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Its properties as a transducer include: wide frequency range of 0.001 Hz to 9-10 Hz, low acoustic impedance of close match to water, human tissue and adhesive systems, high elastic compliance and voltage output that is 10 times higher than piezo ceramics for the same force input, high dielectric strength, mechanical strength and impact resistance, and high stability on resisting moisture, most chemicals, oxidants, and intense ultraviolet and nuclear radiation [4,5].
Interfacial shear strength (IFSS) between fiber and matrix is one of the important factors in controlling mechanical performance of polymer composite materials.
Piezoelectric properties are induced by high dielectric properties based on chemical structure.
Thickness of PVDF sensor does not seem to affect on the sensing and thus thinner sensor might be desirable for the embedding
From the results of FFT analysis, the frequency for PZT was dissimilar to PVDF sensor case due to different sensor material's properties.

Premature mechanical failure can occur due to fretting even when the applied loads are well below structural design limits.
Applied normal load, slip amplitude, frequency, contact geometry, surface roughness and material properties are the main parameters that affect the fretting wear response [2].
For Isotropic hardening model, plasticity is simply expansion of the yield locus by the same factor in all loading directions.
The material properties assigned to the geometries is of titanium alloy, Ti-6Al-4V.
The elastic modelled are Young's modulus of 115 GPa and Poisson's ratio of 0.342.The plasticity properties of the titanium alloy, Ti-6Al-4V is as shown in the Table 1 [8].

The main probable factors of its formation at each technological stage of production are established.
Khilko [1], is interpreted as a threat to the deterioration of the quality of the environment, damage to humans, populations and groups of living organisms, due to the presence or potential of harmful natural and anthropogenic factors.
It is the accumulation of waste that has become one of the most significant factors in environmental pollution, with a negative impact on all its components [7, 8].
The issue of emergency stop of the production process at an oil extraction plant, as one of the factors of ensuring environmental safety, was discussed in O.
According to the results of the monitoring of the state of ecological danger, private joint stock company “Kropyvnytskyi oil extraction plant” identified the main probable factors of its formation. 3.

The accumulated experimental data [2] confirm evident relation between crystalline structure of a matter and various physical-chemical properties.
An important factor, which affects the efficiency of the grinding process in VVM mill is a gap between the top layer of balls and a cover of a grinding chamber, which depends on the degree of filling a chamber with balls.
Shock-vibrating loading results in certain changes in crystalline lattice in terms of crystalline, physical, chemical, and mechanical parameters factoring into changes in various processes such as dissolving and leaching.
Experimental data confirms the fact that there is practically linear dependence between a change in lattice parameter and floatation properties of mineral particles.
Thus, changes in lattice parameters helps consider the deviation of surface properties of natural materials comparing to purely chemical compounds.

Under suitable climatic conditions cross-ventilation represents energy-efficient alternative to mechanical cooling.
The speed of the outdoor air flow is another key factor in determining the cooling capacity.
Prevailing wind often changes with the night period, but it may also vary throughout the day, affecting the cross-ventilation and its capacity for cooling.
The length of the tube is a function of the required cooling capacity, tube diameter, and other factors affecting the cooling, such as: local soil conditions, soil moisture, and the depth of the tube as well as other specific factors, such as vegetation or cooling by evaporation.
Technically, louvres can be optimized by increasing its dispersion reflective properties of its outer side to the degree of reflection ≈ 70% (highest light transmission) and by gray coloring of the inner side (reduction of brightness and glare) to the degree of reflection ≈ 25% at emission rate ε = 0,9.

The main constituents of coatings remain invariant and the coatings have excellent properties of bond strength and thermal shock resistance.
Heat collection, heat storage and evapour production are the main factors in the system of solar thermal power generation.
MoB/CoCr coatings have properties of good corrosion resistance, heat resistance and wear resistance in the aluminum alloy [5,6].
Also, structures and properties of coatings are studied.
And there also existed certain mechanical bond between bond coating and substrate.

Modification of thermophysical properties for liquid coolants by adding some solid particles is the main subject of nanofluids.
Several important factors such as the type, shape and size of nano-particles, and temperature of the nanofluids have not been studied widely.
Thermo physical Properties of the Nanofluids.
The selection process and determination of nanofluid thermo physical properties is a important area in nanofluid applications.
The single-phase method is chosen to calculate the thermo physical properties of nanofluids.

Aqueous polyurethane plays an important role in the mechanical properties of the film and the film forming process.
In order to optimize the formulation and coating process of coating glue, five factors were chosen, two quadratic regression orthogonal rotation combinations was applied to design this experiment.
Through the analysis it can be shown that the main factors of Y1 are flame retardant agent and aqueous polyurethane weight ratio, drying temperature and drying time.
The main factors of the breaking elongation (Y3) were coating thickness and drying time.
As can be seen from table 3, washing times did not affect the flame retardant properties within 10 times.

Introduction Epoxy resin (EP) were widely used in electric devices owing to their good dimensional stability , chemical resistance, electrical insulation and excellent mechanical properties.
Through on the rheological properties of the resin matrix can predict the viscosity of the resin system changes during the curing process.
Zou et al[3]. reported that applied the ANN to simulate the mechanical properties of the composite foam.
Sun et al[4]. has finished the work about predict the mechanical properties of wood composite with application of ANN.
In the initial stage of the reaction ,the cuing degree is low, the temperature is the main factors influence in the system viscosity.

These structural transformations can notably influence the component mechanical properties.
Various factors make that the determination of these critical values (or diagrams) has to be partly experimental: the Cr activity in complex alloys is unknown, the alloying elements greatly affect the properties of the oxide layers as well as the relative stability of the metallic carbides, and the sub-surface alloy composition is time-dependent.
The dissolution of the initial carbides degrades the creep properties of carbidehardened alloys.
The carbon transfers between GCR helium and metallic surfaces can thus be detrimental to the alloy mechanical properties and any carburising or decarburising environment must be avoided.
The alloy performance then relies on the oxide properties.