A new analytical potential energy function for diatomic molecular ion XY+ is proposed based on the energy consistent method (ECM). The Coulomb potential included in the new ionic potential contains multipole correctio...A new analytical potential energy function for diatomic molecular ion XY+ is proposed based on the energy consistent method (ECM). The Coulomb potential included in the new ionic potential contains multipole corrections, converges quickly and is variationally, changeable. The new potential and the ECM are applied to variationally studying the potential energies of eight electronic states of several diatomic molecular ions: the A2π state of CO+, the X2∑ g + state of Li 2 + , the X2∑ g + state of He 2 + , the 12∏u state of Na 2 + , the A2∏u state of N 2 + , the X1∑+ state of KrH+, the X2∑+ state of SiO+ and the A2π state of SO+ ion. The present results agree excellently with the experiment-based Rydberg-Klein-Rees (RKR) potentials, and are superior to the commonly used Huxley-Murrell-Sorbie (HMS) analytical potentials, and are better in some cases than some quantum mechanicalab initio potentials in the ionic asymptotic and dissociation regions.展开更多
利用联合国贸发数据库中2000—2018年的信息通信技术(Information and Communication Technology,ICT)贸易数据,采用二元和加权2个方法构建世界制造设备和电子元件出口贸易网络,在综合分析ICT贸易网络结构特征的基础上,采用QAP方法对IC...利用联合国贸发数据库中2000—2018年的信息通信技术(Information and Communication Technology,ICT)贸易数据,采用二元和加权2个方法构建世界制造设备和电子元件出口贸易网络,在综合分析ICT贸易网络结构特征的基础上,采用QAP方法对ICT出口贸易网络进行结构演化解释。结果表明:①制造设备和电子元件出口贸易的网络密度很高,世界各国(地区)ICT贸易关系密切;②中国成为制造设备出口贸易网络的核心节点,发达经济体依旧占据主要市场;电子元件出口贸易网络中存在投资带动发展以及“抱团”现象,中国的电子元件在出口贸易网络中也占据着重要地位;③多维距离因素能够解释制造设备和电子元件出口贸易网络的结构变化的18%和15%。这一结论为中国ICT产业参与全球贸易制定相关政策提供依据。展开更多
PDCA(Plan Do Check Action)循环作为一套科学的办事程序,适用于电子设备的可靠性设计。阐述了PDCA循环的内涵,按照PDCA循环的控制、管理模式,详细讨论了电子设备可靠性设计的相关问题,包括可靠性策划、可靠性分析计算、可靠性设计、可...PDCA(Plan Do Check Action)循环作为一套科学的办事程序,适用于电子设备的可靠性设计。阐述了PDCA循环的内涵,按照PDCA循环的控制、管理模式,详细讨论了电子设备可靠性设计的相关问题,包括可靠性策划、可靠性分析计算、可靠性设计、可靠性检查、可靠性处置等。实践证明,基于PDCA循环的可靠性设计可确保影响设备可靠性的任何一项活动都能得到有效控制,切实提高设备的可靠性水平。展开更多
基金supported by the National Natural Science Foundation of China(Grant No.10074048)the Science Foundation of the Ministry of Education of China.
文摘A new analytical potential energy function for diatomic molecular ion XY+ is proposed based on the energy consistent method (ECM). The Coulomb potential included in the new ionic potential contains multipole corrections, converges quickly and is variationally, changeable. The new potential and the ECM are applied to variationally studying the potential energies of eight electronic states of several diatomic molecular ions: the A2π state of CO+, the X2∑ g + state of Li 2 + , the X2∑ g + state of He 2 + , the 12∏u state of Na 2 + , the A2∏u state of N 2 + , the X1∑+ state of KrH+, the X2∑+ state of SiO+ and the A2π state of SO+ ion. The present results agree excellently with the experiment-based Rydberg-Klein-Rees (RKR) potentials, and are superior to the commonly used Huxley-Murrell-Sorbie (HMS) analytical potentials, and are better in some cases than some quantum mechanicalab initio potentials in the ionic asymptotic and dissociation regions.
文摘利用联合国贸发数据库中2000—2018年的信息通信技术(Information and Communication Technology,ICT)贸易数据,采用二元和加权2个方法构建世界制造设备和电子元件出口贸易网络,在综合分析ICT贸易网络结构特征的基础上,采用QAP方法对ICT出口贸易网络进行结构演化解释。结果表明:①制造设备和电子元件出口贸易的网络密度很高,世界各国(地区)ICT贸易关系密切;②中国成为制造设备出口贸易网络的核心节点,发达经济体依旧占据主要市场;电子元件出口贸易网络中存在投资带动发展以及“抱团”现象,中国的电子元件在出口贸易网络中也占据着重要地位;③多维距离因素能够解释制造设备和电子元件出口贸易网络的结构变化的18%和15%。这一结论为中国ICT产业参与全球贸易制定相关政策提供依据。
文摘PDCA(Plan Do Check Action)循环作为一套科学的办事程序,适用于电子设备的可靠性设计。阐述了PDCA循环的内涵,按照PDCA循环的控制、管理模式,详细讨论了电子设备可靠性设计的相关问题,包括可靠性策划、可靠性分析计算、可靠性设计、可靠性检查、可靠性处置等。实践证明,基于PDCA循环的可靠性设计可确保影响设备可靠性的任何一项活动都能得到有效控制,切实提高设备的可靠性水平。
