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 energy transfer for two hop non regenerative mimo ofdm relay networks"
  Abstract: This paper investigates the simultaneous wireless information and energy transfer for the non-regenerative multiple-input multiple-output orthogonal frequency-division multiplexing (MIMO-OFDM) relaying system. By considering two practical receiver architectures, we present two protocols, time switching-based relaying (TSR) and power splitting-based relaying (PSR). To explore the system performance limits, we formulate two optimization problems to maximize the end-to-end achievable information rate with the full channel state information (CSI) assumption. Since both problems are non-convex and have no known solution method, we firstly derive some explicit results by theoretical analysis and then design effective algorithms for them. Numerical results show that the performances of both protocols are greatly affected by the relay position. Specifically, PSR and TSR show very different behaviors to the variation of relay position. The achievable information rate of PSR monotonically decreases when the relay moves from the source towards the destination, but for TSR, the performance is relatively worse when the relay is placed in the middle of the source and the destination. This is the first time such a phenomenon has been observed. In addition, it is also shown that PSR always outperforms TSR in such a MIMO-OFDM relaying system. Moreover, the effects of the number of antennas and the number of subcarriers are also discussed.

Connected through hyperedge HE-1 (induced by source paper "transmission delay minimization in wireless powered communication systems"):
  with members:
    - "power allocation and effective capacity of af successive relays"
    - "optimization and analysis of wireless powered multi antenna cooperative systems"
    - "cross layer optimization for ultra reliable and low latency radio access networks"
    - "wireless powered dual hop multi antenna relaying systems impact of csi and antenna correlation"
    - "effective capacity of receive antenna selection mimo ostbc systems in co channel interference"
    - "wireless charging technologies fundamentals standards and network applications"
    - "wireless powered communication networks an overview"
    - "some new research trends in wirelessly powered communications"

Connected through hyperedge HE-2 (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"
    - "transceiver design to maximize the weighted sum secrecy rate in full duplex swipt systems"
    - "energy efficient resource allocation for mobile edge computation offloading"
    - "power delay tradeoff in multi user mobile edge computing systems"

Connected through hyperedge HE-3 (induced by source paper "throughput maximization in two hop df multiple relay network with simultaneous wireless information and power transfer"):
  with members:
    - "sensitive and nonlinear far field rf energy harvesting in wireless communications"
    - "robust resource allocation for mimo wireless powered communication networks based on a non linear eh model"
    - "training based swipt optimal power splitting at the receiver"
    - "practical non linear energy harvesting model and resource allocation for swipt systems"
    - "information and energy cooperation in ofdm relaying protocols and optimization"
    - "joint power splitting and antenna selection in energy harvesting relay channels"
    - "wireless networks with rf energy harvesting a contemporary survey"
    - "wireless information and power transfer with full duplex relaying"

Connected through hyperedge HE-4 (induced by source paper "full duplex mimo ofdm communication with self energy recycling"):
  with members:
    - "non orthogonal multiple access in large scale heterogeneous networks"
    - "ambient rf energy harvesting in ultra dense small cell networks performance and trade offs"
    - "wireless networks with rf energy harvesting a contemporary survey"
    - "wireless information and power transfer in multiuser ofdm systems"
    - "wireless information and power transfer energy efficiency optimization in ofdma systems"
    - "relaying protocols for wireless energy harvesting and information processing"

Connected through hyperedge HE-5 (induced by source paper "energy efficient swipt in iot distributed antenna systems"):
  with members:
    - "simultaneous wireless information and power transfer in cooperative relay networks with rateless codes"
    - "artificial noise aided secrecy information and power transfer in ofdma systems"
    - "training based swipt optimal power splitting at the receiver"
    - "energy efficient resource assignment and power allocation in heterogeneous cloud radio access networks"
    - "information and energy cooperation in ofdm relaying protocols and optimization"
    - "energy harvesting for physical layer security in ofdma networks"
    - "secure and green swipt in distributed antenna networks with limited backhaul capacity"
    - "energy beamforming with one bit feedback"

Connected through hyperedge HE-6 (induced by source paper "wireless powered communications with finite battery and finite blocklength"):
  with members:
    - "ultra reliable short message relaying with wireless power transfer"
    - "wireless networks with energy harvesting and power transfer joint power and time allocation"
    - "wireless powered two way relaying with power splitting based energy accumulation"
    - "accumulate then forward an opportunistic relaying protocol for wireless powered cooperative communications"
    - "wireless powered relaying with finite block length codes"
    - "blocklength limited performance of relaying under quasi static rayleigh channels"
    - "on wirelessly powered communications with short packets"
    - "towards massive ultra reliable and low latency wireless communication with short packets"

Connected through hyperedge HE-7 (induced by source paper "joint resource allocation in swipt based multi antenna decode and forward relay networks"):
  with members:
    - "power allocation for secure swipt systems with wireless powered cooperative jamming"
    - "relaying strategies for wireless powered mimo relay networks"
    - "distributed power splitting for swipt in relay interference channels using game theory"
    - "joint wireless information and power transfer for an autonomous multiple antenna relay system"
    - "information and energy cooperation in ofdm relaying protocols and optimization"
    - "joint power splitting and antenna selection in energy harvesting relay channels"
    - "energy harvesting for physical layer security in ofdma networks"
    - "enhancing wireless information and power transfer by exploiting multi antenna techniques"

Connected through hyperedge HE-8 (induced by source paper "simultaneous wireless information and power transfer in cooperative relay networks with rateless codes"):
  with members:
    - "optimum transmission policies for energy harvesting sensor networks powered by a mobile control center"
    - "practical non linear energy harvesting model and resource allocation for swipt systems"
    - "enhancing wireless information and power transfer by exploiting multi antenna techniques"
    - "outage analysis and optimization for time switching based two way relaying with energy harvesting relay node"
    - "wireless networks with rf energy harvesting a contemporary survey"
    - "power allocation strategies in energy harvesting wireless cooperative networks"
    - "application of smart antenna technologies in simultaneous wireless information and power transfer"
    - "wireless information and power transfer with full duplex relaying"

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)