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: "power allocation for conventional and buffer aided link adaptive relaying systems with energy harvesting nodes"
  Abstract: In this paper, we consider optimal power allocation for conventional and buffer-aided link adaptive energy harvesting (EH) relay systems, where an EH source communicates with the destination via an EH decode-and-forward relay {over fading channels}. In conventional relaying, source and relay transmit signals in consecutive time slots whereas in buffer-aided link adaptive relaying, the state of the source-relay and relay-destination channels {as well as the amounts of energy available at source and relay} determine whether the source or the relay is selected for transmission. Our objective is to maximize the system throughput over a finite number of transmission time slots for both relaying protocols. In case of conventional relaying, we propose an offline and several online joint source and relay transmit power allocation schemes. For offline power allocation, we formulate {a convex optimization problem} whereas for the online case, we propose a dynamic programming (DP) approach to compute the optimal online transmit power. To alleviate the complexity inherent to DP, we also propose several suboptimal online power allocation schemes. For buffer-aided link adaptive relaying, we show that the joint offline optimization of the source and relay transmit powers along with the link selection results in a mixed integer non-linear program which we solve optimally using the spatial branch-and-bound method. We also propose efficient online power allocation schemes for buffer-aided link adaptive relaying. Simulation results show that buffer-aided link adaptive relaying provides significant performance gains compared to conventional relaying but requires a higher complexity for computation of the power allocation solution. We also show that buffer-aided link adaptive relaying is more robust to changes in the EH rate than conventional relaying.

Connected through hyperedge HE-1 (induced by source paper "energy efficient resource allocation for time varying ofdma relay systems with hybrid energy supplies"):
  with members:
    - "cross layer scheduling for ofdma based cognitive radio systems with delay and security constraints"
    - "energy efficient resource allocation in ofdma systems with hybrid energy harvesting base station"
    - "maximizing energy efficiency in multi relay ofdma cellular networks"
    - "decentralized delay optimal control for interference networks with limited renewable energy storage"
    - "jointly optimal channel and power assignment for dual hop multi channel multi user relaying"
    - "a cross layer perspective on energy harvesting aided green communications over fading channels"
    - "adaptive power management for wireless base stations in a smart grid environment"
    - "wsr maximized resource allocation in multiple df relays aided ofdma downlink transmission"

Connected through hyperedge HE-2 (induced by source paper "distributed power control for delay optimization in energy harvesting cooperative relay networks"):
  with members:
    - "energy harvesting two hop communication networks"
    - "learning to cooperate via policy search"
    - "power allocation strategies in energy harvesting wireless cooperative networks"
    - "on green energy powered cognitive radio networks"
    - "throughput maximization for the gaussian relay channel with energy harvesting constraints"
    - "optimal scheduling and power allocation for two hop energy harvesting communication systems"
    - "a survey on delay aware resource control for wireless systems large deviation theory stochastic lyapunov drift and distributed stochastic learning"
    - "two hop communication with energy harvesting"

Connected through hyperedge HE-3 (induced by source paper "grid energy consumption and qos tradeoff in hybrid energy supply wireless networks"):
  with members:
    - "transmit power minimization for wireless networks with energy harvesting relays"
    - "energy harvesting wireless communications a review of recent advances"
    - "comp meets smart grid a new communication and energy cooperation paradigm"
    - "energy harvesting small cell networks feasibility deployment and operation"
    - "a lyapunov optimization approach for green cellular networks with hybrid energy supplies"
    - "cost minimization for fading channels with energy harvesting and conventional energy"
    - "multiuser joint energy bandwidth allocation with energy harvesting part i optimum algorithm multiple point to point channels"
    - "base station sleeping and resource allocation in renewable energy powered cellular networks"

Connected through hyperedge HE-4 (induced by source paper "capacity of the two hop relay channel with wireless energy transfer from relay to source and energy transmission cost"):
  with members:
    - "throughput analysis and optimization of wireless powered multiple antenna full duplex relay systems"
    - "a geometric analysis of the awgn channel with a sigma rho power constraint"
    - "wireless powered communication opportunities and challenges"
    - "rate maximization of decode and forward relaying systems with rf energy harvesting"
    - "optimal cooperative power allocation for energy harvesting enabled relay networks"
    - "wireless powered cooperative communications via a hybrid relay"
    - "multiple access fading channel with wireless power transfer and energy harvesting"
    - "power allocation strategies in energy harvesting wireless cooperative networks"

Connected through hyperedge HE-5 (induced by source paper "transmit power minimization for wireless networks with energy harvesting relays"):
  with members:
    - "energy harvesting wireless communications a review of recent advances"
    - "energy harvesting small cell networks feasibility deployment and operation"
    - "a lyapunov optimization approach for green cellular networks with hybrid energy supplies"
    - "throughput maximization for the gaussian relay channel with energy harvesting constraints"
    - "optimal scheduling and power allocation for two hop energy harvesting communication systems"
    - "training optimization for energy harvesting communication systems"
    - "optimal transmission policies for energy harvesting two hop networks"
    - "sum rate optimal power policies for energy harvesting transmitters in an interference channel"

Connected through hyperedge HE-6 (induced by source paper "energy allocation policy for cellular networks powered by renewable energy"):
  with members:
    - "energy harvesting wireless communications a review of recent advances"
    - "wireless information and power transfer energy efficiency optimization in ofdma systems"
    - "optimal scheduling and power allocation for two hop energy harvesting communication systems"
    - "optimal energy allocation for wireless communications with energy harvesting constraints"

Connected through hyperedge HE-7 (induced by source paper "energy harvesting networks with energy cooperation procrastinating policies"):
  with members:
    - "energy harvesting wireless communications a review of recent advances"
    - "wireless networks with rf energy harvesting a contemporary survey"
    - "energy efficient resource allocation in multiuser ofdm systems with wireless information and power transfer"
    - "energy efficient optimization for wireless information and power transfer in large scale mimo systems employing energy beamforming"
    - "energy cooperation in energy harvesting communications"
    - "interactive joint transfer of energy and information"
    - "throughput maximization for the gaussian relay channel with energy harvesting constraints"
    - "relay selection for simultaneous information transmission and wireless energy transfer a tradeoff perspective"

Connected through hyperedge HE-8 (induced by source paper "throughput maximization for two way relay channels with energy harvesting nodes the impact of relaying strategies"):
  with members:
    - "throughput maximization for the gaussian relay channel with energy harvesting constraints"
    - "a learning theoretic approach to energy harvesting communication system optimization"
    - "optimal scheduling and power allocation for two hop energy harvesting communication systems"
    - "optimal save then transmit protocol for energy harvesting wireless transmitters"
    - "optimal transmission policies for energy harvesting two hop networks"
    - "broadcasting with an energy harvesting rechargeable transmitter"
    - "sum rate optimal power policies for energy harvesting transmitters in an interference channel"
    - "two hop communication with energy harvesting"

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)