human: Given a hyperedge-centered hypergraph: <hypergraph>, where the center hyperedge is induced by one source paper and its member nodes are the cited papers.

Details of the hypergraph:
Center hyperedge (induced by source paper "path placement optimization of manipulators based on energy consumption application to the orthoglide 3 axis"):
  Abstract: This paper deals with the optimal path placement for a manipulator based on energy consumption. It proposes a methodology to determine the optimal location of a given test path within the workspace of a manipulator with minimal electric energy used by the actuators while taking into account the geometric, kinematic and dynamic constraints. The proposed methodology is applied to the Orthoglide~3-axis, a three-degree-of-freedom translational parallel kinematic machine (PKM), as an illustrative example.

Includes members:
  Member "stiffness analysis of overconstrained parallel manipulators":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "cad based approach for identification of elasto static parameters of robotic manipulators")
  Member "architecture optimization of a 3 dof translational parallel mechanism for machining applications the orthoglide":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "a translational three degrees of freedom parallel mechanism with partial motion decoupling and analytic direct kinematics")
  Member "parametric stiffness analysis of the orthoglide":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "cad based approach for identification of elasto static parameters of robotic manipulators")
  Member "kinematic analysis of a new parallel machine tool the orthoglide":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "navaro ii a novel scissor based planar parallel robot")

Question: Please tell me which class the source paper 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)