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Table 1: Geometrical Properties of the model Symbol Definition Quantity α cone apex half angle [degree] 63.43 t1 thickness of the conical head [mm] 5 t2 thickness of the cylinder [mm] 5 R radius of the cylinder [mm] 500 L length of the cylinder [mm] 488 Fig. 2 Pressure vessel with conical head Fig. 3: Distribution of circumferential membrane stress in the vessel under internal pressure [11] A FEA has been performed using the ANSYS program [12].
In addition, a bilinear hardening material model was used in the analysis with material properties elastic modulus , yield stress , Poisson’s ratio and plastic modulus . 3-Results Plastic analysis: In the plastic analysis, as it was mentioned, the large deformation theory was applied and the bilinear hardening material model was considered as well.
In this method, the variation of the Load Factor with Plastic Work has been obtained.
When the Load Factor approches 0.5, the material yielding initiates and with further increase in the Load Factor, the plastic regions develop.
American Society of Mechanical Engineering, New York (2005). [3] EN 13445.

Due to the characteristics of geotechnical materials, more complex mined-out area compared to the structure, pillar failure affected by many factors, the collapse is a very complex dynamic process, fuzzy to a certain extent, whether the selection of a calculation method or the parameters.
With the lapse of time, the mined-out area will inevitably lead to large-scale collapse due to weathering, rheology and other factors.
L will split the plane into two portions L1 and L2.The points located in L1 have such properties: .
The safety factors of pillars need not be checked because it is bound not to be damaged
Journal of University of Science and Technology Beijing, 2011. 33(2): p. 142-148. [6] Zipf, R [8] Wang Jin-an, Li Da-zhong, and Ma Hai-tao, Study of rheological mechanical model of pillar-roof system in mined-out area.

Mechanical parameters selection: In numerical simulation, different parameters correspond to different constitutive models.
Fig.8 Stratum Direction and FOS Fig.9 Vertical Displacement and Dip Direction The influence of the rock mass parameters,:Parameters of rock structure surface is one of the dominate factors in the slope stability,the properties of the rock and its surface directly affect the mechanical properties of layer blocks in bedding rock slope.
[8]LU Zengmu,CHEN Congxin,ZUO Baocheng.Experimentation research on factors influencing stability of anti-dip layered slope:Rock and Soil Mechanics, 27,(2006),p.629-633
[9]LI Haibo,XIAO Keqiang,LIU Yaqun.Factor of safety analysis of bedding rock slope under seismic load:Chinese Journal of Rock Mechanics and Engineering,26,(2007),p.2385-2394
[13]ZHAO Shangyi ,ZHENG Yingren ,SHI Weimin.Analysis on safety factor of slope by strength reduction FEM:Chinese Journal of Geotechnical Engineering, 24,(2002),p.343-346.

Accurate prediction of cutting force in elliptical vibration cutting process is not only an important basis to properly choose of cutting parameters and optimal tool geometry parameters, but also a key factor to improve the processing property of cutting.
Based on simulation analysis of the cutting force model, this paper predict the rules that vibration amplitude and angle of tool geometry affect on cutting force, which provide theory basis for choose cutting parameters and cutting tool parameter in EVC.
In this paper, through detailed analysis of elliptical vibration cutting process, the cutting force theory model is established on the analysis of several factors effects on cutting force, and the influences of elliptical vibration parameters and tool parameters on the cutting force has also be discussed.
In Eq. 12, is defined as an angle between the tangential point of resultant cutting speed and the beginning of the straight flank area, whose value area is : (12) when , it reach maximum value , the time is , and tool nose will not affected by force any more when it exit from contact.
We defined the force piecewise functions of tool edge in direction and direction are shown as follows: (13) (14) (15) (16) Effect of amplitude ratio () and rake angle () on cutting force Amplitude ratio and rake angle The cutting force is changeable during the process of elliptical vibration cutting and influenced by many factors.

Effect of Milling Time on the Properties of BYF Doped PZT Energy Harvesting Ceramics by High-Energy Ball Milling.
Besides, an important factor for desirable properties of ceramics was to control the particle size distribution and homogeneity of the powders.
The dielectric constant (K33T), the dissipation factor (tan d), the electromechanical factor (kp) with an impedance analyzer (4192A LF Hewlett Packard) at room temperature.
Electrical Properties Fig.4(a) presents the dielectric and piezoelectric properties of 0.99PZT-0.01BYF ceramics derived from various milling times.
(a-b)the electrical properties of 0.99PZT-0.01BYF ceramics derived from various milling times.

The retardation of process of combustion is a complex process that depends on several synergistically contingent factors.
The application methods and mechanism of action of fire retardants depend on the characteristics of the fire retardant and the properties of the treated material that we want to protect against the negative effects of fire.
· Fire retardants of mechanical type for example films and various claddings of non-flammable materials.
In other words, the quality and functional system of retardation consists of appropriate selection of fire retardant, its suitable application and professional evaluation of environmental conditions of the protected material, as well as external factors affecting this material.
Currently, fire hazards are associated with the use of flammable components and materials that cause loss of life, damage to property and contamination of environment.

Some factors such as conversion, particle number (Np), particle size (PS), polydispersion index (PDI) and coverage rate were examined.
It can be concluded that whether the [SDS] is above or below the CMC, the homogeneous nucleation and micelle nucleation can coexist in the system, but different factors affect the particle number.
It is concluded that whether the [SDS] is above or below the CMC, the homogeneous nucleation and micelle nucleation can coexist in the system, but different factors influence the particle number.
Synthetic properties and applications of polymer emulsions.
Preparation and property study of high-solid-content and low-viscosity P(MMA/BA/AA) emulsions.

Modeling based on Neural Network Fig. 1 Screw axis parameter optimization NN model Three factors, blade pitch, blade radius and screw axis speed, are the most important factors that affect ratio of mixture separation[8].
Due to NN quick modeling ability for complex nonlinear problem, we set up the NN model of screw axis with variable diameters and different pitches for asphalt transfer vehicle is shown in Fig. 1.The number of input neutrons depends on related factors affecting ratio of mixture separation.the three outstanding factors pitch, blade radius and screw axis speed are defined as inputs of the NN.
PSO algorithm, which is of properties of the good global searching, can effectively avoid the local minimum.
Data from the measuring position in Fig.2 have representation of complete appliance, because the structure of test apparatus is of properties of axial symmetry.
Parametric Model and Performance Simulation on the Screw Conveyor of Variable Diameters and Variable Pitches, Chinese Journal of Mechanical Engineering, pages 131-136.

This fact allows the joining of different types of metals having completely different chemical, physical and mechanical properties and avoiding, at the same time, the formation of inter-metallic phases (unwanted) that currently occur during the fusion welding process.
In the contrive and design of the FSS tool, it is very important to keep in mind the material, geometrical shape and sizes of the shoulder and pin (for the tools with a pin), depending on the properties and characteristics of the materials to join, including their thickness.
The factors that influence the amount of heat developed during the process are: the characteristics of the base metal, the diameter of the tool shoulder, the rotational speed of the tool, the travel speed of the tool and the pressing force of the tool on the base material.
For each couple of base materials (BM1 and BM2) to be soldered by FSS, harmonizing is necessary of all factors that influence the process temperature (Fig. 6).
The factors that influence the quantity and distribution of heat during the FSS process The mode to prepare, clean and place the base materials (BM1 and BM2) must also be respected.

When processing, wood-based materials – particle boards and fibreboards are predestined for forming dust particles due to their structure and lowered mechanical properties (they are fragile) comparing to natural wood [11, 12, 13, 14].
One of the basic information characterizing properties of powdered and grained materials (that is also dust) is the grain composition which is obtained by the granular analysis [15].
According to the general safety principles, an attempt of each employer at the workplace with occurring harmful factors should be: - to eliminate, - to substitute, - to reduce these harmful factors from the workplace.
We can state that they are airborne particles sedimenting in space very slowly, settling down on walls, constructions of halls and machines, affecting the organism predominantly by irritating, and as a consequence of their swirling they are a source of secondary dustiness at a workplace.
Jobbágiová: The influence of wood sample on sand wood dust properties, Dissertation, Technical University in Zvolen (2008), p. 119 [3] Information on http://www.hse.gov.uk/pubns/wis23.htm [4] P.