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The gas sensing and other properties of the SnO2 materials are affected by many factors.
One such important factor is the microstructure of the SnO2 materials such as their size and shape [4].
In recent years, nanocrystalline SnO2 particles have been used to improve the gas-sensing properties, because the nanocrystalline SnO2 particles have smaller size, higher surface-to-volume ratio, larger proportion of grain boundaries on the crystal surface compared with conventional materials.
Traversa, et al.: Effect of surface modification on No.2 sensing properties of SnO2 varistor-type sensors.
Liu, et al.: Photoluminescence properties of SnO2 nanowhiskers grown by thermal evaporation.

Since soil has been used as a construction material from the dawn of time, it`s unsuitable mechanical properties has been putting impediments to construction engineers to enhance its properties depending upon the required standards.
Among these factors the morphological (texture and structure) , and mineralogical composition of the material.
The properties of the fibers used in this study are summarized in Table 2.
Kenai.S, Bahar.R, Benazzoug.M Experimental analysis of the effect of some compaction methods on mechanical properties and durability of cement stabilized soil J Mater Sci (2006)41:6956-6964DOI 10.1007/s10853-006-0226-1 [3].
Pullen and Scholz, Todd V.; PhD, PE Index and engineering properties of oregon cob quinn M.

However, because of the adverse working conditions where bolt anchoring system always locate in, many factors such as erosion of underground water, defect of mortar cover and so on usually lead to bolt corrosion, then influence the performance of anchorage system.
Obviously JCR is the principal factor to affect.
In order to surmount the shortcoming above, thought of interface assembly in mechanical industry is adopted in this paper to simulate mortar cover cracking leaded by bolt corrosion.
There are three stages of mortar and rock surrounding affected by bolt corrosion.
An Experitnental studyof bond anchorage properties of bars inconcrete[J].1994, 15 (3):26-36.In Chinese [3] Zhao Yuxi, Jin Weiliang.Test study on bond behavior of corroded steel bars and concrete[J].

The dependence of the local flux on the entire specimen geometry and nonhomogeneity was considered by Larché and Cahn as a failure of local Fick's law and explained as an effect of non-local factors.
The Cu-Fe-Ni system was chosen because it is a single phase in a wide range of compositions, its thermodynamic properties are fairly well known [10] and because the tracer diffusivities in Cu-Fe-Ni alloys at 1273 K were measured [11].
The stress in the diffusion couple shown in Fig. 1 markedly affects the rate of the interdiffusion process.
Calphad denotes the Darken method with thermodynamic factor included, the Ideal alloy are computations when ai = ci.
The Young modulus significantly affects the process.

The research conducted to determine the foam’s mechanical properties (sound absorption coefficient, α) and physical properties (porosity and density) of high doping TiO2 of flexible polymer foam by increasing doped of TiO2 in the epoxy foam matrix, the reduction of α were observed but the frequency level were shifted from high to low consistently.
The number and the size of the pores are the important factors as they will influence the sound absorption mechanism [15].
Anika Zafiah: Effect of Titanium Dioxide on Material Properties for Renewable Rapeseed and Sunflower Polyurethane, International Journal of Integrated Engineering (Issues on Mechanical, Materials and Manufacturing Engineering), Vol.1 (2009), p.15-22 [4] S.
Part 2; Thermal Degradation and Materials Properties, Prog React Kinetic and Mechanism, Science Reviews, Vol. 34 (2009), p.1-43 [11] M.R.
Seddeq: Factors Influencing Acoustic Performance of Sound Absorption Materials.

Among the green polymers, polylactic acid (PLA) acid has shown to be very popular due to the good mechanical properties.
In general, the resulting composites exhibit improved mechanical properties with the addition of CNW.
The highly crystalline CNW, PLA crystallinity development (e.g., transcrystallinity) and absorbed moisture filling the free volume were put forward as the most likely factors behind this behaviour.
Bulge, tensile, and dynamic mechanical tests showed that mechanical properties of the films increased with increasing CNW content until the content reached 2.3 wt.% [14].
Sain, Mechanical properties of biodegradable composites from polylactic acid (PLA) and microcrystalline cellulose (MCC), J.

Forging is highly reliable, large production rate and presents superior mechanical properties with minimum waste of material which can be found in aerospace, automotive, agricultural and other industries.
The main variables that affect the material flow are die geometry, material properties, billet size, frictional condition at the contacting surface, processing initial condition and environment [5].
Methodology Material Properties.
The dimension of the initial billet affects the complete and incomplete metal filling in the die cavity.
In this study, the friction factor, m, was assumed to remain constant.

Keywords: Finite element analysis, coupled model of thermal-mechanical, cutting temperature forecast; temperature field simulation Abstract.
The results show that this method can efficiently simulate the distribution of temperature field of the workpiece, cutter and scraps, which is effected by thermo-mechanical coupling in metal work process.
The test method can get reliable data, but it can’t directly get the distribution of temperature field, it can only get the average temperature of a certain point (such as: artificial thermocouple method); the analytical method is also based on assumptions, it doesn’t tally with the actual situation; when the finite element method in solving the nonlinear problem caused by material properties, deformation state and more coupling field, it tends to show its unique advantages, and more close to reality, at same time, it can get accurate simulation results quickly[3].
C, n, m is material properties coefficient, in this article, the AISI1045 steel are simulated, according to the literature [6], A=553MPa，B=601MPa，n=0.234，m=1，Tmelt=1460，TTransition=20，C=0.0134，=0.001。
It can be seen from simulation result and measure values: in practical machining, cutting speed, cutting depth and feed are the factors that increase the influence for temperature field, with the increase of the three elements of cutting, the cutting temperature tends to increase.

Although the mechanical properties of BGM are being widely studied, the effect of sharp notch on the fatigue strength has not been clarified.
The stress concentration factors of the smooth specimens are 1.03 for plane-bending, 1.11 for axial-loading, respectively.
The difference of S-� properties under plane-bending and axial-loading is shown in Fig. 2, where Fig. 2 (a) is S-N curves for smooth specimens.
Then the non-propagating crack emanating from the notch root may affect the stress field.
Since the cooling rate in the casting process of the material must be changed along the thickness direction, and it is smaller at the mid-thickness region than the surface, the mechanical properties must be changed along the thickness direction.

However, the weakness of these alloys lies in its poor mechanical properties compared with wrought alloys due to microstructural defects such as porosity and segregation introduced during solidification.
This alloy has good mechanical properties having tensile strength of 513MPa and 2.5% elongation.
In order to extend the applications, it is necessary to investigate the SCC properties of the alloys.
In general, two factors are known to affect the electrical conductivity of precipitation hardened alloy.
The highest electrical conductivity in Si containing alloy can be explained by considering two electron path barrier factors together, i.e solute atom and precipitate.