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: "range based coordinate alignment for cooperative mobile sensor network localization"
  Abstract: This paper studies the coordinate alignment problem for cooperative mobile sensor network localization with range measurements. The mobile network is consist of target nodes, each of which has only access position information in its individual {\em local} coordinate system, and anchor nodes with GPS position information. To localize target nodes, it is sufficient to align their local coordinate systems, which is formulated as a non-convex optimization problem over the rotation group $\text{SO}(3)$. By exploiting the problem structure with the projection technique, we reformulate it as an optimization problem with a convex objective function and easily handleable constraints. For the case with a target node and an anchor node, we design both iterative and recursive algorithms of explicit form and validate their advantages by comparing with the literature via simulations. Then, we extend to the case with multiple target nodes in a mobile sensor network. The advantages of our algorithms are finally validated via simulations.

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)