游煦 博士 大发dafa888手机经典版副教授

北京航空航天大学应用数学方向博士，主要研究领域为函数逼近论、统计学习理论等。曾负责和参与国家自然基金项目、北京市教委科技一般项目等项。在国内外期刊上发表论文40余篇，其中SCI/EI检索近30篇。担任美国数学评论评论员以及多个国际期刊的评审人。

u  个人简历

1998.09 - 2002.07 湖北民族大学，数学与应用数学，理学学士

2002.09 - 2005.04 北京航空航天大学，应用数学，理学硕士

2013.09 - 2016.09 北京航空航天大学，应用数学，理学博士

2005.04 - 大发dafa888手机经典版，讲师，副教授

u  主讲课程

高等数学、线性代数、概率论、运筹与优化等

u  研究方向

函数逼近论

统计学习理论

u  主要参与科研项目

2018-2020 北京市教委科技一般项目，项目负责人

2015-2016 北京市教委项目，主要完成人

2013-2015 北京市教委项目，主要完成人

2015-2017 国家自然科学基金青年基金，主要完成人

2011-2013 国家自然科学基金

u  发表论文

1. Di-Rong Chen, Xu You. Minimax optimal rates of convergence for multicategory classifications. ACTA Mathematica Sinica-English Series, 2007, 23(8), 1419–1426.

2. Xiaodong Cao, Xu You. Multiple-correction and continued fraction approximation(II). Applied Mathematics and Computation, 2015, 261, 192-205.

3. Xiaodong Cao, Hongmin Xu, Xu You. Multiple-correction and Faster Approximation. Journal of Number Theory, 2015, 149, 327-350.

4. Xu You. Some new quicker convergences to Glaisher–Kinkelin’s and Bendersky–Adamchik’s constants. Applied Mathematics and Computation, 2015, 271, 123-130.

5. Xu You, Di-Rong Chen. Improved continued fraction sequence convergent to the Somos' quadratic recurrence constant. Journal of Mathematical Analysis and Applications, 2016,436 (1), 513-520.

6. Xu You, A note on Ramanujan's factorial approximation. International Journal of Number Theory, 2016,12 (5), 1187–1194.

7. Xu You, Di-Rong Chen, Hong Shi. Continued fraction inequalities related to (1+1/x)^x. Journal of Mathematical Analysis and Applications, 2016,443 (2), 1090-1094.

8. Xu You, Shouyou Huang, Liu Lu. Some inequalities associated to the ratio of Pochhammer $k$-symbol. Mathematical Inequalities & Applications, 2017, 20 (1), 105–110.

9. Xu You. Approximation of the median of the gamma distribution. Journal of Number Theory, 2017,174, 487–493.

10. Xu You. Continued fraction approximation for the Gamma function by the Tri-gamma function. Results in Mathematics, 2017,72 (4), 2121–2127.

11. Xu You, Di-Rong Chen. Sharp approximation formulas and inequalities for the Wallis ratio by continued fraction. Journal of Mathematical Analysis and Applications, 2017,455 (2), 1743-1748.

12. Xu You, Min Han. Continued fraction approximation for the Gamma function based on the Tri-gamma function. Journal of Mathematical Analysis and Applications, 2018,457 (1), 389-395.

13. Xu You. Some sequences converging towards the Ioachimescu's constant related to Ramanujan formula. The Ramanujan Journal, 2018,45 (2), 391–397.

14. Xu You, Di-Rong Chen. Improved approximation formulas and inequalities for the Wallis ratio. Bulletin of the Iranian Mathematical Society, 2019,45(3), 783–789.

15. Xu You. Improved asymptotic formula and inequalities for the ratio of Pochhammer $k$-symbol. Revista de la Real Academia de Ciencias Exactas, Físicas y Naturales. Serie A. Matemáticas, 2020,114 (3).

16. Xiaocui Li, Xu You. Mixed finite element methods for fractional Navier-Stokes equations. Journal of Computational Mathematics, 2021,39(1), 130–146.

17. Min Han, Hongliang Zhang, Xu You*, Zhaoxu Sun. Approximations for the Ratio of Gamma Functions via Digamma function and Its Applications. Bulletin of the Brazilian Mathematical Society, New Series, 2021,52, 415–427.