Dr. Hu is interested in dynamical systems; state-dependent delay differential equations and their applications in engineering and biology; equivariant degree theory and applications; nonlinear analysis; and operations research.

Works in Treasures @ UT Dallas are made available exclusively for educational purposes such as research or instruction. Literary rights, including copyright for published works held by the creator(s) or their heirs, or other third parties may apply. All rights are reserved unless otherwise indicated by the copyright owner(s).

Recent Submissions

  • A Maximal Element Theorem in FWC-Spaces and its Applications 

    Lu, Haishu; Hu, Qingwen; Miao, Yulin (Hindawi Publishing Corporation, 2014-03-20)
    A maximal element theorem is proved in finite weakly convex spaces (FWC-spaces, in short) which have no linear, convex, and topological structure. Using the maximal element theorem, we develop new existence theorems of ...
  • Stabilization in a State-Dependent Model of Turning Processes 

    Hu, Qingwen; Krawcewicz, Wieslaw; Turi, Jànos (SIAM, 2012-01-03)
    We consider a two-degree-of-freedom model for turning processes which involves a system of differential equations with state-dependent delay. Depending on process parameters (e.g., spindle speed, depth of cut) the cutting ...
  • Estimates of Periods and Global Continua of Periodic Solutions for State-Dependent Delay Equations 

    Hu, Qingwen; Wu, J.; Zou, X. (2012-07-10)
    We study the global Hopf bifurcation of periodic solutions for one-parameter systems of state-dependent delay differential equations, and specifically we obtain a priori estimates of the periods in terms of certain values ...
  • Global Stability Lobes of Turning Processes with State-Dependent Delay 

    Hu, Qingwen.; Krawcewicz, Wieslaw; Turi, Jànos (SIAM, 2012-09-13)
    We obtain global stability lobes of two models of turning processes with inherit nonsmoothness due to the presence of state-dependent delays. In the process, we transform the models with state-dependent delays into systems ...