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The results is showed that the similar materials of the heavy grain of sand, the heavy crystalline powder, the river sand, the flour, silty sand have the similar physical properties with the Bai Jiabao Landslide and that they are used as materials to simulate the landslide in the model test are suitable.
Although uniform design can save amount of work and save time, it doesn’t have a good guarantee of test precision.Now the general remedies is that by analyzing the result of test; finding the sensitive performance of materials, and then increasing the number of tests.
A large number of practices indicates that it brings good effect[6].
Table 2 The uniform design of similar materials(%) test number silty clay barite fly ash floor wax water 1 57 12 9 12 10 2 38 24 18 10 10 3 40 36 6 8 10 4 63 6 15 6 10 5 65 18 3 4 10 6 46 30 12 2 10 Table 3 The results of the uniform design test number performance density (g/cm3) cohesion (kPa) angle of internal friction（°） coefficient of permeability（cm/s） 1 1.755 8 20 1.80×10-6 2 1.84 5 27 1.76×10-6 3 1.996 2 28 1.36×10-6 4 1.839 44 21 4.41×10-7 5 1.994 42 19 7.73×10-8 6 1.994 26 25.5 7.79×10-6 Table 4 The uniform design of similar materials(%) test number barite sand standard sand flying powder talcum powder floor wax clay expansive soil water 1 50 45 5 2 50 45 5 3 50 45 5 4 60 10 20 0.5 9.5 5 20 60 10 10 6 10 60 20 5 5 7 10 50 20 10 10 8 20 50 20 10 9 30 40 20 10 10 40 30 20 10 11 45 30 15 10 12 45 20 15 10 10 13 45 15 15 15 10 Table 5 The results of the uniform design test number performance density (g/cm3
It not only can greatly reduce the number of trials, save time and meet the accuracy of test results,but could analyse of the sensitivity of the material on the physical and mechanical properties when selecting the reasonable method to guide the the test.Then it could provide a basis and reference to the future physical model test.

The number of samples produced was usually two specimens for one cycle.
Also, it was confirmed how the grain size had a marked effect on the behaviours of the manufactured materials.
The diverse grain sizes were able to recognize because of the matrix grains were bordered by the reinforcing phases.
This grain border phenomenon was general in all the manufactured composites.
Therefore, the accumulation of the reinforcing phases as border between grains caused brittle fractures.

Threshing is one of the most critical crops treatment operations to separate grains from the ears and making them ready for consumers [1].
Buckingham’s π theorem was used to reduce the testing time and number, simulate and predict by the machin's threshing efficiency.
Kutzbach, Modeling and simulation of grain threshing and separation in threshing units—Part I, Comput.
Kutzbach, Approaches for mathematical modelling of grain separation, in International Conference on Crop Harvesting and Processing, (2003), pp. 64
Ndirika, Modeling the performance of selected stationary grain threshers, Unpubl.

The surface site of the crystal formation evolves perfectly with hexagonal structure seen along the grain boundaries. 1 Introduction The improvement in material quality, effectiveness, and prolonged service usage has been in demand lately due to the cost and challenge of the component's maintainability [1].
The grain crystal proves to be influenced by the alteration of diffused crystal particulate participation from the electrolyte.
Good coating bonding energy between the constituent particulate provides a solid crystal structure, and an average grain atomic phase pattern is seen from all indications.
Applied surface science electrodeposition of nanocrystalline Zn/Ni multilayer coatings from single bath : Influences of deposition current densities and number of layers on characteristics of deposits.
A comparative study on the tribological behavior of nanocrystalline nickel and cobalt coatings correlated with grain size and phase structure.

Introduction In recent years, an increasingly larger number of research in many countries is devoted to titanium, hafnium and zirconium diborides, the members of a family of materials with extremely high melting temperatures, high thermal and electrical conductivity, excellent thermal shock resistance, high hardness and chemical inertness.
In particular, gold not only wet well the ZrB2 but also can penetrate along the solid grains, as shown in Fig. 2.
Moreover, tiny Au drops, found on top single boride grains (Fig. 3), allow an evaluation of the “true” contact angle on a “smooth” ZrB2 surface.
a) b) Fig. 2: a) Au penetration along ZrB2 grains at the surface; b) Au map.
Microscopic contact angle of Au on a ZrB2 single grain However, the extent of this effect is different for the various metals.

Powder size distribution method ensures a maximum level of compactness by strategically distributing minute grains into the vacant spaces left by larger grains, emphasizing its efficiency in achieving a comprehensive and well-distributed powder size range.
The energy of the laser is quantified through energy density, and to establish this relationship, the ANDREW-NUMBER prescribes specific parameters.
Hatch spacing: In a study by Joseph Pauza et al. conducted in 2021, tests demonstrated that an increase in hatch spacing and layer thickness resulted in the disintegration of grains.
The minute grain size exhibits angular characteristics attributed to inadequate melting of pool [20].
Heat treatment techniques that reduce the grain boundary energy state, without altering the grain size, can minimize resistivity, particularly in ultrafine-grained materials.

A set of fine-grained sediments dominated by deep lake facies black mudstone and oil shale developed, which is the main source rock of the basin.
Most of them are isolated (Fig. 3a); Dissolution pores mainly occur in the interior of particles, and the dissolved materials are mainly feldspar and rock debris (Fig. 3b); Reticular and hairy illite develop a certain number of nano pores (Fig. 3c and Fig. 3d).
Through the analysis of the lithology, electrical property, physical property and oil-bearing property of the reservoir in the study area, it can be seen that the oil and gas display of meandering river sand body is the best, the cumulative number of industrial oil flow and low production oil flow wells reaches 40%, the number of oil-bearing wells reaches 35%, and the number of oil-bearing wells is 5%; the second is the distributary channel sand body.
The cumulative number of industrial oil flow and low production oil flow wells reaches 25%, the number of oil reservoir wells reaches 24%, and the number of display wells accounts for 1%; The degree of oil and gas display of underwater distributary channel and crevasse fan sand body is weak, and the cumulative frequency above oil and gas display level wells is less than 7%.
Crevasse fan is mainly siltstone and argillaceous siltstone with fine grain size and poor physical properties, which is difficult to form an effective reservoir.

., Japan), and (iv) ball clay (Seto, Japan) as the binder to enhance the green strength and (v) MgO as the sintering aid and grain growth inhibitor.
The number of spherical pore is counted from the SEM micrographs along the radial direction (Fig.6).
In the case of 10vol.% PMMA, no grain growth of alumina particles is observed and continuous but sub-micron pores, as open pores, are predominant in alumina samples sintered at lower temperature.
It is observed that the porosity of specimen with the same PMMA additions varies with the number of laminate layers.
It is because the radial gradient of Young's modulus introduced in Eq. 2 varies with the number of laminated layers.

So the fluid force on particles was combined by frictional resistance and pressure resistance, considering particles per unit volume in the x direction by the force balance can be obtained: (1) Where, i is the particle number, xj is the axis, is a collection of particles size (m3), Pis the low field of the pressure value (Pa), np is particles for the total particle set number, dpi is number i particle size (m).
Fig. 5 Orifice flow over time Fig. 6 Loss of grains over time According to the amount of particles drain orifice.
Fig. 8 Flow under various pressures Fig. 9 Loss of grains with time Loss of orifice particles.
Figure 9 shows the amount of drain particles from orifice over time, can be seen from the chart, under the action of different loading mode function, the amount of drain particles can reach a stable state eventually, the larger the load classification number is, the longer the time required to reach a stable value.
The larger the load classification number is, the smaller the final amount of drain particles, means that the velocity of the water flow and flow force decreases with the increase of load classification number.

Stickiness may seriously hamper vehicles operating in wet, fine-grained soil.
Stickiness occurs in all fine-grained soils when they are wet.
age Numbers.
Do not number your paper: Permanent wooden roads – fascine causeway.
The equations have to be numbered sequentially, and the number put in parentheses at the right-hand edge of the text.