报告人: 孙钰博 副教授
报告题目: Single-Fragment Forensic Coding via Multidimensional Cyclically Permutable Codes
时间: 2026年11月5日(周四)15:00—16:00
地点: 西安交通大学数学与统计学院423会议室
邀请人: 魏恒嘉 教授
报告摘要:
3D printing raises forensic challenges such as untraceable fabrication. We study single-fragment forensic coding, recovering an embedded identifier from any sufficiently thick axis-parallel box fragment under substitution errors. We introduce multidimensional cyclically permutable codes and use periodic lifting to reduce alignment to cyclic synchronization.
We construct substitution-correcting multidimensional cyclically permutable codes with nearly optimal redundancy. In the thick-fragment regime h=cM^{1/d}, periodic lifting yields (M,h) single-fragment forensic codes with rate c^d-o(1), approaching one as c=1-o(1).
报告人简介:
孙钰博,西安电子科技大学数学与交叉科学研究院华山菁英副教授,博士毕业于首都师范大学,师从葛根年教授。
主要研究编码理论,涵盖插入/删除信道下的纠错码、撕纸信道下的纠错码、序列重构问题与约束编码等方向。已在 IEEE Transactions on Information Theory 发表论文17篇,并主持博新计划项目1项。