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基于改进型可信度理论的凝汽器故障诊断模型研究 被引量:1
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作者 曹顺安 王露 胡家元 《工业仪表与自动化装置》 2010年第2期6-11,共6页
针对凝汽器故障及征兆间存在着的模糊关系及现有凝汽器故障诊断模型存在的不足,研究并设计了一个基于可信度理论的故障诊断模型,将可信度推理处理不确定关系的优点应用于凝汽器故障诊断之中。通过对征兆的表达、不确定算法的构建、可信... 针对凝汽器故障及征兆间存在着的模糊关系及现有凝汽器故障诊断模型存在的不足,研究并设计了一个基于可信度理论的故障诊断模型,将可信度推理处理不确定关系的优点应用于凝汽器故障诊断之中。通过对征兆的表达、不确定算法的构建、可信度传递等问题的描述探讨,提出了更为合理的征兆表达方式及转换数学方程,为征兆的准确获取提供了依据;同时改进了规则可信度的设定方法,使可信度推理更接近于人类专家思维。实例证明,该模型能很好地适应凝汽器故障诊断的需要。 展开更多
关键词 凝汽器 可信度理论 故障诊断 征兆表达 转换数学方程 规则可信度
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Covariant Prolongation Structure of Konno-Asai-Kakuhata Equation 被引量:2
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作者 XIE Tao LI Min-Li 《Communications in Theoretical Physics》 SCIE CAS CSCD 2008年第9期565-567,共3页
Based upon the covariant prolongation structures theory, we construct the sl(2, R)×R(p) prolongation structure for Konno-Asai-Kakuhata equation. By taking two and one-dimensional prolongation spaces, we obtai... Based upon the covariant prolongation structures theory, we construct the sl(2, R)×R(p) prolongation structure for Konno-Asai-Kakuhata equation. By taking two and one-dimensional prolongation spaces, we obtain the inverse scattering equations given by Konno et al. and the corresponding Riccati equation. The Baecklund transformations are also presented. 展开更多
关键词 integrable equation covariant prolongation structure Baecklund transformation
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Negatons, Positons, and Complexiton Solutions of Higher Order for a Non-isospectral KdV Equation
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作者 ZHANG Yuan-Yuan WANG Qi ZHANG Hong-Qing 《Communications in Theoretical Physics》 SCIE CAS CSCD 2007年第3X期411-414,共4页
In this paper, negatons, positons, and complexiton solutions of higher order for a non-isospectral KdV equation, the KdV equation with loss and non-uniformity terms are obtained through the bilinear Baicklund transfor... In this paper, negatons, positons, and complexiton solutions of higher order for a non-isospectral KdV equation, the KdV equation with loss and non-uniformity terms are obtained through the bilinear Baicklund transformation. Further, the properties of some solutions are shown by some figures made by using Maple. 展开更多
关键词 bilinear Backlund transformation negatons positons complexiton solutions
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Study on the Photovoltaic System with MPT and Supercapacitors 被引量:2
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作者 Jan Leuchter Pavel Bauer Vladimir Rerucha 《Journal of Energy and Power Engineering》 2012年第1期132-139,共8页
The paper makes survey of operating principle of power management of photovoltaic system with supercapacitors and a maximum power tracker (MPT) control to achieve the maximum efficiency. Supercapacitors are well sui... The paper makes survey of operating principle of power management of photovoltaic system with supercapacitors and a maximum power tracker (MPT) control to achieve the maximum efficiency. Supercapacitors are well suited to replace classical batteries and conventional capacitors in photovoltaic applications to improve a dynamic behaviors and life-time. It describes the advantages of a supercapacitors solution and shows the results of comparison with convenient batteries. The paper presents different topologies of basic photovoltaic concepts with dc-dc converters and supercapacitors according to the power dimension. The mathematical equations describing the photovoltaic cells, temperature analyses and mathematical solution of MPT are shown in the paper and supported by measurements. The mathematical models were applied in the design of 50 W and 6 kW photovoltaic sources with MPT and supercapacitors. Both models were verified using experimental measurements on the photovoltaic setup. 展开更多
关键词 Maximum power tracker photovoltaic system SUPERCAPACITOR dc-dc converters.
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