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Size of grains or as small as dust pollution can be as solid particle size.
The low Reynolds number is chosen due to suitability for governing equation that valid for laminar flow and dependency of Grashof number .
Reynolds number can be defined as in equation (8)
Fig. 5: Particle removals triangular cavity at different Grashof numbers at Re=50 Figure 6: Particle removals from semicircular cavity at different Grashof numbers at Re=50 In term of buoyancy effect, it can be more clearly at very low Reynolds number when there is heat addition under floor of cavity.
The lower Reynolds number is chosen because the Grashof number which is made the buoyancy force is not influenced any more while at high Reynolds number shows that the percentage of removal are same for all cases with different Grashof number.

The rebound hammer SilverSchmidt L and Original Schmidt N was used for determining the rebound number.
Rebound number area charts of all experimental panels were created in order to identify most damaged areas of the concrete due to the effects of elevated temperatures.
We used quartz aggregate with a maximum grain size of Dmax = 16 mm.
At each point of the grid, 10 valid readings of the rebound number were taken for both hammers used.
On the basis of these measurement results, area charts were created showing the rebound number of concrete in the individual points of the grid.

Grit size #800 of the abrasives containing of the average abrasive grain diameter of 19 μm while the grit size #2000 of abrasive belt containing of the one of 7.5 μm are heated and then formed by the epoxy as pyramid arrays in Fig.1 The average pitch of the array is 500μm and the height of the pyramid is about 300μm.
The dynamic friction coefficient of grit number #800 is convergent to 1.3 while the one of grit number #2000 is convergent to 5.0.
The dynamic friction coefficient of grit number #800 is convergent to 1.3 while the one of grit number #2000 is convergent to 5.0.

The processing parameters: Background vacuum of sample chamber is 5×10-3Pa, accelerating voltage of electron beam is 25keV, target polar distance is 80mm, pulse numbers is 10, 15 and 20 respectively, pulse frequency is 0.1Hz and the beam spot size is 60mm.
It can be seen that the surface morphology of pure magnesium is similar to that of AZ31B magnesium alloy, and pulse numbers impose obvious effects on surface morphology.
Fig.2.AZ31B magnesium alloy surface morphology after irradiation for 10 times Morphology of the modified layer Fig.3 gives the morphologies of pure magnesium and AZ31B magnesium alloy on cross-sectional view under irradiation at the same energy density but for various pulse numbers.
Grain boundary in the melt layer disappears in that the rapid melting and solidifying hinders the growth of crystalline.
Conclusions The surface of pure magnesium and magnesium alloy exhibits similar undulating morphology after HCPEB treatment; pulse numbers impose obvious effects on surface morphology.

In this case the correlation function and the spectral density have the form , , (8) where , is the correlation wave number of the random function ( is the correlation radius).
They have the form of two peaks in the point of , (9) where , , and are the wave number and the frequency corresponding to the intersection of the initial dispersion curves.
Let us consider now the limiting case (the model of independent grains with random values of coupling parameter in each of them).
So, the number of peaks in the dependences and increases and the amplitudes of these peaks decrease with each following approximation.
Three first approximations of the solution of these integral equations for the arbitrary values of the correlation wave number of inhomogeneties as well as their exact solution for the limiting case of are studied.

But in recent years, as the number of training personnel increases, model types and quantity is seriously insufficient.
The mode use is restricted by a large number of site occupancy.
The management for file number or file name can’t accurately reflect the model and express model characteristics.
After class, Students can enter into the problem chapter and can go self-evaluation Practical realizability It is difficulty to practice for teaching engineering drawing because a large number of model and the maintenance of the model is need.
References [1] CHEN Xue-ling, LI Li, WANG Xing-jian, Research on the application of VRML in the virtual model base of engineering graphics, Journal of Chengdu University of Technology,32（2005）,407-409 [2] WANG Xiao-jing ,Investigation of foundation for engineering graphics 3D parts library, Journal of Jilin Grain College,20（2005）,10-13 [3] ZHAO Guo-xia,ZANG Yi-juan, The Model Library Development of Descriptive Geometry Based on Pro/ENGINEER, Mechanical & Electrical Engineering Technology,39（2010）, 83-86 [4] SHEN Rong-feng, Designing the virtual model database of engineering drawing by VRML, Journal of Fujian Agriculture and Forestry University ,36（2007）.215-218

The obtained constants can be used to calculate the average concentration of ammonium ions in the solution and in the grain of the sorbent in the process of integrated adsorption process.
The optimization condition for the integrated process has the form (1) where n – the number of stages of the integrated process (for the studied integrated adsorption process n = 2); Р – optimization parameter (minimum time of implementation of the integrated process, minimum consumption of sorbent, minimum cost of cleaning technology, minimum energy costs, etc.).
Analysis of the results of experimental studies has shown that the intensity of adsorption in the direction of its reduction of the studied sorbents can be placed in a number: natural zeolite Þ paligorskite Þ glauconite.
The obtained constants can be used to calculate the average concentration of ammonium ions in the solution and in the grain of the sorbent in the process of integrated adsorption process. 5.

This text combines the construction of the express line of a mountain City to be the advantage that the road faces the grass-roots material and applied the scope, economic performance...etc. to make some studies for the coal stone. 1 Introduction Pingdingshan is the city of emerging coal industry , Coal industry produced a large number of coal over the years, It is not only take up a lot of land, but have a significant adverse impact on the urban environment.
Meanwhile, the city still has 1.2 million kilowatts of Yao Meng plant which producing a large number of fly ash.
The consists of Fast-track pavement structure: According to requirements of traffic volume and road grade which compare to Pavement Strength, Combining not only the distribution along the climate, geology, hydrology, and road construction materials,but also road experience and local funds in pingdingshan, Fast lane asphalt pavement structural design as follows: Surface layer: 3cm of fine-grained asphalt concrete (AC-13I)       4cm of asphalt concrete in the grain (AC-16I)       Asphalt Seal Coat Basic level: 18cm of 5.5% cement stabilized crushed stone Sub-base: 36cm lime, fly ash stabilized coal (the old road non-sub-base) The total thickness of pavement is 61cm (the old road is 25cm) 3 Economic analysis of Two ash stability coal stone 3.1 The physical and chemical properties of coal stone Coal stone Is the by-product of coal mining, its Calorific value is 1000 to 2000 kcal / kg or so.

The uniform prior density was used in all the cases by dividing the total number of electrons by the volume of the unit cell.
Table 3: Parameters obtained from MEM for cadmium sulphide Parameter Value Lagrange parameter (λ) 0.0279 Number of cycles 459 RMEM (%) 0.0274 wRMEM (%) 0.0266 F000 256 Prior density (e/Å3) 1.2761 Resolution at a (Å/pixel) 262144 (64 × 64 × 64) The 2D representations of the electron densities of cadmium sulphide are shown in figs. 3(a) and 3(b) for the (001) and (110) planes.
The particle size can be calculated using GRAIN [22] software.
Saravanan, GRAIN software, www.saraxraygroup.net [23] Pankove has the same equation, but with an apparently different prefactor a however, in the Pankove version, the units dimensional analysis appears.

However, the total number of people who have realized the benefits of the automobile is still only a small portion (800 million) of the global population (approximately six billion).
A rapid expansion in the number of automobiles is expected with the future economic growth in Asia[1].
Fine grain structure with few defects and good thermal fatigue strength is secured by applying this technology.
Cooling Water Cooling Water Cylinder Head Core Mold Riser Cooling Pipe Ladle Lower Die Tilt Pouring Cooling Water Cooling Water Cylinder Head Core Mold Riser Cooling Pipe Ladle Lower Die Tilt Pouring Next, a new method, called direct cooling casting, was developed, also to produce a fine grain structure.