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Bao[1] pointed out that excessive noise of the factory workshop affects the physical and mental health , reduces work efficiency, and causes disease and even accidents.
Mei[6],which mainly includes finite element design, optimization design, computer aided design, mechanical reliability design, and so on.And, modern design method has been used in the fan noise reduction.
Meng[13] studied that the non-steel fibre could enhance vibration and noise performance of friction material in frequency domain and time domain and mainly discussed the material of damping coefficient and other factors impacting on vibration and brake noise.Z.G.
Zhong: Leaf Mechanical Pneumatic Acoustic Translation Essays(beijing:China Machine Press,China,1987) (In Chinese) [4] S.M.
Zhou: Mechanical Vibration and Noise Learn (Beijing:Science Press, China 2004), p.246 (In Chinese) [16] G.Q.

Since 20th century, many scholars have studied the biological body surface non-smooth surface field, finally indicated: The biological body surface has the many kinds of shapes the geometrical non-smooth structure, The various spots of the same animal body surface presenting geometry non-smooth shape are also quite different[2] The so-called non-smooth surface refers to a smooth surface at least exists in some direction causes the non- smooth effect macroscopic region surface, it exists in the system affects cuts to resistance each kind of factor.
Its mechanism is mainly to lie in that common non-smoothness property.
Wear-resistant of the non-smooth surface and its applications According to the biological evolutionism, the biology will be affected or stimulated by outside forces in the course of growth, and those outside forces may not be symmetrical or across-the-aboard cover the surface of the biology.
It is the development direction of mechanical sealing elements in the future to bring the hermetic surface into non-smooth.
Table-1 notes the experimental data of the lives and average mechanical drilling speeds of different drilling bits.

The size, range, payload capacity, and applications are some other factors that further differentiate the drones.
Moreover, the number of rotors also affects the payload capacity of a drone.
Farmers can map the affected region to find other parts of the field that may need more care, such more irrigation or fertiliser.
Use of drones in the private properties is a big threat to privacy.
Increase in the payload affects the battery life and flying range drastically.

Due to the limited space of this manuscript the details of the laser gas nitriding and also properties of titanium alloy Ti6Al4V (Grade 5) are described in [2, 11, 12].
Bonek, The investigation of microstructures and properties of high speed steel hs6-5-2-5 after laser alloying, Arch.
[9] Yu-Chi Lin et al., The effect of different methods to add nitrogen to titanium alloys on the properties of titanium nitride clad layers, Materials and Design. 54 (2014) 222-229
Szczepanik, et al., Hybrid artificial immune system in identification of room acoustic properties, Inverse Problems in Science and Engineering, Taylor & Frances, 2013
Musztyfaga, et al., Application examples for the different measurement modes of electrical properties of the solar cells, Arch.

Therefore, comparing concrete mixes with different mechanical properties only makes sense within the whole structure.
If the user enters the concrete strength class according to EN 1992 [1], the values ​​of the mechanical properties given in EN 1992 are automatically used for the calculation.
However, it is also possible to enter custom values ​​of mechanical properties.
This can be used, for example, for high-strength concrete, which mechanical properties are not given in EN 1992.
In case of entering custom values ​​of mechanical properties, the concrete composition must be also entered.

Glass ceramic bodies with superior physical, chemical and mechanical properties came from a vitrified mixture of which the dust to ash ratio was 1:9 undergoing heat treatment at 900 oC for 5 hours.
Fractions of ZnO and Fe2O3 were varied from 0-3 wt% and 0-25 wt%, respectively to determine how they affected oil spot formation.
Compositions of the glaze directly affected the mechanism of spot evolution.
Thickness is one of the important factors for oil spot formation [8-9].

However, due to the complicated generation factors, a unified understanding about the occurrence mechanism and condition of rock burst has not been formed among researchers.
So it is widely used on the research of basic properties, dynamic response, and crack growth of rock material [13-17].
Meso-scale mechanical parameters are used to characterize the physical properties of particles in PFC3D.
Meso-scale mechanical parameters can only be obtained by varying them until the macro mechanical parameters of the numerical sample match that of the laboratory rock sample.
In addition, other meso-scale mechanical parameters are set to default values.

Heat treatment can modify its properties, reducing water-induced expansion and enhancing stability for dynamic system applications.
Honeycomb monoliths offer advantages, including reduced pressure drops, improved mass efficacy, and compelling physical and thermodynamic properties [21].
The study primarily focused on characterizing the adsorbent's mechanical properties, particularly compressive strength and pressure drop.
The analyses were essential for understanding how changes in pressure affect the adsorbent structure.
Notably, in terms of mechanical properties, bentonite exhibited higher compressive strength, reaching a maximum of 16.3 MPa, in comparison to zeolite.

These core factors have influence on the microstructure and properties of HEA.
High entropy alloys always possess many wonderful properties, such as high hardness, good wear resistance and corrosion resistance.
AlFeCoNiCuCr and AlCoCrNiMo HEA coatings have been prepared successfully, and their microstructure and properties have been investigated.
Effect of alloying elements on microstructure and properties of multiprincipal elements high-entropy alloys.
Microstructures and properties of high-entropy alloys.

The main advantage of dispersed fuel elements is that their thermophysical and mechanical properties are mainly determined by the properties of the matrix material, and the most of fission products are retained in the fuel particle.
Despite of the good irradiation resistance of alloys, as well as the high thermophysical properties of dispersed fuel elements, it has not been possible to fully realize the potential of metallic fuel.
/cm3s) weakly affects to the temperature at which the thermal contribution becomes significant.
However, the values of the pre-exponential factor depend very strongly on this choice of degree m.
[24] Meyer M.K., Hofman G.L., Properties of U–Mo Alloy dispersion fuel, IAEA Technical Committee on the Development of High Density Uranium – Molybdenum Dispersion Fuels, Vienna, Austria, June 2003.