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: "power grid vulnerability to geographically correlated failures analysis and control implications"
  Abstract: We consider power line outages in the transmission system of the power grid, and specifically those caused by a natural disaster or a large scale physical attack. In the transmission system, an outage of a line may lead to overload on other lines, thereby eventually leading to their outage. While such cascading failures have been studied before, our focus is on cascading failures that follow an outage of several lines in the same geographical area. We provide an analytical model of such failures, investigate the model's properties, and show that it differs from other models used to analyze cascades in the power grid (e.g., epidemic/percolation-based models). We then show how to identify the most vulnerable locations in the grid and perform extensive numerical experiments with real grid data to investigate the various effects of geographically correlated outages and the resulting cascades. These results allow us to gain insights into the relationships between various parameters and performance metrics, such as the size of the original event, the final number of connected components, and the fraction of demand (load) satisfied after the cascade. In particular, we focus on the timing and nature of optimal control actions used to reduce the impact of a cascade, in real time. We also compare results obtained by our model to the results of a real cascade that occurred during a major blackout in the San Diego area on Sept. 2011. The analysis and results presented in this paper will have implications both on the design of new power grids and on identifying the locations for shielding, strengthening, and monitoring efforts in grid upgrades.

Connected through hyperedge HE-1 (induced by source paper "an open source modeling framework for interdependent energy transportation communication infrastructure in smart and connected communities"):
  with members:
    - "a vision of 6g wireless systems applications trends technologies and open research problems"
    - "joint communication and control for wireless autonomous vehicular platoon systems"
    - "cyber physical security and safety of autonomous connected vehicles optimal control meets multi armed bandit learning"
    - "optimal operation of interdependent power systems and electrified transportation networks"
    - "game theory for secure critical interdependent gas power water infrastructure"
    - "colonel blotto game for secure state estimation in interdependent critical infrastructure"
    - "unmanned aerial vehicle with underlaid device to device communications performance and tradeoffs"

Connected through hyperedge HE-2 (induced by source paper "less is more real time failure localization in power systems"):
  with members:
    - "failure localization in power systems via tree partitions"
    - "design and stability of load side primary frequency control in power systems"

Connected through hyperedge HE-3 (induced by source paper "failure localization in power systems via tree partitions"):
  with members:
    - "graph laplacian spectrum and primary frequency regulation"
    - "an interaction model for simulation and mitigation of cascading failures"
    - "cascading failures in power grids analysis and algorithms"

Connected through hyperedge HE-4 (induced by source paper "resilience of energy infrastructure and services modeling data analytics and metrics"):
  with members:
    - "non stationary random process for large scale failure and recovery of power distribution"
    - "on the definition of cyber physical resilience in power systems"
    - "cascading link failure in the power grid a percolation based analysis"

Connected through hyperedge HE-5 (induced by source paper "react to cyber attacks on power grids"):
  with members:
    - "expose the line failures following a cyber physical attack on the power grid"
    - "subspace methods for data attack on state estimation a data driven approach"

Connected through hyperedge HE-6 (induced by source paper "computing optimal control of cascading failure in dc networks"):
  with members:
    - "robust network routing under cascading failures"

Connected through hyperedge HE-7 (induced by source paper "on robustness in multilayer interdependent network"):
  with members:
    - "on the entity hardening problem in multi layered interdependent networks"

Connected through hyperedge HE-8 (induced by source paper "on hardening problems in critical infrastructure systems"):
  with members:
    - "analyzing cascading failures in smart grids under random and targeted attacks"

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)