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 scalable low cost uav traffic network unet"
  Abstract: This paper proposes a new unmanned-aerial-vehicle operation paradigm to enable a large number of relatively low-cost unmanned aerial vehicles to fly beyond line of sight, without costly sensing and communication systems or substantial human intervention in individual unmanned-aerial-vehicle control, in unmanned-aerial-vehicle-only traffic that is separated from non-unmanned-aerial-vehicle airspace. The main contribution of this work is to propose the use of pre-established route network for unmanned-aerial-vehicle traffic management, which allows 1) premapping of obstacles along the route network to reduce the onboard sensing requirements and the associated costs for avoiding such obstacles and 2) use of well-developed routing algorithms to select unmanned-aerial-vehicle schedules that avoid unmanned-aerial-vehicle/unmanned-aerial-vehicle conflicts. Available Global-Positioning-System-based navigation can be used to fly the unmanned aerial vehicle along the selected route and time schedule with relatively...

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.SY(Systems and Control)