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: "models for the modern power grid"
  Abstract: This article reviews different kinds of models for the electric power grid that can be used to understand the modern power system, the smart grid. From the physical network to abstract energy markets, we identify in the literature different aspects that co-determine the spatio-temporal multilayer dynamics of power system. We start our review by showing how the generation, transmission and distribution characteristics of the traditional power grids are already subject to complex behaviour appearing as a result of the the interplay between dynamics of the nodes and topology, namely synchronisation and cascade effects. When dealing with smart grids, the system complexity increases even more: on top of the physical network of power lines and controllable sources of electricity, the modernisation brings information networks, renewable intermittent generation, market liberalisation, prosumers, among other aspects. In this case, we forecast a dynamical co-evolution of the smart grid and other kind of networked systems that cannot be understood isolated. This review compiles recent results that model electric power grids as complex systems, going beyond pure technological aspects. From this perspective, we then indicate possible ways to incorporate the diverse co-evolving systems into the smart grid model using, for example, network theory and multi-agent simulation.

Connected through hyperedge HE-1 (induced by source paper "energy internet via packetized management enabling technologies and deployment challenges"):
  with members:
    - "event based electricity metering an autonomous method to determine transmission thresholds"
    - "finite blocklength communications in smart grids for dynamic spectrum access and locally licensed scenarios"
    - "sparse signal processing for grant free massive connectivity a future paradigm for random access protocols in the internet of things"
    - "why smart appliances may result in a stupid energy grid"
    - "increasing the throughput of an unlicensed wireless network through retransmissions"
    - "narrowband iot data transmission procedures for massive machine type communications"
    - "multi layer analysis of iot based systems"
    - "aggregation and resource scheduling in machine type communication networks a stochastic geometry approach"

Connected through hyperedge HE-2 (induced by source paper "finite blocklength communications in smart grids for dynamic spectrum access and locally licensed scenarios"):
  with members:
    - "ultra reliable cooperative short packet communications with wireless energy transfer"
    - "5g mobile cellular networks enabling distributed state estimation for smart grids"
    - "ultra reliable communication via optimum power allocation for type i arq in finite block length"
    - "convolutive superposition for multicarrier cognitive radio systems"
    - "maximizing the link throughput between smart meters and aggregators as secondary users under power and outage constraints"
    - "massive machine type communications in 5g physical and mac layer solutions"
    - "contention based geographic forwarding strategies for wireless sensors networks"
    - "next generation m2m cellular networks challenges and practical considerations"

Connected through hyperedge HE-3 (induced by source paper "event based electricity metering an autonomous method to determine transmission thresholds"):
  with members:
    - "maximizing the link throughput between smart meters and aggregators as secondary users under power and outage constraints"

Connected through hyperedge HE-4 (induced by source paper "why smart appliances may result in a stupid energy grid"):
  with members:
    - "dynamics of complex systems built as coupled physical communication and decision layers"
    - "agent based model for spot and balancing electricity markets"

Connected through hyperedge HE-5 (induced by source paper "implementing flexible demand real time price vs market integration"):
  with members:
    - "agent based model for spot and balancing electricity markets"
    - "volatility of power grids under real time pricing"

Connected through hyperedge HE-6 (induced by source paper "maximizing the link throughput between smart meters and aggregators as secondary users under power and outage constraints"):
  with members:
    - "enhanced transmit antenna selection scheme for secure throughput maximization without csi at the transmitter and its applications on smart grids"
    - "what can wireless cellular technologies do about the upcoming smart metering traffic"
    - "on the joint impact of beamwidth and orientation error on throughput in directional wireless poisson networks"
    - "machine learning in wireless sensor networks algorithms strategies and applications"
    - "throughput analysis of cognitive wireless networks with poisson distributed nodes based on location information"
    - "an overview of the transmission capacity of wireless networks"
    - "the effect of fading channel inversion and threshold scheduling on ad hoc networks"

Connected through hyperedge HE-7 (induced by source paper "analysis of demand control policies using an agent based multi layer power system model"):
  with members:
    - "why smart appliances may result in a stupid energy grid"
    - "dynamics of complex systems built as coupled physical communication and decision layers"
    - "agent based model for spot and balancing electricity markets"
    - "a game theoretic approach to energy trading in the smart grid"

Connected through hyperedge HE-8 (induced by source paper "decision error probability in a two stage communication network for smart grids with imperfect data links"):
  with members:
    - "average error probability in wireless sensor networks with imperfect sensing and communication for different decision rules"
    - "smart grid communications overview of research challenges solutions and standardization activities"
    - "for the grid and through the grid the role of power line communications in 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.SY(Systems and Control)