共查询到18条相似文献,搜索用时 93 毫秒
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为了描述在不同时刻内涵发生变化的模糊集合, 本文通过综合模糊集合、语言动力系统(Linguistic dynamic systems,LDS) 及动态规划, 提出了时变论域与动态模糊规则理论, 将时变论域分为离散型与连续型两类, 每一类分为递增型、递减型及波动型三种, 并讨论如何在时变论域上建立动态模糊规则以及进行词计算, 最后给出时变论域下的语言动力学轨迹. 相似文献
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为了解决多人对事物的多因素动态评估问题,提出区间二型模糊综合评判下的语言动力学分析方法,给出半连通区间二型模糊集合的表述与运算.综合二型模糊集合与模糊综合评判,探讨二型模糊综合评判方法.结合不同时段的数据,形成多因素动态评估的语言动力学轨迹.最后将区间二型模糊综合评判下的语言动力学系统应用于旅游景区的动态评估中. 相似文献
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网络化控制的出现,大大推动了现代控制技术的发展,正成为新的研究热点。针对网络化控制系统,提出了一种新型的延迟状态变量模型,以此为基础设计了线行二次型最优控制器(LQR)。同时也给出了在线估计延迟的方法。因为在具有时变延迟的网络化控制系统中,LQR控制器很难实施,又给出了一种模糊逻辑-LQR控制器的设计方法。实验控制结果表明,这种新型控制器使时变延迟的网络化控制系统稳定,且具有很好的性能鲁棒。 相似文献
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针对交叉路口信号控制面临的多目标优化问题,建立以延误时间、停车次数和通行能力作为性能指标的交叉路口信号配时模型,提出一种基于多种群的改进蚁群算法,对信号配时方案进行优化。改进的算法以交叉路口的平峰状态和高峰状态进行仿真。实验结果表明利用该算法对模型求解的结果优于传统方法,能降低交叉口的总延误时间和停车次数,提高了通行能力。且该算法稳定性好,求解速度快。 相似文献
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一一映射下区间二型模糊集合的语言动力学轨迹 总被引:1,自引:0,他引:1
给出区间二型模糊扩展原理,并将常规的一一映射抽象成与之对应的区间二型模糊映射。介绍基于区间二型模糊扩展原理的词计算方法。最后分析区间二型模糊集合的语言动力学轨迹。 相似文献
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Chengdong Li Jianqiang Yi Yisheng Lv Peiyong Duan 《IEEE/CAA Journal of Automatica Sinica》2019,6(6):1487-1498
In lots of data based prediction or modeling applications, uncertainties and/or noises in the observed data cannot be avoided. In such cases, it is more preferable and reasonable to provide linguistic (fuzzy) predicted results described by fuzzy memberships or fuzzy sets instead of the crisp estimates depicted by numbers. Linguistic dynamic system (LDS) provides a powerful tool for yielding linguistic (fuzzy) results. However, it is still difficult to construct LDS models from observed data. To solve this issue, this paper first presents a simplified LDS whose inputoutput mapping can be determined by closed-form formulas. Then, a hybrid learning method is proposed to construct the data-driven LDS model. The proposed hybrid learning method firstly generates fuzzy rules by the subtractive clustering method, then carries out further optimization of centers of the consequent triangular fuzzy sets in the fuzzy rules, and finally adopts multiobjective optimization algorithm to determine the left and right end-points of the consequent triangular fuzzy sets. The proposed approach is successfully applied to three real-world prediction applications which are: prediction of energy consumption of a building, forecasting of the traffic flow, and prediction of the wind speed. Simulation results show that the uncertainties in the data can be effectively captured by the linguistic (fuzzy) estimates. It can also be extended to some other prediction or modeling problems, in which observed data have high levels of uncertainties. 相似文献
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Linguistic Dynamic Modeling and Analysis of Psychological Health State Using Interval Type-2 Fuzzy Sets 下载免费PDF全文
The study of psychological health state is helpful to build appropriate models and take effective intervention strategies, and the results benefit the intervened released from psychological distress within the shortest possible time. In this paper, interval type-2 fuzzy sets and fuzzy comprehension evaluation are applied in the analysis of mental health status and crisis intervention. A closed-loop linguistic dynamic intervention model for psychological health state is built. Linguistic dynamic systems based on interval type-2 fuzzy sets are used to describe and analyze the evolutionary process of psychological health status. 相似文献
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The linguistic dynamic systems (LDSs) based on type-1 fuzzy sets can provide a powerful tool for modeling, analysis, evaluation and control of complex systems. However, as pointed out in earlier studie... 相似文献
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软件Agent的关键问题是如何促进Agent学习,怎样更好地管理Agent,以及如何有效地用它开发软件,基于此,提出了一个基于动态模糊逻辑的软件Agent生命周期模型。模型主要分3个阶段来描述:定义阶段,开发阶段和维护阶段。同时通过示例说明了利用此模型来揭示自动协作系统是十分有效的。 相似文献
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张涛 《计算机测量与控制》2014,22(12)
以解析GPS的时间信息和位置信息为目标,通过使用嵌入式GPS模块和AVR控制器,设计和制作GPS授时与定位装置,实现时间信息和位置信息的解析和显示等问题;首先给出了基于GPS模块和AVR控制器的授时与定位装置的整体构架,然后对各个部分的硬件进行详细设计,给出了硬件设计电路和软件设计框图;最后对所设计的基于GPS模块和AVR控制器的授时与定位装置进行实物制作,证明了设计内容的正确性和可行性,具有一定的实际应用价值。 相似文献