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: "a flow disturbance estimation and rejection strategy of multirotors with round trip trajectories"
  Abstract: This paper presents a round trip strategy of multirotors with unknown flow#N#disturbances. The method is designed to decrease flight time for return trips,#N#while the safety is ensured. The disturbance force and torque estimation model#N#is derived from the onboard inertial measurement unit (IMU) sensor data. The#N#estimation made during the previous time step is used as feedforward thrust and#N#torque during the inbound trip, and the disturbances are recorded for the#N#feedforward inputs of the return trip. As a demonstration of the capabilities#N#for this approach, static point and repetitive trajectory experiments are shown#N#along with a comparison against a conventional PD controller. The benefits of#N#this round trip strategy is further verified by multiple experiments. Faster#N#return trip velocity is obtained with small position errors. We also confirm#N#drastically reduced position errors along the flow direction.

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)