Qiu Yuanying

Robustness of Cooperation on Highly Clustered Scale-Free Networks

We study the effect of mutation on the evolutionary prisoners dilemma in highly clustered scale-free networks. It is found that cooperation is more sensitive and vulnerable to strategy mutation in more highly clustered networks. For small mutation rates, high clustering coefficient promotes cooperation. For medium mutation rates, high clustering coefficient inhibits the emergence of cooperation. For large mutation rates, cooperation is insensitive to clustering property. We provide explanations for the effects of clustering on cooperation with varied mutation rates.

Integrated System of ERP and MES Based on DHNN Evaluation

To overcome the information silos problem in application of multiple manufacturing systems, an integrated system of ERP (Enterprise Resources Planning) and MES (Manufacturing Execution System) based on DHNN (Discrete Hopfield Neural Networks) evaluation is presented. First, the information needed to be integrated is given, key technologies of database integration were studied, and the data warehouse of these two heterogeneous systems was established. Then the integrated system was evaluated by DHNN method. The evaluation result shows that this integration system is better than ERP or MES and it can improve the efficiency of production in manufacturing enterprise.

Three-dimensional digital process typesetting and printing system based on DELMIA

Though more and more enterprise is using DELMIA in China, but application level in DELMIA still focusing on process verifying and simulation. Directly we can not use DELMIA to output process card in manufacturing, because ability of DELMIA in two-dimension process card custom, typesetting and printing function is too young for actual use. The paper develop a three-dimension process typesetting and printing aided system based on DELMIA and CATIA for solving engineering application problem. The system has key function include process card custom, process file typesetting, two-dimension graph corresponding three-dimension model. Furthermore the system is applied in enterprise using DELMIA to realize dynamic expanding by extending and adopting ability of system.

Analysis on the Static Stiffness of Wire-driven Parallel Manipulators

Based on differential transform and linear geometry theory,a stiffness model of wire-driven parallel manipulators is established,including the elastic deformation of joints and wire tension.And a mathematical expression of the stiffness matrix is developed.Not only the influence of elastic deformation of the drive units and wires on the mechanism stiffness,but also the change of the structure matrix due to the movement of end-effectors under the action of generalized external force are considered in the stiffness model.The structure matrix derivative with respect to the position and orientation of the end-effectors,namely three dimension Hessian matrix is obtained by introducing linear vector.The model shows that the stiffness matrix of wire-driven parallel manipulators consists of two parts,one of which depends mainly on the geometric distribution of the wires,the position and orientation of the end-effectors,and the physical property of the driven links,while the other is a product of the Hessian matrix and the wire tension vector.The simulation and experiments of a five-meter scaled model of large spherical radio telescope verify the accuracy and effectiveness of the proposed method.