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Mahmood1,2,d 1Dept of Mechanical & Materials Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia 2Centre for Automotive Research, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia 3Foundation of Technical Education, Baghdad, IRAQ alaihasan@yahoo.com, bshahrir@eng.ukm.my, crozli@eng.ukm.my, dwmfaizal@eng.ukm.my Keywords: CFD, Turbocharger, Centrifugal Compressor, Vaned Diffuser.
Roger, Dougal, Dynamic centrifugal compressor model for system simulation, Journal of Power Sources. 158 (2006) 1333-1343
Tamaki, Effect of piping systems on surge in centrifugal compressors, Journal of Mechanical Science and Technology. 22 (2008) 1857-1863
Journal of Turbomachinery. 126 (2004) 473-481
Mahmood, numerical simulation of flow inside a modified turbocharger centrifugal compressor, Asian Journal of Applied Sciences. 5, 8 (2012) 563-572.

Analog materials are generally composed by aggregate, binder, layered materials and retarder.
Layered materials are mica.
Type of aggregate and binder mixture may be formed of similar materials with different properties.
According to the known geological information and rock mechanical parameters, selected suitable similar materials to do the ratio test.
Coal Science & Technology Magazine, 2011,1:6-8[In Chinese]

Bilingual-Teaching Model of Automatic Control Theory Teaching Materials.
Two-thirds of them prefer the English materials supplemented by Chinese handouts for reference.
More importantly, they are now able to lead their self-learning on the English materials.
Second, not all the students could completely understand their English learning materials.
Study on Bilingual Teaching of Automatic Control Theory, Journal of Changchun University of Science and Technology 2009; 3:500-504, in Chinese

Introduction Bronze-bonded diamond grinding wheels are applicable to grinding of ceramics, glasses and hard and brittle materials; their application is more and more widespread.
Acknowledgements This project is financially supported by the Natural Science Foundation of People's Republic of China under Grant No.50005005, the Natural Science Foundation of Hunan Province under Grant No.05JJ3009.
Radhakrishnan: International Journal of Machine Tools & Manufacture, Vol.35 (1995) No.5, pp.661-671
Deng: Chinese Journal of Lasers, Vol.32 (2005) No.3, pp.431-435
Ohashi and D.Yagi: Journal of the Japan Society for Precision Engineering, Vol.63 (1997) No.8, pp.1153-115

Furthermore, the quantity of materials is sometimes limited, for instance, in the case of Irradiation Assisted Stress Corrosion Cracking (IASCC).
Shibata: 10th international conference on environmental degradation of materials in nuclear power system-water reactor, NACE, USA (2001) [2] M.
Shoji: Journal of Nuclear Mater.
Saito: Journal of Nuclear Mater.
Saito: Journal of Nuclear Mater.

This system has constructive advantages such as high load-bearing capacity, high stiffness and ductility, ease of transportation and assembly, and full usage of the capacity of the materials.
The capacity of the system depends on the effectiveness of shear connectors during the transfer of stress between materials.
The application of CFS sections in composite floor systems with concrete slabs has emerged as an alternative to optimize the full use of materials and has been the focus of recent research.
In this sense, it is necessary to verify the connection mechanism between the two materials to guarantee the stress transfer.
PCI Journal (2000). 46-75

Materials had low density by 3D printing resulting.
Experiment Raw materials ABS, PA-757H.
Materials Science and Engineering：A. 301(2001)125-130
Materials and Design. 32(2011) 3448-3456
Nanofiber-reinforced polymers prepared by fused deposition modeling, J.Journal of Applied Polymer Science, 89(2003) 3081-3090.

Patyk, Three Dimensional Finite Element Simulation of Sheet Metal Blanking Process, Applied Mechanics and Materials 474 (2014) 430-435
Bagci, 3-D numerical analysis of orthogonal cutting process via mesh-free method, International Journal of Physical Sciences 6 (2011) 1267-1282
Dargusch, SPH/FE modeling of cutting force and chip formation during thermally assisted machining of Ti6Al4V alloy, Computational Materials Science 84 (2014) 188-197
Patyk, Problems Determining of the Mechanical Properties of Metallic Materials from the Tensile Test in the Aspect of Numerical Calculations of the Technological Processes, Applied Mechanics and Materials 474 (2014) 454-459
Silberschmidt, FE/SPH modelling of orthogonal micro-machining of f.c.c. single crystal, Computational Materials Science 78 (2013) 104–109

Optical glass (BK7) and microcrystalline glass (GC1) are selected as the experimental materials.
For brittle materials, if the average grain size of the diamond wheel, grinding parameter and coolant are selected appropriate, the grinding will be performed in the ductile mode of the brittle material.
Table 1 Mechanical performance of partial optic glasses and micro-crystalline Materials H [Gpa] E [Gpa] Materials H [Gpa] E [Gpa] FCD1 3.38 79.58 F3 4.31 57.33 BK7 4.75 63.70 GC1 9.50 130 LaC12 5.78 93.88 GC2 9.40 130 Fig.10 AFM image of the grinding Fig.11 AFM image of the grinding surface of BK7 surface of GC1 Fig.12 Photos of the machined aspheric surface part Conclusions Based on the above analysis and experiments, some conclusion can be obtained: 1.
Acknowledgements Author gratefully acknowledges Heilongjiang Province Natural Science Foundation and the Harbin City Science Foundation of China Heilongjiang Province for their Support of this work: The contact number is E0218 and 2002AFXXJ046.
Dong: Journal of Materials Processing Technology Vol. 129 (2002), p. 91

Introduction With the development of modern science and technology, construction has put forward to higher requirements on concrete strength, durability, etc.
As a new material, waste fiber recycled concrete has aroused the attention of most researchers.
Experiment Design and Introduction Experiment materials.
Acknowledgement The authors wish to thank Chinese National Natural Science Fund (No. 51178275) and the Planned Science and Technology Project of Shenyang, China (F11-165-9-00) for sponsoring this research project.
Experimental research and calculation analysis of concrete fracture characteristics [J].Journal of water conservancy, 1998(8): 61- 68