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But, the optimized modification based on coherence is needed for the efficient noise reduction, since the noise level in the octave band 450Hz ~ 670Hz was raised about 3dB(A).
Piersol: Random Data Anlysis and Mesurment Procedures Ch. 5~7 (1992) [2] Nuno M.M Maia, Julio M.M.

The analysis of the data obtained with the VERSA 3D microscope (Fig. 2a) has proved the following: an interlayer of white colour is formed at the interface; the interlayer is composed of Fe2Ti and FeTi intermettallics with the hardness of 4.3 to 4.5 GPa.
This is accompanied with a reduction of hardness from 5.2 to 2.8 GPa (at 750°С) and from 3.5 to 2.6 GPa (at 850 °С).

In contrast to conventional direct current (dc) electrodeposition, a pulse electrodeposition process was used due to its significant reduction of void formation.
Due to a number of data obtained from EBSD analysis, it is impossible to present all of results and therefore Fig.1 shows, for instance, the orientation image map, the inverse pole figure and the grain size distribution under the current density 0.5A/cm2 and the frequency 340Hz.

There is a high interest in using light-weight foams for automotive, railway and aerospace applications where reduction and improvement in comfort are needed [1, 2].
According to the reference, the theoretical value and data of other researchers are 1.9, 1.79 and 1.2� 4.2[mPa·s] etc., which are smaller than the value obtained in this study.

The impedance data were analyzed by the ZsimpWin 3.10 EChem Software (Michigan, USA).
By analyzing these curves with ZSimpWin program using the Rs(Qf(Rf(CdlRt))) model (discussed elsewhere) [6], an enhancement in corrosion resistance properties after lanthanide coatings can be noted from an increase in impedance |Z|, partly due to the formation of Al2O3 layer on the matrix and partly due to the reduction in activity in the zones surrounding the cathodic intermetallics as a result of precipitation of lanthanide oxides/ Fig. 1.

It is an effective pathway to oxidize As(III) to As(V), resulting in the reduction of arsenic toxicity.
It was further characterized to be primarily composed of pyrolusite (β-MnO2) by X-ray diffraction analysis (data not shown).

Under the action of groundwater, the friction of the weak surface of the joints developed rock mass may reduce, this will lead to reduction of the rock mass strength.
A Study of the Correlativity and Data Simulation between Rock Abrastivity and Physical and Mechanical Indexes of Rock [J].

With the increase of clearance value, the stress cloud area on contact pairs is reduction.
However maximum stress of 100um clearance woven liner spherical plain bearing inner ring is 139.4MPa, which is smaller than that of 200um clearance inner ring 186.6Mpa In order to make further analysis on the stress of the woven liner spherical plain bearing inner ring, we extracted stress data on the nodes of inner ring along a path which is from the center of spherical plain bearing inner ring to contact pair surface center along the load direction.

Despite this previous research, there are several questions remaining including (a) how is the P distributed in solder alloy and dross at high and low additions and is there any advantage or disadvantage in terms of reduction of dross if P is added in Sn-Cu-Ni-Ge?
Associated with this data, a dark dross powder colour from Sn-Cu-Ni-Ge alloy in Fig. 2 may indicate SnO, while the brighter colour from Sn-Cu-Ni-Ge-P indicate SnO2.

Designing a high-performance sealing system is based on data related not only to the seal’s geometrical parameters, but also to materials, material-fluid compatibility, lubricants, geometry of the contacting surfaces and sealing dynamics.
An increase of fluid temperature results in a significant decrease of its dynamic viscosity η and consequently in a reduction of flow gap magnitude.