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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.

Effect of La2O3 on the Properties of Combustion-Synthesized Molybdenum Disilicide Jian-Ying Gao a, Wan Jiang b, Gang Wang c State Key Lab of High Performance Ceramics and Superfine Microstructure, Chinese Academy of Sciences, Shanghai 200050, China a jygao@mail.sic.ac.cn, b wanjiang@mail.sic.ac.cn, c gangwang@csu.edu.cn Keywords: SHS, MoSi2, La2O3, Fracture toughness Abstract.
However, the major problem impeding practical applications of MoSi2 is its mechanical properties.
It is believed that the SiO2 inclusions segregated mainly at the grain boundaries of the sintered body, which could be an easy crack propagation path, accordingly deteriorating the mechanical properties of MoSi2 at room temperature [3].
The factor contributing to the difference between the two samples is also the faster nucleation rate.
It has been found that the addition of La2O3 also significantly affects the thermodynamics and kinetics of combustion process, by influencing the nucleation rate during SHS.

Introduction Ti-6.0Al-2.0Zr-1.0Mo-1.0V alloy is a near α titanium alloy used in aviation and aerospace industries because of an attractive combination of mechanical properties such as the high specific strength, excellent fracture toughness and good heat/corrosion resistance.
The equivalent stress in three tracked points increases with the increasing of shear factor
Table 1 shows the effects of punch velocity and shear factor on the temperature rise.
Therefore, the punch velocity and friction affect the deformation load significantly.
Peng: International Journal of Mechanical Science Vol. 44 (2002), p. 2415-2425.

This paper will analyze the factors of safety accidents and its influence in the process of construction from four aspects of environmental factors, physical factors, personnel factors and management factors[8]
(1)Environmental factors The bad environment related projects usually have: ①Bad geological hydrology conditions.
(2)Physical factors Physical factors including the project required equipment, materials and its auxiliary facilities, the train on the existing railway line and security lights.
(4)Management factors Compared with the other factors, management factors that influence on the engineering safety is not so direct, but it is the root cause of the safety accident.
You can see many factors which can lead to the top event.

Such pressure sores disrupt every aspect of a person's life—affecting health, employment, education, and social interaction.
It is further influenced by the type, property of the cushion material and nature of loading.
References [1] Kosiak M. (1976), A mechanical testing surface: It’s effect on pressure distribution.
Human Factors. 29(5), 563-575
J Rehabil Res, 27(2):135-140 [9] Chow WW: Mechanical properties of gels and other materials with respect to their use in pads transmitting forces to the human body.

Factors affecting the hardware products quality For the quality of large number of hardware products, it mainly influences by three aspect factors, including the procurement factors, design factors, manufacturing and processing factors.Raw materials, some standard parts and external cooperation parts make up procurement factors.
The three factors consist of two three-level factors (type and defect rate).
Not non-meet properties are represented by symbol.
And the weights of other properties are obtained by using AHP.
The total value of other properties equal one except some attributes must being satisfied.

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.

The present authors investigated microstructure and properties of MAO coating fabricated on ZK60 Mg alloy in a dual electrolyte[12,13] .
From Table 4 it can be concluded that the importance order of the factors that affect the bioactive elements of coating were A, A×B, C, B in turn and the optimum combination was A1B2C3.
Liao, Effect of the change of Ca/P concentration on the mechanical properties of Ti-Alloy micro-arc oxidation coating.
Zhou, Study on the Preparation and Properties of Ti6Al4V Micro-arc Bioactive Coating.
Lu, Effects of electric parameters on microstructure and properties of MAO coating fabricated on ZK60 Mg alloy in dual electrolyte.

In ceramic/metal composites such as tetragonal ZrO2/Ni[2, 3, 4, 5], Al2O3/Ni[6, 7] have been found to show superior magnetic and mechanical properties.
Cobalt is often used as additive for TiNi phase in order to control its phase stability and related electric properties.
Mechanical and electrical properties of these composites were investigated in order to develop high performance ceramic/intermetallics composites.
Therefore, the fracture strength of 3Y-TZP/TiNi composites is supposed to be influenced by two factors.
The mechanical and electrical properties are summarized as follows

Nowadays, basal properties and durability of alkali-activated cement concrete(AAC) have been systematically studied[1-11].
Workability, compressive and flexural strength at 7d, 28d were tested according to GB/T 50080-2002《Standard Test Method of Performance on Ordinary Fresh Concrete》and GB/T50081-2002《《Standard Test Method of Mechanical Properties on Ordinary Concrete》.
This formula can supply references to predicte shrinkage of ASC, however, it’s based on the condition of identical temperature and humidity, if we apply it to actual construction, plenty of factors affecting shrinkage of ASC, like size of specimen, relative temperature and humidity, curing strength grade, load, and so on, and it’s need to modify the formula appropriatly.
Manufacturing Process and Properties of Alkali-slag Mineral Polymer Concrete [J].
Properties of Alakli-activated Compound Waste Concrete on Freeze-thaw and Abrasion Operation Together[J].