研究领域：数学物理、量子物理、核结构理论

感兴趣的研究方向：（1）量子系统的对称性，精确可解性等。（2）群和代数（李代数、李超代数、无限维李代数、变形李代数等）的表示论及其在物理学中的应用，如原子、分子结构和核结构的代数模型。（3）量子物理学的基本问题、量子信息。

从1998年以来，负责国家自然基金项目2项、中科院重离子加速器国家重点实验室研究课题2项、校内基金项目3项；参加国家973项目和清华科研985物理系重点项目各两项，并负责其中一个子课题。共发表论文34篇，其中被SCI收录的论文26篇，被EI收录的论文2篇。

获奖：2004年获北京市高等教育教学成果奖（一等奖，排名第二）

2003年获第七届北京青年优秀科技论文奖（二等奖，个人）

2002年获教育部霍英东教育基金会高等院校青年教师奖（三等奖，个人）

现任学术兼职：

教育部高等学校物理学专业教学指导分委员会 秘书长

全国群论教学研究会 副理事长

中科院兰州重离子加速器国家重点实验室客座研究人员

中国物理学会咨询委员会 秘书

主要论文： Dong Ruan et al., Nonlinear Dynamical Symmetries of Some Two-Dimensional Quantum Systems，

Commun. Theor. Phys. 42 (2004) 379–384.

Dong Ruan et al., General realization of N=4 supersymmetric quantum mechanics and its applications,

J. Math. Phys. 44 (7) (2003) 2787-2805.

Dong Ruan, Boson realizations of the polynomial angular momentum algebras with arbitrary powers

and their unitarization,

Phys. Lett. A 319 (1-2) (2003) 122-129.

Dong Ruan et al., Single Boson Realizations of the Higgs Algebra,

Commun. Theor. Phys. 40 (1) (2003) 73–76.

Dong Ruan et al., N=4 superconformal quantum mechanics in one dimension and its algebraic structure,

Commun. Theor. Phys. 38 (1) (2002) 11-14.

Dong Ruan et al., Indecomposable Representations of the Square-root Lie algebras of Vector Type and

Their Boson Realizations,

Commun. Theor. Phys. 35 (5) (2001) 513-518.

Dong Ruan et al., The Semiunitary Transformation and Isospectral Hamiltonians in Arbitrary

Dimensional Space,

Commun. Theor. Phys. 36 (1) (2001) 25-28.

Dong Ruan et al., Boson and differential realizations of polynomial angular momentum algebra,

J. Math. Phys. 42(6) (2001) 2718-2724.

Dong Ruan et al., The branching rules for U(7)->O(7)->G2->O(3),

Commun. Theor. Phys. 33(2) (2000) 221-226.

Dong Ruan et al., Indecomposable representations of the nonlinear Lie algebras,

J. Math. Phys. 41(11) (2000) 7839-7854.

Dong Ruan et al., Indecomposable representations of the nonlinear angular momentum algebra

of quadratic type,

Commun. Theor. Phys. 34 (4) (2000) 643-648.

Dong Ruan et al., On a Type of Nonlinear Lie Algebras,

Phys. Lett., A274 (1-2) (2000) 1-4.

Dong Ruan et al., Spinor representation reduction factors for O(N)->O(N-1),

Commun. Theor. Phys. 32 (1) (1999) 115-118.

Dong Ruan et al., Supersymmetric Quantum Mechanics in d-dimensional Space,

Commun. Theor. Phys., 32 (3) (1999) 477-480.

Dong Ruan et al., Boson Realization of Nonlinear SO(3) algebra,

Phys. Lett., A263 (1-2) (1999) 78-82.

Dong Ruan et al., Algebraic expressions for some SO(N) Racah coefficients for the two-rowed

irreducible representations,

Commun. Theor. Phys. 31 (2) (1999) 233-238.

Dong Ruan et al., Algebraic expressions for some SO(N) Racah coefficients,

J. Math. Phys. 39 (1998) 6225.

HongZhou Sun and Dong Ruan, The branching rules for SU(2N)->(SU(N)->O(N)->O(3))*SU(2)

and the highest weight states for groups SU(N) and O(N),

Commun. Theor. Phys. 29(4) (1998) 571-578.

HongZhou Sun and Dong Ruan, Algebraic expressions for O(N)->O(N-1) reduction factors for the three-rowed irreducible representations,

J. Math. Phys. 39 (1998) 630-648.

GuiLu Long, Dong Ruan et al., Splitting of one-phonon coupling states in the weakly coupling model,

Chinese. Phys. Lett. 15(1) (1998) 5-7.

HongZhou Sun, QiZhi Han, Mei Zhang, and Dong Ruan, Reduction factors for O(N)->O(N-1),

Commun. Theor. Phys. 30 (4) (1998) 541-550.