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DOI:
Journal of Software:2010.21(zk):310-317

一种用于上下文推理的带反馈的自适应模糊Petri 网模型
文赛平,朱珍民,叶剑
(中国科学院 计算技术研究所,北京 100090)
A Feedback Adaptive Fuzzy Petri Net Model for Context Reasoning
WEN Sai-Ping,ZHU Zhen-Min,YE Jian
(Institute of Computing Technology, The Chinese Academy of Sciences, Beijing 100190, China)
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Received:July 01, 2010    Revised:December 10, 2010
> 中文摘要: 自适应模糊Petri 网兼具模糊Petri 网的模糊推理能力和神经网络的学习能力,是普适计算的模糊情境推理机制的重要的形式化规约工具.但该模型依赖于离线训练数据集,无法适应动态变化的普适智能环境.在自适应学习Petri 网模型中嵌入反馈机制,并对将模糊逻辑引入对上下文的表示,利用神经网络的反向传播学习方法对隶属度函数的参数进行学习,提高了模型的场景适配和个性化自学习能力.通过设计服务推荐系统,建立了模型仿真与验证实验环境.实验结果表明,该方法可以有效提高系统学习能力,进而提高推理正确率.
Abstract:As an improved model of fuzzy Petri net, adaptive Petri net (AFPN) has got the learning ability from neural network. But AFPN still depends on offline training data, while actual environment is so complex, vague and changeful that AFPN seems slightly inadequate. This paper proposes an approach based on fuzzy logic and feedback theory to improve AFPN. The approach introduces feedback mechanisms into AFPN to enhance the adaptive ability in dynamic environment. In addition, the approach embeds fuzzy logic theory into the representation of context information. Thus, the uncertain context information management is more conformable with person’s sense. The approach is also able to learn the parameters of membership function by using the back propagation algorithm of neural network. At the end of the paper, an experiment is designed to demonstrate that the approach is feasible and effective in fuzzy reasoning.
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基金项目:Supported by the National High-Tech Research and Development Plan of China under Grant No.2009AA011902 (国家高技术研究发展计划(863)); the National Natural Science Foundation of China under Grant No.61070109 (国家自然科学基金) Supported by the National High-Tech Research and Development Plan of China under Grant No.2009AA011902 (国家高技术研究发展计划(863)); the National Natural Science Foundation of China under Grant No.61070109 (国家自然科学基金)
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文赛平,朱珍民,叶剑.一种用于上下文推理的带反馈的自适应模糊Petri 网模型.软件学报,2010,21(zk):310-317

WEN Sai-Ping,ZHU Zhen-Min,YE Jian.A Feedback Adaptive Fuzzy Petri Net Model for Context Reasoning.Journal of Software,2010,21(zk):310-317