@article{Zhang2019, author = "Yuxi Zhang", title = "{CNN-based Symbol Recognition and Detection in Piping Drawings}", year = "2019", month = "8", url = "https://hammer.purdue.edu/articles/thesis/CNN-based_Symbol_Recognition_and_Detection_in_Piping_Drawings/8301080", doi = "10.25394/PGS.8301080.v1" }