Xunnian Yang

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About

Xunnian Yang is a leading figure in computer-aided geometric design and manufacturing, whose work has significantly advanced the precision and efficiency of freeform curve and surface processing. His research focuses on geometric modeling, CNC machining, and the development of robust algorithms for shape interpolation and approximation. Yang’s most influential contribution is the 2002 paper “Efficient circular arc interpolation based on active tolerance control,” which has garnered over 90 citations and introduced a novel method for generating high-quality circular arc approximations with real-time error control—a critical innovation for high-speed, high-accuracy machining. This work directly addressed the challenge of balancing computational speed with geometric fidelity, enabling smoother tool paths and reducing machining time. Beyond this, Yang has made substantial contributions to surface reconstruction, offset curve generation, and the design of error-bounded algorithms for industrial applications. His research is widely cited in both academic and engineering contexts, reflecting its practical impact on CAD/CAM systems. Yang’s ability to merge theoretical rigor with real-world manufacturing constraints marks him as a key innovator in the field, whose work continues to influence modern digital fabrication and geometric computing.