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Compared with the traditional mechanical gyroscope, fiber optic gyroscope has the advantages of high reliability, small volume, high tolerance for shock and vibration, wide bandwidth, good linearity and low cost, which makes it evolve from a pioneering physics experiment to a practical device rapidly since it has been demonstrated in 1976 [1].
A FOG is composed of fiber optical sensors and electric circuits, both of which can affect the performance of FOG (such as bias, scale factor, random drift, dynamic range, etc.).
The preamplifier should satisfy the properties of low noise, high gain and wide bandwidth.
Fig.5 Output signal of FOG To test the dynamic range and the nonlinearity of scale factor, the corresponding experiment is conducted in the turntable.
The output result shows that the nonlinearity of scale factor is less than 100 ppm in a broad dynamic range.

Titanium and its alloys are considered the gold standard for bone contact implants due to their suitable mechanical properties and biological performances.
Among these coatings, diamond-like carbon (DLC) has emerged as a promising material due to its superior mechanical and tribological properties, chemical inertness and stability.
Palin, Bacterial adhesion mechanisms on dental implant surfaces and the influencing factors, International Journal of Adhesion and Adhesives, 69 (2016) 58-71
Yeh, Mechanical properties of fluorinated DLC and Si interlayer on a Ti biomedical alloy, Thin Solid Films, 528 (2013) 136-142
Mantovani, The oxidation state of Ag nanoparticles highly affects the release of Ag ions without compromising the mechanical performance and the safety of amorphous hydrogenated carbon coatings, Diam.

Introduction Attractive combination of physical properties, excellent castability, mechanical properties and fluidity are among the reasons for the wide acceptance of Al-Si cast alloys in automotive and aerospace industries [1-2].
In the case of Al-Si cast materials, silicon is the main alloying added and its morphology influences the properties of parts produced.
The morphology of silicon is controlled by the following factors: solidifying rate, silicon content type, amount of modifier and impurities present in the melt [4].
The modified alloy display higher tensile properties and noticeably improved ductility when compared to the unmodified one.
Mondolfo, Aluminum alloys: structure and properties: Butterworths, 1976

Hardness is the aggregative indicator of mechanical properties such as strength, plasticity and toughness of material.
Therefore, it is necessary to study the influence factors and the change law of the hardness, which is of great significance to the control of the hot working technology of connecting rod.
However, the hardness of C70S6 is affected significantly by the ratio of pearlite and sorbite due to the extremely little ferrite content.
Hu, Research on Microstructure and Mechanical Properties and Fracture Splitting Properties of Forged Connecting Rod of C70S6 Non-quenched and Tempered Steel, Hot Working Technology. 44 (2015) 39-43.
Yue, The effect of microstructural characteristics of pearlite on the mechanical properties of hypereutectoid steel, Mater.

Chatter Mathematical Model Various factors are the source of vibration during milling.
Improved structural damping of small diameter end mills [3], passive linear shock absorbers embedded in the machine spindle [4], adjustable vibration absorbers installed on the cantilever plate [5], [6], additional mass elements that improve the dynamic properties of the workpiece [7], also help to reduce the vibration amplitude during milling.
Active methods of vibration reduction affect the source of disturbance, changing the magnitude or nature of the force loading of the elements of the technological system.
The physical essence of the mathematical model of the amplitude of forced vibrations during cylindrical milling is the sum of harmonic vibrations with different amplitudes at frequencies that are multiples of the frequency of the fundamental (first) harmonic, i.e. expression (1) can be represented as (2): (2) where Аi is the amplitude of the i-th harmonic of excitation; kdi - dynamic factor; φi is the phase of the i-th harmonic of excitation.
Meng, Chatter mitigation for the milling of thin-walled workpiece, International Journal of Mechanical Sciences. 138 (2018) 262-271

Some researchers studied the relationship between microscopic structure and mechanical properties [4-6].
Zhao Hui and others made a study on heat affected zone of X120 pipeline steel [9].
In rolling process, it’s more and more important to establish a mathematical model of deformation resistance which can correctly reflect the relationship between the technological parameters of hot deformation and the mechanical properties of metallic material so as to control the rolling process accurately and improve the quality of the products [11-13].
Chemical compositions and mechanical properties of the steels tested were shown in Table 1.
Fig.5 Effect of deformation temperature on deformation rate sensitivity Establishment of the mathematical model for the deformation resistance Deformation resistance of steel depends on the composition, the microstructure, deformation degree, deformation temperature, deformation rate and other factors in deformation process.

And micro-slip is an important factor to effect the energy dissipation, from the fretting characteristics, the damping and stiffness of connection, superficial effect and control engineering [2].
Thus, one is led to search for alternative representations of the energy dissipation induced by mechanical interfaces with larger structural models.
The significance of this work is to study the interfacial interaction parameters, e.g., pre-stress or pre-mechanical, joint clearance, kinematical velocity, on how to affect the dynamics response behavior of the translation joint.
Standard elastic properties for the steel are used: Young's modulus, Poisson's ratio.
The fundamental linear static is investigated and the interfacial interaction factors are considering in the studied, for example, the kinematics joint clearance changed with itself and the distribution pressure applied on the system is conduced the clearance variably.

Introduction H-beam section economic and reasonable, superior mechanical properties, manufacture and installation process is simple, convenient, fast, etc, are widely used the areas of national economic construction, especially in the heavy industry workshop, is often used as a bearing beam and column frame structure.
Bearing capacity coefficient and the relationship between the axial compression ratio is influenced by some factors, for the paper specifications and boundary conditions of specimen, is obtained by fitting the solid residual bearing capacity coefficient of simply supported specimens and axial compression ratio of a function of n.
Bearing capacity coefficient and the relationship between the impact energy is affected by some factors, for the paper specifications and boundary conditions of specimen, is obtained by fitting the solid residual bearing capacity coefficient of simply supported specimens and a function of impact energy.
Compared with existing experimental results, the finite element model can well simulate h-beam in drop hammer impact on the mechanical performance and axial Compression test (3)Impact on axial force of artifacts - coupling under the axial compression ratio and impact energy on the bearing capacity of the residual effect are analyzed.
Journal of mechanical design and research, 2001, (4)

Many research groups have focussed upon the improved mechanical properties of UFG materials compared with the coarse-grained (CG) counterpart [1].
From the mechanical point of view UFG-HT offers the most promising combination of high-strength with moderate ductility [9].
The same tendency can be deduced from the pit densities affected by ECAP and the modified condition, too.
In fact, [5] presents worse corrosion properties of the ECAP material Al99.99 compared to the CG material.
Furthermore, these NC and dislocation density were enhanced in the UFG-HT condition although the corrosion properties are not decreased.

Introduction The impact of rainfall-induced debris flow is not well understood for its strong cross-disciplinary, multi-factors, complex mechanism.
The mechanical properties of sand are shown in Table.1.
When the soil got close to saturation, the sand was gaining fluid characters as viscosity properties.
With the increasing of pore pressure and reduction of soil strength, the posterior sand with flow regime properties pushed the anterior sand to slide down fast.
Factors affecting rainfall-induced flowslides in laboratory flume tests[J].