The mixed model of improved exponential and power function and unequal interval gray GM(1,1)model have poor accuracy in predicting the maximum pull-out load of anchor bolts.An optimal combination model was derived usi...The mixed model of improved exponential and power function and unequal interval gray GM(1,1)model have poor accuracy in predicting the maximum pull-out load of anchor bolts.An optimal combination model was derived using the optimally weighted combination theory and the minimum sum of logarithmic squared errors as the objective function.Two typical anchor bolt pull-out engineering cases were selected to compare the performance of the proposed model with those of existing ones.Results showed that the optimal combination model was suitable not only for the slow P-s curve but also for the steep P-s curve.Its accuracy and stable reliability,as well as its prediction capability classification,were better than those of the other prediction models.Therefore,the optimal combination model is an effective processing method for predicting the maximum pull-out load of anchor bolts according to measured data.展开更多
盲道和盲道障碍物是影响盲人出行安全的重要因素,现有算法只对盲道分割和盲道障碍物检测单独处理,效率低且计算量大。针对上述问题,文中提出了一种基于深度学习的多任务识别算法。该算法通过骨干网络提取公共特征,将提取的特征经过SPP(S...盲道和盲道障碍物是影响盲人出行安全的重要因素,现有算法只对盲道分割和盲道障碍物检测单独处理,效率低且计算量大。针对上述问题,文中提出了一种基于深度学习的多任务识别算法。该算法通过骨干网络提取公共特征,将提取的特征经过SPP(Spatial Pyramid Pooling)和FPN(Feature Pyramid Networks)网络融合特征后,分别传入分割网络和检测网络完成盲道分割和盲道障碍物检测的任务。为了让盲道分割更平整,引入修正损失函数。为了提高障碍物检测召回率,将检测网络的NMS(Non Maximum Suppression)替换为Soft-NMS。实验结果表明,该算法分割部分MIoU(Mean Intersection over Union)、MPA(Mean Pixel Accuracy)分别达到了93.52%、95.29%,检测部分mAP(mean Average Precision)、mAP@0.5以及mAP@0.75分别达到了75.58%、91.58%和74.82%。相较于使用SegFormer网络进行盲道分割和RetinaNet网络进行盲道障碍物检测,该算法在精度提升的同时速度也提升73.72%,FPS(Frames Per Secon)达到了18.52。相比于其他对比算法,该算法在速度和精度上也有一定的提升。展开更多
基金The National Natural Science Foundation of China(No.51778485).
文摘The mixed model of improved exponential and power function and unequal interval gray GM(1,1)model have poor accuracy in predicting the maximum pull-out load of anchor bolts.An optimal combination model was derived using the optimally weighted combination theory and the minimum sum of logarithmic squared errors as the objective function.Two typical anchor bolt pull-out engineering cases were selected to compare the performance of the proposed model with those of existing ones.Results showed that the optimal combination model was suitable not only for the slow P-s curve but also for the steep P-s curve.Its accuracy and stable reliability,as well as its prediction capability classification,were better than those of the other prediction models.Therefore,the optimal combination model is an effective processing method for predicting the maximum pull-out load of anchor bolts according to measured data.
文摘盲道和盲道障碍物是影响盲人出行安全的重要因素,现有算法只对盲道分割和盲道障碍物检测单独处理,效率低且计算量大。针对上述问题,文中提出了一种基于深度学习的多任务识别算法。该算法通过骨干网络提取公共特征,将提取的特征经过SPP(Spatial Pyramid Pooling)和FPN(Feature Pyramid Networks)网络融合特征后,分别传入分割网络和检测网络完成盲道分割和盲道障碍物检测的任务。为了让盲道分割更平整,引入修正损失函数。为了提高障碍物检测召回率,将检测网络的NMS(Non Maximum Suppression)替换为Soft-NMS。实验结果表明,该算法分割部分MIoU(Mean Intersection over Union)、MPA(Mean Pixel Accuracy)分别达到了93.52%、95.29%,检测部分mAP(mean Average Precision)、mAP@0.5以及mAP@0.75分别达到了75.58%、91.58%和74.82%。相较于使用SegFormer网络进行盲道分割和RetinaNet网络进行盲道障碍物检测,该算法在精度提升的同时速度也提升73.72%,FPS(Frames Per Secon)达到了18.52。相比于其他对比算法,该算法在速度和精度上也有一定的提升。
