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: "efficient energy management policies for networks with energy harvesting sensor nodes"
  Abstract: We study sensor networks with energy harvesting nodes. The generated energy at a node can be stored in a buffer. A sensor node periodically senses a random field and generates a packet. These packets are stored in a queue and transmitted using the energy available at that time at the node. For such networks we develop efficient energy management policies. First, for a single node, we obtain policies that are throughput optimal, i.e., the data queue stays stable for the largest possible data rate. Next we obtain energy management policies which minimize the mean delay in the queue. We also compare performance of several easily implementable suboptimal policies. A greedy policy is identified which, in low SNR regime, is throughput optimal and also minimizes mean delay. Next using the results for a single node, we develop efficient MAC policies.

Connected through hyperedge HE-1 (induced by source paper "kalman prediction based proportional fair resource allocation for a solar powered wireless downlink"):
  with members:
    - "optimal energy management policies for energy harvesting sensor nodes"
    - "a quantitative measure of fairness and discrimination for resource allocation in shared computer systems"

Connected through hyperedge HE-2 (induced by source paper "achievable secrecy rates of an energy harvesting device"):
  with members:
    - "energy harvesting wireless communications a review of recent advances"
    - "joint transmission and energy transfer policies for energy harvesting devices with finite batteries"
    - "energy harvesting for secure ofdma systems"
    - "robust beamforming for secure communication in systems with wireless information and power transfer"
    - "principles of physical layer security in multiuser wireless networks a survey"
    - "awgn channel under time varying amplitude constraints with causal information at the transmitter"
    - "optimum transmission policies for battery limited energy harvesting nodes"
    - "information theoretic analysis of an energy harvesting communication system"

Connected through hyperedge HE-3 (induced by source paper "optimal reliability in energy harvesting industrial wireless sensor networks"):
  with members:
    - "a learning theoretic approach to energy harvesting communication system optimization"
    - "transmission with energy harvesting nodes in fading wireless channels optimal policies"
    - "basic performance limits and tradeoffs in energy harvesting sensor nodes with finite data and energy storage"
    - "optimal energy management policies for energy harvesting sensor nodes"

Connected through hyperedge HE-4 (induced by source paper "energy harvesting wireless communications a review of recent advances"):
  with members:
    - "renewable powered cellular networks energy field modeling and network coverage"
    - "dynamic compression transmission for energy harvesting multihop networks with correlated sources"
    - "constrained codes for joint energy and information transfer"
    - "energy harvesting broadband communication systems with processing energy cost"
    - "spatial throughput of mobile ad hoc networks powered by energy harvesting"
    - "energy cooperation in energy harvesting communications"
    - "interactive joint transfer of energy and information"
    - "opportunistic wireless energy harvesting in cognitive radio networks"

Connected through hyperedge HE-5 (induced by source paper "optimal adaptive random multiaccess in energy harvesting wireless sensor networks"):
  with members:
    - "cross layer design of distributed sensing estimation with quality feedback part i optimal schemes"
    - "dynamic compression transmission for energy harvesting multihop networks with correlated sources"
    - "solarstat modeling photovoltaic sources through stochastic markov processes"
    - "asymptotically optimal power allocation for energy harvesting communication networks"
    - "medium access control protocols for wireless sensor networks with energy harvesting"
    - "transmission with energy harvesting nodes in fading wireless channels optimal policies"
    - "optimal energy management policies for energy harvesting sensor nodes"

Connected through hyperedge HE-6 (induced by source paper "joint transmission and energy transfer policies for energy harvesting devices with finite batteries"):
  with members:
    - "energy harvesting communication system with soc dependent energy storage losses"
    - "energy harvesting wireless communications a review of recent advances"
    - "beamforming for miso interference channels with qos and rf energy transfer"
    - "energy cooperation in energy harvesting communications"
    - "impact of mobile transmitter sources on radio frequency wireless energy harvesting"
    - "optimal energy management policies for energy harvesting sensor nodes"

Connected through hyperedge HE-7 (induced by source paper "on the stability of random multiple access with stochastic energy harvesting"):
  with members:
    - "medium access control protocols for wireless sensor networks with energy harvesting"
    - "neighbor discovery in a wireless sensor network multipacket reception capability and physical layer signal processing"
    - "optimal utilization of a cognitive shared channel with a rechargeable primary source node"
    - "information theoretic analysis of an energy harvesting communication system"
    - "asymptotic stability region of slotted aloha"

Connected through hyperedge HE-8 (induced by source paper "on online energy harvesting in multiple access communication systems"):
  with members:
    - "broadcasting with an energy harvesting rechargeable transmitter"
    - "sum rate optimal power policies for energy harvesting transmitters in an interference channel"
    - "a general framework for the optimization of energy harvesting communication systems with battery imperfections"
    - "transmission with energy harvesting nodes in fading wireless channels optimal policies"
    - "basic performance limits and tradeoffs in energy harvesting sensor nodes with finite data and energy storage"
    - "information theoretic analysis of an energy harvesting communication system"

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.NI(Networking and Internet Architecture)