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Fan parameters can affect the performance.
Overview of Fan Flow Field Simulation and the Noise based on CFD Software CFD numerical simulation calculation is a complicated process, accurate calculation is influenced by many factors, including the size of grid, boundary settings and computer software and hardware equipment [3, 4].
-dp/BMODULUS)*sqrt(BMODULUS/rho_ref); return a;} DEFINE_SDOF_PROPERTIES(test_box, prop, dt, time, dtime) {prop[SDOF_MASS] = 666.66; prop[SDOF_IXX] = 129.6296; prop[SDOF_IYY] = 111.1111; prop[SDOF_IZZ] = 129.6296; printf ("\n2d_test_box: Updated 6DOF properties");} …… CFD Simulation Calculation for Fan Flow Field and Noise In order to verify the validity and reliability of the fan flow field and noise model designed in the second part, this paper selects the true fan as the research object, mainly by numerical simulation and experimental simulation to verify the accuracy of CFD.
Chinese mechanical engineering, 2011, 19(2): 160-162
Fuzzy finite element optimization of the complex mechanical structure.

The numerical modeling results by analyzing the displacement variation and soil affected area at different distances show that when the shield tunnel excavation, the ground settlement becomes smaller with increasing distance from the shield center line of the pile and the maximum ground settlement is 10.778mm.
The main physical and mechanical properties of the layers of soil are shown in Table 1.
Table 1 Mechanical parameters of soil strata Number soil Range （m） Density （kg/m3） Bulk modulus （MPa） Shear modulus （MPa） Friction angle （°） Cohesion （KPa） ① +3.97～+1.60 1850 5 2.3 14 18 ② +1.60～7.35 1920 9.83 4.53 15 38 ③ -7.35～12.75 1940 9.83 4.53 15 42 ④ -12.75～17.62 2100 16.6 7.96 33 52 ⑤ -17.62～20.79 2200 20.83 9.61 35 56 Fig.1 Concrete layout Modeling and analysis process Using FLAC3D software model size, according to the scope of the tunnel excavation, calculated with reference to both the experience and the practical engineering conditions, the bottom of the model from the tunnel to take center 27m, the entire model size is 80m×40m×40m, where the horizontal direction x 80m, value y direction is 40m (pile length direction), z-direction (the direction of tunneling) to 40m are shown in Fig.2 and Fig.3.
Fig.10 Vertical displacement Fig.11 Horizontal displacement Levels pile deformation analysis.Pile affected shield tunnel excavation will produce distortion in the horizontal direction, mainly for displacement in the horizontal direction.
Construction will shield the soil, pile produce a series of changes, changes in ground movement and rigidity produce pile soil properties affected by the decision are all horizontal displacement of the pile size factor.

The advantage of the new algorithm is above all that irregular fracture front can be realistically simulated, which in turn reflects the stress states in multi-layers and their different rock mechanical properties.
The stratigraphy, required petro-physical, mechanical and reservoir properties are available and were provided from the involved companies [4].
In addition, the fracture half-lengths of FLAC3D are slightly affected by the time step and the element size.
The advantage of the new algorithm is above all that irregular fracture front can be realistically simulated, which in turn reflects the stress states in multi-layers and their different rock mechanical properties.
In contrast, the fracture front in FracPro is always composed of two half ellipses regardless of the mechanical and hydraulic properties of the stratification and hence the fracture propagation pattern is uniform.

Designing a concrete mixture means selecting the ingredients and their right dosage to get specified concrete characteristics and properties in the final design mix; these characteristics include fresh concrete properties and mechanical properties after the concrete is hardened.
Properties of seashell aggregate concrete: A review. 
Vernacular building materials and the factors conditioning their use: tabby, a case study. 
Hydrogeomorphic processes affecting riparian habitat within alluvial channel–floodplain river systems: a review for the temperate zone. 
Fundamental properties. 

Thus, using the optimal amount of oxygen is important to improve the mechanical properties of titanium alloys.
General trend of the effect of oxygen on the mechanical properties of titanium alloys One of the examples of the general effect of oxygen on the mechanical properties of titanium alloys is as follows.
The a case is brittle, leading to deterioration in the mechanical properties.
The effect of oxygen of over 0.4 mass% content on the mechanical properties of TNTZ was investigated.
Yashiro, Design and mechanical properties of new beta type titanium alloys for implant materials, Mater.

The particle size and distribution are characterized by Zata Potential- Particle analyzer, as well as analysis of the film mechanical properties and thermal performance.
Measurement of mechanical properties Taiwan's U-CAN electronic tensile testing machine (UT-2080) is adopted to measure the mechanical properties of film with a tensile rate of 250mm/min at a temperature of 25°C.
The analysis of mechanical properties of the P(VAc-BA) emulsion modified by EGDMA Table 2 shows the mechanical property parameter and the degree of films.
It indicates that the mechanical properties increase with the degree increased.
Therefore, the mechanical properties are better when 0.5% EGDMA is added in the the PBA homo-polymerization.

The activate processe of Ni-P electroless plating on the surface of SiC particles Jun Ying Hou1,a, Di Yang1 1Institute of Mechanical and Electrical Engineering, Surface Engineering Laboratory, Qingdao University of Science and Technology, Qingdao 266061, P.
Introduction SiC particles have many excellent performances, such as steady chemical property, high thermal conductivity, low thermal expansion coefficient, good wear resistance and high hardness.
These products change the micro-structure of metal matrix, and cause the unfavorable effect on the interface bonding and the material mechanical properties[3].
Experiments were carried out according to the factors affecting SiC particles activation effect, such as stirring methods (intermittent stirring and continuous stirring), activation methods and the plating temperature (between 50°C and 90°C, taking experiment temperature interval 5°C).

The mechanical and chemical driving forces have still to be accurately evaluated and the role of each one identified.
Notwithstanding the studies on mechanical surface treatments such as cold rolling or shot peening [3,4], the original idea of the author was to design hollow mechanical components, made of steel or light alloys, with hardened compressive residual stresses protected surfaces.
These are preliminary results and a much more expensive and time consuming test campaign is going on because the step loading technique might affect the results due to the not appropriate time of exposure to the aggressive environment.
Oechsner, “Corrosion properties of polished and shot-peened austenitic stainless steel 304L and 316L with and without plasma nitriding”, [4] S.
Vergani, “A Numerical Procedure for Shot Peening Optimisation by Means of Non Dimensional Factors”, International Journal of Materials & Product Technology, Inderscience Enterprises Ltd, Genève, Switzerland, Vol. 15, Nos. 1/2, 2000, pp. 91-103

However, the applications of pristine HAp have limited due to low load bearing applications due to its inferior mechanical properties, especially fracture toughness properties compared to cortical bone.
The addition of second phase ceramic materials could be develop in order to enhanced mechanical properties of HAp including strength and toughness [5].
Mechanical properties of HAp–ZrO2 composites.
The Effect of Zirconia Reinforcing Agents on the Microstructure and Mechanical Properties of Hydroxyapatite-Based Nanocomposites.
Mechanical properties of hydroxyapatite-zirconia compacts sintered by two different sintering methods.

The presence of macrosegregation could result in different mechanical properties in the corresponding locations [5], and therefore variability in physical and mechanical properties of the final product.
Despite the fact that most of segregation phenomena can be physically explained [6], the increase in ingot sizes and the existence of a multitude of factors that could affect the macrosegregation properties make the analysis of this phenomenon more complex.
This could affect the mode of the primary solidification, austenite (γ) or ferrite (δ), which could affect in turn the quantity of alloying elements, (γ) promoting or (δ) promoting, contained in the solidifying phase.
Summary The individual alloying element chemical heterogeneity analysis is a useful way to understand the macrosegregation mechanisms and properties.
Funatani, Handbook of mechanical alloy design, Marcel Dekker, Inc., New York Basel, 2004.