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基于Modelica的MEMS系统级多领域建模与仿真 被引量:2
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作者 胡伟 魏昕 谢小柱 《传感技术学报》 CAS CSCD 北大核心 2009年第10期1413-1416,共4页
分析了现有的MEMS系统级建模与仿真方法,讨论了运用Modelica语言进行面向对象的非因果关系建模方法,建立了基于Modelica的电容式微型静电致动器系统级模型,仿真结果证明了Modelica用于MEMS系统级多领域仿真的可行性。
关键词 Modelica多领域仿真 面向对象 非因果关系模型 微型静电致动器
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基于Modelica/Dymola的微谐振器建模与仿真 被引量:2
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作者 胡伟 魏昕 谢小柱 《计算机仿真》 CSCD 北大核心 2010年第10期79-82,共4页
针对MEMS的多领域耦合和系统级的快速建模与仿真要求,提出研究关于微型梳状静电谐振器建模与仿真方法。为提高系统的稳定性,减少误差,采用了基于Modelica/Dymola的非因果关系建模方法及流程,以梳状谐振器机电耦合模型的自然形式方程为基... 针对MEMS的多领域耦合和系统级的快速建模与仿真要求,提出研究关于微型梳状静电谐振器建模与仿真方法。为提高系统的稳定性,减少误差,采用了基于Modelica/Dymola的非因果关系建模方法及流程,以梳状谐振器机电耦合模型的自然形式方程为基础,以Modelica语言建立非因果关系的仿真模型,借助于Dymola平台对振子的位移/速度曲线进行仿真。仿真结果与理论验证相符,表明Modelica具有建模过程简单、建模速度快和仿真精度高等优点,适合于MEMS多领域建模与仿真研究。 展开更多
关键词 微型梳状静电谐振器 非因果关系模型 建模 仿真
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Nonlinear correlation between RMB internationalization and nonferrous metal prices 被引量:1
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作者 Xue-hong ZHU Zi-tao ZHANG +1 位作者 Hong-wei ZHANG Qiu-fen WANG 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2020年第7期1991-2000,共10页
The correlation between Renminbi(RMB) internationalization and nonferrous metal prices was studied using the nonlinear Granger causality test and the dynamic conditional correlation-generalized autoregressive conditio... The correlation between Renminbi(RMB) internationalization and nonferrous metal prices was studied using the nonlinear Granger causality test and the dynamic conditional correlation-generalized autoregressive conditional heteroskedastic(DCC-GARCH) model. The results indicate that the relationship between RMB internationalization and nonferrous metal prices reflects a complex nonlinear mechanism. There was no mutual influence between RMB internationalization and nonferrous metal prices prior to the trials of the RMB settlement in the cross-border trade in July 2009. Since then, however, a bidirectional causal relationship between RMB internationalization and the price of copper and a unidirectional causal relationship from the price of aluminum to RMB internationalization were examined. In addition, due to the impact of extreme events, such as economic and financial crises, RMB internationalization and nonferrous metal prices are not always positively correlated but are rather occasionally negatively correlated. 展开更多
关键词 RMB internationalization nonferrous metals nonlinear Granger causality test DCC-GARCH model
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