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: "wireless information and power transfer in two way amplify and forward relaying channels"
  Abstract: The various wireless networks have made the ambient radio frequency signals around the world. Wireless information and power transfer enables the devices to recycle energy from these ambient radio frequency signals and process information simultaneously. In this paper, we develop a wireless information and power transfer protocol in two-way amplify-and-forward relaying channels, where two sources exchange information via an energy harvesting relay node. The relay node collects energy from the received signals and uses it to provide the transmission power to forward the received signals. We analytically derive the exact expressions of the outage probability, the ergodic capacity and the finite-SNR diversity-multiplexing trade-off (DMT). Furthermore, the tight closed-form upper and lower bounds of the outage probability and the ergodic capacity are then developed. Moreover, the impact of the power splitting ratio is also evaluated and analyzed. Finally, we show that compared to the non-cooperative relaying scheme, the proposed protocol is a green solution to offer higher transmission rate and more reliable communication without consuming additional resource.

Connected through hyperedge HE-1 (induced by source paper "ultra reliable short message relaying with wireless power transfer"):
  with members:
    - "finite blocklength performance of multi terminal wireless industrial networks"
    - "analysis of wireless communications with finite blocklength and imperfect channel knowledge"
    - "on wirelessly powered communications with short packets"
    - "wireless networks with rf energy harvesting a contemporary survey"
    - "power allocation strategies in energy harvesting wireless cooperative networks"
    - "ultra reliable communication in 5g wireless systems"
    - "simultaneous information and power transfer for broadband wireless systems"
    - "relaying protocols for wireless energy harvesting and information processing"

Connected through hyperedge HE-2 (induced by source paper "on secure communication using rf energy harvesting two way untrusted relay"):
  with members:
    - "interference aided energy harvesting cognitive relaying with multiple primary transceivers"
    - "secure communication via a wireless energy harvesting untrusted relay"
    - "joint power splitting and secure beamforming design in the wireless powered untrusted relay networks"
    - "secure communication via an untrusted non regenerative relay in fading channels"
    - "relaying protocols for wireless energy harvesting and information processing"
    - "wireless information and power transfer architecture design and rate energy tradeoff"
    - "robust beamforming for wireless information and power transmission"
    - "construction of wiretap codes from ordinary channel codes"

Connected through hyperedge HE-3 (induced by source paper "interference alignment with power splitting relays in multi user multi relay networks"):
  with members:
    - "dynamic power splitting policies for af relay networks with wireless energy harvesting"
    - "simultaneous information and energy transfer in large scale networks with without relaying"
    - "wireless information and power transfer energy efficiency optimization in ofdma systems"
    - "relaying protocols for wireless energy harvesting and information processing"
    - "wireless information and power transfer a dynamic power splitting approach"
    - "mimo broadcasting for simultaneous wireless information and power transfer"
    - "approaching the capacity of wireless networks through distributed interference alignment"

Connected through hyperedge HE-4 (induced by source paper "outage analysis in two way communication with rf energy harvesting relay and co channel interference"):
  with members:
    - "rf based energy harvesting in decode and forward relaying systems ergodic and outage capacities"
    - "wireless powered communication networks an overview"
    - "simultaneous wireless information and power transfer with co channel interference"
    - "simultaneous wireless information and power transfer in modern communication systems"
    - "relaying protocols for wireless energy harvesting and information processing"
    - "radio frequency energy harvesting and management for wireless sensor networks"
    - "wireless information and power transfer architecture design and rate energy tradeoff"

Connected through hyperedge HE-5 (induced by source paper "distributed multi relay selection in accumulate then forward energy harvesting relay networks"):
  with members:
    - "wireless powered communication opportunities and challenges"
    - "wireless powered relays in cooperative communications time switching relaying protocols and throughput analysis"
    - "relay selection in wireless powered cooperative networks with energy storage"
    - "distributed power splitting for swipt in relay interference channels using game theory"
    - "full duplex mimo relaying powered by wireless energy transfer"
    - "wireless powered communications performance analysis and optimization"
    - "joint power splitting and antenna selection in energy harvesting relay channels"
    - "wireless information and energy transfer for two hop non regenerative mimo ofdm relay networks"

Connected through hyperedge HE-6 (induced by source paper "wireless powered two way relaying with power splitting based energy accumulation"):
  with members:
    - "relay selection in wireless powered cooperative networks with energy storage"
    - "distributed power splitting for swipt in relay interference channels using game theory"
    - "wireless powered communications performance analysis and optimization"
    - "a discrete time switching protocol for wireless powered communications with energy accumulation"
    - "time switching based swipt for network coded two way relay transmission with data rate fairness"
    - "relaying protocols for wireless energy harvesting and information processing"

Connected through hyperedge HE-7 (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-8 (induced by source paper "distributed power splitting for swipt in relay interference channels using game theory"):
  with members:
    - "power allocation strategies in energy harvesting wireless cooperative networks"
    - "simultaneous information and energy transfer in large scale networks with without relaying"
    - "beamforming for miso interference channels with qos and rf energy transfer"
    - "cooperative energy harvesting networks with spatially random users"
    - "simultaneous information and power transfer for broadband wireless systems"
    - "wireless information and power transfer energy efficiency optimization in ofdma systems"
    - "relaying protocols for wireless energy harvesting and information processing"
    - "wireless information and power transfer a dynamic power splitting approach"

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)