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: "millimeter wave energy harvesting"
  Abstract: The millimeter wave (mmWave) band, a prime candidate for 5G cellular networks, seems attractive for wireless energy harvesting since it will feature large antenna arrays and extremely dense base station (BS) deployments. The viability of mmWave for energy harvesting though is unclear, due to the differences in propagation characteristics, such as extreme sensitivity to building blockages. This paper considers a scenario where low-power devices extract energy and/or information from the mmWave signals. Using stochastic geometry, analytical expressions are derived for the energy coverage probability, the average harvested power, and the overall (energy-and-information) coverage probability at a typical wireless-powered device in terms of the BS density, the antenna geometry parameters, and the channel parameters. Numerical results reveal several network and device level design insights. At the BSs, optimizing the antenna geometry parameters, such as beamwidth, can maximize the network-wide energy coverage for a given user population. At the device level, the performance can be substantially improved by optimally splitting the received signal for energy and information extraction, and by deploying multi-antenna arrays. For the latter, an efficient low-power multi-antenna mmWave receiver architecture is proposed for simultaneous energy and information transfer. Overall, simulation results suggest that mmWave energy harvesting generally outperforms lower frequency solutions.

Connected through hyperedge HE-1 (induced by source paper "stochastic geometry modeling and analysis of finite millimeter wave wireless networks"):
  with members:
    - "spectral efficiency analysis of multi cell massive mimo systems with ricean fading"
    - "modeling and analyzing millimeter wave cellular systems"
    - "coverage analysis for millimeter wave networks the impact of directional antenna arrays"
    - "enclosed mmwave wearable networks feasibility and performance"
    - "stochastic geometry modeling and analysis of single and multi cluster wireless networks"
    - "fundamentals of modeling finite wireless networks using binomial point process"
    - "a comparison of mimo techniques in downlink millimeter wave cellular networks with hybrid beamforming"
    - "performance analysis of outdoor mmwave ad hoc networks"

Connected through hyperedge HE-2 (induced by source paper "a stochastic geometry analysis of energy harvesting in large scale wireless networks"):
  with members:
    - "performance analysis of ambient rf energy harvesting with repulsive point process modeling"
    - "a stochastic geometry analysis of inter cell interference coordination and intra cell diversity"
    - "sinr based k coverage probability in cellular networks with arbitrary shadowing"
    - "downlink capacity and base station density in cellular networks"
    - "a tractable approach to coverage and rate in cellular networks"

Connected through hyperedge HE-3 (induced by source paper "wireless powered dense cellular networks how many small cells do we need"):
  with members:
    - "user association in 5g networks a survey and an outlook"
    - "tractable resource management with uplink decoupled millimeter wave overlay in ultra dense cellular networks"
    - "wireless power transfer in massive mimo aided hetnets with user association"
    - "performance analysis of ambient rf energy harvesting with repulsive point process modeling"
    - "millimeter wave power transfer and information transmission"
    - "deploying dense networks for maximal energy efficiency small cells meet massive mimo"
    - "5g ultra dense cellular networks"
    - "throughput optimization for massive mimo systems powered by wireless energy transfer"

Connected through hyperedge HE-4 (induced by source paper "joint uplink and downlink coverage analysis of cellular based rf powered iot network"):
  with members:
    - "modeling and analysis of cellular networks using stochastic geometry a tutorial"
    - "a primer on cellular network analysis using stochastic geometry"
    - "enriched k tier hetnet model to enable the analysis of user centric small cell deployments"
    - "user point processes in cellular networks"
    - "optimal policies for wireless networks with energy harvesting transmitters and receivers effects of decoding costs"
    - "performance analysis of ambient rf energy harvesting with repulsive point process modeling"
    - "energy harvesting wireless communications a review of recent advances"
    - "wireless powered communications performance analysis and optimization"

Connected through hyperedge HE-5 (induced by source paper "power beacon assisted millimeter wave ad hoc networks"):
  with members:
    - "modeling and analyzing millimeter wave cellular systems"
    - "adaptively directional wireless power transfer for large scale sensor networks"
    - "performance analysis of outdoor mmwave ad hoc networks"
    - "device to device millimeter wave communications interference coverage rate and finite topologies"
    - "the intensity matching approach a tractable stochastic geometry approximation to system level analysis of cellular networks"
    - "communications and signals design for wireless power transmission"
    - "ambient rf energy harvesting in ultra dense small cell networks performance and trade offs"
    - "stochastic geometry modeling and analysis of multi tier millimeter wave cellular networks"

Connected through hyperedge HE-6 (induced by source paper "wireless power transfer in massive mimo aided hetnets with user association"):
  with members:
    - "user association in massive mimo hetnets"
    - "user association in 5g networks a survey and an outlook"
    - "joint downlink cell association and bandwidth allocation for wireless backhauling in two tier hetnets with large scale antenna arrays"
    - "performance analysis of simultaneous wireless information and power transfer with ambient rf energy harvesting"
    - "why to decouple the uplink and downlink in cellular networks and how to do it"
    - "5g cellular key enabling technologies and research challenges"
    - "millimeter wave power transfer and information transmission"
    - "throughput optimization for massive mimo systems powered by wireless energy transfer"

Connected through hyperedge HE-7 (induced by source paper "power availability aware cell association for energy harvesting small cell base stations"):
  with members:
    - "distributed user association in energy harvesting small cell networks an exchange economy with uncertainty"
    - "distributed user association in energy harvesting small cell networks a probabilistic bandit model"
    - "distributed multi relay selection in accumulate then forward energy harvesting relay networks"
    - "user association in 5g networks a survey and an outlook"
    - "online ski rental for on off scheduling of energy harvesting base stations"
    - "a survey of energy efficient techniques for 5g networks and challenges ahead"
    - "ambient rf energy harvesting in ultra dense small cell networks performance and trade offs"
    - "relay selection in wireless powered cooperative networks with energy storage"

Connected through hyperedge HE-8 (induced by source paper "frequency selective hybrid precoding for limited feedback millimeter wave systems"):
  with members:
    - "gram schmidt based greedy hybrid precoding for frequency selective millimeter wave mimo systems"
    - "device to device millimeter wave communications interference coverage rate and finite topologies"
    - "wireless powered communication opportunities and challenges"
    - "channel estimation and hybrid precoding for millimeter wave cellular systems"
    - "tractable model for rate in self backhauled millimeter wave cellular networks"
    - "simultaneous wireless information and power transfer in modern communication systems"
    - "coverage and rate analysis for millimeter wave cellular networks"
    - "what will 5g be"

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)