2021年全国大学生电子设计竞赛——信号失真度测量装置（A题）
: Sites like EEWorld and Elecfans provide "award-winning project collections" (获奖作品汇编) that often match your "12 zip" description. Key Problem Sets Included in 2021
: Developers often share their specific solutions (especially for popular tasks like Problem A: Signal Distortion Measurement) on platforms like GitHub or technical blogs like CSDN .