6Chen H., Jin H., Zhang M., Tan P., Zou D., Yuan P. Early experience in qos-based service grid architecture. In: Jeffrey Xu Yu, Lin Xue-Min, Lu Hong-Jun, Zhang Yan-Chun eds. Advanced Web Technologies and Applications. Lecture Notes in Computer Science 3007, Germany: Springer, 2004, 924～927
7Zeng L.Z., Benatallah B., A. Ngu H.H., Dumas M., Kalagnanam J., Chang H. QoS-aware middleware for Web services composition. IEEE Transactions on Software Engineering, 2004, 30(5): 311～327
8Ren Z., Cao J., Chan A., Li J. Composition and automation of grid services. In: Proceedings of the 5th International Workshop on Advanced Parallel Programming Technologies(APPT), Xiamen, China, 2003, 352～362
9Hamadi R., Benatallah B. A petri net-based model for Web service composition. In: Proceedings of the 14th Australasian Database Conference(ADC), Adelaide, Australia, 2003, 191～200
10Kirkpatrick S., Gelatt C., Vecchi D., Optimization by simulated annealing. Science, 1983, 220: 671～680
