Learn More
This paper studies the strategies for multi-objective optimization in a dynamic environment. In particular, we focus on problems with objective replacement, where some objectives may be replaced with new objectives during evolution. It is shown that the Pareto-optimal sets before and after the objective replacement share some common members. Based on this(More)
In this paper, an evolutionary algorithm for multi-objective optimization problems in a dynamic environment is studied. In particular, we focus on decremental multi-objective optimization problems, where some objectives may be deleted during evolution-for such a process we call it as objective decrement. It is shown that the Pareto-optimal set after(More)
Classification is one of the most significant methods in predictive analysis for categorical labeled problem. However, an accurate classification model is difficult to train for some real cases due to imbalanced samples, large fluctuating records, and overlapping class labels. For solving the above problems, in this work, we introduce a Two-Stage with(More)
This paper presents a new evolutionary approach for function optimization problems particle swarm assisted incremental evolution strategy (PIES). Two strategies are proposed. One is incremental optimization that the whole evolution consists of several phases and one more variable is focused in each phase. The number of phases is equal to the number of(More)
This paper presents a novel evolutionary approach for function optimization Incremental Evolution Strategy (IES). Two strategies are proposed. One is to evolve the input variables incrementally. The whole evolution consists of several phases and one more variable is focused in each phase. The number of phases is equal to the number of variables in maximum.(More)
Locomotive assignment is a classic planning problem in railway industry. Different models and algorithms (e.g., network flow model, MIP model, adaptive dynamic programming) are proposed to solve this problem and have got remarkable progress. In practice, the locomotives are usually in the size of hundreds to even more than a thousand. So assigning(More)
  • 1