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: "two hop communication with energy harvesting"
  Abstract: Communication nodes with the ability to harvest energy from the environment have the potential to operate beyond the timeframe limited by the finite capacity of their batteries; and accordingly, to extend the overall network lifetime. However, the optimization of the communication system in the presence of energy harvesting devices requires a new paradigm in terms of power allocation since the energy becomes available over time. In this paper, we consider the problem of two-hop relaying in the presence of energy harvesting nodes. We identify the optimal offline transmission scheme for energy harvesting source and relay when the relay operates in the full-duplex mode. In the case of a half-duplex relay, we provide the optimal transmission scheme when the source has a single energy packet.

Connected through hyperedge HE-1 (induced by source paper "timely updates in energy harvesting two hop networks offline and online policies"):
  with members:
    - "using erasure feedback for online timely updating with an energy harvesting sensor"
    - "online timely status updates with erasures for energy harvesting sensors"
    - "optimal status updating for an energy harvesting sensor with a noisy channel"
    - "coded status updates in an energy harvesting erasure channel"
    - "status updates in a multi stream m g 1 1 preemptive queue"
    - "age minimal online policies for energy harvesting sensors with random battery recharges"
    - "sending information through status updates"
    - "age minimal transmission for energy harvesting sensors with finite batteries online policies"

Connected through hyperedge HE-2 (induced by source paper "age minimal online policies for energy harvesting sensors with random battery recharges"):
  with members:
    - "status updates in a multi stream m g 1 1 preemptive queue"
    - "sending information through status updates"
    - "scheduling status updates to minimize age of information with an energy harvesting sensor"
    - "status updates through multicast networks"
    - "energy harvesting networks with general utility functions near optimal online policies"
    - "timely updates over an erasure channel"
    - "age optimal information updates in multihop networks"
    - "age and value of information non linear age case"

Connected through hyperedge HE-3 (induced by source paper "coded status updates in an energy harvesting erasure channel"):
  with members:
    - "optimal status update for age of information minimization with an energy harvesting source"
    - "timely updates over an erasure channel"
    - "age optimal information updates in multihop networks"
    - "age and value of information non linear age case"
    - "age minimization in energy harvesting communications energy controlled delays"
    - "age minimal transmission in energy harvesting two hop networks"
    - "update or wait how to keep your data fresh"
    - "energy harvesting transmitters that heat up throughput maximization under temperature constraints"

Connected through hyperedge HE-4 (induced by source paper "mimo with energy recycling"):
  with members:
    - "energy harvesting wireless communications a review of recent advances"
    - "throughput maximization for the gaussian relay channel with energy harvesting constraints"
    - "wireless information transfer with opportunistic energy harvesting"
    - "transmission capacity of wireless ad hoc networks with energy harvesting nodes"
    - "transmission with energy harvesting nodes in fading wireless channels optimal policies"
    - "mimo broadcasting for simultaneous wireless information and power transfer"
    - "basic performance limits and tradeoffs in energy harvesting sensor nodes with finite data and energy storage"
    - "optimal packet scheduling in an energy harvesting communication system"

Connected through hyperedge HE-5 (induced by source paper "energy harvesting networks with general utility functions near optimal online policies"):
  with members:
    - "finite horizon energy efficient scheduling with energy harvesting transmitters over fading channels"
    - "online power control optimization for wireless transmission with energy harvesting and storage"
    - "optimal offline and competitive online strategies for transmitter receiver energy harvesting"
    - "optimal policies for wireless networks with energy harvesting transmitters and receivers effects of decoding costs"
    - "iterative dynamic water filling for fading multiple access channels with energy harvesting"
    - "energy harvesting networks with energy cooperation procrastinating policies"
    - "universally near optimal online power control for energy harvesting nodes"
    - "energy harvesting broadband communication systems with processing energy cost"

Connected through hyperedge HE-6 (induced by source paper "near optimal online distortion minimization for energy harvesting nodes"):
  with members:
    - "optimal offline and competitive online strategies for transmitter receiver energy harvesting"
    - "optimal policies for wireless networks with energy harvesting transmitters and receivers effects of decoding costs"
    - "iterative dynamic water filling for fading multiple access channels with energy harvesting"
    - "source channel coding under energy delay and buffer constraints"
    - "energy harvesting networks with energy cooperation procrastinating policies"
    - "universally near optimal online power control for energy harvesting nodes"
    - "energy harvesting broadband communication systems with processing energy cost"
    - "energy cooperation in energy harvesting communications"

Connected through hyperedge HE-7 (induced by source paper "energy harvesting communications under explicit and implicit temperature constraints"):
  with members:
    - "energy harvesting transmitters that heat up throughput maximization under temperature constraints"
    - "optimal policies for wireless networks with energy harvesting transmitters and receivers effects of decoding costs"
    - "iterative dynamic water filling for fading multiple access channels with energy harvesting"
    - "energy harvesting two hop communication networks"
    - "energy harvesting broadband communication systems with processing energy cost"
    - "throughput maximization for the gaussian relay channel with energy harvesting constraints"
    - "throughput optimal policies for energy harvesting wireless transmitters with non ideal circuit power"
    - "on channels with action dependent states"

Connected through hyperedge HE-8 (induced by source paper "age minimization in energy harvesting communications energy controlled delays"):
  with members:
    - "age optimal information updates in multihop networks"
    - "age and value of information non linear age case"
    - "age minimal transmission in energy harvesting two hop networks"
    - "update or wait how to keep your data fresh"
    - "on the age of information in status update systems with packet management"
    - "throughput maximization for the gaussian relay channel with energy harvesting constraints"
    - "broadcasting with an energy harvesting rechargeable transmitter"
    - "sum rate optimal power policies for energy harvesting transmitters in an interference channel"

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.IT(Information Theory)