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: "transceiver design to maximize the weighted sum secrecy rate in full duplex swipt systems"
  Abstract: This letter considers secrecy simultaneous wireless information and power transfer (SWIPT) in full-duplex (FD) systems. In such a system, FD capable base station (FD-BS) is designed to transmit data to one downlink user and concurrently receive data from one uplink user, while one idle user harvests the radio-frequency (RF) signals’ energy to extend its lifetime. Moreover, to prevent eavesdropping, artificial noise (AN) is exploited by FD-BS to degrade the channel of the idle user, as well as to provide energy supply to the idle user. To maximize the weighted sum of downlink secrecy rate and uplink secrecy rate, we jointly optimize the information covariance matrix, AN covariance matrix, and receiver vector, under the constraints of the sum transmission power of FD-BS and the minimum harvested energy of the idle user. Since the problem is nonconvex, the log-exponential reformulation and sequential parametric convex approximation (SPCA) method are used. Extensive simulation results are provided and demonstrate that our proposed FD scheme extremely outperforms the half-duplex scheme.

Connected through hyperedge HE-1 (induced by source paper "fog assisted multi user swipt networks local computing or offloading"):
  with members:
    - "group cooperation with optimal resource allocation in wireless powered communication networks"
    - "simultaneous wireless information and power transfer in cooperative relay networks with rateless codes"
    - "capacity region of gaussian multiple access channels with energy harvesting and energy cooperation"
    - "joint offloading and computing optimization in wireless powered mobile edge computing systems"
    - "joint computation and communication cooperation for mobile edge computing"
    - "energy efficient resource allocation for mobile edge computation offloading"
    - "power delay tradeoff in multi user mobile edge computing systems"
    - "decentralized computation offloading game for mobile cloud computing"

Connected through hyperedge HE-2 (induced by source paper "a survey of physical layer security techniques for 5g wireless networks and challenges ahead"):
  with members:
    - "secure massive mimo systems with limited rf chains"
    - "secure transmission with large numbers of antennas and finite alphabet inputs"
    - "probabilistically robust swipt for secrecy misome systems"
    - "exploiting full duplex receivers for achieving secret communications in multiuser miso networks"
    - "full duplex bidirectional secure communications under perfect and distributionally ambiguous eavesdropper s csi"
    - "safeguarding decentralized wireless networks using full duplex jamming receivers"
    - "physical layer security aware routing and performance tradeoffs in ad hoc networks"
    - "hybrid procoder and combiner design for secure transmission in mmwave mimo systems"

Connected through hyperedge HE-3 (induced by source paper "secure beamforming in full duplex swipt systems with loopback self interference cancellation"):
  with members:
    - "probabilistically robust swipt for secrecy misome systems"
    - "secure beamforming in full duplex swipt systems"
    - "multi objective optimization for robust power efficient and secure full duplex wireless communication systems"
    - "robust beamforming for secure communication in systems with wireless information and power transfer"
    - "secure and green swipt in distributed antenna networks with limited backhaul capacity"
    - "secure beamforming for mimo broadcasting with wireless information and power transfer"
    - "secrecy wireless information and power transfer with miso beamforming"
    - "design and characterization of a full duplex multiantenna system for wifi networks"

Connected through hyperedge HE-4 (induced by source paper "beamforming and power splitting designs for an aided secure multi user mimo swipt systems"):
  with members:
    - "physical layer security in mimo backscatter wireless systems"
    - "wireless powered communication opportunities and challenges"
    - "robust beamforming for secure communication in systems with wireless information and power transfer"
    - "secure beamforming for mimo broadcasting with wireless information and power transfer"
    - "secrecy wireless information and power transfer with miso beamforming"
    - "power efficient and secure multiuser communication systems with wireless information and power transfer"
    - "application of smart antenna technologies in simultaneous wireless information and power transfer"
    - "spatially selective artificial noise aided transmit optimization for miso multi eves secrecy rate maximization"

Connected through hyperedge HE-5 (induced by source paper "secure full duplex two way relaying for swipt"):
  with members:
    - "probabilistically robust swipt for secrecy misome systems"
    - "joint transmit power and relay two way beamforming optimization for energy harvesting full duplex communications"
    - "sum secrecy rate maximization for full duplex two way relay networks using alamouti based rank two beamforming"
    - "wireless information and power transfer in full duplex communication systems"
    - "two way beamforming optimization for full duplex swipt systems"
    - "mimo broadcasting for simultaneous wireless information and power transfer"

Connected through hyperedge HE-6 (induced by source paper "full duplex bidirectional secure communications under perfect and distributionally ambiguous eavesdropper s csi"):
  with members:
    - "sum secrecy rate maximization for full duplex two way relay networks using alamouti based rank two beamforming"
    - "multi objective optimization for robust power efficient and secure full duplex wireless communication systems"
    - "improving physical layer secrecy using full duplex jamming receivers"
    - "optimal and robust transmit designs for miso channel secrecy by semidefinite programming"

Connected through hyperedge HE-7 (induced by source paper "destination aided wireless power transfer in energy limited cognitive relay systems"):
  with members:
    - "joint wireless information and power transfer for an autonomous multiple antenna relay system"
    - "multi objective optimization for robust power efficient and secure full duplex wireless communication systems"
    - "joint power splitting and secure beamforming design in the wireless powered untrusted relay networks"
    - "joint beamforming optimization and power control for full duplex mimo two way relay channel"
    - "information and energy cooperation in cognitive radio networks"
    - "secrecy wireless information and power transfer with miso beamforming"
    - "throughput maximization in wireless powered communication networks"
    - "cooperative cognitive networks optimal distributed and low complexity algorithms"

Connected through hyperedge HE-8 (induced by source paper "transceiver design for cooperative non orthogonal multiple access systems with wireless energy transfer"):
  with members:
    - "cooperative non orthogonal multiple access with simultaneous wireless information and power transfer"
    - "information and energy cooperation in cognitive radio networks"
    - "on the performance of non orthogonal multiple access in 5g systems with randomly deployed users"
    - "relaying protocols for wireless energy harvesting and information processing"
    - "framework for link level energy efficiency optimization with informed transmitter"
    - "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)