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Herringbone gears are extensively used in numerous engineering applications including gearboxes.
Chemical compositions of the materials were analysed.
Design errors include such things as improper gear geometry, wrong materials, poor material quality, inadequate lubrication system, and several others.
Rajadurai: Engineering Failure Analysis, Vol. 13 (2006), p. 1285 [5] J.R.
Darwish: Effect of Heat Treatment on Fatigue and Toughness Properties of Steel, Final Research Report No. 2/426 (2006), College of Engineering, King Saud University.

Cassar: Advanced Engineering Materials Vol.11 (2009), p.533
Evans: Industrial & Engineering Chemistry Research Vol.39 (2000), p.654
Kim: Key Engineering Materials Vol.288-289 (2005), p.677
Kim: Key Engineering Materials Vol.342 (2007), p.845
Alderson, Journal of Aerospace Engineering Vol.221 (2007), p.565

Study On Relationship Between Building Material And Building Form Chunyan Guo1, a, Dake Wei2,b and Chunying Guo3,c 1School of Civil Engineering, Northeast Forestry University, Harbin, Heilongjiang,150040, China 2School of Architecture, Harbin Institute of Technology, harbin, Heilongjiang,150001, China 3Urban Planning Society of China, Peking 100037, China agcy_nefu@126.com, bwdk_hit@126.com, cguocy@planning.gov.cn Keywords: Building Material, Building Form, Structure Stress, Making Technique, Artistic Appearance.
This method is a return to the essentials of building, and a key direction for building innovation.
With a close cooperation between architects and structure engineers, an accurate consumption of material and layout is possible according to the mechanic calculation.
The roof structure of International Terminal, Waterloo, designed by Nicholas Grimshaw Partners and Anthony Hunt Engineering Partners, is a typical model for form developed by employing structural force diagram.
In modern architecture, exposed structure is preferred to decoration, which requires the material shall reflect the structure and component property, which is a key idea of modern architecture aesthetics, profoundly influencing the application of building materials [4].

In addition, in Europe and the USA, the standards for V2G technology have been conducted by International Organization for Standardization (ISO), European Telecommunications Standards Institute (ETSI), and Society of Automotive Engineers (SAE).
In 2011, Wu and Zhou [10] proposed a fault-tolerant and scalable key management for smart grid, which combines symmetric key technique and elliptic curve public key technique.
Only valid EVi and aggregators have the corresponding secret keys to compute the session key.
Tseng, Applied Mechanics and Materials, 145 (2012), pp. 364-368
Tseng, Applied Mechanics and Materials, 284-287 (2013), pp. 3380-3384

Py-GC-MS Analysis on Extractives of Phyllostachys pubescens for Biomedical Engineering WU Feng-juan, PENG Wan-xia, ZHANG Zhong-feng, MA Qing-zhi School of Materials Science and Engineering, Central South University of Forestry and Technology, City Changsha, P.R.
China a correspondent authors’ e-mail: pengwanxi@163.com Key words: Health risk; Py-GC-MS; Extractives; Phyllostachys pubescens; Biomedical engineering Abstract.
Introduction Phyllostachys pubescens, which was a superior resources and industrial raw material forest, was used as the raw materials of furniture, doors, flooring, beams, and so on [1].
Materials and Methods Materials.
So the benzene-alcohol extractives of Phyllostachys pubescens could be used for biomedical engineering .

Such a kind of analysis can be used both in theoretical consideration of material engineering problems and in the chemical industry.
Introduction Random packings of spheres have many reflections in materials science.
Real materials, such as oxides or sulfides, include at least two elements with atoms of two different sizes.
In spite of the great importance of the problem for materials engineering, only general algorithms have being proposed; they give satisfactory approximations in some selected cases.
Lalena, Principles of Inorganic Materials Design: John Wiley & Sons, (2010)

It is to strengthen design of tunnel water ecological implementation, including the optimization design of tunnel lining structure, lining the choice of waterproof materials, ecological environment protection under conditions of controlled drainage design.
Therefore, for the realization of the effective management tunnel water with ecological protection technology in arid and semi-arid regions, engineering of policy and regulation system of research methods and the tunnel technical route should be made; tunnel engineering management system innovation, system innovation, policy innovation are proposed; From three respects : the tunnel engineering design , tunnel construction and tunnel engineering management to build perfect law and policy system of tunnel engineering.
Acknowledgements The project by the Lan Zhou JiaoTong University of Environmental and municipal engineering and civil engineering college is responsible for the completion.
Thanks for civil engineering college in Lan Zhou JiaoTong University provides structural experiment center of Gansu Province Key Laboratory of the Ministry of railways, roads and bridges and Underground Engineering Key Laboratory, Lan Zhou JiaoTong University lab and other professional laboratory, for this project required subject intersection and concrete structure related research content to provide the solid technical equipment guarantee.
Chinese Journal of rock mechanics and engineering, Vol. 24(1) (2005), p. 121-127.

The interest of this approach is shown discussing its application to few examples of engineering interest (composite materials, masonry structures, bone tissue).
The design of properly engineered materials is a challenging issue from both technological and theoretical point of view.
On the other hand, reliable theoretical and numerical tool are needed to make accurate predictions on the properties of an engineered material.
In particular, it is well suited to deal with materials with rigid microstructure [14-16].
Such a description is well suited for materials like masonry and many short fiber composites.

Thinking Innovative Approaches and Materials Innovative Practice Qingshan Li1, 2, a, Wei Hong1, b, Jing Sun3, c, Jun Liu1, d, Wei’an Yu1, e, Zhubai Liu2, f and Guangzhong Xing1, g 1National Key Laboratory of Metastable Materials Preparation Technology and Science, Yanshan University, Qinhuangdao, P.R.
Based on the theoretical system of innovation thinking and practice base of research, innovation and expansion of scientific thinking, thinking, innovative technology, science, innovative thinking, environmental studies, engineering, innovative thinking, innovative thinking, art, thinking, innovative pedagogy of understanding.
Materials physics, chemistry can guide the synthesis of new materials research.
Change the chemical composition of materials can increase the basic types of materials, changing materials and properties.
Preparation of new materials to reduce cost is to achieve industrial production and practical application of the key.

Research on the key technology of laser engraved image Shaoqing Zhang1, a, Dongmin Zhang1, b, Quanhua Feng1, c School of Mechanical Engineering, Shanghai Institute of Technology,Shanghai China aZhangshaoqing123@yeah.net, bdmzhang@sit.edu.cn, c946152050@163.com Keywords : Laser engraving, Image processing, Process parameters.
Fig. 3 Image gray preliminary processing (2)Image bitmap output: 300 pixels/inch, halftone screen frequency 96 lines per inch, angle: 45 °, shape: round; output image pixel is important, characteristics of different materials is not set the parameters according to different materials and the results that you want to be, go through several tests, summarized the appropriate settings.
Laser engraving technology The performance of different materials, carving scheme adopted will be different.
Engraving process parameters selection is the quality assurance of carving,there are many factors affect the quality of laser engraving, after repeated experiments, summarize the following points: (1) Materials Different materials absorb the energy different, lens together to the workpiece of laser energy can’t all be absorbed.Thickness of carving, carving directions, materials, texture and other factors are taken into account
Computer Engineering and Design ,2009, 29(23): 6041-6043