|
| 摘要: |
| 与单一预测方法相比,组合预测可以提高模型的拟合精度和预测能力.按照上述思路,将超声回弹综合法三参数幂函数测强曲线、五参数幂函数测强曲线及基于Shepard插值模型的测强曲线加权组合,按组合计算值与实测值的Theil不等系数极小化作为优化准则求得组合权重向量,构建了一类新的组合测强曲线.实例计算结果表明:组合测强曲线的各项拟合误差指标均优于单一测强曲线,这为改善超声回弹综合法检测精度提供了一种新的途径. |
| 关键词: 超声回弹综合法 抗压强度 Shepard插值模型 遗传算法 |
| DOI： |
| 分类号:TU755.7 |
| 基金项目:浙江省交通厅科技计划? |
|
| Integrated Concrete Strength Curve for Ultrasonic-Rebound Combined Method Based on Correlativity |
|
LI Yun-long ZHANG Yi-fei LUO Hai-liang CHENG Yi-jing ZHANG Hai-feng
|
| Abstract: |
| Integrated forecasting can provide higher accuracy than a single forecasting.Based on this,an integrated concrete strength curve was obtained for the ultrasonic-rebound combined method.This curve is the linear weighted aggregation of three curves provided by three models: three-parameter regression,five-parameter regression and Shepard interpolation model.The corresponding weight vector was obtained by the genetic algorithms(GA) to minimize the Theil coefficient.An example demonstrates that the fitting accu... |
| Key words: |
