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Comparing the data in Figs.2(a) and 2(b), we find that the metal contact resistance with the carbon paper increased after polishing except for the A36 steel.
A reduction in the concentration of metal ions in solution can be obtained by a polypyrrole coating on the 316L stainless steel with and without a Au interlayer [10, 33].

Table 5 The analysis of variance for regression model Resources of variance f S V F value Pr>F significant X1 1 1.370 1.370 275.648 0.0001 ** X2 1 0.035 0.035 7.067 0.0450 * X3 1 0.097 0.097 19.483 0.0069 ** X12 1 1.481 1.481 298.093 0.0001 ** X1X2 1 0.068 0.068 13.606 0.0141 * X1X3 1 0.013 0.013 2.662 0.1637 X22 1 0.145 0.145 29.233 0.0029 ** X2X3 1 0.007 0.007 1.454 0.2818 X32 1 0.008 0.008 1.561 0.2668 model 9 3.154 0.350 70.543 0.0001 ** Residual error Lack of fit error Pure error 5 3 2 0.025 0.022 0.002 0.005 0.007 0.001 6.05 0.1452 Total 14 3.179 (Note: P<0.05, *; P<0.01, **) By dimension reduction analysis of experimental factor, the response curved surface and contour maps were showed in Fig. 4a, Fig. 4b, Fig. 4c.
[20] Box GEP, HUNTER W G: Statistics for Experiments: An Introduction to Design, Data Analysis and Model Building (John Wiley & Sons Inc, New York, 1987).

PAS, like many other sophisticated characterization techniques, requires specialists not only for the measurement itself, but also for analyzing raw experimental data.
Rods were machined with many different diameters such that approximately from 1%, up to 40% deformation (reduction in area) could be established.fig.5 describe the correlation coefficient between τ and Hv for 6066,6063 alloys after deformation.

The structural parameters are in good agreement with JCPDS (No.71-0677) data which indicates that the crystalline phase is the monoclinic crystalline structure, and the triplet peaks are indexed as (002), (020), (200).
The voltammograms in Fig. 4 show the evidence of oxidation reaction peaks, while the reduction reaction peaks can not be recognized clearly.

Due to a reduction of the barrier height the carrier takes shorter time to come into the saturation region.
By analyzing all forward schottky rectifying I-V data it is concluded that low carrier concentration n≤1×1015cm-3 the diode shows the rectifying I-V characteristics.

The flow stress data of materials that used in simulation must truly reflect the material constitutive behavior under high strain rate, high temperature and great strain.
This is because that the shear angle and tool cutting ability increase with the increase of tool rake angle, leading to reduction of cutting force.

Detailed data of the yield stress, ultimate tensile strength and elongation as a function of stain rate are shown in Fig. 3.
It is found that δi decreases generally with the reduction in strain rate, whereas the values of δu are approximately equal to each other at the three strain rates of 1.0×10-2, 1.0×10-3 and 1.0×10-4 s-1, except for an obvious decrease in δu at 1.0×10-5 s-1.

Methyl ester (ME) or known as biodiesel can be a viable alternative because of many benefits such as its renewability, reduction of greenhouse gas emissions and it offers similar performance and engine durability as petroleum diesel fuel.
RSM analyzed the experimental data obtained from above procedure by following second-order polynomial as shown by Eq. 1 [17]

By reducing the cement content in concrete through the incorporation of ZFA, it is proposed that a significant reduction in CO2 emissions can be achieved.
Cubes and cylinders are cast with these different replacement amounts of natural zeolite and tested at both seven and twenty-eight days to gather quantitative data and analyze the concrete's performance over time.

Experimental The synthesis of PAN was carried out in an aqueous medium in the presence of an oxidation-reduction system from ammonium peroxodisulfate ((NH4)2S2O8) and sodium dithionite (Na2S2O4) as initiators.
The rejection coefficient R (%) was calculated according to the data for the concentration of solutes in the feed c0 and the permeate cP: . (2) Results and Discussion PAN-membranes were prepared by the vapor induced phase separation technique with the variation of vapor exposure time from 0 (NIPS) to 60 minutes.