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Fractal geometry mainly researches the uncertainty factors of nature, while the idealization of natural conditions is the foundation to constitute all rock mechanics analysis and geotechnical engineering design.
Fractal model method: The appear of irregularity complex phenomena of any structure(systems), is caused by the environmental conditionit of its physical, mechanical and its microstructure factors, while investigated from mathematics, this is just a kind of geometry.
Microstructure fractal of soil: The engineering properties of soil and its material composition, microstructure are closely related.
The granularity composition often play a larger part in studying material composition, and determines the physical and mechanical properties of infiltration, deformation, intensity of soil, thus granularity(particle gradation) is often as the main index of soil engineering classification.
Fractal dimension on the joint surface: In rockmass mechanics, the morphology characteristic of joint surface is the important factors to control the rockmass mechanics behaviour, formerly it is charactered by the average wavilness angle and surface roughness coefficient JRC of joint surface.

Engineering geological properties of overburden strata of No.8 seam According to the data of boreholes,the thickness of overburden strata in studying area generally was 0-90 m, consisting of strongly to slightly weathered sandstones and mudstones.
The weathering zone was 11.95-60.02 m in thickness and 27.51 m in an average thickness.The strong-weathered zone was about 17.54 m while weak-weathered zone was about 9.97 m.In investigation and analysis of engineering geological properties of overburden strata, four major factors were considered as follows.
Table 2 Structure of overburden strata of No.8 seam Borehole Thickness of seam (m) Thickness of overburden strata(m) The pillar size is 20m The pillar size is 30m The pillar size is 40m Arenaceous rock (%) Argillaceous rock (%) Arenaceous rock (%) Argillaceous rock (%) Arenaceous rock (%) Argillaceous rock (%) W 1 6.38 20.40 70.90 29.10 / / / / W 2 8.56 49.19 84.00 16.00 83.40 16.60 81.50 18.50 W 3 2.81 22.98 91.10 8.90 / / / / W 4 5.19 56.85 95.70 4.30 82.80 17.20 87.10 12.90 W 5 4.28 13.55 91.50 8.50 / / / / Average 5.44 32.59 86.64 13.36 83.10 16.90 84.30 15.70 Mechanical properties and water physical properties of rock.
Nine groups of rock samples were taken for testing mechanical properties and water physical properties, as shown in Table 3.The results indicated that as follows: (1) No matter what the lithology,dry saturated water absorption of rock without weathering was less than 3 per cent.The type of disintegration was cracking.
Conclusions Taking Xiyi area as an example,we analyzed the influencing factors of the types and the heights of coal pillar during shallow coal seam mining under the loose aquifer.

B.The Robustness of the slag Concrete aggregate consistency is defined by its climate, changes in the environment or other physical factors to resist breaking ability.
Therefore, from the mechanical properties of titanium steel slag as coarse aggregate view can be used for preparing a wear resistance of cement concrete.
The selection of the coarse aggregate The coarse aggregate is an important part of the concrete, is also an important factor affecting the strength of concrete.
[3] P.Y.Zhou, Steel slag powder reactive powder concrete composition structure and properties of[D].
[6] W.J.Tang, Slag and steel slag composite powder on cement and concrete properties influence experimental study [D ].

One of the ways to solve this problem is the use of composite binders (KV), which allows to exclude a number of additives from the composition of the mixtures, as well as to provide the required physical, mechanical and rheological properties along with a decrease in the cement content.
Properties of CDM directly depend on the raw components included in their composition.
Thus, the change in rheological characteristics depends on the Genesis of the quartz component and affects the structural and mechanical properties of mortar mixtures.
The choice of factors and parameters of optimization was made on the basis of technological and economic feasibility.
I. evaluation of the effect of quartz of different origin on the properties of the VNV [Text] / A.I.

Realize the property of cutting force.
Determine the input and output factors & Hardware setup.
The output factors in the training data set were the tool good or broken.
Input and output factors of TNITBM system Figure 3.
The value of output factors was used to judge the tool conditions.

We surveyed literature and proposed a procedure to identify the fatigue properties from the Brinell hardness and Young's modulus.
Fatigue lifetime prediction of welded joints Relations between mechanical and fatigue properties.
[HB.()N()HB.( E − − +− −+ + + = ε∆σ (5) FE model and fatigue notch factors.
The obtained stress concentration factors, tK , by FE analysis and fatigue notch factors, fK , by Peterson's formula [4,5] are shown in Table 1.
Calculated stress concentration factors and fatigue notch factors Specimens Butt-weld TN NCN CN tK / fK 1.60/1.52 2.71/1.63 3.64/1.93 4.22/2.40 FE analyses of residual stress and residual stress relaxation.

Dielectric Properties of BaTi5O11 Ceramics at Microwave Frequencies Cheng-Hsing Hsu1, a, Wen-Shiush Chen1, Hsin-Han Tung1, Pai-Chuan Yang1, and Jenn-Sen Lin2 1Department of Electrical Engineering, National United University, No. 1 Lien-Da, Kung-Ching Li, Miao-Li 36003, Taiwan 2Department of Mechanical Engineering, National United University, No. 1 Lien-Da, Kung-Ching Li, Miao-Li 36003, Taiwan ahsuch@nuu.edu.tw Keywords: Microwave Dielectric Properties, BaTi5O11 Ceramics, Sintering.
The compounds in the binary system of BaO–TiO2 have been reported to possess excellent microwave properties.
The increase in density may directly affect the microwave dielectric properties.
Conclusions The microwave dielectric properties of BaTi5O11 ceramics were investigated.
Compared to previous reports, a significant improvement in the dielectric properties and sintering conditions has been accomplished.

This has an important implication for technological properties.
The T/P24 steels exhibit higher mechanical properties in comparison with the base steel, and can be used in the advanced power industry.
The presence of large angle boundaries may be a positive influence on mechanical properties, in the case of cracking, by inhibiting the relocation of the front of the crack.
Undeniably, one of the most significant factors exerting influence on the morphology of the forming phases is the cooling rate.
Another factor exerting influence on the morphology of bainite is the size of the prior austenite grains, observed to be very different.

These materials enhance mechanical properties, improve durability, and reduce environmental impact.
The rough surfaces of the particles can be observed, showcasing pores and microfissures that influence the cement's mechanical properties and hydration kinetics.
This might explain better mechnanical properties of this sample.
The SEM also show agglomeration of smaller particles into larger clusters, which can influence the packing and mechanical properties of the final composite material even when MW combined with CC Fig. 5-d&e.
Properties of ash generated during sewage sludge combustion: A multifaceted analysis.

During the aging process, two factors react.
The combination of the two factors improves the strength and superelasticity of the specimens till the over-aging arises corresponding to the 72h aging duration.
Xu, Factors affecting recovery stress in Fe–Mn–Si–Cr–Ni–C shape memory alloys, Materials Science and Engineering: A 528 (2011) 1125-1130
Chumlyakov, The effect of nanoprecipitates on the superelastic properties of FeNiCoAlTa shape memory alloy single crystals, Acta Materialia 61 (2013) 3445-3455
Abrudeanu, Characterization of the mechanical dissipation in shape-memory alloys during stress-induced phase transformation, Journal of Materials Science 3 (2013) 1-5