Institute of Technology, Chennai, India 2HCL Technologies Ltd., Chennai, India 3School of Mechanical Engineering, Vellore Institute of Technology, Chennai, India 4ACB Technologies, Chennai, India arajalakshmi.r@vit.ac.in, bsivasankaran12@gmail.com, cabhinavbasil.shinow2019@vitstudent.ac.in, dgiridharan.abimannan@vit.ac.in, eamsak2019@gmail.com Keywords: Welding, Defect Identification, Image processing, Thresholding, Binary Blob Abstract.
Materials and Methods The GDXray [1] dataset is a publicly available dataset that can be used for research and educational purposes.
The X-ray images were taken by BAM Federal Institute for Material Research and Testing, Berlin, Germany.
Journal of Nondestructive Evaluation 34.4 (2015): 1-12
Materials Evaluation 62.11 (2004): 1142-1147

Introduction Carbon/carbon (C/C) composites are attractive materials for a wide range of applications due to their excellent high temperature properties, such as low thermal expansion coefficient, high thermal stability, and high retention of mechanical properties at high temperatures [1].
Model Development In this work, MTS as precursor material, hydrogen and argon as carrier gas and diluting gas are pumped into CVD reactor, and SiC was deposited on C/C composites.
Acknowledgement This work has been supported by the National Natural Science Foundation of China under Grant No. 90716024 and the "111" Project under Grant No.08040.
Buckley, in: Carbon-carbon materials and composites, edtied by J.
Song: Journal of Xi'an Jiaotong University Vol. 41 (2007), p. 1070 (in Chinese)

Introduction As technology progresses,in the fields of aviation, spaceflight, military and civil purpose, aspherics devices have played a very important part in the essential equipments ，such as the pick-up head that equiped by the reconnaissance satellite ， the telemicroscope that employed by celestial observation, the optical reflector and the microscope that used by medical sciences, etc, they all have the needs of using high-accuracy aspherics device [1].The adoption of aspherics device in optical system have the advantage of improving picture element, simplifying the system, reducing dimension and weight of system.Yet,the utilization of aspherics device is retarded for its much more difficult manufacture than the sphere device's.
The resection rate of material means the resectable material in unit time, is represented by Zw （mm 3/s）.
Zw and Zs are related with material itself, action velocity, the grinding force between the grinding wheel and the piece's contact area and temperature, etc. and change with the normal grinding force proportionally probably.
Dong: Journal of Materials Processing Technology, (2002), pp.91

Introduction Zirconia ceramics have received great attention as engineering ceramics and catalysis materials because of their unique mechanical, electronic, thermal, and optical properties.
The precursors were prepared by the molar ratio of metal ion and oxalic acid, the mass ratio of ball and material, rotational speed and the milling time were 1:1.5, 3:1, 150rpm and 3h, respectively.
Alpha alumina was used as reference material in DTA experiment.
Acknowledgements This work was financially supported by the 211 Project of Guangdong Province under Grant (412110904), by the National Natural Science Foundation of China under Grant (51002034), by the Combination of Industry, Academic studies and Scientific research project of Guangdong Ministry of Education under Grant(2009B090300186).The authors would like to thank these offices.
Yin: Journal of Molecular Structure Vol. 690(2004), p. 181-187 [9] S.