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: "sampling for data freshness optimization non linear age functions"
  Abstract: In this paper, we study how to take samples at a data source for improving the freshness of received data samples at a remote receiver. We use non-linear functions of the age of information to measure data freshness, and provide a survey of non-linear age functions and their applications. The sampler design problem is studied to optimize these data freshness metrics, even when there is a sampling rate constraint. This sampling problem is formulated as a constrained Markov decision process (MDP) with a possibly uncountable state space. We present a complete characterization of the optimal solution to this MDP: The optimal sampling policy is a deterministic or randomized threshold policy, where the threshold and the randomization probabilities are characterized based on the optimal objective value of the MDP and the sampling rate constraint. The optimal sampling policy can be computed by bisection search, and the curse of dimensionality is circumvented. These age optimality results hold for (i) general data freshness metrics represented by monotonic functions of the age of information, (ii) general service time distributions of the queueing server, (iii) both continuoustime and discrete-time sampling problems, and (iv) sampling problems both with and without the sampling rate constraint. Numerical results suggest that the optimal sampling policies can be much better than zero-wait sampling and the classic uniform sampling.

Connected through hyperedge HE-1 (induced by source paper "urgency of information for context aware timely status updates in remote control systems"):
  with members:
    - "a general formula for the stationary distribution of the age of information and its application to single server queues"
    - "sampling for remote estimation through queues age of information and beyond"
    - "the age of incorrect information a new performance metric for status updates"
    - "context aware information lapse for timely status updates in remote control systems"
    - "scheduling policies for minimizing age of information in broadcast wireless networks"
    - "can decentralized status update achieve universally near optimal age of information in wireless multiaccess channels"
    - "age of information in g g 1 1 systems"
    - "stochastic control with stale information part i fully observable systems"

Connected through hyperedge HE-2 (induced by source paper "minimum age of information in the internet of things with non uniform status packet sizes"):
  with members:
    - "average peak age of information minimization in uav assisted iot networks"
    - "age optimal transmission of rateless codes in an erasure channel"
    - "beyond 5g with uavs foundations of a 3d wireless cellular network"
    - "a reinforcement learning approach to age of information in multi user networks"
    - "can decentralized status update achieve universally near optimal age of information in wireless multiaccess channels"
    - "controlling packet drops to improve freshness of information"
    - "joint status sampling and updating for minimizing age of information in the internet of things"
    - "optimizing information freshness in wireless networks under general interference constraints"

Connected through hyperedge HE-3 (induced by source paper "closed form analysis of non linear age of information in status updates with an energy harvesting transmitter"):
  with members:
    - "a general formula for the stationary distribution of the age of information and its application to single server queues"
    - "sampling for remote estimation through queues age of information and beyond"
    - "scheduling policies for minimizing age of information in broadcast wireless networks"
    - "can decentralized status update achieve universally near optimal age of information in wireless multiaccess channels"
    - "age of information in g g 1 1 systems"
    - "delay and peak age violation probability in short packet transmissions"
    - "age minimal transmission for energy harvesting sensors with finite batteries online policies"
    - "scheduling status updates to minimize age of information with an energy harvesting sensor"

Connected through hyperedge HE-4 (induced by source paper "optimizing information freshness using low power status updates via sleep wake scheduling"):
  with members:
    - "fundamental limits of many user mac with finite payloads and fading"
    - "broadcast age of information in csma ca based wireless networks"
    - "energy efficient coded random access for the wireless uplink"
    - "minimizing the age of information in a csma environment"
    - "age optimal updates of multiple information flows"
    - "scheduling policies for minimizing age of information in broadcast wireless networks"
    - "timely status update in massive iot systems decentralized scheduling for wireless uplinks"
    - "distributed scheduling algorithms for optimizing information freshness in wireless networks"

Connected through hyperedge HE-5 (induced by source paper "context aware information lapse for timely status updates in remote control systems"):
  with members:
    - "a general formula for the stationary distribution of the age of information and its application to single server queues"
    - "sampling for remote estimation through queues age of information and beyond"
    - "scheduling policies for minimizing age of information in broadcast wireless networks"
    - "can decentralized status update achieve universally near optimal age of information in wireless multiaccess channels"
    - "age of information in g g 1 1 systems"
    - "delay and peak age violation probability in short packet transmissions"
    - "age minimal transmission for energy harvesting sensors with finite batteries online policies"
    - "scheduling status updates to minimize age of information with an energy harvesting sensor"

Connected through hyperedge HE-6 (induced by source paper "optimal age energy trade off via sleep wake scheduling"):
  with members:
    - "fundamental limits of many user mac with finite payloads and fading"
    - "broadcast age of information in csma ca based wireless networks"
    - "energy efficient coded random access for the wireless uplink"
    - "minimizing the age of information in a csma environment"
    - "timely status update in massive iot systems decentralized scheduling for wireless uplinks"
    - "optimizing information freshness in wireless networks under general interference constraints"
    - "optimizing age of information in wireless networks with perfect channel state information"
    - "age optimal information updates in multihop networks"

Connected through hyperedge HE-7 (induced by source paper "age of information in a multiple access channel with heterogeneous traffic and an energy harvesting node"):
  with members:
    - "optimal status updating for an energy harvesting sensor with a noisy channel"
    - "age of information and throughput in a shared access network with heterogeneous traffic"
    - "coded status updates in an energy harvesting erasure channel"
    - "optimal policies for status update generation in a wireless system with heterogeneous traffic"
    - "optimizing information freshness in wireless networks under general interference constraints"
    - "age minimal online policies for energy harvesting sensors with random battery recharges"
    - "a game theoretic approach to dsrc and wifi coexistence"
    - "scheduling status updates to minimize age of information with an energy harvesting sensor"

Connected through hyperedge HE-8 (induced by source paper "delay violation probability and age of information interplay in the two user multiple access channel"):
  with members:
    - "age of information in a multiple access channel with heterogeneous traffic and an energy harvesting node"
    - "age of information and throughput in a shared access network with heterogeneous traffic"
    - "optimal policies for status update generation in a wireless system with heterogeneous traffic"
    - "qos provisioning in large wireless networks"
    - "reliable transmission of short packets through queues and noisy channels under latency and peak age violation guarantees"
    - "optimizing information freshness in wireless networks under general interference constraints"
    - "age and value of information non linear age case"
    - "on the delay performance of interference channels"

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.SY(Systems and Control)