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However, due to inaccuracy of experimental data caused by uncertain factor, the limitation of space and experimental expense, numerical simulation is accepted as an effective and efficient mehtod in the research of wind-blown sand movement.
The aerodynamic drag FD: The forces acting on a sand particle moving in air flow, at the same time, air flow is also affected by the force of particle.
Fig.2 The smoothed length and support domain The Key Factor of SPH Method.
By observation over these results, it can be concluded: (1) The sand particles at the top of the sand bed are remarkedly affected by the air flow speed, and it will turn into the state of lifting-off motion in a short period of time.
(2) The sand particles in the middle layer of sand bed is not only affected by the air flow, but also by the extrusion and haunch-up actions from its upper and lower sand particles, respectively.

Flexible and Ecological Reinforced Earth Retaining Wall belongs to flexible retaining wall, which can withstand large ground deformation, differential settlement and the load which can’t be predicted, these features will not only not reduce the structural integrity , but also improve the structural integrity by strengthening the interaction of the entire structure, and it does not produce internal force affecting the stability and the temperature sewing, all of those overcome the shortcomings of easy to crack due to uneven ground of traditional gravity retaining wall. 2.4 The Better Stability Three dimensional Drainage Flexible and Ecological Reinforced Earth Retaining Wall with self-locking structure, by force as a whole, have a good cushioning effect on the impact and good earthquake resistance.
The Main Component 3.1 Reinforced Material Reinforced material choose two-way high-strength polyester warp geogrid with high strength, small tensile strain, good anti-aging properties, small creep deformation, its tensile strength not less than 110kN/m and corresponding to the maximum tensile strain of ≤ 10 % ,the width is 5 meter. 3.2 Ecological Bags The ecological bags is most important component of the Three dimensional Drainage Flexible and Ecological Reinforced Earth Retaining Wall, polypropylene as the main raw material, with anti-UV, anti-aging, anti-acid salts, anti-microbial erosion and other effects.
Try to avoid large-scale construction machinery close to the 1meter range of the ecological bags, small mechanical compaction or artificial compactor can be used within this range , in order to meet the design requirements for the degree of compaction. 4.8 Slope greening Retaining wall construction is completed, Seeding herbaceous plants of tall fescue and zoysiagrass, and cutting liana creeper cuttings density of 4 per bag.
By "Li-zheng geotechnical retaining wall design software " checking, the structure meet the following safety factor : (1) internal stability : (1) The Safety factor of anti - pulling force Fs ≥ 1.5 ; (2) external stability : (1) The Safety factor of anti- slip Fs≥ 1.5 ; ②The Safety factor of against overturning Fs≥ 2.0 ; ( 3 ) foundation stress is greater than the design stress ( 4 ) The Safety factor of overall stability Fs≥ 1.5 . 6 Conclusion By the analyzed and discussed of the new type retaining structures ---Three dimensional Drainage Flexible and Ecological Reinforced Earth Retaining Wall through its advantages, its compositions and its construction key points, we learned the Three dimensional Drainage Flexible and Ecological Reinforced Earth Retaining Wall was a perfect combination of reinforced earth retaining wall and Grass protection, which has full play of the advantages of the two kinds of protection.

Luis1,b 1 Mechanical, Energetics and Materials Engineering Dept. - Manufacturing Engineering Section Public University of Navarre, Campus de Arrosadia s/n, 31006.
This process is a new technique used to obtain an improvement in the mechanical properties, such as higher yield stress, higher ultimate tension, more ductility, higher elongation, etc, of the processed materials.
These improvements on the mechanical properties are based in the metallographic grain refinement, as a consequence of the plastic strain accumulation inside the material [2].
This study is interesting in order to know the accumulated strain, because it would be one of the principal factors that affects in the posterior heat treatment.
Puertas, Mechanical behaviour of an Al-Mg alloy processed by ECAE, The 21st international manufacturing conference IMC 21,2004, Vol. 1, p.167-174, Ed.

Titanium and its alloys have low density compared to other metals of similar mechanical and thermal properties.
The conclusion was, the titanium surface etched with H2SO4 and HCl according to its topography combines the main properties of roughened titanium surface: glossily micro rough and large waviness.
Major factors for industry appliance are the reproducibility and productivity; therefore, we took into account at the surface treatment the low material decrease and shortest etching time.
Ahossi et al, Biological properties of acid etched titanium implants: effect of sandblasting on bone anchorage, J.
Muller, Relationship between surface properties (roughness,wettability and morphology) of titanium and dental implant removal torque, Journal of the Mechanical Behavior of Biomedical Materials 1 (2008) 234-242

This system of mainly serially connected elements is characterized by the throughput (overall amount of bulk coal respectively overburden rock produced), which is dependent on the functioning state of each involved equipment, and is strongly affected also by the process inherent variability due to the randomness of the involved processes (e.g. the cutting properties of the rock).
This system of mainly serially connected elements is characterized by the throughput (overall amount of bulk coal respectively overburden rock), excavated, conveyed and sent to stock pile or next user, which is dependent on the functioning state of each involved equipment, and is affected also by the process inherent variability due to the randomness of the cutting properties of the rock.
It is presumed that L is always less than S, the difference S-L being called safety range while the ratio S/L is called safety factor.
Kovacs, Research Regarding The OEE (Overall Equipment Effectiveness) Assessment Of The Coal Open Pit Mines Production System, Annals of the University of Petroşani, Mechanical Engineering, 8 (2006), 139-146 , ISSN 1454-9166 [5] I.

Introduction The traditional inorganic material, graphite, is an ideal electrode material and has been widely used in electrolysis of molten chlorides, due to its characteristics of excellent mechanical property, good electrical conductivity, oxidation resistance, flame resistance, high-temperature resistance, anti-corrosion, and so on [[] Lakin J R.
Therefore, it is significant to investigate and optimize the graphitization process of amorphous materials for improving graphite properties, reducing energy consumption and promoting industrial production, such as magnesium electrolysis.
The factors affecting graphitization process of carbon materials include temperature [[] Weisenberger M, Martin-Gullon J, Vera-Agullo J, et al.
Study on the preparation and properties of graphite anode for magnesium electrolysis.
Besides temperature, another important factor that influents the graphitization of carbon materials is the coexistence.

Mechanical properties and construction of the forming mechanism of these types were verified under the static load.
Design and construction phase for cable domes is more, complex conditions, multiple factors.
Errors lead to the final molding of the prestressed values ​​and ideals of deviation, the mechanical properties of the structure have been changed to some extent.
Wind tunnel test model needs scale, whose environmental factors to be considered was not comprehensive enough.
Air temperature model study, structure and component temperature study, high temperature mechanical properties of the overall structure study, the whole stability study and fire resistance study for cable dome structure are necessary.

Introduction Owing to its excellent properties, diamond is widely used in the industry, for cutting and polishing tools.
Nanocrystalline diamond has been investigated, due to unique properties of nanocrystalline diamond [3].
Effects of nitrogen addition on the properties of synthesized diamond films on WC substrate The nanocrystalline diamond films on the WC substrate were obtained using a mixture of high-purity acetylene and oxygen gas with nitrogen gas added.
Consequently, nitrogen is a very important factor for diamond nanocrystallites synthesis.
Singh, Microstructural and Biological Properties of Nanocrystalline Diamond Coatings, Diamond and Related Materials 15 (2006) 1935-1940

The parameter Kt is the orthotropic strength factor which is a function of the composite mechanical properties by the following expression:           lt l lt t l t G E E E K 2 21  (2) Where, El is the Longitudinal Elastic Modulus; Et is the Transversal Elastic Modulus; vlt is the Longitudinal Poisson Ratio; and Glt is the In-plane Shear Modulus.
These properties should be the ones for an orthotropic material.
Mechanical properties were measured according to ASTM D3039.
The measured physical and mechanical properties of the laminate are shown in Table 1.
Stiffness matrix calculus was made from mechanical properties announced in Table1, in order to have good accuracy in computational results.

Introduction Slump disaster is commonly mountain disaster, which usually cause heavy loss of life and property of human [1][2].
In particle flow models, a material constitutive property is simulated by the contact constitutive model [4,5].
The value of friction factor see table 1[8].
So the friction factor of undersurface of mound trough and sliding surface is set to 0.1, and the friction factor of surface of accumulation is set to 0.3.
The viscosity damp coefficient affect the translation velocity, rate of rotation of viscous particles and the impact force to the detection wall.