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: "complex workflow management and integration of distributed computing resources by science gateway portal for molecular dynamics simulations in materials science"
  Abstract: The "IMP Science Gateway Portal" (http://scigate.imp.kiev.ua) for complex workflow management and inte- gration of distributed computing resources (like clusters, service grids, desktop grids, clouds) is presented. It is created on the basis of WS-PGRADE and gUSE technologies, where WS-PGRADE is designed for science workflow operation and gUSE - for smooth integration of available resources for parallel and distributed computing in various heterogeneous distributed computing infrastructures (DCI). The typical scientific workflow with possible scenarios of its preparation and usage is considered. Several typical science applications (scientific workflows) are considered for molecular dynamics (MD) simulations of complex behavior of various nanostructures (nanoindentation of graphene layers, defect system re- laxation in metal nanocrystals, thermal stability of boron nitride nanotubes, etc.). The advantages and drawbacks of the solution are shortly analyzed in the context of its practical applications for MD simulations in materials science, physics and nanotechnologies with available heterogeneous DCIs.

Connected through hyperedge HE-1 (induced by source paper "synergy of volunteer measurements and volunteer computing for effective data collecting processing simulating and analyzing on a worldwide scale"):
  with members:
    - "imp science gateway from the portal to the hub of virtual experimental labs in materials science"
    - "from quantity to quality massive molecular dynamics simulation of nanostructures under plastic deformation in desktop and service grid distributed computing infrastructure"
    - "the computational and storage potential of volunteer computing"
    - "auger xtremweb monte carlo computation on a global computing platform"

Connected through hyperedge HE-2 (induced by source paper "science gateway for distributed multiscale course management in e science and e learning use case for study and investigation of functionalized nanomaterials"):
  with members:
    - "opencourseware observatory does the quality of opencourseware live up to its promise"
    - "imp science gateway from the portal to the hub of virtual experimental labs in materials science"
    - "from quantity to quality massive molecular dynamics simulation of nanostructures under plastic deformation in desktop and service grid distributed computing infrastructure"

Connected through hyperedge HE-3 (induced by source paper "imp science gateway from the portal to the hub of virtual experimental labs in materials science"):
  with members:
    - "from quantity to quality massive molecular dynamics simulation of nanostructures under plastic deformation in desktop and service grid distributed computing infrastructure"

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.CE(Computational Engineering, Finance, and Science)