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In a bench scale trial biological sulfate reduction was applied to convert anglesite (PbSO4) to galena (PbS).
Galena precipitates in the bioreactor due to the near-neutral pH at which sulfate reduction is carried out.
For the biological reduction of sulfur components hydrogen gas (H2) is a suitable electron donor.
Table 1 presents the elemental composition of the indirect leaching residue (data provided by Tecnicas Reunidas, Madrid, Spain).
Table 1 Elemental composition of the indirect leaching residue and the sludge after the bench scale experiment (data provided by Tecnicas Reunidas) Element % in indirect leaching residue % in sludge after bench scale experiment Pb 51.7 56.4 Zn 0.03 3.9 Fe 4.9 5 Cu 0.42 S-tot 21.8 18.2 SO4 19.9 0.52 The reactor was started up using a synthetic influent containing sulfate.

While PCA is a linear dimensionality reduction algorithm which means that it can only be used for linear distributed data.
But the PCA algorithm is a linear dimensionality reduction method, whose limit lies in that it can only reduce the dimension of the data with linear character.
PCA algorithm transforms original data into new coordinate system via orthogonal transform, and substitute the original high-dimensional data with several comprehensive data.
The comprehensive data is the principal component.
Fuzzy K-means algorithm divides data with fuzzy.

The issue of emission reduction has become one of the most important missions in China.
As one of the largest sources of energy consumption and pollution emission, the power generation industry plays an important role in the problem of emission reduction.
Example analysis Basic data.
However, since the regional emission reduction task is different, the corresponding regional emission reduction cost is different.
The emission reduction cost in region is much higher than those in other regions, while the emission reduction cost in region is much lower than those in other regions.

Iron reduction rate of Fe, Cu and Ni can be elevated to above 90% by smelting reduction, thus the comprehensive utilization of valuable metals can come true.
In this study, results of the “Double slag” smelting under the condition of smelting reduction have been analyzed from a thermodynamic point of view, and experimental verification of the possibility of “Double slag” smelting under the condition of smelting reduction also has been carried out. 1 Thermodynamic calculation According to the preliminary work the optimum conditions of the “Double slag” smelting reduction can be determined as follows: the slag basicity is 1.1, the adding ratio of JISCO slag is 10%.
Substituting the above data into Eq. 8, the content of manganese in liquid iron can be obtained as follows: . 3 Experimental study on smelting reduction In order to verify the results of thermodynamic calculations, smelting reduction experiment of the “Double slags” was carried out in the electric arc furnace with lining of L3.
Table 4 Tapping output and reduction rate of “Double slag” smelting Test number D1 D2 D3 Tapping amount/ kg 5.6 5.4 5.4 Reduction rate/ ％ 94.9 91.5 91.5 Table 5 Hot metal composition of “Double slag” smelting/ % Test result C Si Mn P S Ni Cu Co D1-T 3.84 0.17 0.21 0.022 0.034 0.85 0.420 0.001 It can be seen from Table 4 and Table 5, in the smelting conditions identified in this process, the iron reduction rate and hot metal chemical composition of double-slag smelting is relatively stable, the iron reduction rates were maintained above 91%, the reduction rate of Ni, Cu in hot metal is above the level of 95%.Compared with the calculational results in Section 2, the content of Si, Ni and S in the experimental results is close to the calculated results, while there are some differences between Mn content and the calculated results, which are mainly attributed to the following reasons, first, the test temperature in the bath is not equal to 1600℃, second, approximate calculation method
Conclusion (1) Test conditions are shown as follows: the weight of Jinchuan slag was 13.5kg, and the weight of JISCO slag was 1.5kg, the composition of the slag has the basicity of CaO : SiO2 = 1.1, the use level of reducing agent H4 was 1.8kg, smelting current strength was 1900A, smelting time was 20min, during the smelting reduction process, reduction rate of iron remained above 91%, the reduction rate of Ni, Cu in hot metal was above 95%; (2) Through thermodynamic calculation, it is found that the content of each element in molten iron of the calculation results is close to that of the experimetal results, thus the purpose of guiding experimental procedure has been achieved; (3) Low alloy iron produced by “Double slag” melting reduction can be smelted into high value-added spring steel.

Crest factor reduction (CFR) is a technology of reducing the signal PAPR at the expense of some performance parameters.
The fundamental of PC-CFR is detecting signal peaks in the data block range of the signal amplitude greater than the threshold, generating cancellation pulses canceled with peaks, so that the peaks do not exceed the threshold.
Detect signal peaks in the data block range of the signal amplitude greater than the threshold.
Nonlinear transform approach to the reduction of peak-to-average. 2010, The University of Texas at San Antonio: TEXAS
IFFT-based techniques for peak power reduction in OFDM communication systems. 2008, University of Victoria

Product Data Management (PDM) is the system which is not only storage place for the data; it is a tool which should make ECs faster and more effective.
The Product Data Management (PDM) is an engineering system which helps mainly the design engineers to handle the created data during the designing process and also during manufacturing.
Also the Product Data Management (PDM) is generally introduced by introducing it background and main properties.
The purpose is that all the data, which is created with different software, can be found from one place, from PDM.
With the help of the PDM the improvements in production, information access and data management may increase.

Reduction in area is a measure to determine formability on cold heading.
Reduction in area is affected by second phases and inclusions.
The test data of conventional ferrite+pearlite steel [6], tempered martensitic steel [6] and bainitic steel [7] are also plotted in Fig. 3 for the purpose of comparison.
This indicates that reduction in area determines the formability of screw heads.
[6] NIMS data base, Materials Information Technology Station, National Institute for Materials Science, Tsukuba, Japan

Table 3 present the statistical properties of creep rupture test data for 600�.
Table 4 is a similar presentation of creep rupture test data for 650�.
More work and large test data are required to clarify this issue.
One of the examples of Weibull plots for the result data is shown in Fig. 4.
For the statistical modeling of creep rupture data, more work is required.

This can be confirmed by surface area (SA) data as provided in Table 1.
These results are in good agreement with SA data: higher total surface area of materials based on CNTs can facilitate the contact between catalyst and oxygen, resulting a higher electrochemical activity towards ORR.
The oxygen reduction peak disappeared when methanol is present in the electrolyte solution.
Kinetics of oxygen reduction, J.
Rhee, Oxygen reduction on composite FeOx nanoparticles embedded in porous carbon, Electrochim.

The paper first introduces the principle of equivalent damping ratio of the seismic response calculation methods in seismic specification of China and Japan, then analyzes and compares reduction of seismic response caused by the equivalent damping ratio in seismic specification of China and Japan by calculating data.
Then forecast the reduction of seismic response.
The degree of reduction of acceleration response spectrum which is calculated based on the Japanese seismic specification reduces less than that the degree of reduction of acceleration response spectrum which is calculated based on the Chinese seismic specification.
With the damping ratio increasing, the degree of reduction of acceleration response spectrum which is calculated based on the Japanese seismic specification reduces more than that the degree of reduction of acceleration response spectrum which is calculated based on the Chinese seismic specification.
Fig. 4 The reduction rate of acceleration response spectrum in China and Japan is changed with the period in different damping ratio Fig. 4 shows that additional damping ratio in China and Japanese can reduce the degree of reduction of acceleration response spectrum.