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本文根据高温超导厚膜和薄膜场和电流的分布特点,给出厚膜和薄膜准TEM微带线电容等效电路及分电容表达式.这些表达式的正确性通过三个例子证实. 相似文献
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Jun Mao 《Frontiers of Physics》2018,13(4):138118
Two-dimensional (2D) MoS2 is used as a catalyst or support and has received increased research interest because of its superior structural and electronic properties compared with those of bulk structures. In this article, we illustrate the active sites of 2D MoS2 and various strategies for enhancing its intrinsic catalytic activity. The recent advances in the use of 2D MoS2-based materials for applications such as thermocatalysis, electrocatalysis, and photocatalysis are discussed. We also discuss the future opportunities and challenges for 2D MoS2-based materials, in both fundamental research and industrial applications. 相似文献
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Two-dimensional (2D) MoS2 is used as a catalyst or support and has received increased research interest because of its superior structural and electronic properties compared with those of bulk structures. In this article, we illustrate the active sites of 2D MoS2 and various strategies for enhancing its intrinsic catalytic activity. The recent advances in the use of 2D MoS2-based materials for applications such as thermocatalysis, electrocatalysis, and photocatalysis are discussed. We also discuss the future opportunities and challenges for 2D MoS2-based materials, in both fundamental research and industrial applications. 相似文献
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利用加权拉盖尔多项式-时域有限差分方法(WLP-FDTD)对高速电路中非均匀传输线进行瞬态分析和计算.根据传输线等效电路模型的电报方程,采用拉盖尔基函数展开电流电压表达式,并利用其正交性,避免了稳定约束条件进而得到方程的解.与传统的时域有限差分方法(FDTD)相比,提出的方法分离了时间和空间变量,不受稳定条件的约束,在对传输线离散段数较多时,具有较高的计算速率.仿真结果表明在传输线的分析中采用WLPFDTD比FDTD的效率更高,最后开发了基于WLP-FDTD多根传输线的仿真软件. 相似文献
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从宏观面与微观面研究海南某医院2012-2014年急诊患者就诊人数的统计建模,宏观面根据月,周数据建立时间序列模型,进行了相关预测,发现存在负的"一月效应"和负的"周二,周四效应",正的"周日效应".微观面根据日数据及分时段数据,研究就诊人数的概率分布,借助Box-Cox变换和Matlab软件编程,把非正态分布的序列变换成正态分布,估计其中的有关参数,确定密度函数,从而进行统计推断,给定显著性水平α(如α=0.05),在置信水平(如95%)下,得到患者在一日内及不同时段就诊人数的置信区间,为医院管理部门合理安排医护人员提供科学依据. 相似文献
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