3 papers
cs.CV2026
Auditing Training-Free 3D Shape Retrieval with Diffused Geodesic Moments
Zhicheng Du, Changyue Liu, Wenji Xi +5
Reported retrieval scores for training-free shape descriptors conflate local signal design, normalization, aggregation, codebook fitting, and metric choices, making isolated compon…
math.CO2026
Prime Certificates for Exact Vertex-Coprime Ramsey Numbers
Zhicheng Du, Wenji Xi, Zhuo Deng +1
Let be the coprime graph on . We prove that the mixed vertex-coloring coprime Ramsey number satisfies \[ \Rcop(k_1,\ldots,k_c)=p_{\sum_{i=1}^c(k_i-1)}, \] whe…
cs.LG2025
SenseRay-3D: Generalizable and Physics-Informed Framework for End-to-End Indoor Propagation Modeling
Yu Zheng, Kezhi Wang, Wenji Xi +3
Modeling indoor radio propagation is crucial for wireless network planning and optimization. However, existing approaches often rely on labor-intensive manual modeling of geometry…