Research Article
Improved Hybrid Model for Predicting Concrete Crack Openings Based on Chaos Theory
Table 1
Regression coefficients of model II for concrete crack openings.
| | Regression coefficient | Equation (22) |
| | a11 | −1.661 × 10−1 | | a21 | 9.235 × 10−2 | | a31 | 1.701 × 10−2 | | a41 | 0 | | a51 | 0 | | a61 | 7.707 × 10−2 | | a71 | 2.446 × 10−2 | | a81 | 9.186 × 10−2 | | a91 | −1.097 × 10−1 | | a12 | 2.297 × 10−3 | | a22 | −1.320 × 10−3 | | a32 | 0 | | a42 | 0 | | a52 | 1.158 × 10−3 | | a62 | −2.587 × 10−3 | | a72 | 0 | | a82 | −3.704 × 10−3 | | a92 | 2.673 × 10−3 | | a13 | 0 | | a23 | 0 | | a33 | 0 | | a43 | −8.494 × 10−6 | | a53 | -1.737 × 10−5 | | a63 | 1.863 × 10−5 | | a73 | 0 | | a83 | 4.518 × 10−5 | | a93 | −2.476 × 10−5 | | b1 | -6.393 × 10−2 | | b2 | −2.685 | | b3 | 0 | | b4 | 2.094 × 10−1 | | c1 | 2.537 × 10−1 | | c2 | 7.648 × 10−2 | | a0 | 2.931 × 10−1 |
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