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The risk chain, a common technical tool for analyzing risks, is used for analyzing the relationship between risk factors and losses [5].
Actually, security risk chain is a framework for analysis which includes security risk factors, environments for security risk factors, the mutual effects between security risk factors and the environment, the results of the effects, and the consequences resulting from the results.
On the first hand, large public buildings are a complex system with the feature of various factors, randomness, nonlinearity, fuzziness.
One security risk factor may cause the change of other factors and even the change of the whole system.
Second, optimizing construction technologies and selecting reasonable safety factors.

Bao[1] pointed out that excessive noise of the factory workshop affects the physical and mental health , reduces work efficiency, and causes disease and even accidents.
Mei[6],which mainly includes finite element design, optimization design, computer aided design, mechanical reliability design, and so on.And, modern design method has been used in the fan noise reduction.
Meng[13] studied that the non-steel fibre could enhance vibration and noise performance of friction material in frequency domain and time domain and mainly discussed the material of damping coefficient and other factors impacting on vibration and brake noise.Z.G.
Zhong: Leaf Mechanical Pneumatic Acoustic Translation Essays(beijing:China Machine Press,China,1987) (In Chinese) [4] S.M.
Zhou: Mechanical Vibration and Noise Learn (Beijing:Science Press, China 2004), p.246 (In Chinese) [16] G.Q.

The J/V characteristics were performed soon after preparation of the complete devices to avoid any change in the photoelectric properties caused by age.
It is well known that, the increase in spin coating speed of the sol-gel solution for preparation of ZnO films tends to decrease film thickness and, therefore, tends to change optical, structural and other properties of ZnO film as stated in many literatures [22-24].
Therefore, the observed variation in device performance parameters, as shown in Fig. 7, may be attributed to a variation occurred in film thickness and other its properties with increasing spin coating speed of the ZnO layer.
Mehra, Effect of thickness on structural, electrical, optical and magnetic properties of Co and Al doped ZnO films deposited by sol-gel route, Appl.
Sahdan, Influence of Spinning Speed on the Properties of Sol-Gel Spin Coated ZnO Films, Advanced Materials Research 970 (2014) 115-119

In this paper, superplastic properties of 1933 aluminium alloy were evaluated and the effect of hot ECAP on grain refinement and superplasticity was investigated.
Compared with original samples annealed at 400°C, the superplastic elongation of samples processed by ECAP for 4 passes increases by a factor of 130% about, and the range of superplastic temperature varies from 140°C to 210°C.
Moreover, the alloy with fine-grained microstructure usually exhibits excellent physical and mechanical properties.
It is also seen that the microstructure of clamping head (no deformation, only affected by heat) of sample is coarsened than the microstructure (Fig.1 (b)) of original forged block of 1933 alloy remarkably and grains are distinctly more homogeneous (Fig.4 (b)).
Concerned about actual productivity and microstructure, properties of pressed samples, ECAP processing for 4 passes at 300°C is recommended in this paper

TiO2 is a semiconductor that possesses superior chemical and physical properties, widely used in various fields.
In sonochemical synthesis, it is necessary to analyze several factors so that the particles formed are uniform with a narrow size distribution.
Kovač, Photocatalytic properties of TiO2 and TiO2/Pt: A sol-precipitation, sonochemical and hydrothermal approach, Ultrason.
Manaf, Enhanced dielectric properties of Nanocrystalline Ba(1-x)SrxTiO3(x=0 and 0.3) ceramics, in: IOP Conf.
Esquivel, Self-cleaning of SiO2-TiO2 coating: Effect of sonochemical synthetic parameters on the morphological, mechanical, and photocatalytic properties of the films, Ultrason.

Good optical properties: This paper can also down more than 80% about the usage on visible sunlight and its reflectivity is very low.
An increase in reflectivity is adversely lower the transmittance to affect the image quality.
The transparency of visible light and infrared ray on the transparent substrate is also affected by light reflection, penetration, absorption, scattering and other factors.
The good workability of PMMA sheet has made it easy to be thermo-formed (including mold pressing, blow molding and vacuum forming) in any shapes and mechanical processed such as turning, drilling, cutting and so on.

Introduction Many factors affect rail performance and one of the most important is the residual stress [1].
Orringer, How residual stresses can affect rail performance, in: J.J.
Richardson, M.J Wood, Control of straightening operations for optimisation of product properties.
Proc. 39th Mechanical Working and Steel Processing Conference, Vol. 35.

Introduction The influence factors of size effect.
Fly ash is levelⅠ, whose property parameter is also shown in table 2.
Acknowledgment The author would like to thank the Research Project on the Connecting Mechanical Properties of Components and Parts and Construction Technology of the Prefabricated Maintenance System (2012BAJ16B04-03) for the financial support.
Experimental study on size effect of compressive strength and Deformation properties of large size fly ash concrete.
The properties of concrete.

Jeyakumar2,b and B.A Saravanan3,c 1Assistant Professor, Department of Mechanical Engineering, PSNACET, Tamil Nadu, India 2Professor, Department of Mechanical Engineering, PSNACET, Tamil Nadu, India 3Professor, Department of Mechanical Engineering, SREC, Tamil Nadu, India apsgowtham36@yahoo.com, bkmk_jai@yahoo.com, cba_saravanan@gmail.com, psgowtham36@yahoo.com* Keywords: Wire Electrical Discharge Machining (WEDM), Dry-process, Process parameters, Applications, Future scope Abstract.
Process parameters affect the output result in the machining. 3.1 Material Removal Rate (MRR) The material removal rate (MRR) is one of the major performance measures to control the mach inability of material.
They optimized the GRA with Fire fly algorithm and using one-time factor approach.
The exhaustive report shows the information feature, factors probable to drive and challenges in the growth market.
[2] Ibrahem Maher, Ahmed A.D Sarhan & M.Hamdi, Review of improvements in wire-electrode properties for longer working time and utilization in wire-EDM machining, Int.

Since 20th century, many scholars have studied the biological body surface non-smooth surface field, finally indicated: The biological body surface has the many kinds of shapes the geometrical non-smooth structure, The various spots of the same animal body surface presenting geometry non-smooth shape are also quite different[2] The so-called non-smooth surface refers to a smooth surface at least exists in some direction causes the non- smooth effect macroscopic region surface, it exists in the system affects cuts to resistance each kind of factor.
Its mechanism is mainly to lie in that common non-smoothness property.
Wear-resistant of the non-smooth surface and its applications According to the biological evolutionism, the biology will be affected or stimulated by outside forces in the course of growth, and those outside forces may not be symmetrical or across-the-aboard cover the surface of the biology.
It is the development direction of mechanical sealing elements in the future to bring the hermetic surface into non-smooth.
Table-1 notes the experimental data of the lives and average mechanical drilling speeds of different drilling bits.