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一种多约束关联挖掘算法 被引量:3
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作者 关心 李广原 《计算机应用研究》 CSCD 北大核心 2012年第4期1294-1296,共3页
约束关联挖掘是在把项或项集限制在用户给定的某一条件或多个条件下的关联挖掘,是一种重要的关联挖掘类型,在现实中有着不少的应用。但由于大多数算法处理的约束条件类型单一,提出一种多约束关联挖掘算法。该算法以FP-growth为基础,创... 约束关联挖掘是在把项或项集限制在用户给定的某一条件或多个条件下的关联挖掘,是一种重要的关联挖掘类型,在现实中有着不少的应用。但由于大多数算法处理的约束条件类型单一,提出一种多约束关联挖掘算法。该算法以FP-growth为基础,创建项集的条件数据库。利用非单调性和单调性约束的性质,采用多种剪枝策略,快速寻找约束点。实验证明,该算法能有效地挖掘多约束条件下的关联规则,且可扩展性能很好。 展开更多
关键词 数据挖掘 约束关联挖掘 单调约束 非单调性约束
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Optimal Controls of Nonlinear Evolution Inclusions withPseudomonotone Operator
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作者 张著洪 《Journal of Mathematical Research and Exposition》 CSCD 北大核心 2002年第2期229-237,共9页
In this paper, we study the optimal control problem of nonlinear differentialinclusions with principle operator being pseudomonotone. First, we give some propertiesof solutions of certain evolution equations. Further,... In this paper, we study the optimal control problem of nonlinear differentialinclusions with principle operator being pseudomonotone. First, we give some propertiesof solutions of certain evolution equations. Further, we prove the existence of admissibletrajectories for evolution inclusions. Then, we extend the Fillipov's selection theoremand discuss a general Lagrange type optimal control problem. Finally, we present anexample that demonstrates the appplicability of our results. 展开更多
关键词 evolution inclusion set-valued analysis pseudomonotone operator upper semicontinuity support function parabolic system.
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A NONMONOTONE FILTER LINE SEARCH TECHNIQUE FOR THE MBFGS METHOD IN UNCONSTRAINED OPTIMIZATION
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作者 WANG Zhujun ZHU Detong 《Journal of Systems Science & Complexity》 SCIE EI CSCD 2014年第3期565-580,共16页
This paper presents a new nonmonotone filter line search technique in association with the MBFGS method for solving unconstrained minimization.The filter method,which is traditionally used for constrained nonlinear pr... This paper presents a new nonmonotone filter line search technique in association with the MBFGS method for solving unconstrained minimization.The filter method,which is traditionally used for constrained nonlinear programming(NLP),is extended to solve unconstrained NLP by converting the latter to an equality constrained minimization.The nonmonotone idea is employed to the filter method so that the restoration phrase,a common feature of most filter methods,is not needed.The global convergence and fast local convergence rate of the proposed algorithm are established under some reasonable conditions.The results of numerical experiments indicate that the proposed method is efficient. 展开更多
关键词 CONVERGENCE filter method MBFGS method nonmonotone technique unconstrainedoptimization.
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