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: "smart microgrids overview and outlook"
  Abstract: The idea of changing our energy system from a hierarchical design into a set of nearly independent microgrids becomes feasible with the availability of small renewable energy generators. The smart microgrid concept comes with several challenges in research and engineering targeting load balancing, pricing, consumer integration and home automation. In this paper we rst provide an overview on these challenges and present approaches that target the problems identied. While there exist promising algorithms for the particular eld, we see a missing integration which specically targets smart microgrids. Therefore, we propose an architecture that integrates the presented approaches and denes interfaces between the identied components such as generators, storage, smart and \dumb" devices.

Connected through hyperedge HE-1 (induced by source paper "homogeneous and mixed energy communities discovery with spatial temporal net energy"):
  with members:
    - "preserving both privacy and utility in network trace anonymization"
    - "privacy preserving and collusion resistant energy sharing"
    - "big data analytics for dynamic energy management in smart grids"
    - "community detection in networks with node attributes"
    - "a classification for community discovery methods in complex networks"

Connected through hyperedge HE-2 (induced by source paper "smart grid modeling and simulation comparing gridlab d and rapsim via two case studies"):
  with members:
    - "simulating the smart grid"

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.ET(Emerging Technologies)