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In recent years, with the amount of soil erosion increasing year by year, soil and water erosion has become the key factors affecting the regional ecological security and the ecological environment problems to be solved [4].
There are few scholars to study only on the compressibility of soil, more reflect the compactness using compressibility index, for research and study on the influence of the compactness on the mechanical properties of soil.Song Weifeng et al [5] studied the frictional characteristic between root system and soil; they found that the friction coefficient on root-soil interface increased with increase of density of soil.
The basic physical property indexes of purple soil in table 1.
Table 1 The basic physical property indexes of purple soil specific gravity Gs Liquid limit WL/% plastic limit WP/% plastic limit index IP/% particle size composition (%) ≥2 2~1 1~0.5 0.5~ 0.25 0.25~ 0.075 ≦ 0.075 purple soil 2.69 24.94 13.84 11.10 28.32 12.47 13.99 21.75 11.89 11.41 According to the liquid plastic limit of soil, making the initial water content were 12%, 14%, 16%, 17.76% (natural water content), 20% of the samples, using scale weigh soil samples of 1500 g, calculating the water added in soil samples, add water and mix them together, and put into the black opaque sealed plastic bag for 24 h.

Hence solids like tin oxide (SnO2) whose electrical properties are affected by the presence of a gas-phase or liquid-phase species have drawn attention of numerous researchers to fabricate prototype sensing devices.
Each state has its own unique properties and characteristics that can affect sensor performance.
Nano- and polycrystalline materials are very complicated objects for study, because the electro-conductivity of these materials depends on a number of factors [4, 13-16].
Consequently, the material exhibits different physical properties.
Particle morphology is influenced by the factors such as supersaturation, nucleation and growth rates, colloidal stability, recrystallization and aging process.

Parameter K defines the slope of a sudden drop on load vs. diameter reduction diagram and it is often denoted as “accelerating factor”.
Table 1 Chemical composition of tested steel (in weight %) C Si Mn P S Cr Mo Ni Cu Al 0.22 0.21 0.86 0.018 0.011 0.42 0.83 0.92 0.05 0.015 Static mechanical properties of steel determined by tension on a smooth specimen 
5 mm at 0°C are as follows: Rp0.2 = 476 MPa, Rm = 620 MPa.
CONCLUSION It has been found that the microstructural aspect significantly affects ductile fracture initiation.
Stable crack growth cannot be exactly predicted without modification of the existing FE mesh, which is a limiting factor of this procedure for the time being.
Brocks, "Numerical Round Robin on Micro-mechanical Models - Results", ESIS TC8, GKSS Research Center, Geesthacht, (2000)

All the current CPCs are reported to have good mechanical properties and reasonable setting times.
A A The mechanical properties of biomaterials depend of a number of factors.
The mechanical properties of these reticulated polymers were compared with their swelling capacity.
These materials present rather low intrinsic primary mechanical properties.
However this study cannot confirm that the mechanical properties of sound bone were reestablished.

Recently, bulk nanostructured WC-Co materials where WC particles of <100 nm embedded in Co matrix exhibit enhanced mechanical properties including hardness and wear resistance [1], compared to conventional micron-sized materials.
The formation of these additional phases adversely affects hardness, toughness and wear resistance.
Consequently, major factors affecting the final phase distribution of the sprayed coatings are (i) chemical composition, size and morphology of the feedstock powder and (ii) spraying condition, particularly spraying atmosphere and spraying parameters.

A, B, n, C, m are five parameters showing the factors affecting the von Mises flow stress.
First, spectrometry and tensile tests were carried out in order to find the chemical composition and mechanical properties under quasi-static loading, with the result as shown in Table 1.
There is a positive correlation between properties under quasi-static and high strain rate tests.
Kawata, Carbon content effect on high-strain-rate tensile properties for carbon steels.
Qin et al., Experimental study on mechanical properties of three steels.

Some alloying elements, which tend to segregate, make the as-solidified dendritic microstructure prone to hot cracking and then require well-controlled cross-reductions during subsequent rolling or thermal-mechanical treatment to homogenize microstructure and get optimum properties.
The effect that an alloy's segregation behavior has on its final properties is the reason why semi-solid and post solidification hot rolling processing conditions are an important subject of R&D for innovation and refinement of industrial processes.
In all three cases, the casting process is followed by a hot deformation step, in particular hot rolling, to control the necessary geometrical, mechanical, technical and physical properties of the flat products.
The austenite grain size influences the hardening and softening behaviour of the slab material, while being simultaneously affected by the solute state of the as-solidified slab and related precipitation kinetics.
The laboratory simulation must take into account the mentioned factors and their influence on the deformation process in compliance with the characteristics of meting / solidification and then time-temperature-deformation cycles of the real process.

Bell, Maximum temperature difference in a single-stage thermoelectric device through distributed transport properties, Int.
Choi, Optical properties and swelling of thin film perfluorinated sulfonic-acid ionomer, ECS Trans. 92 (8) (2019) 197
Parametric study of major factors affecting heat transfer enhancement in a circular tube with vortex generator pairs. 
American Society of Mechanical Engineers
A Study of the Chemical and Physical Properties of Cane as a Biofuel After Thermal Treatment Processes (Tarification).

Monofunctional monomer has only one active group with lower molecular weight and viscosity properties, which also has the strongest dilution, low curing speed and toxicity.
It has good dilution effects and curing speed which help to improve the physical and mechanical properties and corrosion resistance of cured film[3].
The method of uniform design was used to configure the based ink tests and D95 particle size was regarded as an index.There are a total of three factors.
The monomer factors have 12 levels, as shown in Tab.2.
Since each of these factors will have an impact on the experimental results.

Zhang1 1National Engineering Research Center for High Efficiency Grinding, Hunan University, Changsha, China, 410082 2College of Mechanical & Engineering, Xiangtan University, Xiangtan, China, 411105 aedeng0080@vip.sina.com,bpzpalass@163.com,cmeishanzi@sina.com Keywords: PDC cutter, Interrupted cutting, Temperature field, Finite element method Abstract.
According to machining properties of materials and working conditions, on the basis of the theory of thermal equilibrium of moving thermal source, the paper established the mathematical model of temperature field of interrupted cutting used the PDC cutter through reasonable hypothesis.
Introduction Cutting temperature is an important physical index in cutting process, and is an important factor that affects the wear and life of cutters, surface integrity and processing quality of products.
Thus, the cutting heat only affect the temperature rise of materials near the surface, and the temperature varied wildly along the normal direction of the grinding surface.
Sun and et al: China Mechanical Engineering, Vol. 13 (2002), p. 1608.