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Progress and Trend of Artificial Heart Valve Simulation The design of an artificial heart valve’s load distribution and dynamics of valves components, which is together with material properties, determines performance and durability.
This research would allow the determination of factors influencing durability of the current prosthetic valve design and proposed improvement to it. 2.
Progress and Trend of Nature Heart Valve Simulation A number of computational challenges have always been present in modeling natural valve: its irregular geometry, complexity material properties, contact between components and dynamics.
According to previous studies, the natural leaflets can be considered as three-layered laminated structures: atrialis, ventricularis and fibrosa layer, with each layer having different thickness and mechanical properties[45].
Mohammadi,Design and simulation of mechanical heart valve prostheses.

Therefore, with the help of computer and in order to obtain a more accurate simulation data, it is necessary to find appropriate way to build up the simulation model of fuel common rail injection system, to study this system working pressure’s impact factors, which is caused by the changes in different operating conditions (revolving speed, load, etc.) and working parameters (e.g. injection volume).
Based on comprehensive analysis the whole structure and working principle of fuel common rail injection system, taking 7RT-flex60C marine intelligent diesel engine (manufactured by Wärtsilä company) for example, This thesis applies Matlab/Simulink software to build up fuel common rail injection system simulation model, analyzes the relating impact factors, takes simulating test by using this model, then the simulation results are comparative analysis to the official rack test data.
Eq.1 is the mathematical model of fuel nozzle cavity designed on the base of injector structure characteristic of 7RT-flex60C Marine intelligence diesel engine and liquid flow dynamics principle[4]: （1） in the formula：- nozzle cavity fuel pressure；-nozzle cavity volume；-fuel oil elastic modulus ,700-1000MPa；- the fuel flow injecting to combustion chamber, volume flow；- fuel flow from measuring piston to fuel injector nozzle, volume flow；-fuel volume variation caused by system parts’ mechanical movement.
To ensure the extendibility and reusability of fuel common rail injection system simulation model, in accordance with its function several sub modules in the system are divided, the whole system model is constituted by means of every sub module’s interaction and connection, which one module improved will not affect the others.
Sensitivity analysis of transient diesel engine simulation Proceedings of the Institution of Mechanical Engineers.2006, 220(D), p:89-101

CdSe@PMMA nanocomposite film possesses excellent transparency and ultraviolet (UV)-shielding properties.
It is important that nanocrystals retain their original optical properties after grafted with polymer.
Thus, we studied the optical properties of our covalently binding CdSe@PMMA nanocomposite.
Guo, Bioinspired Nacre-like Heparin/Layered Double Hydroxide Film with Superior Mechanical, Fire-Shielding, and UV-Blocking Properties, Ind.
Misra, Grafting: A versatile means to modify polymers-Techniques, factors and applications, Prog.

One reason can be found in the intrinsic complexity of the phenomenon and in the number of factors affecting the local interactions between two surfaces in contact, as lubrication conditions, material hardness, surface roughness, and so on.
The theoretical aspects of the contact are previously introduced in order to have complete indications on the mechanical aspect of the phenomenon.
In order to investigate the influence of the material properties and he surface roughness on the tribological behaviour of these contact couplings, six discs and six specimens were manufactured.
Materials and samples properties and labels.
As far as the material combination is concerned, couplings were classified on the basis the equivalent modulus of the coupling E’, i.e., according to Hertz’s theory, (1) where E is the elastic modulus, n the Poisson’s ratio (reported in Table 1) and the subscripts c and d refer to the cylinder and disc properties, respectively.

Thus, the phenomenon should be a result from change of dielectric properties in the present of surimi.
Moreover, documents about dielectric properties of silver carp surimi are available.
A further objective is to investigate the dielectric properties of adding silver carp surimi on wheat flour dough.
Eliasson [16,18] had reported that proteins influence the starch gelatinization by means of affecting the water transition in starch.
This phenomenon may be resulted from change of dielectric properties with adding surimi.

Introduction The light guiding plate is an important component of a back light unit that affects the optical efficiency and is mainly used to guide scattered rays to improve the uniformity of brightness of the panel.
Surface treatment must be carried out for special screw of light guiding pate because of PC with high viscosity, corrosion and temperature-sensitive properties.
In our past research [3], results showed Nickel-tungsten alloy plating and TiAlN coating were effective to improve the stripping properties.
Results showed that conventional electroplating hard chromium could improve the stripping performance a little compared to uncoated mold steel, and coatings of TiN and Nickel-tungsten alloy significantly ameliorated the stripping properties between the coatings and PC, which accorded with our former work.
Results revealed that TiN and TiAlN or similar coatings by PVD were effective to improve the stripping properties.

Mechanical output of the SAW motor was 270 times larger that of the weight and 500 W/kg in power.
The conversion efficiency from the traveling wave power to the motor mechanical output was 14 %.
From investigations based on experiments, it was found that slider surface texture affects motor performances such as speed and thrust [3]-[5].
Theoretically, however, the effect of the physical property of a slider-textured surface on motor performance has not been investigated sufficiently [10].
Hence, the effective factor [12] of projection contact was investigated and then fixed to be 0.6 in this paper.

It seriously affect the safety of personal, property .
When cracks produced, the mechanical properties of the wall decreased obviously, forming hidden trouble in the engineering. 3 The Causes Of Cracks And Settlement 3.1 Foundation Settlement.
According to the Dangerous Building Appraisal Standard (JGJ125-99), when the tilt rate of the building is more than 1% [1], it will affect the safety of the buildings.
To the existing buildings, because of various factors, such as changes of underground water level; base collapsibility do not make processing; uneven soil do not make processing; foundation has poor stiffness; and upper integrity of building is not good .etc, the base happens with uneven settlement, then the upper walls dehisce.

Hakimi has done specific mechanical researches of the vibration of the drill string [4].
The drill string can be considered as a one-dimensional elastic medium with piece-wise constant properties.
(5) Where, ω is the axial vibration natural frequency of the drill string, its value depends on the property of material and assembly of drill string.
The quantities of drill collars and heavy weight drill pipes will affect the effect of jarring operation greatly.
A Study of How Heavy weight Drill Pipe Affects Jarring Operation, Society of Petroleum Engineers, 60th Annual Technical Conference&Exhibition, September 22-25 (1985)

Introduction Remanufacturing production refers to the whole life cycle of the product recovery in removing and cleaning, using new surface engineering technology and other technical processing and assembly of some parts, process so that parts of the size, shape and properties can be recovered and reused.
Research shows that many factors influence the erosion behavior of coatings, such as hardness, fracture toughness, the bonding strength of coating, hard phase and binder phase content, it has been widely reported in [3].
Cavitation and cavitation erosion reduces the flow of liquid, affect the motion accuracy and reliability of actuator. 2.
Mechanical Industry Press, 2011 [3] Xu, Liu Shican, Shi Peijing.