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The subtropical humid mountain climate and main geographical conditions of mountains and hills are the natural causes of the production mode of forests and grains, as well as the settlement distribution of large scatters and small communities.
However, with rapid urbanization, Dong settlements in the rural environment exhibit a number of evolutionary trends.
Having initial comparative advantages in location, time, market, fund, and regional policy, a number of central settlements commenced the primary urbanization process of industrialization and population gathering, leading to space alienation of the settlements.
With the gradually increasing gap between urban and rural areas, urban development provides a large number of employment opportunities.
Through analyzing a number of typical cases, the present paper summarizes the basic characteristics of modern evolution of the Dong rural settlement and the underlying causes, and proposes a three-in-one strategy framework for rural settlement protection and development: industrial adjusment, social transformation, and space reconstruction.

Grain size & chemical composition of above steel has been precisely specified with upper & lower values to optimize the mechanical & creep properties.
The ribs are provided with a number of circular holes for proper communication with sodium.
The CSS consists of top plate and bottom plate interconnected by number of vertical stiffeners.
A number of cutouts are provided in the top and bottom plates and in vertical stiffeners to enable access for welding to all regions during manufacture and to reduce the total weight without affecting the overall stiffness of the structure.
It consists of top and bottom plates interconnected by a number of tubes called “Sleeve Assemblies” and an outer cylindrical shell.

It is comprised of martensite and compound such as carbides and nitrides, and a certain number of oxides.
Moreover, some ultrafine particles are distributed in grain boundary and on the surface of martensitic.

Thus, in our case, the aim of laser surface remelting is to ensure a fine-grained microstructure with uniform microhardness, which cannot be achieved by other procedures for surface hardening pearlite - ferrite nodular irons.
It is important to accurately define the number of laser beam passages since in all cases that can involve different remelting conditions equal sizes of the remelted area have to be ensured.

Both solutions appeared with a spectral peak around 420°C, which was likely the transition of the zinc oxide colloid to grains due to sintering.
The reason was assumed to be caused by the hydrogen gas, which increased the number of oxygen vacancies.

So the correlation degree can be expressed as: (7) Where, n is the corresponding number of mother sequence and subsequence.
The formation lithology of underground powerhouse area is mainly the gray, reddish medium-grained biotite granite, and the inclusion of shallow intrusion of diabase dikes.

The main disadvantage of this method is the need for a large number of pulses to densify the composite.
Warren, Fiber and grain-reinforced chemical vapor infiltration (CVI) silicon carbide matrix composites, Ceram Eng Sci Proc, 1985, pp. 684-693

Table 1 - Multilevel Factorial Design Factors: 2 (%CNT and Age) Replicates: 3 Base runs: 12 Total runs: 36 Base blocks: 1 Total blocks: 1 Number of levels: 4,3 Assessment of the resistance of the materials.
The values of the relative density and apparent density for the four samples were very close, however, the sample CN4 presented the largest value, indicating a more dense structure, caused probably by the filling the pores and by the better interconnection between the grains of the mix due the presence of the nanotube percentage that showed the best results [14].

Based on model 1, Table 3-1 Number 19 mudstone, moved to No. 11, 12, in the middle of the composite key layer to increase the thickness of the layer thickness of 4m mudstone, and other parameters unchanged.
Physical and Mechanical Parameters of Coal and Rock No Description Bulk Density kg/m3 Thick (m) Elasticity Mpa Poisson's ratio Compressive strength Mpa Tensile trength Mpa M S 11 Mudstone 2240 2.76 4000 0.28 10 0.184 1.57 0.029 10 Siltstone 2432 5.02 4500 0.22 10 0.32 1.80 0.04 9 Coal 7-1 1540 1.05 1000 0.36 8 0.032 1.0 0.004 8 Mudstone 2240 0.9 4000 0.28 10 0.184 1.57 0.029 7 Coal 7-2 1540 0.6 1000 0.36 8 0.032 1.0 0.004 6 Siltstone 2432 0.52 4500 0.22 10 0.2 1.80 0.04 5 Carbonaceous mudstone 2341 1.06 4500 0.30 15 0.20 1.75 0.039 4 Fine-grained sandstone 2632 1.36 10000 0.2 94 1.08 7.0 0.08 3 Mudstone 2241 0.86 4000 0.28 10 0.184 1.57 0.029 2 Coal 8 1540 10 1000 0.36 8 0.032 1.0 0.004 1 Mudstone 2240 6 4000 0.28 10 0.184 1.57 0.029 (a) Module 1 (b) Module 2 Fig 1 FLAC3D Numerical simulation model 2.

However, due to the melting effect of small-size grains, the eutectic point of Ni-Si can begin to form at a temperature lower than 993 oC.
Acknowledgment This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No. 2010-0027664), WCU(World Class University) program through the National Research Foundation of Korea funded by the Ministry of Education, Science and Technology (grant number: R32-20093), and the Brain Korea(BK) 21 Project for supporting a fellowship.