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: "reservoir computing with a single time delay autonomous boolean node"
  Abstract: N.D.H. and D.J.G. gratefully acknowledge financial support from the U.S. Army Research Office through Grant No. W911NF-12-1-0099. N.D.H. also acknowledges the U.S. National Science Foundation for support through Grant No. DGE-1068871. M.C.S. and I.F. acknowledge support from Ministerio de Economia y Competitividad (Spain) under Project No. TEC2012-36335 (TRIPHOP) and Govern de les Illes Balears via the program Grups Competitius.

Connected through hyperedge HE-1 (induced by source paper "recent advances in physical reservoir computing a review"):
  with members:
    - "distributive dynamic spectrum access through deep reinforcement learning a reservoir computing based approach"
    - "echo state networks are universal"
    - "reservoir computing hardware with cellular automata"
    - "scaling up echo state networks with multiple light scattering"
    - "reinforcement learning in a large scale photonic recurrent neural network"
    - "reservoir computing universality with stochastic inputs"
    - "the case for rejecting the memristor as a fundamental circuit element"
    - "reservoir computing using non uniform binary cellular automata"

Connected through hyperedge HE-2 (induced by source paper "a substrate independent framework to characterise reservoir computers"):
  with members:
    - "when does a physical system compute"
    - "nano scale reservoir computing"
    - "optoelectronic reservoir computing"

Connected through hyperedge HE-3 (induced by source paper "model free prediction of spatiotemporal dynamical systems with recurrent neural networks role of network spectral radius"):
  with members:
    - "hybrid forecasting of chaotic processes using machine learning in conjunction with a knowledge based model"

Connected through hyperedge HE-4 (induced by source paper "an fpga implementation of a time delay reservoir using stochastic logic"):
  with members:
    - "optoelectronic reservoir computing"

Connected through hyperedge HE-5 (induced by source paper "rapid time series prediction with a hardware based reservoir computer"):
  with members:
    - "hybrid forecasting of chaotic processes using machine learning in conjunction with a knowledge based model"

Connected through hyperedge HE-6 (induced by source paper "hybrid forecasting of chaotic processes using machine learning in conjunction with a knowledge based model"):
  with members:
    - "brain inspired photonic signal processor for generating periodic patterns and emulating chaotic systems"

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.ET(Emerging Technologies)