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The simulation starts from the first month, with the advent of the random number , also the consumption of the month is , corresponding reduction inventory is .
Table 2 Satisfaction in different quota number Quota number 1 every year 2 every year 3 every year 4 every year Satisfaction rate 54.00% 86.72% 97.48% 99.56% In the condition of MTBF is 4 months, assume that a unit have 4 years consumption data, assume that the average annual consumption is 2 when the upper limit of low consumption repairable parts. 4-year cumulative consumption is 8.

In the case of carbonation, chemical reaction between carbon dioxide from the air and the hydration products of cement in concrete causes a reduction in the alkalinity of concrete and consequently in its ability to protect the steel reinforcement from corrosion [3-6].
Fig.3 CT photo of the specimen Conclusions Observations and data presented in this paper support the following conclusions: Longer carbonate time leads to greater depth of carbonation, and fly ash may accelerate the carbonation of concrete materials.

The original variable group is , and the new set of independent variables after excluding redundant variables is which reduces dimensions. 3 Simulation Experiments and Results Analysis The non-linear data used in this experiment is collected from the actual production process of aluminum reduction cell.

Figure 2 Rockburst occurrence index relationship with mining depth changes (poland) 2.2 Structural characteristics of rock roof According to the coal comprehensive  histogram which is showed from drilling material,then calculate the roof thickness characteristic parameters of the area Lst=88.94>50,and each concrect data is in table 1.
characteristic parameters One Fine sandstone 30.05 1.0 30.05 Two Siltstone  11.08 1.0 11.08 Three Mudstone  4.78 0.62 2.96 Four Siltstone  16.24 1.0 16.24 Five Mudstone  24.32 0.62 15.08 Six Siltstone  13.53 1.0 13.53 Roof thickness characteristic parameters Lst=ΣhIrI 88.94 2.4 Geological structure Geological structure(fault, fold) is one of the important factors which will influence rockburst’s occurrence.Roadway groups are influenced by SF338, KF59 faults (whose fall are all more than 10m)and the wrinkle of the coal seam the two geological structures,with continuous excavation of roadway groups ,it is more and more close to the fault,and the stress focused on the fault is increasing constantly and continuously accumulating,when the coal is up to the limit strength,then it will break out the elastic energy by injection and so on,inducing fault rock burst[5]. 2.5 Effect of mining factors As the ongoing roadway mining in the mining area, forming roadway groups,resulting in the continuously reduction

The crystallization behavior of the glass in the ZrO2-ZnO-Al2O3-SiO2 system was also been investigated to provide useful data for further research.� Materials and Methods The glass was prepared from reagent grade SiO2, Al(OH)3, ZnO, ZrO2, K2CO3 and Sb2O3.
This causes the reduction of the value of Vickers microhardness of the glass ceramic.

Therefore, the reduction of the rock strength is avoided and the roadway is more difficult to destroy.
Fig. 2 The sketch of the grout diffusion Grout Effect According to the displacement data of the air inlet roadway by site monitoring over one month, the cumulative convergent curve of the roadway can be plotted (as shown in Fig. 3).

After stirring and drying fully and reduction twice we can get the tungsten powder doped with rare earth elements.
Table 1 Tungsten electrode composition ﹟the electronic work function data of WCe electrode is Ce2O3 because it is the main formula of Cerium oxide after high temperature treatment.

That is of significance and valuable to those subjects of investigation of strength of coal seam in deep underground and mechanism of propagation and coalescence and evolvement of crack for coal seam in deep underground, it is shown by numerical simulation that failure shape of coal seam in deep underground under triaxial compressive experiment of lateral pressure of 25Mpa is typically shear failure, and characteristic of deformation is obviously elastic-brittle, which is significance to understand the performance of the coal seam in deep underground Introduction I For many years, many scientists analyze data of global weather and founded that global climate has becoming warming and those changes are relevant with atmosphere greenhouse effect，If emission in atmosphere is not controlled effectively, global average temperature will continue becoming higher.
Captured in the atomospher is injected into coal seam, its immediate significance is reduction of greenhouse gases emission in the atomospher, there are also indirect significance, Fist injection into coal seam can enhanced coal bed methane recovery, injection into coal seam can not only reduce greenhouse gases emission and but also enhance coal bed methane recovery, which is very importent significance.

Analytical calibration functions of the single element calibration function R2 Cu(II) y =7.9125x + 6.5 0.9982 Pb(II) y =2.5250x + 6.0 0.9991 Cd(II) y = 3.1625x + 6.5 0.9993 Zn(II) y = 2.3544x – 7.2 0.9991 It can be concluded that ASV, applying the portable metal analyzer, together with the standard addition method is certainly a valid analytical method (good selectivity and, especially, sensitivity, data omitted) for determining the four metal elements having very similar half-wave potentials.
When Cu(II) was added, the formation of the Cu-Zn intermetallic compound caused reduction in the Zn(II) peak (first ~3%, second ~17%, third ~13%, respectively).

Introduction Energy saving and Emission reduction is an important research topic in the world, and the use of efficient thermal insulation material is one of the key measures.
While, destruction of humidity dynamic balance and surface evaporation of water vapor in the process of high humidity-reinforcement will import error to experimental data, which could only reflect the law but not exact values.