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: "spatial throughput of mobile ad hoc networks powered by energy harvesting"
  Abstract: Designing mobiles to harvest ambient energy such as kinetic activities or electromagnetic radiation will enable wireless networks to be self-sustaining. In this paper, the spatial throughput of a mobile ad hoc network powered by energy harvesting is analyzed using a stochastic-geometry model. In this model, transmitters are distributed as a Poisson point process and energy arrives at each transmitter randomly with a uniform average rate called the energy arrival rate. Upon harvesting sufficient energy, each transmitter transmits with fixed power to an intended receiver under an outage-probability constraint for a target signal-to-interference-and-noise ratio. It is assumed that transmitters store energy in batteries with infinite capacity. By applying the random-walk theory, the probability that a transmitter transmits, called the transmission probability, is proved to be equal to the smaller of one and the ratio between the energy-arrival rate and transmission power. This result and tools from stochastic geometry are applied to maximize the network throughput for a given energy-arrival rate by optimizing transmission power. The maximum network throughput is shown to be proportional to the optimal transmission probability, which is equal to one if the transmitter density is below a derived function of the energy-arrival rate or otherwise is smaller than one and solves a given polynomial equation. Last, the limits of the maximum network throughput are obtained for the extreme cases of high energy-arrival rates and sparse/dense networks.

Connected through hyperedge HE-1 (induced by source paper "analysis of d2d communication with rf energy harvesting and interference management"):
  with members:
    - "d2d communications underlaying wireless powered communication networks"
    - "energy harvesting wireless communications a review of recent advances"
    - "d2d enhanced heterogeneous cellular networks with dynamic tdd"
    - "wireless networks with rf energy harvesting a contemporary survey"
    - "cognitive and energy harvesting based d2d communication in cellular networks stochastic geometry modeling and analysis"
    - "five disruptive technology directions for 5g"
    - "opportunistic wireless energy harvesting in cognitive radio networks"
    - "power control for d2d underlaid cellular networks modeling algorithms and analysis"

Connected through hyperedge HE-2 (induced by source paper "wireless powered asynchronous backscatter networks with sporadic short packets performance analysis and optimization"):
  with members:
    - "modeling and analysis of cellular networks using stochastic geometry a tutorial"
    - "backscatter communications for the internet of things a stochastic geometry approach"
    - "physical layer security in mimo backscatter wireless systems"
    - "full duplex backscatter interference networks based on time hopping spread spectrum"
    - "some new research trends in wirelessly powered communications"
    - "massive machine type communications in 5g physical and mac layer solutions"
    - "wirelessly powered backscatter communication networks modeling coverage and capacity"
    - "wireless powered communication opportunities and challenges"

Connected through hyperedge HE-3 (induced by source paper "a new interweave cognitive radio scheme for out band energy harvesting systems"):
  with members:
    - "distributed wireless power transfer with energy feedback"
    - "a tractable product channel model for line of sight scenarios"
    - "the kappa mu shadowed fading model with integer fading parameters"
    - "massive machine type communications in 5g physical and mac layer solutions"
    - "green cognitive relaying opportunistically switching between data transmission and energy harvesting"
    - "on the efficiency of far field wireless power transfer"
    - "on green energy powered cognitive radio networks"
    - "throughput maximization in wireless powered communication networks"

Connected through hyperedge HE-4 (induced by source paper "adaptively directional wireless power transfer for large scale sensor networks"):
  with members:
    - "green 5g heterogeneous networks through dynamic small cell operation"
    - "energy group buying with loading sharing for green cellular networks"
    - "wireless powered communication opportunities and challenges"
    - "spatial throughput maximization of wireless powered communication networks"
    - "user cooperation in wireless powered communication networks"
    - "energy beamforming with one bit feedback"
    - "wireless networks with rf energy harvesting a contemporary survey"
    - "multiuser miso beamforming for simultaneous wireless information and power transfer"

Connected through hyperedge HE-5 (induced by source paper "ambient rf energy harvesting in ultra dense small cell networks performance and trade offs"):
  with members:
    - "performance analysis of simultaneous wireless information and power transfer with ambient rf energy harvesting"
    - "performance analysis of ambient rf energy harvesting with repulsive point process modeling"
    - "downlink cellular network analysis with multi slope path loss models"
    - "wireless networks with rf energy harvesting a contemporary survey"
    - "coverage and rate analysis for millimeter wave cellular networks"
    - "evolution toward 5g multi tier cellular wireless networks an interference management perspective"
    - "opportunistic wireless energy harvesting in cognitive radio networks"
    - "fundamentals of heterogeneous cellular networks with energy harvesting"

Connected through hyperedge HE-6 (induced by source paper "multiuser energy diversity in energy harvesting wireless communications"):
  with members:
    - "distributed opportunistic scheduling for energy harvesting based wireless networks a two stage probing approach"
    - "energy harvesting wireless communications a review of recent advances"
    - "throughput maximization for the gaussian relay channel with energy harvesting constraints"
    - "fundamentals of heterogeneous cellular networks with energy harvesting"
    - "internet of things iot a vision architectural elements and future directions"
    - "multi user diversity with random number of users"
    - "optimal energy allocation for wireless communications with energy harvesting constraints"
    - "transmission with energy harvesting nodes in fading wireless channels optimal policies"

Connected through hyperedge HE-7 (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"
    - "energy cooperation in energy harvesting communications"
    - "interactive joint transfer of energy and information"
    - "opportunistic wireless energy harvesting in cognitive radio networks"
    - "throughput maximization for the gaussian relay channel with energy harvesting constraints"

Connected through hyperedge HE-8 (induced by source paper "a stochastic geometry analysis of large scale cooperative wireless networks powered by energy harvesting"):
  with members:
    - "millimeter wave energy harvesting"
    - "on the stability of random multiple access with stochastic energy harvesting"
    - "energy harvesting wireless communications a review of recent advances"
    - "a stochastic geometry framework for analyzing pairwise cooperative cellular networks"
    - "spectral efficiency of dynamic coordinated beamforming a stochastic geometry approach"
    - "stability analysis of slotted aloha with opportunistic rf energy harvesting"
    - "a tractable model for noncoherent joint transmission base station cooperation"
    - "simultaneous information and energy transfer in large scale networks with without relaying"

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)