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: "a comparative study of parallel kinematic architectures for machining applications"
  Abstract: Parallel kinematic mechanisms are interesting alternative designs for machining applications. Three 2-DOF parallel mechanism architectures dedicated to machining applications are studied in this paper. The three mechanisms have two constant length struts gliding along fixed linear actuated joints with different relative orientation. The comparative study is conducted on the basis of a same prescribed Cartesian workspace for the three mechanisms. The common desired workspace properties are a rectangular shape and given kinetostatic performances. The machine size of each resulting design is used as a comparative criterion. The 2-DOF machine mechanisms analyzed in this paper can be extended to 3-axis machines by adding a third joint.

Connected through hyperedge HE-1 (induced by source paper "a translational three degrees of freedom parallel mechanism with partial motion decoupling and analytic direct kinematics"):
  with members:
    - "architecture optimization of a 3 dof translational parallel mechanism for machining applications the orthoglide"
    - "design of a 3 axis parallel machine tool for high speed machining the orthoglide"
    - "workspace analysis of the orthoglide using interval analysis"

Connected through hyperedge HE-2 (induced by source paper "kinematic calibration of orthoglide type mechanisms from observation of parallel leg motions"):
  with members:
    - "architecture optimization of a 3 dof translational parallel mechanism for machining applications the orthoglide"
    - "kinematics and workspace analysis of a three axis parallel manipulator the orthoglide"
    - "kinematic analysis of a new parallel machine tool the orthoglide"
    - "design strategies for the geometric synthesis of orthoglide type mechanisms"

Connected through hyperedge HE-3 (induced by source paper "calibration of 3 d o f translational parallel manipulators using leg observations"):
  with members:
    - "kinematics and workspace analysis of a three axis parallel manipulator the orthoglide"
    - "kinematic calibration of orthoglide type mechanisms"
    - "kinematic analysis of a new parallel machine tool the orthoglide"
    - "design strategies for the geometric synthesis of orthoglide type mechanisms"

Connected through hyperedge HE-4 (induced by source paper "design strategies for the geometric synthesis of orthoglide type mechanisms"):
  with members:
    - "architecture optimization of a 3 dof translational parallel mechanism for machining applications the orthoglide"
    - "kinematics and workspace analysis of a three axis parallel manipulator the orthoglide"
    - "kinematic analysis of a new parallel machine tool the orthoglide"
    - "the orthoglide kinematics and workspace analysis"
    - "workspace analysis of the orthoglide using interval analysis"

Connected through hyperedge HE-5 (induced by source paper "architecture optimization of a 3 dof translational parallel mechanism for machining applications the orthoglide"):
  with members:
    - "design of a 3 axis parallel machine tool for high speed machining the orthoglide"
    - "kinematic analysis of a new parallel machine tool the orthoglide"
    - "workspace analysis of the orthoglide using interval analysis"

Connected through hyperedge HE-6 (induced by source paper "a novel method for the design of 2 dof parallel mechanisms for machining applications"):
  with members:
    - "on the characterization of the regions of feasible trajectories in the workspace of parallel manipulators"
    - "design of a 3 axis parallel machine tool for high speed machining the orthoglide"
    - "kinematic analysis of a new parallel machine tool the orthoglide"

Connected through hyperedge HE-7 (induced by source paper "an interval analysis based study for the design and the comparison of 3 dof parallel kinematic machines"):
  with members:
    - "architecture optimization of a 3 dof translational parallel mechanism for machining applications the orthoglide"
    - "definition sets for the direct kinematics of parallel manipulators"
    - "workspace analysis of the orthoglide using interval analysis"

Connected through hyperedge HE-8 (induced by source paper "calibration of quasi isotropic parallel kinematic machines orthoglide"):
  with members:
    - "kinematic calibration of orthoglide type mechanisms"
    - "design strategies for the geometric synthesis of orthoglide type mechanisms"

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.RO(Robotics)