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: "a buffer aided successive opportunistic relay selection scheme with power adaptation and inter relay interference cancellation for cooperative diversity systems"
  Abstract: In this paper, we present a relay selection scheme which combines the spectral efficiency of successive opportunistic relaying with the robustness of single-link relay selection. More specifically, we propose a scheme that minimizes the total energy expenditure per time slot under an inter-relay interference cancellation scheme. The new relay selection policy is analyzed in terms of outage probability and diversity by modeling the evolution of relay buffers as a Markov Chain. We construct the state transition matrix of the Markov Chain and obtain its stationary distribution, which in turn, yields the outage probability. The proposed scheme outperforms relevant state-of-the-art relay selection schemes in terms of throughput, diversity, energy efficiency and average delay, as demonstrated via representative numerical examples.

Connected through hyperedge HE-1 (induced by source paper "relay pair selection in buffer aided successive opportunistic relaying using a multi antenna source"):
  with members:
    - "decoupled uplink and downlink in a wireless system with buffer aided relaying"
    - "virtual full duplex buffer aided relaying in the presence of inter relay interference"
    - "selective cooperative relaying over time varying channels"
    - "superposition coded concurrent decode and forward relaying"
    - "recovering multiplexing loss through successive relaying using repetition coding"
    - "a simple cooperative diversity method based on network path selection"
    - "towards the optimal amplify and forward cooperative diversity scheme"

Connected through hyperedge HE-2 (induced by source paper "wireless network level partial relay cooperation a stable throughput analysis"):
  with members:
    - "relay selection in cooperative power line communication a multi armed bandit approach"
    - "wireless energy harvesting in a cognitive relay network"
    - "energy aware wireless relay selection in load coupled ofdma cellular networks"
    - "probabilistic cooperation of a full duplex relay in random access networks"
    - "on the stability of random multiple access with stochastic energy harvesting"
    - "effect of energy harvesting on stable throughput in cooperative relay systems"
    - "relay assisted multiple access with full duplex multi packet reception"
    - "5g cellular key enabling technologies and research challenges"

Connected through hyperedge HE-3 (induced by source paper "relay pair selection with source precoding in buffer aided successive opportunistic relaying"):
  with members:
    - "decoupled uplink and downlink in a wireless system with buffer aided relaying"
    - "virtual full duplex buffer aided relaying in the presence of inter relay interference"
    - "selective cooperative relaying over time varying channels"
    - "superposition coded concurrent decode and forward relaying"
    - "recovering multiplexing loss through successive relaying using repetition coding"
    - "a simple cooperative diversity method based on network path selection"
    - "towards the optimal amplify and forward cooperative diversity scheme"

Connected through hyperedge HE-4 (induced by source paper "buffer aided relaying for the two hop full duplex relay channel with self interference"):
  with members:
    - "virtual full duplex buffer aided relaying in the presence of inter relay interference"
    - "all digital self interference cancellation technique for full duplex systems"
    - "on the capacity of the two hop half duplex relay channel"
    - "achievable rates for the fading half duplex single relay selection network using buffer aided relaying"
    - "effective capacity of buffer aided full duplex relay systems with selection relaying"
    - "capacity of the gaussian two hop full duplex relay channel with residual self interference"
    - "statistical delay tradeoffs in buffer aided two hop wireless communication systems"
    - "buffer aided relaying with adaptive link selection"

Connected through hyperedge HE-5 (induced by source paper "study of buffer aided distributed space time coding for cooperative wireless networks"):
  with members:
    - "adaptive reduced rank receive processing based on minimum symbol error rate criterion for large scale multiple antenna systems"
    - "direction finding algorithms based on joint iterative subspace optimization"
    - "buffer aided relaying with adaptive link selection"
    - "buffer aided relaying with adaptive link selection fixed and mixed rate transmission"
    - "adaptive distributed space time coding based on adjustable code matrices for cooperative mimo relaying systems"
    - "an efficient adaptive distributed space time coding scheme for cooperative relaying"
    - "a simple cooperative diversity method based on network path selection"
    - "optimal space time codes for the mimo amplify and forward cooperative channel"

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)