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基于键合图理论的故障诊断方法及在锅炉给水泵上的应用 被引量:10
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作者 韩晓娟 杨锡运 +2 位作者 刘东明 徐大平 柳亦兵 《中国电机工程学报》 EI CSCD 北大核心 2007年第23期75-79,共5页
利用键合图模型知识表达方式,可创建系统设备之间的复杂因果推理关系,从而生成故障树,进行系统的故障诊断。文中以锅炉给水泵为对象,提出一种基于键合图理论的定性故障诊断方法。在介绍故障树和键合图基本理论后,提出利用键合图生成故... 利用键合图模型知识表达方式,可创建系统设备之间的复杂因果推理关系,从而生成故障树,进行系统的故障诊断。文中以锅炉给水泵为对象,提出一种基于键合图理论的定性故障诊断方法。在介绍故障树和键合图基本理论后,提出利用键合图生成故障树的概念,然后通过给水泵系统的键合图模型,给出了基于倒置因果分析方法的给水泵故障树,并为因果树中元素分配了定性值,利用故障树边界层元素的定性值分析法,定位出引起给水泵初始故障集的故障源。此方法具有定性故障诊断的优点,通过给水泵动态特性的仿真结果验证了该方法的正确性。 展开更多
关键词 键合图模型 故障诊断 故障树 因和果 给水泵
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Imitations of Beings Enter and Exit: Plotinus on Incorporeal Matter in Plato: Ⅲ 6[26] 11-15 被引量:1
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作者 Gary M. Gurtler, S.J. 《Journal of Philosophy Study》 2013年第2期123-130,共8页
Plotinus' account of matter in Ennead III 6[26] 11-15 serves two purposes. The terms, evil and ugly, present the negative side of matter's causality, providing for the change characteristic of the sensible world and... Plotinus' account of matter in Ennead III 6[26] 11-15 serves two purposes. The terms, evil and ugly, present the negative side of matter's causality, providing for the change characteristic of the sensible world and the possibility of ontological evil and privation as well as of moral evil among human beings. The receptacle and other images from Plato's Timaeus present the positive side of this causality, matter as allowing for the presence of forms in the bodies of the sensible world. Plotinus explicitly articulates the linguistic problem surrounding the nature of matter, since language is derived from the corporeal and thus needs constant correction when applied to matter as incorporeal. His use of language, thus, always has two phases, first, capturing the nature of matter as aptly as possible, and second, highlighting the difference between matter and the image, analogy, or metaphor used to help explain it. 展开更多
关键词 MATTER EVIL RECEPTACLE chora form good APPEARANCE Timaeus
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The Relationship between Carbon Dioxide Emission Intensity and Economic Growth in China:Cointegration,Linear and Nonlinear Granger Causality 被引量:1
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作者 涂雄苓 《Journal of Resources and Ecology》 CSCD 2016年第2期122-129,共8页
This study is to use cointegration, linear and non-linear Granger causality test to investigate the relationship between carbon dioxide (CO2) emissionand economic growth (GDP) in China for the period 1961-2010. Ou... This study is to use cointegration, linear and non-linear Granger causality test to investigate the relationship between carbon dioxide (CO2) emissionand economic growth (GDP) in China for the period 1961-2010. Our analysis shows that CO2 emission and GDP are balanced in the long-run. The results suggest that there is evidence that economic development can improve environmental degradation in the long-run. Moreover, the result of linear and non-linear Granger causality test indicates a long-run unidirectional causality running from GDP to CO2 emissions. The study suggests that in the long run, economic growth may have an adverse effect on the CO2 emissions in China. Government should take into account the environment in their current policies, which may be of great importance for policy decision-makers to develop economic policies to preserve economic growth while curbing of carbon emissions. 展开更多
关键词 COINTEGRATION Linear and Nonlinear Granger Causality CO2 emission economic growth
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