human: Given a node-centered hypergraph: <hypergraph>, where nodes represent papers and hyperedges represent sets of papers co-cited by a source paper.

Details of the hypergraph:
Center node: "stepping stabilization using a combination of dcm tracking and step adjustment"
  Abstract: In this paper, a method for stabilizing biped robots stepping by a combination of Divergent Component of Motion (DCM) tracking and step adjustment is proposed. In this method, the DCM trajectory is generated, consistent with the predefined footprints. Furthermore, a swing foot trajectory modification strategy is proposed to adapt the landing point, using DCM measurement. In order to apply the generated trajectories to the full robot, a Hierarchical Inverse Dynamics (HID) is employed. The HID enables us to use different combinations of the DCM tracking and step adjustment for stabilizing different biped robots. Simulation experiments on two scenarios for two different simulated robots, one with active ankles and the other with passive ankles, are carried out. Simulation results demonstrate the effectiveness of the proposed method for robots with both active and passive ankles.

Connected through hyperedge HE-1 (induced by source paper "a robust biped locomotion based on linear quadratic gaussian controller and divergent component of motion"):
  with members:
    - "robust bipedal locomotion control based on model predictive control and divergent component of motion"

Connected through hyperedge HE-2 (induced by source paper "a robust closed loop biped locomotion planner based on time varying model predictive control"):
  with members:
    - "walking stabilization using step timing and location adjustment on the humanoid robot atlas"

Connected through hyperedge HE-3 (induced by source paper "a whole body model predictive control scheme including external contact forces and com height variations"):
  with members:
    - "walking stabilization using step timing and location adjustment on the humanoid robot atlas"
    - "a mpc walking framework with external contact forces"
    - "pattern generation for walking on slippery terrains"
    - "a robust walking controller based on online step location and duration optimization for bipedal locomotion"

Connected through hyperedge HE-4 (induced by source paper "a robust walking controller based on online step location and duration optimization for bipedal locomotion"):
  with members:
    - "walking stabilization using step timing and location adjustment on the humanoid robot atlas"
    - "online adaptation for humanoids walking on uncertain surfaces"
    - "dynamic walking over rough terrains by nonlinear predictive control of the floating base inverted pendulum"
    - "when to make a step tackling the timing problem in multi contact locomotion by topp mpc"
    - "momentum control with hierarchical inverse dynamics on a torque controlled humanoid"
    - "structured contact force optimization for kino dynamic motion generation"
    - "step timing adjustment a step toward generating robust gaits"
    - "a convex model of momentum dynamics for multi contact motion generation"

Connected through hyperedge HE-5 (induced by source paper "walking control based on step timing adaptation"):
  with members:
    - "whole body nonlinear model predictive control through contacts for quadrupeds"
    - "walking stabilization using step timing and location adjustment on the humanoid robot atlas"
    - "online adaptation for humanoids walking on uncertain surfaces"
    - "dynamic walking over rough terrains by nonlinear predictive control of the floating base inverted pendulum"
    - "when to make a step tackling the timing problem in multi contact locomotion by topp mpc"
    - "momentum control with hierarchical inverse dynamics on a torque controlled humanoid"
    - "structured contact force optimization for kino dynamic motion generation"
    - "step timing adjustment a step toward generating robust gaits"

Connected through hyperedge HE-6 (induced by source paper "a reactive and efficient walking pattern generator for robust bipedal locomotion"):
  with members:
    - "walking stabilization using step timing and location adjustment on the humanoid robot atlas"
    - "pattern generation for walking on slippery terrains"
    - "a robust walking controller based on online step location and duration optimization for bipedal locomotion"
    - "robust bipedal locomotion control based on model predictive control and divergent component of motion"
    - "push recovery of a humanoid robot based on model predictive control and capture point"
    - "step timing adjustment a step toward generating robust gaits"

Connected through hyperedge HE-7 (induced by source paper "rigid vs compliant contact an experimental study on biped walking"):
  with members:
    - "online adaptation for humanoids walking on uncertain surfaces"
    - "momentum control with hierarchical inverse dynamics on a torque controlled humanoid"
    - "structured contact force optimization for kino dynamic motion generation"
    - "step timing adjustment a step toward generating robust gaits"
    - "trajectory generation for multi contact momentum control"

Connected through hyperedge HE-8 (induced by source paper "robust bipedal locomotion control based on model predictive control and divergent component of motion"):
  with members:
    - "push recovery of a humanoid robot based on model predictive control and capture point"
    - "walking on partial footholds including line contacts with the humanoid robot atlas"
    - "step timing adjustment a step toward generating robust gaits"

Question: Please tell me which class the center node belongs to. The 40 classes are: cs.NA(Numerical Analysis), cs.MM(Multimedia), cs.LO(Logic in Computer Science), cs.CY(Computers and Society), cs.CR(Cryptography and Security), cs.DC(Distributed, Parallel, and Cluster Computing), cs.HC(Human-Computer Interaction), cs.CE(Computational Engineering, Finance, and Science), cs.NI(Networking and Internet Architecture), cs.CC(Computational Complexity), cs.AI(Artificial Intelligence), cs.MA(Multiagent Systems), cs.GL(General Literature), cs.NE(Neural and Evolutionary Computing), cs.SC(Symbolic Computation), cs.AR(Hardware Architecture), cs.CV(Computer Vision and Pattern Recognition), cs.GR(Graphics), cs.ET(Emerging Technologies), cs.SY(Systems and Control), cs.CG(Computational Geometry), cs.OH(Other Computer Science), cs.PL(Programming Languages), cs.SE(Software Engineering), cs.LG(Machine Learning), cs.SD(Sound), cs.SI(Social and Information Networks), cs.RO(Robotics), cs.IT(Information Theory), cs.PF(Performance), cs.CL(Computation and Language), cs.IR(Information Retrieval), cs.MS(Mathematical Software), cs.FL(Formal Languages and Automata Theory), cs.DS(Data Structures and Algorithms), cs.OS(Operating Systems), cs.GT(Computer Science and Game Theory), cs.DB(Databases), cs.DL(Digital Libraries), cs.DM(Discrete Mathematics). Directly output the class name.

gpt: cs.RO(Robotics)