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Ultrasonic sensors provide essential information on elastic, mechanical, and material properties with high accuracy and timeliness [10].
Beall, Overview of the use of ultrasonic technologies in research on wood properties, Wood Sci.
Determination of the mechanical properties of Castanea sativa Mill. using ultrasonic wave propagation and comparison with static compression and bending methods.
Factors affecting ultrasonic measurements in solid wood.
Measurement of elastic properties of materials by the ultrasonic through-transmission technique.

Zhao and Wu systematically investigated the electronic and mechanical properties of LaN using the density-functional theory [4].A previous self-consistent augmented plane wave band structure calculation by Hasegawa [5] shows a band overlap of 9 mRy.
Results and discussions Structural properties.
Electronic properties.
Two different factors determine the response of materials to pressure: (a) changes in nearest-neighbor distance, and (b) changes in symmetry.
To see how these two factors affect the electronic properties, we present band structures and partial density of states (DOS) of LaN at 60 GPa, as shown in Fig. 2.

Jia et al. [4] describes the theory and properties of the false compound TbxDy(1-x)Fe2, which has the cubic and Laves-phase structure as Rfe2 possesses much larger magnetostriction in room temperature.
The simulation results indicate that there are many factors which have influence on the resonance frequency.
The moment of inertia of the mirror and mirror support is one of the most significant factors, and the stiffness of the suspension also.
A true mechanical structure was manufactured according to the optimized model.
By virtue of the numerical simulation, many factors which affect the natural frequency of the system are obtained at very low cost, and finally the reasonable model is achieved, corresponding mechanical structure is produced.

Among the most important parameters monitored for the binders used are chemical resistance, resistance to mechanical abrasion, adhesion properties, and the ability to penetrate the structure of the sleeve used.
In terms of properties, the price was also an important factor here and the availability of the secondary raw materials themselves, the pre-treatment of the filler was intended and evaluated under laboratory conditions.
Subsequently, the masses were divided into five categories to define their properties compared to the applicability of the reference mass.
With poor design, polymerization throughout the cross-section and the resulting CIPP liners do not have adequate mechanical properties.
The Mechanical Properties of Hgh Strength Reinforced Cured-in-Place Pipe (CIPP) Liner Composites for Urban Water Infrastructure Rehabilitation [online]

Coated fabrics have complex composite structure whose mechanical properties are considerably improved in relation with the initial basic material.
Mechanical properties of the yarns are changed, and the rotation between the yarns is prevented.
Structural properties of woven material in coated fabrics are the result of a combination of numerous factors.
Their structural properties are shown in Table 1.
Bassett et al., Experiment Methods for Measuring Fabric Mechanical Properties: a Review and Analysis, Textile Research Journal, 69 (1999) 11, 866–875

Although some studies have focused on using the unique structures of plants leaves in structural optimal design to get favorable mechanical properties [10].
Bionic Model for Thin-walled Stiffened Plate One model is needed to satisfy the difference in mechanical properties between vein and ground cells, and to deduce the growth of the veins perfectly.
Discrete plate-beam method based on finite element method was selected to build analysis model with the boundary conditions for solution that regard plate and reinforcement as shell and beam element properties respectively.
That was built upon the following rules: (1) cell walls are viscoelastic and elongate under turgor pressure; (2) the mechanical properties of vein cells are different from those of ground cells; this assumption is essential as it induces the inhomogeneous mechanical stresses that drive the reorganization of the venation network; (3) cells divide when they reach a threshold area; (4) new veins appear when the areoles reach a threshold area [13].
Above all, using the excellent adaptability of the plants to get the bionic structures is not only the key to optimize mechanical property, but acoustic performance.

In order to make the unfavorable factors into favorable factors, the plasma should be controlled by the protective gas.
Considering mixed gas to eliminate the adverse factors to obtain satisfactory welding quality.
There are negative factors to restrain plasma when Ar, He and N2 is used solely as protective gas.
Zeng: Study on microstructure and mechanical properties of 304 stainless steel joints by TIG, laser and laser-TIG hybrid welding.Optics and Lasers in Engineering, Vol. 48 (2010)p.512
Mo, et al: Study on influence factors of transient behavior of laser brazing weld pool of beryllium.

The spatial temperature distribution in the target range of the ICF driver is one of the key factors, which affects the precision optical components and equipment for normal operation.
Meanwhile, the temperature change is also one of the main influence factors of the stability of the target range structure.
In this paper, the middle level structure space of the ICF driver’s target range as the research object, with the aid of finite element analysis method has been calculated and analyzed for the features of environment temperature distribution in the middle level structure space of the ICF driver’s target, and we analyzed the effective factors and control measures to improve the temperature distribution.
Heat radiation transfer equation: For the media of absorption, emission and scattering properties, the radiation transfer equation (RTE) along the direction of at the location is: (2) Furthermore the boundary condition is needed. ① Flow boundary condition The air flow is little in target range space, and the boundary condition is no-slip walls.
The temperature distribution of target range is affected greatly by target chamber, switchyard, vacuum unit and other equipment as the main inner heat resources.

Experimental Study of Tensile Preloading Influence on the Mechanical Behaviour of Pseudo-Ductile Hybrid Composite under High-Velocity Impact Nikita A.
Tensile or compressive preloading affects not only the amount of energy absorbed by the composite but also changes the deformation and fracture pattern.
Preload is one of the important factors affecting the mechanical behaviour of FRPs under the impact.
Valente, et al., Hybrid composites based on aramid and basalt woven fabrics: Impact damage modes and residual flexural properties, Mater. and Des. 49 (2013) 290-302
Zhikharev, Effect of tensile preloading on the ballistic properties of GFRP, Composites Part B. 169 (2019) 524-531

Recently, titanium alloys have been widely used in industry owing to their excellent physical and mechanical properties.
Introduction Titanium alloys have been widely used in aerospace industry, mechanical engineering, automotive engineering, because their excellent properties including high tensile strength and toughness, light weight-strength ratio and extraordinary corrosion resistance.
It has excellent mechanical, electrical, thermal and optical properties.
Free surface, back surface and chip thickness which are important factors indicating the effectiveness of the new coolant, were analysed.
Guo, A new multi-view approach to characterize 3D chip morphology and properties in end milling titanium Ti–6Al–4V, Int.