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Here Do is the overall desirability value, di is the individual desirability value of ith quality characteristic and n is the total number of responses.
Flux used in this experiment is fused type with grain size 0.2 to 1.6 mm with basicity index 1.6 and the chemical composition is SiO2 + TiO2 =30%, CaO + MgO =10%, Al2O3 + MnO= 45%, CaF2= 15%.
(8) Here ‘n’ is the number of measurements, and yi the measured ith characteristic value.

Thus, the initial numbered image of the structure consists of a matrix containing 0 and 1; • treatment of the resultant sets of the digital values (matrices) by division of the matrix to larger cells with the dimensions Li× Li(i=1,..., 32); • construction, for each of division, of the characteristic measure in the form of the probability of distribution of units Ni, required for covering the ferrite field; • the approximation of the dependence of lnPi on lnLi by the method of least squares and the determinationof fractal dimensions Df from the relationship: P(Li) = const×Li-Df, (1) Fractal structure formation analysis and assessment of cold resistance of the weld metal of low-carbon steel for welding with coated electrodes Engaging the concept of fractals allowed to quantify the degree of homogeneity (dispersion, fragmentation) of the structure of weld metal.
Comparison of the values of Df with the topography of the structure shows that for a coarser structure with wide fragments of Widmannstatten ferrite extending through all fields of the grains of primary austenite, the value of Df is lower and the structure is more homogeneous, approaching the conventional ferritic–pearlitic structure, with the higher values of Df.
The distribution density can be calculated more efficiently by counting the number of cells P required to cover the fractal.

A trigger was gotten at a zero-crossing of H in order to average a number of signals synchronously.
X-ray diffraction is sensitive to the local phenomenon of grain deformations by the occurrence of the particular slip line as fatigue and crack initiation.
Fig. 6 indicates the relationship between number of cycle of fatigue test and RMS(root mean square) value for fatigue damage specimens.

Water jet contained abrasive particles of natural garnet of grain size 150 - 300 µm, pressure 3800 bar, nozzle diameter 1.02 mm.
Fig.2: Fatigue S-N curve of Al-alloy with milled and WJM surface Fig.3: Fatigue S-N curve of AISI 4340 steel with ground and WJM surface 400 450 500 550 600 650 700 750 800 10000 100000 1000000 10000000 100000000 Number of cycles Stress range (MPa) Ground surface Water jet impact Water jet outfall 200 220 240 260 280 300 320 340 360 380 10000 100000 1000000 10000000 100000000 Number of cycles Stress range (MPa) Water jet impact Center Jet outfall Milled Regression - water Impact Regression - center Regression - jet outfall 0.15 mmAnalyses of fatigue cracking mechanisms.

The key point in increasing Jc is improving weak link properties of grain boundary and trapping of magnetic field by non superconducting phase in a superconducting matrix.
Thus doping of CeO2 increases the normal conduction region, the number of flux pinning centers and critical current, however the result indicates deteriorate effect on the magnetic shielding.
The result indicates that ∆M is propotional to the number of magnetic flux lines passing through the sample.

Experimental Procedure The pattern used in the study was a step-like shape sized 100×250mm withstep thickness of 3, 6, 12, and 18 and 24 mm (Figure 1) The pattern made of polystyrene foam with a density of 20Kg/m3 was cut using hot wire to an accuracy of ±0.5 mm. 3 100 50 250 24 Figure1: The dimensions of the pattern used in this study The patterns were then dipped for 60 seconds into slurry of Zircon (ZR-A) and colloidal silicate mixture with the viscosity controlled at27 secondsusing Zahn flow cup number 5.
The mould was prepared by placing the pattern in a flask as shown in Figure 2and unbounded silica sand with a grain fineness number of 60-100 was introduced manually into the flask.Compaction of the sand was made by vibrating the sand-filled flask for the duration of 60 secondsat a frequency of50 Hz.The flask was then placed in the pressure vessel as shown in (Figure2).

Table1 Freezing parameters of LingDong coal mine Parameters Main well Auxiliary well Wind well Thickness of alluvium（m） 21.5 21.5 21.5 Depth of frost（m） 463/55 383/55 312/55 diameter（m） φ6.5 φ7.5 φ6.0 Frozen circle diameter（m） φ12.8 φ13.4 φ11.5 Shaft wall thickness（m） 1.35 1.25 1.05 Number of freeze hole 16/16 17/17 14/14 Hole spacing（m） 1.25 1.23 1.28 Freezing period（d） 372 332 296 Average temperature（℃） Surface soil-5℃，Bedrock Section -12℃ Freezing monitoring content Freezing monitoring content includes: each layer’s temperature of thermometer hole, the temperature and flow rate of the recurring salt water and every excavation segment temperature of the frozen wall.
Table2 Partial measured values of the wellbore temperature of auxiliary shaft Number Freeing time/d Vertical depth/m Lithology East South West North 1 188 67.4 Fine sandstone -4.0 -4.7 -4.3 -5.0 2 190 71.1 Mudstone -3.8 -4.2 -4.2 -4.0 3 191 74.8 Moderate coarse sandstone -5.0 -5.3 -5.7 -6.7 4 192 78.5 Mudstone -4.1 -4.0 -4.2 -3.9 5 194 85.9 Coal seam 1.7 2.2 1.1 1.8 6 195 89.6 Mudstone -4.0 -4.1 -4.0 -3.0 7 270 331.8 Mudstone -5.8 -6.0 -6.3 -6.6 8 274 339.2 Coal seam -4.2 -3.9 -4.0 -3.7 9 288 376.2 Moderate coarse sandstone -6.1 -6.4 -6.0 -6.8 The Temperature of Salt Water.
(2) In the freezing engineering, the one that the temperature drops fastest is Quaternary gravel. coarse sandstone keeps the first place when in Cretaceous Stratum, followed by fine-grained sandstone, coal seam is the slowest.

Introduction Now the utilization of bauxite resource is lower, and the phenomenon of mineral resource wasting seriously, and a large number of low grade minerals are abandoned in china [1-2].
In the ingredient process，the grains of raw materials were made up of three different particle sizes.
The physico-chemical properties of mullite-SiC bricks Product name Ordinary mullite-SiC bricks New mullite-SiC bricks apparent porosity / % 16.8 15.9 bulk density /g·cm-3 2.72 2.57 compressive strength /MPa 67.5 102 refractoriness under load /°C 1575 1646 thermal shock resistance / cycles (1100°C, ater-cooling) ≥15 ≥8 Al2O3 % 71 62 SiC % 8.49 9.06 Table 6 The wear coefficient of different bricks bricks numbers surface inner Ordinary mullite-SiC bricks 1-1 4.42 9.38 1-2 4.62 8.76 New mullite-SiC bricks 2-1 3.63 6.98 2-2 3.79 6.69 Results and analysis Properties of new mullite-SiC bricks.

A greater number of fused silica is transformed from amorphous state to crystalline state with big volume expansion, at 1400℃, which causes microcrack leading to decrease the bending strength.
That reveals that nano-zirconia possessing large surface area and high surface energy effectively improve driving force of atomic motion, which is beneficial to hole among grain-boundaries shrinking and vacancy cluster submerging, and promote the effect of sintering composite ceramic.
Increasing sintering temperature can promote composite ceramic sintering, but a greater number of crystallization from amorphous state to crystalline state appears at 1400˚C and causes plenty of microcrack leading to strength of composite ceramic declining.

Manufacture of shell (i.e. cast) included in the wax coating paint group, sand and hardening process: First of all, with the configuration of a paint binder and refractory material, commonly used binder with water glass, silica sol or ethyl silicate, refractory material including a finer grained quartz, zircon corundum or powder etc..
Patent number: ZL201010212620.3 [4] Manufacturing method of Artificial jade.
Patent number: ZL 201010197098.6 [5] Zhang Zhaohui, Mo Tao.