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Engine shield’s structure immediate influence pedestrian is protecting the forehead collision safety performance, its mechanical property (for example yield strength), the stock thickness, the hinge position distribution and so on various aspects factor has the very important influence to the result.
Collision Hazard Point Research According to related literature [4~5], the pedestrian forehead collision injury value with engine shield’s mechanical property, the stock thickness, bulge hard object’s underneath position, impact point and this spot factor and so on gap relevance is very big.
Figure 9 has demonstrated on its engine shield’s some structural property.
(3) As a result of too many of correlation factors with the pedestrian forehead collision injury value.
Therefore, how to consider the relevant formula more factors that even forecast directly the HIC value the size in is the content which needs to further study.

Fig. 1 The structure of multi-axis cascading PCB drilling machine The high speed and high precision multi-axis cascading PCB drilling machine is a typical optic-mechanical integration product.
These factors lead to the increase of the stiffness and damping of Z-axis floor.
With the affect of contact stiffness and damping, the modes are similar and the frequencies have fewer differences in the fourth situation.
By the modal tests of the Z-axis floor on which the cascade is added and the motor spindle has been added, the results are compared with the ones without cascade, from which the affect of the cascade to the dynamic properties of Z-axis floor, which can offer the basis of the selection of cascade bar and determination of the size of the preload applied to the nut in the Z-axis floor when the cascade is assembled, is got to know.
This may have affect to the precision of drilling and the structure of the Z-axis floor needs improving.

Postoperative tendon adhesion has been one of the clinical problems plagued researchers, because it not only affects the outcome, but also results in serious postoperative complications and even makes the successful surgery fail.
Ideal anti-adhesion material should have good biocompatibility, suitable organization adhesion (needn’t sutures) , it can completely cover the wound surface and have sufficient residence time in vivo, in order to play a biological barrier function, must have a permeability, can degradation and absorption without the need for secondary surgery to remove it, can effectively prevent adhesion formation and without affecting the normal healing of wounds, should also have a certain degree of mechanical strength to facilitate the implementation of the operation.
Table 2 The mechanical properties of ES mats ES mats Elongation (%) Ultimate stress (MPa) Young's modulus (MPa) Annealed 2.50 ± 0.91 0.85 ± 0.69 30.3 ± 21.3 Non-annealed 7.54 ± 2.14 1.11 ± 0.42 23.6 ± 13.2 The Mechanism of Action of Chitosan Preventing Tendon Adhesion.
Chitosan can promote macrophage phagocytic function and improve the secretion of hydrolase activity, can secrete a variety of immune factors, regulate other cellular immunity and humoral immunity, thereby enhancing the body's ability of anti-infections.
The effect of Sodium Hyaluronate onTendon Adhesions The sodium hyaluronateIts is one kind of sodium salt, it has biological characteristics of hyaluronic acid, medical sodium hyaluronate solution has many important physical characteristics because its characteristics of without rules coiled state and hydrodynamic in solution, such as height viscoelastic, plasticity, permeability, unique theological properties and excellent biocompatibility, this biological material is non-toxic, non-antigenic, non-teratogenic and carcinogenic, it can promote tendon healing, prevent and reduce adhesion formation, it’s one kind of extensive used biomedical materials in clinical.

Modification of the mechanical properties of SiC through doping is a potential pathway for improving resonator performance.
The modification of the dopant density provides a promising pathway to modify the temperature coefficient of frequency (TCF) to optimize the Q-factor for acoustic resonators.
These defects affect large areas of the surface and extend above and below the epi-surface by a few micrometers.
These samples exhibited up to 20 nm steps by AFM, which could be removed with a chemo-mechanical polishing finish.
In future work the SiCOI layers will be fabricated into BAW resonators and characterized to determine if their inherent material properties enhance the resonator performance metrics.

The BI component, however, contributed an additional amount of resistance that depended in part on the angle value imposed between wire and bracket but also on the elastic properties of the wires (elastic modulus).
In this case, the elastic property (elastic modulus) became an important factor for the level of resistance of sliding.
Summary Shape memory alloys such as NiTi alloys display great interest in dentistry because of their peculiar elastic properties.
Our results showed that the archwire mechanical properties (especially elastic properties) appeared to be a factor that can significantly influence the friction, which depends both on surface and mechanical properties.
Then, coefficient of friction and orthodontic wire stiffness are the two critical factors influenced the friction generated when an orthodontic wire slides through non-aligned brackets.

It plays an important role in defence, building, transportation and chemical industry in the form of resin and composite material[1] due to their low price, high mechanical strength, inflaming retarding, low smoke and self-extinguishing properties.
Many papers report on the reaction condition, influence factors, mechanism and modification of phenolic resin using alkali metal hydroxides, alkaline earth metal hydroxides, carbonates, ammonia and sodium hydroxide as catalyst.
Besides, reaction time has great effect on molecular weight and therefore influences the properties of phenolic resin.
In water, sodium hydroxide ionizes to a lot of hydroxyl ions and affects the reaction greatly.
Since para-position hydroxymethyl group is not affected by space and chemical effects of phenolic hydroxyl and benzyl alcohol, dehydration between para-position hydroxymethyl groups and the active para-hydrogen[6] on phenolic ring dominates, thus leading to para-para position linkage[8-9].

High levels of mechanical and radiative properties of the final product can be ensured by the development of a production technology.
Further increase of density does not raise the temperature of the process and, therefore, does not affect the phase composition of the final product, and the properties of the resulting material.
The established difference between the numerical and instrumental experiments is related primarily to the following: the initial temperature affects not only the thermodynamic parameters of combustion wave propagation (primarily, the coefficients in the heat conductivity equation), but also the kinetics of the chemical reactions that was not taken into account in the developed model of the thermal state.
The model allows determining the process temperature at the stage of blend preparation as a function of main SHS control factors.
Dudina, Application of self-propagating high-temperature synthesis and mechanical activation for obtaining nanocomposites, Combust.

Titanium alloys are very interesting materials for industrial applications and most titanium alloys have been designed for aeronautical applications, due to their excellent specific properties such as high strength-to-weight ratios, maintaining its strength at high temperatures.
The physical and mechanical properties of Ti-17 are listed in Table 2.
The temperature generated during a machining operation is influenced mainly by the properties of the workpiece, tool material and the machining parameters used.
In many cases, the temperature remains sufficiently high to adversely affect the performance of cutting tools [11].
Therefore, high machining temperature is one of the main factors limiting the machinability of the Ti-17 alloy.

Geometrical parameters of welded joint affect the stress concentration coefficient seriously.
The stress concentration sensitivity of structural materials is primarily determined by their properties, theoretical stress concentration factor, the size of the objects under investigation, loading conditions [2].
There are a lot of factors influencing fatigue strength of welded structures, but stress concentration is the most important one.
The influence factors on stress concentration of welded butt joint This paper focuses on the main factors, including weld toe inclination angle θ and weld edge transition arc radius r.
Stress concentration factors and fatigue behaviour of welded thin walled CHS-SHS T-joints under in-plane bending[J].

Simulation Analysis of Splat Deposition in Plasma Spray Forming Ziyu Zhao1,a, Bibo Xiao1,b, Suzhi Zhang1,c and Li Wang1,d 1College of Mechanical Engineering and Automation, Huaqiao University, Xiamen, Fujian, 361021, China azyzhao@hqu.edu.cn, bxiaobibo@hqu.edu.cn, czhangzhs@hqu.edu.cn, dhuyana88@163.com Keywords: Numerical Simulation, Flattened Particle, Plasma Spray Forming.
Flatten behavior of a single Ni droplet falling on a smooth substrate is evaluated by numerical simulation of ANSYS software, this paper meanwhile researches a single Ni particle deposition in the surface of flattened Al2O3 sheet and thin Al particles, the impact factors of particles flattening and the mechanism of the interaction between particles are also studied.
Dynamic spreading of a single plasma spray droplet in forming process directly affect the quality of the coating, because of small size and high speed, observation of real-time tracking a single droplet flattening through the experimental measurement is very difficult, so numerical simulation methods have became research approach for many scholars.
Harlow using MAC (mark-and-cell) finite difference method, for the first time simulated the process of droplet splashing in the plate, whose research ignored the surface tension and impact of viscous dissipation [1]; Madejski studied theory on the flattening and cooling heat transfer behavior of molten metal droplets colliding with the cold substrate [2]; Mostaghimi considered that after the collision the rapid cooling layer has a significant effect on the course of flattening by numerical simulation [3]; Xiangyang thought the adsorptive material of the base surfaces is a major factor leading to the particle crushing in the collision [4]; Through observing the microstructure of nickel flattening particle, Fukumoto concluded that splash was due to the rapid flow of droplets [5].
The results showed that after the particle collide with the substrate, it spread evenly around along the contact surface, height decreases and diameter increases, finally tending to pancake-like, but splashing and broken may occur due to the high impact velocity; high-speed droplet particles spread in the deposition surface of the splat shows that for the random of deposition particles before and after, surface becomes rough, which have a very significant impact on the degree and shape of subsequent droplet dispersing and formation and distribution of sprayed layer pores, it will direct effects finally generated microstructure of sprayed layer and bond strength or other macro-mechanical properties.