针对无人机对光伏组件的故障(热斑和遮挡)诊断准确率较低和检测速度较慢的问题,提出了使用改进后的ELAN_MSE(Efficient Layer Aggregation Networks_Multipath Selective Enhancement)模块替换YOLOv7(You Only Look Once version 7)网络...针对无人机对光伏组件的故障(热斑和遮挡)诊断准确率较低和检测速度较慢的问题,提出了使用改进后的ELAN_MSE(Efficient Layer Aggregation Networks_Multipath Selective Enhancement)模块替换YOLOv7(You Only Look Once version 7)网络的ELAN模块,提高了有效特征学习的速率和准确率。首先,将YOLOv7的主干特征提取网络中的ELAN结构模块引入通道注意力机制SE(Squeeze-and-Excitation),提高特征提取的精确率;其次,增加了多路径卷积支路,实现中间层的跳跃结构连接,能够对目标特征图进行不同尺度的特征学习,提升故障缺陷识别的精度和检测速度。通过对数据增强后的光伏组件缺陷数据集进行实验验证,改进的YOLOv7算法与传统的YOLOv7和单发多框检测(Single Shot MultiBox Detector, SSD)算法对比,F1 Score分别提高了3.96%和5.98%,检测速度分别提高了1.43 ms和2.25 ms,为光伏组件故障检测提供了更有效的算法。展开更多
Much research has been done mainly in testcase generation and its effect for com-binatorial design approach for testing. This letter presents an algorithm for fault diagnosis basedon the approach. It can conclude that...Much research has been done mainly in testcase generation and its effect for com-binatorial design approach for testing. This letter presents an algorithm for fault diagnosis basedon the approach. It can conclude that the factors, which cause errors, must be in a very smallrange through analyzing the test cases after testing, and retesting with some complementary testcases. The algorithm can provide a very efficient and valuable guidance for the debugging andtesting of software.展开更多
基金Supported in part by the National Natural Science Foundation of China(60073012),Natural Science Foundation of Jiangsu Province.China(BK2001004),Opening Foundation of State Key Laboratory of Software Engineering In Wuhan University,Opening Foundation of J
文摘Much research has been done mainly in testcase generation and its effect for com-binatorial design approach for testing. This letter presents an algorithm for fault diagnosis basedon the approach. It can conclude that the factors, which cause errors, must be in a very smallrange through analyzing the test cases after testing, and retesting with some complementary testcases. The algorithm can provide a very efficient and valuable guidance for the debugging andtesting of software.