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: "stiffness analysis of 3 d o f overconstrained translational parallel manipulators"
  Abstract: The paper presents a new stiffness modelling method for overconstrained parallel manipulators, which is applied to 3-d.o.f. translational mechanisms. It is based on a multidimensional lumped-parameter model that replaces the link flexibility by localized 6-d.o.f. virtual springs. In contrast to other works, the method includes a FEA-based link stiffness evaluation and employs a new solution strategy of the kinetostatic equations, which allows computing the stiffness matrix for the overconstrained architectures and for the singular manipulator postures. The advantages of the developed technique are confirmed by application examples, which deal with comparative stiffness analysis of two translational parallel manipulators.

Connected through hyperedge HE-1 (induced by source paper "kinematic analysis and trajectory planning of the orthoglide 5 axis"):
  with members:
    - "kinematic and dynamic analyses of the orthoglide 5 axis"
    - "a six degree of freedom haptic device based on the orthoglide and a hybrid agile eye"
    - "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-2 (induced by source paper "enhanced stiffness modeling of manipulators with passive joints"):
  with members:
    - "stiffness analysis of parallel manipulators with preloaded passive joints"
    - "stiffness analysis of multi chain parallel robotic systems"
    - "stiffness analysis of overconstrained parallel manipulators"
    - "accuracy improvement for stiffness modeling of parallel manipulators"
    - "architecture optimization of a 3 dof translational parallel mechanism for machining applications the orthoglide"
    - "parametric stiffness analysis of the orthoglide"
    - "design strategies for the geometric synthesis of orthoglide type mechanisms"

Connected through hyperedge HE-3 (induced by source paper "nonlinear effects in stiffness modeling of robotic manipulators"):
  with members:
    - "stiffness analysis of overconstrained parallel manipulators"
    - "accuracy improvement for stiffness modeling of parallel manipulators"
    - "architecture optimization of a 3 dof translational parallel mechanism for machining applications the orthoglide"
    - "parametric stiffness analysis of the orthoglide"

Connected through hyperedge HE-4 (induced by source paper "kinematic and dynamic analysis of the 2 dof spherical wrist of orthoglide 5 axis"):
  with members:
    - "a six degree of freedom haptic device based on the orthoglide and a hybrid agile eye"
    - "architecture optimization of a 3 dof translational parallel mechanism for machining applications the orthoglide"
    - "design strategies for the geometric synthesis of orthoglide type mechanisms"

Connected through hyperedge HE-5 (induced by source paper "stiffness analysis of multi chain parallel robotic systems"):
  with members:
    - "stiffness analysis of overconstrained parallel manipulators"

Connected through hyperedge HE-6 (induced by source paper "kinematic and dynamic analyses of the orthoglide 5 axis"):
  with members:
    - "a six degree of freedom haptic device based on the orthoglide and a hybrid agile eye"
    - "kinematics and workspace analysis of a three axis parallel manipulator the orthoglide"
    - "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)