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In the data grid environment, when users access to files, how to select the best site to obtain files from multiple replicas and reach the highest QOS (quality of service) in the cost of same price is a problem that need to be studied urgently, that is replica selection. In this paper, it proposes a new combination algorithm based on genetic algorithm and ant algorithm, which not only solves the inefficient...
The safe Pre-warning of construction project is a hot studying spot in current theoretical field. Whether the safety condition of a construction project can be accurately pre-warning or not, is key to the success of the project. This paper firstly overviews the present research condition of construction project safe pre-warning, sets up the pre-warning indicator system. Then accomplishes dynamic pre-warning...
Global optimization algorithms have received much attention recently. This paper presented a Knowledge-based Genetic Algorithm (KGA) for the global numerical optimization. In KGA, some innovative operators were proposed by integrating the empirical knowledge with the existing operation. In particular, we proposed two novel operators: knowledge-based mutation operator based on round or immunity operation,...
On the basis of the thought of system and fuzzy decision, the grey system theory is applied to solve the problem of UERR (underground engineering reinforcement and reconstruction), and index system of UERR is built. According to the strengthening of multiple targets optimization models of UERR a Pareto optimum concourse of many satisfied solution is got. The grey fuzzy optimal selection model of the...
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