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These materials in the form of bulk nanostructured structures or films have become important in many technologies due to their improved physical, chemical and mechanical properties [2, 3].
The factors influencing the hardness of coatings included grain size, internal stress and the cavities.
Based on previous studies, the formation of passive layer on the surface is one of the factors that affect the corrosion properties of nickel coatings.
Al-Hadhrami, Microstructure and surface mechanical properties of pulse electrodeposited nickel, Appl.
Erb, Electrodeposited nanocrystals: synthesis, structure, properties and future Applications, Can.

Developed materials were further analyzed by various methods: monitoring changes in an observation furnace, physical–mechanical (to determine strength properties), physical-chemical (phase composition - XRD) and microstructural (SEM).
Due to these factors and the current availability of suitable alternative raw materials, heating plant slag was chosen for the modification of the binder.
Potentially suitable properties that suggest agloporite for application in mortars with assumed thermal durability are presented by Černý in [6].
In addition, a change of specimens (for testing of physical-mechanical properties) was assessed by visual observation after 22, 600, 1,000 and 1,200° C exposures.
Fındık: Several properties of mineral admixtured lightweight mortars at elevated temperatures, Fire and Materials, 37 (5) (2013), p. 337–349

The emphasis of experiment is shooting factor(well depth, dynamite), at the same time, the experiment of instrument factor and receiving factor has been carried out to choose the best shooting factor and receiving parameter.
The main interference wave affecting deep reflection is refraction, mutiple refraction, high apparent velocity, strong energy and long continuity.
To these problems, Some scholars at home and abroad have conducted research:[1,4]Applying three- dimensional seismic exploration locates geological structure and coal seam property affecting coal layers mining in the east of Lvliangshan foothill in the middle of shanxi province.
Fig.1 Topography and geomorphology in research area Fig.2 Low velocity zone of D4 point (2) The seismic geology condition of deep layers.The deep layers have been affected by reverse fault(F5) from Qinglong mountain and the reverse fault(F4) from Mengchen to zhangjia mountain.The depth of coal seam varies largely(range from 300m to 850m), and dip changes largely(reach 30-80°).
Test equipment and test scheme Test equipment.(1) Equipment and the choice of factors.instrument types: 428xl digital seismograph; record format;SEG-D; sampling interval;1ms; recording frequency band; whole bandwidth; record length; 2.0 s; playback record filter; decided by experiment.(2) The choice of observation system.receiving lines: 2 lines; arrangement manner: linear type; receiving channel number: 2*200; channel interval: 10m; excitation type of shot point: intermediate fired.(3) The factor of excitation.seismic source: high detonation speeded-up explosive cylinder, detonating electric detonator flashily, excitation of single well or multi well; the method of pore-forming: simple mechanical drilling, artificial water drilling, luoyang spade, pneumatic drill in bedrock exposed region in gully.(4) The factor of reception.geophone: 10Hz, 60Hz; composition forms: three poles cascade two poles and gather together Test scheme.(1) Position of experimental point.The experimental purpose

Three essential factors must coincide for HAC (or more specifically SSCC) to occur in socket welds: 1.
Material in a susceptible condition (microstructure produced by thermal mechanical processing history, i.e., high hardness in the weld or heat-affected zone (HAZ) due to un-tempered martensite).
However, in any specific situation or application, the relative importance of each of these factors will differ.
In the case of socket welds, it is primarily the properties of the HAZ and exposed root weld metal that will affect material susceptibility to SSCC since these regions of the weld will have the highest strength and more susceptible microstructure.
Effects of the Socket Welding Process Proper design of the socket welding process takes into account many factors, including the geometry of the joint.

The article discusses Scheffe's simplex-lattice planning method using the example of describing the dependence of the properties of a mixture by a second-order polynomial [4].
Factors and levels of their variation i Factors xiн xi 1 The amount of preliminary residual deformations εн, [%] 1 -1 3 1 2 Maximum cycle voltage σmax, [MPa] 1080 -1 1280 1 The value of the preliminary residual deformation xin was set according to the deformation diagram P – Δl with a scale of 1: 80 (Fig. 1).
For the convenience of processing and interpretation of the experimental results from the natural values of the factors xin we went over to the dimensionless xi, while for the factors with equally spaced levels, the coefficients of the orthogonal Chebyshev polynomials were taken [6].
Thermodynamic properties of binary and ternary compounds of CaO-BaO-Al2O3 system.
Mechanical Engineering. (1980) 304 p

Physical and mechanical properties of genies granite Table 1 and table 2 is physical and mechanical characteristic of genies granite which is on saturation conditions.
Table 1 Mechanical index of rock in saturation condition Index Density of rock sample (g/cm3) Compress strength (MPa) Elastic modulus (GPa) Deformation modulus (GPa) Poisson ratio Tensile strength (MPa) Average 2.68 63.6 17.9 22 0.2 4.98 Table 2 Resistance to shear shear(ing) strength of gneiss granite rock Index Coefficient of friction Angle of friction φ cohesion f' (°) (MPa) Average 0.87 41.0 9.6 In-situ geostress conditions in engineering area Geological investigation was carried out in this area in 2007 and in-situ geo-stresses were measured.
So it can prove that stress concentration after excavating is the main affect factor for rock burst in this tunnel.
Rock burst is one complicated geology phenomenon which is affected by many factors, for example in some place of rich underground water and more structure planes, rock burst is often restricted, which had been proved with rock burst from K10+830 to K11+023.
Therefore a synthetized criterion with considering several rock burst factors include underground water conditions, rock mass characteristics, geostress conditions and tunnel shape and excavation method and so on.

The existence of burr will not only affect the match of parts, but also reduce the dimensional accuracy and surface quality of the work piece.
Mathematical model targeted with burr and surface roughness based on the main experimental factors of cutter diameter, cutting depth, spindle speed and feed rate.
Experimental studies indicate that these main factors affect burr generation [4].
It is found that the cutting edge radius, the run-out of spindle and feed per tooth are key factors in the study of micro milling mechanism.
Construction and property analysis of NC micro milling machine system [D], Nanjing: Nanjing University of Aeronautics and Astronautics, 2007.

In prestressed structures, the potential consequences of steel corrosion are much more serious than in reinforced concrete, since strands are subjected to high mechanical stresses, and consequently the combination of corrosion-induced sectional reductions and notch effects can be fatal for structural safety [2,5,6].
The methodology can be used as a tool for structural engineers and asset managers to assess a corrosion-affected concrete infrastructure and make decisions with regard to its maintenance and rehabilitation.
Deterioration of flexural strength of corrosion-affected PC beam is then associated with reduction of the cross-sectional area and tensile strength of the prestressing steel strands.
Statistical properties of the random variables used in the analysis are summarized in Table 1.
Statistical properties of random variables Parameters Mean COV Distribution Reference fc, compressive strength of concrete fp, nominal yield strength of uncorroded strands h0 , effective depth of cross section dc, depth of the concrete cover R, parameter of pitting corrosion D1, dead load (self weight) D2, secondary dead load L, live load Impact factor 48 MPa 1860 MPa Nominal Nominal 5.65 1.02Dn 1.32Dn 1.08 Ln 1.15 0.13 0.025 0.02 0.14 0.22 0.022 0.068 0.041 0.10 Normal Normal Normal Normal Gumbel Normal Normal Lognormal Normal Bartlett and MacGregor [22] Mirza et al. [23] Lu et al

So analysis indicates corrugated steel culvert spreads the upper load better, the geotechnical grille can reduce the pressure effectively through earth pressure redistribution, and the mechanical property of corrugated steel culvert is better than reinforced concrete slab culvert under high fill embankment.
The vibration string pressure cells that transmit signal through frequency are adopted in this test, they have advantages that long-distance transmission generates small errors and the frequency signal are rarely affected by water and other external factors, the measuring accuracy can be reached 0.0001MPa.
Experimental research on mechanical properties of Corrugated Steel Culvert[D].

Glass fiber is an excellent-performance material, and has good insulation property, heat resistance and high mechanical strength.
Therefore, this study uses carbon fiber and glass fiber as reinforcing materials into PU foam solvent, intended to improve acoustic absorbing, thermal insulating and mechanical property of PU composite board via additions of reinforcing fibers.
Burst strength, acoustic absorption, and thermal conductivity properties of organic/inorganic fiber-reinforced PU composite foam boards were finally evaluated.
Although reinforcing fibers affect the nucleation of PU composite foam, acoustic absorption property cannot be influenced.
This is due to two factors.