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Before the forecast, it is necessary to determine main factors of controlling prominent from multiple and complex factors.
Analysis of Effect Factors Currently, there are a variety of coal and gas outburst mechanism hypothesis, but degrees recognized higher as: coal and gas outburst is the result of the combined effects of the physical and mechanical properties of the ground stress, gas and coal [3,4].
Methane Diffusion initial velocity is related to coal gas content, the pore structure and surface properties.
Coal consistence coefficient reflects the physical and mechanical properties, and is one of the important parameters affecting the coal and gas outburst.
In actual production, the main factors are consistent with above result.

The size and consistency of magnetic particles are also influencing factors of ferrofluid properties.
One of the key factors affected on the performance of ferrofluid is proper proportion between reacted materials.
The main influencing factors on properties of ferrofluid in preparation processing are reaction speed, reaction temperature and interactant ration which are the controlled factors for ferrofluid properties.
Fig. 6 The effect of Fe3+, Fe2+ molar ratio on saturation intensity of kerosene based magnetic fluids Moreover, reacted temperature, dropping speed of ammonia liquor, pH value of solution and adding surfactant are other factors affecting on properties of ferrofluid during the preparation procedure.
Saturation magnetization, density and viscosity are critical factors affected on properties of ferrofluid which is unique with fluidity and magnetism.

Creep Stress Analyses Affected by Load Properties on P91 Pipe with Local Wall Thinning under High Temperature XUE Jilina ZHOU Changyub PENG Jianc School of Mechanical and Power Engineering, Nanjing University of Technology, Nanjing 210009, China aemail:jilinxue@126.com; bemail:changyu_zhou@163.com; cemail:joepengjian@163.com Keywords: High Temperature; Stress Analyses; Creep; Local Wall Thinning; Load Properties; Finite Element Analyses (FEA) Abstract.
Then, the stress and strain of pipes with local wall thinning affected by load properties were discussed.
The results indicate that creep stress and creep strain increase with load properties.
In this paper, creep stress and creep strain affected by load properties have been analysed, which include three groups: monotonic internal pressure, monotonic moment and both internal pressure and moment.
Here, maximum loading factor is applied, i.e. k=1.

Citation & Copyright (to be inserted by the publisher ) Coupling recrystallization and texture to the mechanical properties of ferritic stainless steel sheet C.
Obtaining optimal mechanical properties for highly formable ferritic stainless steel sheet requires careful control over recrystallization and texture.
The important mechanical properties for formability (e.g. the yield strength and r-value) are thus strongly dependent on the final few percent recrystallization.
In this study, it has been attempted to correlate the microstructure and texture of ferritic stainless steel sheet to its mechanical properties as measured in uniaxial tension.
Evolution of Mechanical Properties: r-value.

This paper designed Poplar LVL production experiments under different process conditions, and measured the mechanical properties of poplar LVL specimens under different experimental conditions.
The results showed that, it is feasible that grey theory is used to analyze the influence level of production technology of poplar LVL on the mechanical properties.
Investigations show that, mechanical properties and engineering performance of LVL are affected by many factors such as wood species, veneer thickness and quality, processing variables, member size, in service environment and loading types [1-5].Different factors have different influence levels on the mechanical properties.
So it is feasible that grey relational analysis is used to analyze the influence level of production technology of poplar LVL on the mechanical properties.
This paper only had grey relational analysis of the influence level of four factors on the dynamic shear modulus, the grey relational analysis of the influence level of other factors on the other mechanical properties remain further study.

Most of present studies on strength properties of PPTA paper-based materials just consider one single factor, lacking of overall system factors analysis.
The factors, hot pressing temperature(X1), hot pressing pressure(X2), proportion of PPTA short-cut fiber(X3) and beating degree of PPTA-pulp(X4) were selected as experimental factors and the strength properties(tensile index (YT), wet tensile index (YW)) as the response values.The factors and levels were shown in Table 1.
Table1 Analytical factors and levels for RSM Factors Level Low (-1) Zero (0) Up (1) Hot pressing temperature X1[℃] 125 155 185 Hot pressing pressure X2[ MPa] 0.5 1.5 2.5 Proportion of PPTA short-cut fiber X3[%] 15 45 75 Beating degree of PPTA-pulp X4 [°SR] 25 36 47 Results and discussion The regression equations of the strength properties of PPTA paper According to the experimental design, 29 times experiments of 4 factors and 3 levels were carried out, the design and results of RSM experiment were shown in Table 2.
Studies have shown that PPTA paper’s mechanical properties can be improved by hot-pressing process [10].
Properties of new printed circuit board base materials [J].

Study on the CMP Pad Life with Its Mechanical Properties Pei-Lum Tsoa , Zhe-Hao Huang, Sheng-Wei Chou and Cheng-Yi Shihb Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu, Taiwan, R.
In this paper, we investigated the physical properties of the CMP pad such as compressibility, thickness, and surface roughness.
From the observed non-uniformity of pad properties, the reason could be due to the non-uniformity in pad conditioning.
Therefore, it is necessary to change the conditioning strategy to improve the uniformity of pad properties.
The pad surface roughness and thickness may influence the material removal rate directly, and the uniformity of both the roughness and thickness are significant factors of CMP with-in wafer uniformity. 2.

Mechanical Properties of HPC and Numerical Simulation of Mine Shaft under 3D Load Hui Cao1, a, Lin-lin Jiang2,b 1 Beijing Polytechnic College.
The mechanical properties of high-strength concrete was studied in the laboratory, and obtained a high strength concrete uniaxial compressive strength changes with curing period, found that low temperature curing C100 Poisson's ratio of concrete is 0.24, and elastic modulus reached about 52.5GPa.
Mechanical Properties of High-strength Concrete Test Preparation of High Strength Concrete.
Many factors affect the elastic modulus of concrete, all affect the strength of almost all the factors affect the elastic modulus.
Numerical Study of Mechanical Properties of Concrete by the Shaft Separate Reinforced Concrete Model.

Recrystallization and Mechanical Properties of Hot Rolled Seamless Steel Tubes T.
Values of mechanical properties are an average value from three tensile tests.
Table 2 Comparison of calculated and measured structural and mechanical properties.
Obtained values could by affected by: - interval of validity of used material constants, - evaluation methodic of ferrite grain size, - factors with influence on tensile test (local temperature and structure heterogeneities), - incomplete static recrystallization between stands (Fig. 3).
Summary Mathematical model of structure and mechanical properties was applied on tube hot rolling.

Examination of coating physical properties were repeated after one, two and three years of ageing.
Morphology of the epoxy coating surface layer after three years of ageing Ageing of epoxy coatings under the influence of climatic factors did not affect their Buchholtz hardness (Fig. 5) which was favourable to stability of coating resistance to mechanical factors action like, for example, hits of erosive particles.
Kotnarowska: Influence of ageing on mechanical properties of epoxy coatings, Advances in Corrosion Protection by Organic Coatings.
Kotnarowska: Influence of mechanical factors on surface state of acrylic coatings with nanofillers.
Wojtyniak: Influence of Ageing on Mechanical Properties of Epoxy Coatings.