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博弈树中结点权值设定方法
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作者 韩海 《江汉大学学报》 2000年第3期27-29,共3页
博弈树的求解现在都依据结点的权值设定把问题简化.本文就权值设定问题提出一种实现方法,并证明在某些具体问题上能够降低问题求解的复杂度.
关键词 决策树 确定解 优先搜索 结点 权值设定
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现代汉语虚词模糊划分的隶属度量表 被引量:4
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作者 袁毓林 《汉语学报》 2005年第4期12-21,共10页
本文根据现代汉语各种虚词的典型成员的语法表现来选定一组分布特征,按照它们对于相关词类的重要性、根据经验给共中的每个特征设定权值;再用每类词的非典型成员的语法表现作校验,做成一套可用以对有关的虚词进行词类模糊划分和隶属度... 本文根据现代汉语各种虚词的典型成员的语法表现来选定一组分布特征,按照它们对于相关词类的重要性、根据经验给共中的每个特征设定权值;再用每类词的非典型成员的语法表现作校验,做成一套可用以对有关的虚词进行词类模糊划分和隶属度计算的量表。希望借此可以使得现代汉语中有关的虚词不仅能划归到某一个或几个词类之中(即词有定类),而且能显示出它从属于这一个或几个词类的程度到底有多大(即类中有别)。 展开更多
关键词 词类划分 典型成员 分布特征 权值设定 模糊分类 隶属度
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Performance enhancement of IMC-PID controller design for stable and unstable second-order time delay processes 被引量:2
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作者 Munna KUMAR Durga PRASAD Ram Sharan SINGH 《Journal of Central South University》 SCIE EI CAS CSCD 2020年第1期88-100,共13页
An IMC-PID controller was proposed for unstable second-order time delay system which shows the characteristics of inverse response(RHP zero). A plot of Ms versus λ was suggested to calculate the suitable tuning param... An IMC-PID controller was proposed for unstable second-order time delay system which shows the characteristics of inverse response(RHP zero). A plot of Ms versus λ was suggested to calculate the suitable tuning parameter λ, which provides a trade-off between performance and robustness. Six different forms of process models were selected from literature to show the applicability of the present method. Performance of controller was calculated by ITAE and total variation TV and compared with recently published tuning rules. Undesirable overshoot was removed by using a set-point weighting parameter. Robustness was tested by introducing a perturbation into the various model parameters and closed-loop results show that the designed controller is robust in the case of model uncertainty. The proposed method shows an overall better closed-loop response as compared to other recently reported methods. 展开更多
关键词 maximum sensitivity internal model control unstable process set-point weighting integral of time-weighted absolute error
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ON APPROXIMATION OF MAX n/2-UNCUT PROBLEM 被引量:1
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作者 XU Dachuan(Institute of Applied Mathematics, Academy of Mathematics and Systems Sciences, Chinese. Academy of Sciences, Beijing 100080, China) 《Journal of Systems Science & Complexity》 SCIE EI CSCD 2003年第2期260-267,共8页
Using outward rotations, we obtain an approximation algorithm for MAXn/2-UNCUT problem, i.e., partitioning the vertices of a weighted graph into two blocks of equalcardinality such that the total weight of edges that ... Using outward rotations, we obtain an approximation algorithm for MAXn/2-UNCUT problem, i.e., partitioning the vertices of a weighted graph into two blocks of equalcardinality such that the total weight of edges that do not cross the cut is maximized. In manyinteresting cases, the algorithm performs better than the algorithms of Ye and of Halperin andZwick. The main tool used to obtain this result is semidefinite programming. 展开更多
关键词 approximation algorithm MAX n/2-UXCUT problem semidefinite programming approximation ratio
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