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: "energy harvesting cognitive radio with channel aware sensing strategy"
  Abstract: An energy harvesting cognitive radio scenario is considered where a secondary user (SU) with finite battery capacity opportunistically accesses the primary user (PU) channels. The objective is to maximize the throughput of SU under energy neutrality constraint and fading channel conditions in a single-user multi-channel setting. A channel selection criterion based on the probabilistic availability of energy with SU, channel conditions, and primary network's belief state is proposed, which chooses the best subset of channels for sensing, yielding higher throughput. We construct channel-aware optimal and myopic sensing strategies in a Partially Observable Markov Decision Process framework based on the proposed channel selection criterion. The effects of sensing errors and collisions between PU and SU on the throughput of the latter are studied. It is shown that there exists a trade-off between the transmission duration and the energy lost in collisions.

Connected through hyperedge HE-1 (induced by source paper "interference aided energy harvesting cognitive relaying with multiple primary transceivers"):
  with members:
    - "rf based energy harvesting in decode and forward relaying systems ergodic and outage capacities"
    - "wireless energy harvesting in a cognitive relay network"
    - "wireless powered relays in cooperative communications time switching relaying protocols and throughput analysis"
    - "optimal time sharing in underlay cognitive radio systems with rf energy harvesting"
    - "distributed power splitting for swipt in relay interference channels using game theory"
    - "wireless powered communications performance analysis and optimization"
    - "interference assisted wireless energy harvesting in cognitive relay network with multiple primary transceivers"
    - "outage analysis of spectrum sharing energy harvesting cognitive relays in nakagami m channels"

Connected through hyperedge HE-2 (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"
    - "wireless networks with rf energy harvesting a contemporary survey"
    - "on green energy powered cognitive radio networks"
    - "cognitive energy harvesting and transmission from a network perspective"
    - "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-3 (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"
    - "throughput maximization in wireless powered communication networks"
    - "cognitive energy harvesting and transmission from a network perspective"

Connected through hyperedge HE-4 (induced by source paper "cooperative access schemes for efficient swipt transmissions in cognitive radio networks"):
  with members:
    - "information and energy cooperation in cognitive radio networks"
    - "opportunistic wireless energy harvesting in cognitive radio networks"

Connected through hyperedge HE-5 (induced by source paper "interference assisted wireless energy harvesting in cognitive relay network with multiple primary transceivers"):
  with members:
    - "wireless powered relays in cooperative communications time switching relaying protocols and throughput analysis"
    - "distributed power splitting for swipt in relay interference channels using game theory"
    - "outage analysis of spectrum sharing energy harvesting cognitive relays in nakagami m channels"
    - "harvest then cooperate wireless powered cooperative communications"
    - "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"
    - "on spectrum sharing between energy harvesting cognitive radio users and primary users"

Connected through hyperedge HE-6 (induced by source paper "outage analysis of spectrum sharing energy harvesting cognitive relays in nakagami m channels"):
  with members:
    - "interference assisted wireless energy harvesting in cognitive relay network with multiple primary transceivers"
    - "wireless networks with rf energy harvesting a contemporary survey"
    - "the effects of limited channel knowledge on cognitive radio system capacity"
    - "opportunistic wireless energy harvesting in cognitive radio networks"
    - "relaying protocols for wireless energy harvesting and information processing"

Connected through hyperedge HE-7 (induced by source paper "rf powered cognitive radio networks technical challenges and limitations"):
  with members:
    - "information and energy cooperation in cognitive radio networks"
    - "dynamic spectrum access in cognitive radio networks with rf energy harvesting"
    - "opportunistic wireless energy harvesting in cognitive radio networks"
    - "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)