In general, a positive trend in the change in the compressive strength of geopolymer concretes is observed when the content of the PCW additive is from 5% to 20% inclusive, and at 25–30%, the compressive strength begins to gradually decrease.
Meanwhile, the luminescence intensity and lifetime of Pr 3+ exhibit a decreasing trend with Cr 3+ doping in La 3 Ga 5 GeO 14 : Pr 3+ , Cr 3+ , demonstrating the existence of the energy transfer from Pr 3+ to Cr 3+ .
The results of mean Δb* between materials before toothbrushing (F = 167.7, p < 0.001) and after toothbrushing (F = 23.45, p < 0.001) were found highly significant.
The microstructure of the Zn-Li alloy can be visualized from the diagram, and the grain size showed a decreasing trend with increasing deformation.
Therefore, the elongation of the R3 alloy maintains an increasing trend.
As regards primary absorption, the coefficients vary widely, ranging between 0.05 and 0.97 × 10 −2 cm/min 0.5 , without exhibiting a clear trend related to the nature of the mortars.
A widely recognized phenomenon in the field is that the difference in wavenumber between the two vibration modes E 1 2g and A 1g of WS 2 exhibits a decreasing trend with the reduction in WS 2 thickness from bulk to few-layered structures [ 25 , 26 ].
Moreover, the p -value for the lack-of-fit test is close to the level of significance, and the F-value for the lack of fit is many times lower than for model factors, which indicates a small model error.
However, a clear trend of higher ultimate strength for thinner specimens was noticed, especially in the case of more brittle material due to its operational degradation.
Impact of Loading Rate As shown in Figure 5 a–d, with the increase of loading rate, B 1 (calculated using Formula (1)) and B 2 (calculated using Formula (2)) show a slightly increasing trend, and the values of B 1 and B 2 of coal and marble are larger than that of the other two rocks under load and displacement control modes.
The energy consumption in the course of the cutting process may be significant, even with the low value of the cutting force.
It can be found that the C element content of the material after the ignition experiment has a decreasing trend, and the O content has an increasing trend.
As seen in Table 6 , the p -value of the model is less than 0.0001 for the single parameter, indicating that the regression equation established between the model surface roughness and the respective variables is extremely significant, and the misfit F-value is 1.84, indicating that it is not significant.
As the diameter of the tapping hole increases, the time for the vortex to reach the tapping hole shows a decreasing trend.
In the early stage of freeze–thaw cycles, the difference in the damage variable of specimens with different persistency is large, which shows a decreasing trend from freeze–thaw cycles to 40 times, indicating that the increase in joint persistency in the late stage of freeze–thaw cycles has a gradually weakened influence on the total damage variable.
The null hypothesis of no correlation connecting the responses and variables was tested and found to be false because all the models were highly significant as their P-scores were very small (0.0001).
The strength still showed an increasing trend, and the thermal conductivity was not affected by the addition of fly–ash, and its numerical value was not very different.
Our choice is dictated by the observation that, in late Autumn, Winter, and early Spring, a definite trend towards increasing average temperatures was observed in the European Alps in the last 20 years [ 14 ].
Y is present in a small percentage in the alloy and its influence on the corrosion properties is almost insignificant [ 21 , 22 ].
With the increase in the crack propagation process, the greater the peak value of the von Mises stress at the crack tip, the greater the deformation at the crack position, which affects the magnetic field distribution of the pipeline weld during the crack propagation process, so the peak value of the detected magnetic induction intensity component shows an increasing trend. 3.2.
It can be seen from Figure 10 a that the slope of the straight-line segment of the stress–strain curve of the RCPB showed a decreasing trend when the rubber content was increased.
The data presented in the table reveal a decreasing trend in the frequency parameter of the cylindrical shell as the length is increased.
When the increase in these two factors exceeds the increase in total heat transfer, the ratio of total heat transfer to heat transfer surface area and residence time (heat flux) shows a decreasing trend.
It could be seen from Figure 4 that, with the increase in nano-CaCO 3 content, the absolute dry flexural strength of PBG showed a trend of first increasing then decreasing.
According to the results shown in Figure 5 , the radial distribution function (RDF) of hydrogen atoms during displacement cascade processes exhibits a decreasing trend.