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The imposition of a controlled residual stress distribution is well known to significantly improve the mechanical properties (namely strength and toughness) of glasses, glass-ceramics and ceramics.
The use of residual stress to improve the mechanical properties of a brittle material normally involves the formation (by physical or chemical means) of compressive stresses in a finite layer on the surface, compensated by balancing tensile stresses in the interior of the material.
Factors affecting the apparent fracture toughness in a laminate: σa is the applied stress; σr is the residual compressive stress; a is the crack length.
Materials properties of Si3N4 and Si3N4 + TiN composites.
Mechanical properties at room temperature.

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.

Measured values can be affected i.a. by the energy of random effects or other, less important components of the signal.
In the paper the author describes the method of minimization of the impact of disturbances on signals being analysed using basic properties of autocorrelation function.
These are not the only properties of these functions.
In addition, this function value depends on several other factors such as influences of random and non-linear effects.
However, the effectiveness of this analysis for real systems can be only obtained when properties of these functions are combined together.

The shape and the percentage of the coarse aggregate are the key factors in the mesoscale numerical simulation.
Introduction Numerical simulation is a typical method in analyzing the mechanical behavior of concrete.
In general numerical simulation, concrete is usually assumed to be a homogeneous material with homogenized material properties derived from standard concrete specimen tests.
From these figures, it can be found that the crack pattern is affected by the coarse aggregate size and position.
From the numerical simulation, it can be found that the aggregate shape does affect the concrete crack patterns.

The paper introduces current researches of the work hardening in metal cutting process, analyses the forming mechanism and influencing factors of the work hardening and discusses the effects of the work hardening on workpiece service performance.
Influencing Factors of Work Hardening in Metal Cutting Due to work hardening is the result of the comprehensive effects of plastic deformation strengthening and softening of temperature rise, therefore, usually whatever factors can increase deformation and friction may force the hardening.
On the other hand, whatever factors is conducive to the softening, such as high temperature, or low melting point, can reduce the degree of hardening.
Influence of the Workpiece Material Properties.From the point of view of the physical properties of the workpiece material, the greater the workpiece material plasticity is, the greater the hardening exponent is, and the more serious the hardening is.For general carbon structural steel, the less the carbon content is, the greater the plasticity is, the more serious the hardened layer is.
The work hardening is affected by workpiece material properties, cutter parameter and cutting conditions in machining.

Because the process of blade in electrochemical machining(EMC) can be effected by many factors, such as blade shapes, machining electrical field, electrolyte fluid field and anode electrochemical dissolution, different ECM machining parameters maybe result in great affections on blade machining accuracy.
Being a non-mechanical metal removal process, ECM is capable of machining any electrically conductive materials with high stock removal rates regardless of their mechanical properties, such as hardness, elasticity and brittleness.
All machining parameters involving electrical field distribution, electrolyte flow field and electrochemical dissolution characteristics may affect the stability of ECM and shape accuracy.
According to the basic principle of ECM, electrolyte conductivity is mainly affected by two factors, electrolyte temperature and electrolyte bubble rate.
If we consider the two factors together, the value of at position along electrolyte flow direction can be impressed as (11) From (6) to (11), is conductivity temperature coefficient; current density; electrolyte density; electrolyte flow rate; specific heat of electrolyte; volumetric electrochemical equivalent of hydrogen gas; correction factor of hydrogen gas; resistance coefficient of electrolyte flow; hydraulic diameter; According to (11), the at position along electrolyte flow direction can be calculated precisely.As mentioned above, the most important EMC process parameters are applied voltage, tool feed rate, electrolyte temperature, electrolyte pressure and ECM initial gap.

Theoretical analysis and experimental research on the ray trajectories, assembly situation and polarized properties of light were carried out.
In this paper, a 3D FEM has been established to analyze modulation depth in many aspects such as structure, prism material, assembly craft and polarized properties.
By using the finite element method, the practical refractive index change and the propagation properties under the continuous varying stress could be obtained.
The analysis of output light’s characteristic is mainly concentrated in polarized properties.
Polarized light properties analysis.

The main causes of the abnormal foetal heart beats: tachycardia (mother's temperature, medicines, premature foetus, foetal anaemia and hypovolemia, imminent hypoxia and chronic acidosis, birth in pelvic presentation); bradycardia (excessive uterus activity, the rapid labour progressing, advanced pregnancy age, congenital heart block); prolonged decelerations (excessive uterus activity, maternal low blood pressure, maternal origin placenta affecting, the compression and prolapse of the umbilical cord, abruptio placentae regional anaesthesia).
Six factors which influence the thermal comfort and belong to the personal ones, as well as to the environment ones, were identified.
Environment factors: air temperature; radiant temperature; air speed; humidity.
Personal factors: clothing insulation, heat produced by the metabolism.
As a strategy of accomplishing the equipment for identifying and monitoring the personalized information, the following textile structure variants were chosen: - structures which are woven and/or knitted from yarns properties specific for ensuring the physiologic comfort, used as a flexible support for the sensor attaching; - structures which are woven and/or knitted from HiTech fibres with conductive properties.

The properties of the materials used are shown in Table 1.
Properties of the powders used.
Processing and mechanical properties of PM processed Fe– Cu–Co alloys.
Antisari, Structural and Thermodynamic Factors of Suppressed Interdiffusion Kinetics in Multicomponent High-entropy Materials, Phys.
Angel, Effect of copper on the mechanical properties of alloys formed by powder metallurgy, Materials and Design, 58 (2014) 12-18

Factors affecting coal seam water effects are follows: wetting properties of liquids, coal gas pressure and internal gas pressure on coal, cracks and pores of the degree of development and injection parameters.
Electrostatic precipitator dust removal efficiency is high, but the installation requirements are strict, need to consider the dust properties, installation conditions and economic cost.
The main factors of affecting the efficiency of ventilation dusting are the properties of wind speed, mineral dust density, particle size and so on.
Conclusion In view of the relationship between numerous dust control technology and the physicochemical properties of dust, the paper does testing and analysis of dust around the working face before making dustproof job.
It is necessary to test and analyze the nature of true density, specific surface area, dispersion, surface tension, contact Angle, the optical properties, wettability and charged, etc.