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 two hop communication networks"
  Abstract: Energy harvesting multi-hop networks allow for perpetual operation of low cost, limited range wireless devices. Compared with their battery operated counterparts, the coupling of energy and data causality constraints with half duplex relay operation makes it challenging to operate such networks. In this paper, a throughput maximization problem for energy harvesting two-hop networks with decode-and-forward half-duplex relays is investigated. For a system with two parallel relays, various combinations of the following four transmission modes are considered: Broadcast from the source, multi-access from the relays, and successive relaying phases I and II. Optimal transmission policies for one and two parallel relays are studied under the assumption of non-causal knowledge of energy arrivals and finite size relay data buffers. The problem is formulated using a convex optimization framework, which allows for efficient numerical solutions and helps identify important properties of optimal policies. Numerical results are presented to provide throughput comparisons and to investigate the impact of multiple relays, size of relay data buffers, transmission modes, and energy harvesting on the throughput.

Connected through hyperedge HE-1 (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-2 (induced by source paper "stochastic routing and scheduling policies for energy harvesting communication networks"):
  with members:
    - "reconstruction of correlated sources with energy harvesting constraints in delay constrained and delay tolerant communication scenarios"
    - "sensor selection and power allocation strategies for energy harvesting wireless sensor networks"
    - "energy harvesting wireless communications a review of recent advances"
    - "source channel coding under energy delay and buffer constraints"
    - "information and energy cooperation in cognitive radio networks"
    - "secrecy wireless information and power transfer with miso beamforming"
    - "multiuser miso beamforming for simultaneous wireless information and power transfer"
    - "simultaneous information and power transfer for broadband wireless systems"

Connected through hyperedge HE-3 (induced by source paper "performance of energy buffer aided incremental relaying in cooperative networks"):
  with members:
    - "incremental accumulate then forward relaying in wireless energy harvesting cooperative networks"
    - "wireless powered communication networks an overview"
    - "performance of adaptive link selection with buffer aided relays in underlay cognitive networks"
    - "a discrete time switching protocol for wireless powered communications with energy accumulation"
    - "on off transmission policy for wireless powered communication with energy storage"
    - "performance analysis of wireless powered communication with finite infinite energy storage"
    - "relaying protocols for wireless energy harvesting and information processing"
    - "buffer aided relaying with adaptive link selection fixed and mixed rate transmission"

Connected through hyperedge HE-4 (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 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"
    - "broadcasting with an energy harvesting rechargeable transmitter"

Connected through hyperedge HE-5 (induced by source paper "multi agent reinforcement learning for energy harvesting two hop communications with a partially observable state"):
  with members:
    - "multi access communications with energy harvesting a multi armed bandit model and the optimality of the myopic policy"
    - "iterative dynamic water filling for fading multiple access channels with energy harvesting"
    - "a learning theoretic approach to energy harvesting communication system optimization"
    - "optimal scheduling and power allocation for two hop energy harvesting communication systems"
    - "throughput optimal policies for energy harvesting wireless transmitters with non ideal circuit power"
    - "throughput maximization for an energy harvesting communication system with processing cost"
    - "optimal save then transmit protocol for energy harvesting wireless transmitters"
    - "optimal transmission policies for energy harvesting two hop networks"

Connected through hyperedge HE-6 (induced by source paper "distributed power control for delay optimization in energy harvesting cooperative relay networks"):
  with members:
    - "learning to cooperate via policy search"
    - "power allocation strategies in energy harvesting wireless cooperative networks"
    - "power allocation for conventional and buffer aided link adaptive relaying systems with energy harvesting nodes"
    - "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-7 (induced by source paper "multi agent reinforcement learning for energy harvesting two hop communications with full cooperation"):
  with members:
    - "multi access communications with energy harvesting a multi armed bandit model and the optimality of the myopic policy"
    - "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"
    - "two hop communication with energy harvesting"
    - "transmission with energy harvesting nodes in fading wireless channels optimal policies"
    - "optimum transmission policies for battery limited energy harvesting nodes"
    - "the multi way relay channel"

Connected through hyperedge HE-8 (induced by source paper "throughput maximization for wireless powered communications harvesting from non dedicated sources"):
  with members:
    - "some new research trends in wirelessly powered communications"
    - "spatial throughput maximization of wireless powered communication networks"
    - "outage probability of energy harvesting relay aided cooperative networks over rayleigh fading channel"
    - "throughput maximization in wireless powered communication networks"
    - "a general framework for the optimization of energy harvesting communication systems with battery imperfections"

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)