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: "cognitive energy harvesting and transmission from a network perspective"
  Abstract: Wireless networks can be self-sustaining by harvesting energy from radio-frequency (RF) signals. Building on classic cognitive radio networks, we propose a novel method for network coexisting where mobiles from a secondary network, called secondary transmitters (STs), either harvest energy from transmissions by nearby transmitters from a primary network, called primary transmitters (PTs), or transmit information if PTs are sufficiently far away; STs store harvested energy in rechargeable batteries with finite capacity and use all available energy for subsequent transmission when batteries are fully charged. In this model, each PT is centered at a guard zone and a harvesting zone that are disks with given radiuses; a ST harvests energy if it lies in some harvesting zone, transmits fixed-power signals if it is outside all guard zones or else idles. Based on this model, the spatial throughput of the secondary network is maximized using a stochastic-geometry model where PTs and STs are modeled as independent homogeneous Poisson point processes (HPPPs), under the outage constraints for coexisting networks and obtained in a simple closed-form. It is observed from the result that the maximum secondary throughput decreases linearly with the growing PT density, and the optimal ST density is inversely proportional to the derived transmission probability for STs.

Connected through hyperedge HE-1 (induced by source paper "on energy cooperation in energy harvesting underlay cognitive radio network"):
  with members:
    - "optimal time sharing in underlay cognitive radio systems with rf energy harvesting"
    - "on information and energy cooperation in energy harvesting cognitive radio"
    - "information and energy cooperation in cognitive radio networks"
    - "energy harvesting cognitive radio with channel aware sensing strategy"
    - "wireless networks with rf energy harvesting a contemporary survey"
    - "on green energy powered cognitive radio networks"
    - "optimal random access and random spectrum sensing for an energy harvesting cognitive radio"
    - "optimal utilization of a cognitive shared channel with a rechargeable primary source node"

Connected through hyperedge HE-2 (induced by source paper "on optimal offline time sharing policy for energy harvesting underlay cognitive radio"):
  with members:
    - "optimal time sharing in underlay cognitive radio systems with rf energy harvesting"
    - "on information and energy cooperation in energy harvesting cognitive radio"
    - "information and energy cooperation in cognitive radio networks"
    - "energy harvesting cognitive radio with channel aware sensing strategy"
    - "throughput maximization in wireless powered communication networks"

Connected through hyperedge HE-3 (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-4 (induced by source paper "wireless powered relays in cooperative communications time switching relaying protocols and throughput analysis"):
  with members:
    - "cutting last wires for mobile communication by microwave power transfer"
    - "wireless networks with rf energy harvesting a contemporary survey"
    - "full duplex wireless powered relay with self energy recycling"
    - "power allocation strategies in energy harvesting wireless cooperative networks"
    - "simultaneous information and energy transfer in large scale networks with without relaying"
    - "joint transmit beamforming and receive power splitting for miso swipt systems"
    - "wireless information and energy transfer in multi antenna interference channel"
    - "energy efficient resource allocation in multiuser ofdm systems with wireless information and power transfer"

Connected through hyperedge HE-5 (induced by source paper "green cognitive relaying opportunistically switching between data transmission and energy harvesting"):
  with members:
    - "a random access protocol for pilot allocation in crowded massive mimo systems"
    - "achieving autonomous compressive spectrum sensing for cognitive radios"
    - "wireless information and power transfer in relay systems with multiple antennas and interference"
    - "error rate analysis of cognitive radio transmissions with imperfect channel sensing"
    - "opportunistic wireless energy harvesting in cognitive radio networks"
    - "green power control in cognitive wireless networks"
    - "energy efficient delay constrained transmission and sensing for cognitive radio systems"
    - "performance analysis of mimo mrc in double correlated rayleigh environments"

Connected through hyperedge HE-6 (induced by source paper "wireless information and energy transfer in multi antenna interference channel"):
  with members:
    - "joint transmit beamforming and receive power splitting for miso swipt systems"
    - "coordinated beamforming for multiuser miso interference channel under rate outage constraints"
    - "throughput maximization for the gaussian relay channel with energy harvesting constraints"
    - "simultaneous information and energy transfer a two user miso interference channel case"
    - "throughput optimal policies for energy harvesting wireless transmitters with non ideal circuit power"
    - "distributed robust multicell coordinated beamforming with imperfect csi an admm approach"
    - "wireless information and power transfer architecture design and rate energy tradeoff"
    - "on the transfer of information and energy in multi user systems"

Connected through hyperedge HE-7 (induced by source paper "joint beamforming design and time allocation for wireless powered communication networks"):
  with members:
    - "collaborative wireless energy and information transfer in interference channel"
    - "user cooperation in wireless powered communication networks"
    - "information and energy cooperation in cognitive radio networks"
    - "wireless networks with rf energy harvesting a contemporary survey"
    - "power allocation strategies in energy harvesting wireless cooperative networks"
    - "wireless information and energy transfer in multi antenna interference channel"
    - "throughput maximization in wireless powered communication networks"
    - "coordinated beamforming for multiuser miso interference channel under rate outage constraints"

Connected through hyperedge HE-8 (induced by source paper "a low complexity algorithm for throughput maximization in wireless powered communication networks"):
  with members:
    - "joint beamforming design and time allocation for wireless powered communication networks"
    - "throughput maximization in wireless powered communication networks"
    - "framework for link level energy efficiency optimization with informed transmitter"
    - "mimo broadcasting for simultaneous wireless information and power transfer"

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)