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Optimization Analysis for Key Component of a Precision Optical Aspheric Grinding Machine Shuming Yang*1,2, Yukun Xu1, Lin Yang1,Shilong Liu, Huiying Zhao, Xingyuan Long , Zhuangde Jiang 1State Key Laboratory of Mechanical Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an, 710049, China 2State Key Laboratory of Digital Manufacturing Equipment & Technology, Huazhong University of Science and Technology, Wuhan, 430074, China * shuming.yang@mail.xjtu.edu.cn Keywords: high precision machine tools; finite element method; optimization; grinding machine; optical aspheric Abstract: Manufacture of ultra-precision micro-structured freeform surface relies on the high precision of machine tools.
Introduction Optimization design is a field of engineering that uses optimization technique methods to search for the optimal design.
Precision Engineering, 1989, 11(4) [2] Shan Dongri, Han Yuhua.
The finite element analysis on static and dynamic performance for the welded-structure column of a certain horizontal machining centre[C]. 2010 2nd IEEE International Conference on Information Management and Engineering, Chengdu, China, 2010:372-376
Journal of Materials Processing Technology, 2001, 113: 178-183.

Enhanced Piezoelectric properties of Barium Titanate Single Crystals by Domain Engineering 〇Koichi Yako, Hirofumi Kakemoto,Takaaki Tsurumi, and Satoshi Wada Department of Metallurgy and Ceramics Science, Graduate School of Science and Engineering, Tokyo Institute of Technology,2-12-1 Ookayama,Meguro-ku,Tokyo 152-8552 Keywords: d33 piezoelectricity , engineered domain , barium titanate, single crystal , domain engineering ABSTRACT Engineered domain configuration was induced into barium titanate (BaTiO3) single crystals, and the d33 piezoelectricity was investigated as a function of domain size.
INTRODUCTION In ferroelectric single crystals, high performance of piezoelectric properties appears by domain engineering.
These ultrahigh piezoelectric properties were originated from one of the domain engineering techniques, i.e., "the engineered domain configuration"[5-6] "Engineered domain configuration" technique uses the anisotropy of the ferroelectric single crystals. [7-8] BaTiO3 crystal is one of the typical lead-free ferroelectrics.
Tsurumi: Key Eng.
[11] EMAS-6100: Standard of Electronic Materials Manufacturers Association of Japan (1993)

Fatigue Failure Analysis on Key Components of Bladder Accumulators Yaping Niu1,a*, Bingbing Chen2,b 1Technical Development Department, Ningbo Special Equipment Inspection Institute, Ningbo 315048, China 2College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China a*goodlife_me@163.com, bchenbb@zjut.edu.cn Keywords: bladder accumulators; fatigue failure; finite element method.
Fatigue failure analysis on key components of bladder accumulators was conducted.
By simulation using the finite element method, it was detected that the peak stress of the key components applied on the contact surfaces.
Which illuminated the flash burn increased the brittle of the local material and induced the crack initiation.
Calculated according to the linear elastic, the Young's elastic modulus of the material is 2e+5MPa, the Poisson's ratio is 0.3.

To the question of the breakup of the space target impacted by projectile, an engineering model is developed.
Summary Based on the satellite characteristic and the hypervelocity impact theory an engineering breakup model is deduced.
Xu, “Satellite Engineering”, Beijing: China Aerospace Press, 2002
Schaefer, “An engineering fragmentation model for the impact of spherical projectiles on thin metallic plates”, International Journal of Impact Engineering,Vol. 33, pp. 745-762, 2006
International Journal of Impact Engineering, Vol. 23, pp. 295-306, 1999

However, this approach proved to be too complicated for engineering applications.
This version of the LA is aimed at solving engineering problems; therefore it was called the “engineering” version of LA.
This is one of the challenges for physics and mechanics of fracture of irradiated materials.
A function to describe the temperature dependence of number of the crack nuclei in the “characteristic” volume is a key element of the engineering version of LA.
Markov, Structural materials of nuclear power plants.

Reverse Engineering The reverse-engineering technology calls the self-examination technology or the reverse engineering.
Reverse Engineering mainly includes Reverse Engineering of images, Reverse Engineering of software and Reverse Engineering of machines, etc.
Nowadays, most study on reversing engineering focus on material object reversing Refactoring [1].
Cad model (curve and curved surface) technology is a key technology of reverse engineering[2] . 3.
Journal of Advanced Materials Research, Vol. 33-37(2008) , p.745 [5] Information on http://zh.wikipedia.org… [6] Ma Tieli: Smoothing of the point cloud processing of curves and surfaces in the body reverse engineering applications.

Based on the grey relation analysis of ecological composite wall seismic performance research Yin Zhang1, a, You Han1,b and Shuai Liang1,c 1School of Civil Engineering, Xi'an University of Architecture and Technology, Shanxi, Xi'an, 710055, China azhangyyt@xauat.edu.cn, bhanyou_good@126.com, c404507026@qq.com Keywords: Grey correlation; Ecological composite wall; Seismic performance; Key parameters.
Introduction The ecological composite wall structural system [1] is a kind of product ,which is adapt to the wall materials innovation of our country.
The main characteristic of it is the using of new material, new structure and new technology.
Discuss four kinds of the ecological composite wall bearing capacity of the ecological composite wall with standard curve, the relationship between the selection so that more conducive to the performance of the structure wall body construction, has guiding significance for practical engineering.
For practical engineering problems for flexible collocation, the specific requirements for selecting a reasonable design and construction of the ecological composite wall structure.

The demands made on structural composite materials in modern design are increasingly stringent.
Understanding Structural Integrity (SI) provides the key to the successful design, certification, and safety of large composite structures and engineering composite materials.
Using these tools to determine constitutive equations relies on knowledge of the rules of materials behaviour.
Special issue of the Journal of Materials Science, Volume 41, Number 20, October 2006 (ISSN 0022-2461).
Special issue of the Journal of Materials Science, Volume 43, Issue 20, October 2008 (ISSN 0022-2461).

Diving support for offshore oil engineering is an important assurance.
Underwater engineering need supported by diver. 2 Engineering key point 2.1 Engineering and construction method Figure 1 the main construction method of Subsea pipeline Figure 1 shows the main construction condition of Submarine pipeline.
Accumulated experience for offshore engineering diving support and helium oxygen mixture diving engineering practice.
China Offshore Oil and Gas(Engineering),China,Vol03,1994
[2] Zhao Dongyan, “Application of Flexible Pipe in Bohai Submarine Pipelines” Doctoral Dissertation of Materials in physics and chemistry (professional), Shanghai metallurgical research institute of the Chinese academy of sciences, 2000

On the Mechanism and the Rate of Sub-ground Erosion in the Loess Material Xi An LI 1, a, Qiang XU 2,b, Hong Zhou LIN 1,c Wan Jun YE 3,d 1 College of Geology Engineering and Geomatics, Chang’an University, Shanxi Xi’an: 710054, China 2 The National Laboratory of Geo-hazards Prevention and Geo-environment Protection, Chengdu: 610059, China 3 Xi’an University of Science and Technology, Shanxi xi’an 710054, China adclixa@chd.edu.cn, bxq@cdut.edu cn, clinhz03@gmail.com dyewanjun2004@126.com Keywords: Mechanism; Sub-ground erosion; Critical condition; rate of tunnel-erosion.
Sub-ground erosion often resulted in severe problems in various engineering constructions, most of which is due to the sub-erosion in loess.
The key factors considered in the test include soil density as well as the initial water content.
In many cases, the lower side erosion acts as a key reason for the gravity erosion.
On the origin of hidden holes in loess and its hazardous effects on the highway engineering [Ph.