Predicting the Compressive Strength of Desert Sand Concrete Using ANN: PSO and Its Application in Tunnel

Figure 8

Comparison of dust particles before and during shotcrete construction with two mix proportions. (a) PM1.0 concentration; (b) PM2.5 concentration; (c) PM10 concentration; (d) concentration difference of dust particles before and during shotcrete construction. Data are mean ± s.e.m. of the indicated number of independent experiments.  < 0.05,  < 0.01, and < 0.001. One-way ANOVA determined values with Tukey’s multiple comparison post hoc test.

(a)

(b)

(c)

(d)