杨庆之，男，1985年7月本科毕业于南开大学数学系，1988年7月研究生毕业于河北师范大学，其后至1993年7月任教于河北师范大学，1997年5月在中国科学院应用数学所获博士学位，1999年5月获中国科学院博士后。1999年6月就职于南开大学数学科学学院。
简介
南开大学数学科学学院科学与工程计算系，教授，
博士生导师，系主任。
研究方向：最优化方法，数值多重线性代数。具体地，主要研究来自经济、金融、交通、通讯等工程实际部门的优化问题及其他相关问题的理论和算法。
基金及社会兼职
主持
国家自然科学基金一项，教育部留学回国人员启动基金一项；参加教育部重大项目一项。
《高校计算数学学报》编委，中国计算数学会常务理事，天津市计算数学会理事长，
中国运筹学会数学规划分会常务理事，天津工业与应用数学会理事，美国Math. Review评论员。
出版图书
访问经历
1993年9月— 1994年6月，北京大学数学系访问学者；
2005年9月— 2006年9月，美国Minnesota 大学访问学者。
主要科研论文
1. Yuning Yang and Qingzhi Yang, Some modified relaxed alternating projection methods for solving the two-sets convex feasibility problem, Optimization, published online, (Jan.,2012); (SCI)
2. Yuning Yang and Qingzhi Yang, On solving biquadratic optimization via semidefinite relaxation , Computational Optimization and Applications, 53(2012); (SCI)
3. Qingzhi Yang and Yuning Yang, Further results for Perron-Frobenius theorem for nonnegative tensors II, SIAM J. Matrix Anal. and Appl, 32(4)(2011)； (SCI)
4. Jinling Zhao and Qingzhi Yang, Self-adaptive projection methods for the multiple-sets split feasibility problem, Inverse Problems, 27(2011); (SCI)
5. Yuning Yang and Qingzhi Yang, Singular values of nonnegative rectangular tensors, Frontiers Math. China, 6(2011); (SCI)
6. Zhongwen Wang, Qingzhi Yang and Yuning Yang, The relaxed inexact projection methods for the split feasibility problem, Applied Math. and Computation, 217(2011); (SCI)
7.Yuning Yang and Qingzhi Yang, Further results for Perron-Frobenius theorem for nonnegative tensors, SIAM J. Matrix Anal. and Appl, 31(5)(2010)； （SCI）
8.Jinling Zhao, Qingzhi Yang and Hongxiu Gao, A note on Solodov and Tseng’s methods for maximal monotone mappings, Journal of Computational and Applied Mathematics, 234(5)(2010); (SCI)
9. Qinggang Wang, Jinling Zhao and Qingzhi Yang, Some non-interior path-following methods based on a scaled central path for linear complementarity problems, Computational Optimization and Applications, 46（2010）;(SCI)
10. Jinling Zhao and Qingzhi Yang, Weak co-coercivity and its applications in several algorithms for solving variational inequalities, Applied Mathematics and computation, 201(2008); (SCI)
11. Qingzhi Yang and Jinling Zhao，Some remarks on convex feasibility problem and best approximation problems， Numerical Mathematics: Theory, Method and Applications, 1(2008); (SCIE)
12. Jinling Zhao and Qingzhi Yang: A note on Krasnoselski-Mann theorem and its generalizations, Inverse Problems, 23（2007）;（SCI）
13. Qingzhi Yang: On the generalized system for relaxed cocoercive variational inequalities and projection methods, Journal of Optimization Theory and Applications, 130（2006）; (SCI)
14. Qingzhi Yang and Jinling Zhao: Generalized KM theorems and their applications, Inverse Problems, 22 (2006); (SCI)
15. 杨庆之，赵金玲：分裂可行问题的投影算法，计算数学，28（2006）;
16. Qingzhi Yang: On the variable-step relaxed projection algorithm for variational inequalities, Journal of Mathematical Analysis and Applications, 302 (2005); (SCI)
17. Qingzhi Yang: A new proof of strong duality theorem for semidefinite programming, Journal of Mathematical Analysis and Applications, 303 (2005); (SCI)
18. Jinling Zhao and Qingzhi Yang: Several solution methods for the splitting feasibility problem, Inverse Problems, 21 (2005); (SCI)
19. Qingzhi Yang: The revisit of a projection algorithm for variational inqualities, Journal of Industrial and Management Optimization, 1(2005); (SCI)
20. Qingzhi Yang: The relaxed CQ algorithm solving the splitting feasibility problem, Inverse Problems, 20 (2004); (SCI)
21. Qingzhi Yang and Hong Yu: Discretization method for semidefinite programming, Computers and Mathematics with Applications, 48 (20)