针对传统的形态分割和模板匹配文字识别方法存在着识别精度低和不稳定的问题,为工业检测领域的芯片字符识别设计了一套基于深度学习的智能光学字符识别系统。该系统基于可微分二值化网络(detection with differentiable binarization ne...针对传统的形态分割和模板匹配文字识别方法存在着识别精度低和不稳定的问题,为工业检测领域的芯片字符识别设计了一套基于深度学习的智能光学字符识别系统。该系统基于可微分二值化网络(detection with differentiable binarization network,DBNet)、方向分类器和卷积网络,3个阶段分别训练深度模型实现文本区域的检测、文本方向分类和字符识别,最后进行串联推理完成微观芯片字符的自动化识别。同时针对显微场景下芯片字符图像易受光照干扰,采用数据增强与扩充、更换网络骨架、更改网络卷积步长,解决了复杂背景下微观芯片字符识别易误检的问题。工业生产线上的实际测试结果表明,该系统的识别准确率达到99.9%,误检率3.4?,速度0.56 s/张,极大地提升了字符识别正确率和效率,降低了误检率。最终的识别结果可以直接在云端远程实时查看,简化了传统工业字符识别流程,有助于工业智能化检测进一步发展和提高。展开更多
The strong electric and magnetic coupled novel HTSC (high temperature superconductor) open-loop microstrip resonators are studied in this report and the traditional structure of open-loop resonators is improved. A min...The strong electric and magnetic coupled novel HTSC (high temperature superconductor) open-loop microstrip resonators are studied in this report and the traditional structure of open-loop resonators is improved. A miniature wide-band HTSC bandpass filter is developed by the novel structure, which is fabricated on YBCO/LaAlO3/YBCO substrate with dimensions of 14.8×9.6 mm2. This filter is tested at 77 K, and the specifications are that the center frequency is 2230 MHz, the bandwidth is 455 MHz, and the best insertion loss is 0.14 dB in passband.展开更多
基金Supported by the High-Tech Research Project (863 Project) of the Ministry of Sci-ence and Technology of China (Grant No. 2002AA306421)the Youth Project of UESTC (Grant No. JX0649)
文摘The strong electric and magnetic coupled novel HTSC (high temperature superconductor) open-loop microstrip resonators are studied in this report and the traditional structure of open-loop resonators is improved. A miniature wide-band HTSC bandpass filter is developed by the novel structure, which is fabricated on YBCO/LaAlO3/YBCO substrate with dimensions of 14.8×9.6 mm2. This filter is tested at 77 K, and the specifications are that the center frequency is 2230 MHz, the bandwidth is 455 MHz, and the best insertion loss is 0.14 dB in passband.