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Introduction Nowadays, all-ceramic crowns and veneers are amongst the best choice for aesthetic treatment in the anterior region due to the natural appearance and fair mechanical properties.
There are many factors that influence on the color stability of the resin cements including exposure to environment factors, ultraviolet irradiation, heat, water, which may cause a color mismatch in an otherwise acceptable ceramic restorations.
It exhibits outstanding esthetic features and adequate strength properties.
In addition, the physicochemical properties of monomers used in a resin matrix may influence resistance to staining.
Bolay, Micromechanical properties of veneer luting resins after curing through ceramics, Clin Oral Invest. 16 (2012) 139-146

Although the vane turbine affected speed loss of the ship, the power efficiency gained to be found always positive.
a : induction factor CPt : power coefficient of turbine CTt : thrust coefficient of turbine Table 1.
Vane turbine at slipstream will change kinetic energy slipstream will become mechanical energy.
Thereby simply, the thrust propeller and negative thrust turbine can be illustrated with simple algebraical equation (7), (7) And of course, the total Thrust of the system was smaller and affected the speed loss of the ship.
Chen, A.M Reed, K.H Kim : A Vane-wheel propulsor for a naval auxilliay, ( DTRC - 89/023 , 1989) [6]. - : Simplified prediction of propeller inflow/outflow properties ( A Hydrocom Technical Report, No 129, 2003) [7].

Currently, one of the significant drawbacks in the RLFS is the lack of correlation between the quantity of fed LM and properties of the rolled material.
Determination of the rolling lubricant feeding system influence on the main technological parameters of the hot rolling process To determine the impact of the RLFS on parameters and characteristics of the hot-rolling process, to establish various properties and laws the statistical processing of the received information about the work of the system has been carried out.
(4) Parameter calculation of the friction moment Мfrw-br between the back-up and working rolls for steels with different mechanical properties gave a numerical representation of how this parameter varies in the lubricant supply condition (Table 1).
Development of a mathematical model for the LM flow determination When considering the determination of the LM consumption it was proposed to review the existing scheme of its supply and create a balance equation (Fig. 1), according to which the total LM consumption (4) was determined by the sum amount of expenditure on the adhesiveness of the backup roll (Qa), the ​​contact area of the working and backup rolls (Qc), as well as the amount of material carried away with the backup and working rolls (Q1) minus the LM amount lost (Q-) due to flushing water and a number of other factors, determined by the LM loss coefficient from the Eq. 5 and Eq. 6: Q=Qa+Qc+Q1-Q-, (5) Qa-Q-=k-∙Qa, (6) k-=Qa-Q-Qa=ha-h1-ha
Glivenko, Defining the parameters affecting the efficiency of the lubrication supply system for the finishing stand group on the hot rolling mill 2000 at the OJSC MMK, Science and Industry, Reports of the Eleventh All-Russian scientific-practical conference with international participation: Contemporary problems of the mining and metallurgical complex, Staroosk. technolog..

Baker [1] initiated a chart for describing the flow regime in horizontal pipes using numerous fluids; the Abscissa and ordinate axes of the map represent the mass fluxes of the gas and liquid phases and that indirectly involve the fluid properties such as viscosity, density and surface tension.
The phase distribution is playing a major role in the designing of many engineering structures because it affects the values of several parameters such as pressure drop and thermal load, therefore it is necessary to determine the distribution and specify the flow regime that may exist in the system.
The standard combination, at which both parameters λ and ψ equal unity, is water and air flow under atmospheric pressure and at room temperature, where the dimensionless parameters λ and ψ are property correction factors used for any vapor–liquid combination.
Fig. 1: Baker chart. (●) Operating conditions of water–air two phase flow [1] Using the physical properties of any vapor–liquid and air–water properties, the parameters λ and ψ are can be calculated from this equation [6]: (1) (2) Where the subscripts ‘a’ and ‘w’ refer to air and water, respectively at normal temperature and atmospheric pressure, while the subscripts ‘G’ and ‘L’ are refer to vapor and liquid conditions of the fluid being considered.
Rogero, “Experimental Investigation of Developing Plug and Slug Flows,” PhD, Mechanical Engineering, Universität München, Germany, (2009)

Washing water consumption of the process is high, separation of fat and black liquor is not complete, and affects the quality of refined cotton.
Refined cotton has mainly two difference characteristics with nitrocellulose: 1) its fiber length is 1-4mm, more than the latter; 2) The former has good hydrophilic and good adsorption properties, and the latter do not dissolve in water.
The most important factors of dewatering influence of refined cotton are: ① slurry concentration, feed concentration of refined cotton is too low (2-5%), On the one hand, may be too thin because of the formation of the cake without the cake discharged from the drum, in the other hand, the so-called "over the limit overflow" phenomenon, for this reason, the slurry is required pre-separation before entering the centrifugal concentration. the method is slurry pass through the settlement wall screen, filter out some fresh water, the slurry concentration is about 10%; ② separation factor Fr, separation factor is proportional with the square of the speed drum and diameter, the greater the separation factor, the greater the filtration driving force, the faster the filtrate through.
Ensuring the piston can push, separation factor increases, more conducive to refined cotton dehydration.
The right of Eq.2 is a constant, it determined by the slurry properties and the sieve.

Properties of plastic and mould insert material are shown in Table 1 and 2 respectively.
Physical and mechanical properties of ABS.
Properties of P20 mould steel.
Factors and levels for different type of gate.
The significant factors affected warpage of the moulded parts with a single gate includes factor A (coolant inlet temperature, CT), factor B (material melt temperature, MeT), factor C (packing pressure, PP), the second order effect of factor A (coolant inlet temperature, CT), B (material melt temperature, MeT) and C (packing pressure, PP), and the interaction effect of factor A (coolant inlet temperature, CT) with factor B (material melt temperature, MeT).

Introduction For a spur gear drive, one of the key factors affecting its gearing property is the tooth profile [1].
Ai, Study of generation of specific gear and simulation of machining process, Chinese Journal of Mechanical Engineering 39(1)(2003)143-147(In Chinese)
Long, Double involute gear with ladder-shape Teeth, Chinese Journal of Mechanical Engineering 31(6)(1995)47-52(In Chinese)
Liu, et al, The constructing principle and characteristic of tooth profiles with micro-segments, Chinese Journal of Mechanical Engineering 33(5)(1997)7-11(In Chinese)

On the Development of Blend Faces and Holes Recognition Algorithm for CAE Applications Jiing-Yih Lai1*, Zi-Wei You1, Yu-Kai Chiu1, Ming-Hsuan Wang1, Chia-Hsiang Hsu2, Yao-Chen Tsai2 and Chung-Yi Huang2 1Department of Mechanical Engineering, National Central University, Taiwan 2CoreTech System (Moldex3D) Co., Ltd., Taiwan * jylai@ncu.edu.tw Keywords: Holes recognition, Blend faces recognition, Feature recognition.
Abstract Mesh generation is one of the key factors affecting computational efficiency and accuracy in finite element analysis.More and more software provides modules for automatic meshes generation.
It utilized the property that a hole was always accompanied with an inner loop in the B-rep model.

The functionality of polyol has a profound effect on the properties of RPUF [10].
RPUF with good mechanical properties, very low density and excellent dimensional stability could be prepared by fully water-blown technology with various water levels.
With increased water level, the cream time, gel time and tack-free time of foaming mixtures increased accordingly, while the density and mechanical properties decreased gradually and the cell diameter initially decreased and then increased [13].
The choice of blowing agent has a significant influence on a number of these factors.
This material forms a grid of cell struts and cell walls that can withstand mechanical loads due to its rigidity and cross-linking properties.

Inside these ceramic coatings, the mullite is a good option, since it presents very good mechanical properties, great corrosion resistance, high thermal resistance and high durability.
Meanwhile, FGM concepts have triggered world-wide research activities and are applied to metals, ceramics and organic composites to generate improved components with superior physical properties [3].
In this case, the different deposition times affect the film aspect.
The dissimilar amount of species is important for the 30 min. and 60 min deposition times because the film properties and characteristics change with this variable.
But these results must be confirmed experimentally since kinetic factors exist and these determine the final result of the oxide process. 300µm 500µm 100 µm 40 µm (a) (b) The first oxidation conditions indicate that the best results were obtained at higher temperatures.