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: "design of a 3 axis parallel machine tool for high speed machining the orthoglide"
  Abstract: The Orthoglide project aims at designing a new 3-axis machine tool for High Speed Machining. Basis kinematics is a 3 degree-of-freedom translational parallel mechanism. This basis was submitted to isotropic and manipulability constraints that allowed the optmization of its kinematic architecture and legs architecture. Thus, several leg morphologies are convenient for the chosen mechanism. We explain the process that led us to the choice we made for the Orthoglide. A static study is presented to show how singular configurations of the legs can cause stiffness problems.

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"
    - "a comparative study of parallel kinematic architectures for machining applications"
    - "workspace analysis of the orthoglide using interval analysis"

Connected through hyperedge HE-2 (induced by source paper "a six degree of freedom haptic device based on the orthoglide and a hybrid agile eye"):
  with members:
    - "architecture optimization of a 3 dof translational parallel mechanism for machining applications the orthoglide"
    - "a new concept of modular parallel mechanism for machining applications"
    - "sensitivity analysis of the orthoglide a 3 dof translational parallel kinematic machine"

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

Connected through hyperedge HE-4 (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"
    - "a comparative study of parallel kinematic architectures for machining applications"
    - "kinematic analysis of a new parallel machine tool the orthoglide"

Connected through hyperedge HE-5 (induced by source paper "a new six degree of freedom haptic device based on the orthoglide and the agile eye"):
  with members:
    - "architecture optimization of a 3 dof translational parallel mechanism for machining applications the orthoglide"
    - "a new concept of modular parallel mechanism for machining applications"

Connected through hyperedge HE-6 (induced by source paper "kinematics and workspace analysis of a three axis parallel manipulator the orthoglide"):
  with members:
    - "kinematic analysis of a new parallel machine tool the orthoglide"

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)