以2013年版JCR中影响因子大于1的16种医学信息相关期刊为研究对象,在Web of Science中检索2010-2014年医学信息系统相关文献,然后对高频关键词进行了社会网络分析和共词分析,发现医学信息系统的研究热点主要有医学信息系统的实施效果评...以2013年版JCR中影响因子大于1的16种医学信息相关期刊为研究对象,在Web of Science中检索2010-2014年医学信息系统相关文献,然后对高频关键词进行了社会网络分析和共词分析,发现医学信息系统的研究热点主要有医学信息系统的实施效果评估、医学信息系统用户接受行为研究、医学数据挖掘方法及其应用研究、医学信息系统在医学领域的应用与开发、决策支持系统在医疗领域中的应用研究等5个方面,并指出电子健康档案、医学信息系统的管理、新兴信息技术在医学信息系统领域的应用在未来几年仍是研究的热点主题。展开更多
提出1种描述微控制器直接功率注入(direct power injection,DPI)测量电磁传导抗扰度特性的模型.该模型在国际已有模型的基础上,在PDN模块中增加了内核网络、PLL,A/D网络等模型,能更精确的反映PDN的物理情况,同时能实现集成电路电磁兼容...提出1种描述微控制器直接功率注入(direct power injection,DPI)测量电磁传导抗扰度特性的模型.该模型在国际已有模型的基础上,在PDN模块中增加了内核网络、PLL,A/D网络等模型,能更精确的反映PDN的物理情况,同时能实现集成电路电磁兼容模型的标准化建模.最后,在不同频率的射频电磁干扰下对微控制器被测I/O端口抗扰度进行仿真分析,并与测量结果对比,结果表明在500 MHz以下,模型预测抗扰度的不确定度在允许范围内.该模型应用于PCB级别,可精确仿真PCB板的电磁兼容情况,仿真精度远高于使用IBIS模型.展开更多
To promote the modeling standardization process of the integrated circuits, an improved electrical simulation model for a direct power injection （DPI） setup which was used to measure the conducted immunity of a 16-b...To promote the modeling standardization process of the integrated circuits, an improved electrical simulation model for a direct power injection （DPI） setup which was used to measure the conducted immunity of a 16-bit microcontroller to radio frequency aggression was investigated. Based on the existing model of the same microcontroller, the PDN module was modified by adding the core, PLL and MD network models, which could reflect the actual electric distribution situation within the microcontroller more accurately. By comparing the simulation results with the measurement results, the effectiveness of the modified model can be improved to 500 MHz, and its uncertainty is within ＋1.8 dB （＋2 dB is acceptable）. Then, to improve the simulation accuracy of the complete model in the high frequency range, the I/O model which contained the dynamic and nonlinear characteristics reflecting the variation of the internal impedance of the microcontroller with increasing the frequency of the external noise was introduced. By comparing the simulation results with the measurement results, the effectiveness of the second modified model can be improved up to 1.4 GHz with the uncertainty of ~1.8 dB. Thus, a conclusion can be reached that the proposed model can be applied to a much wider frequency range with a smaller uncertainty than the latest model of the similar type. Furthermore, associated with the electromagnetic emission testing platform model, the PDN module can also be used to predict the electromagnetic conducted and radiated emission characteristics. This modeling method can also be applied to other integrated circuits, which is very helpful to the standardization of the IC electromagnetic compatibility （EMC） modeling process.展开更多
文摘以2013年版JCR中影响因子大于1的16种医学信息相关期刊为研究对象,在Web of Science中检索2010-2014年医学信息系统相关文献,然后对高频关键词进行了社会网络分析和共词分析,发现医学信息系统的研究热点主要有医学信息系统的实施效果评估、医学信息系统用户接受行为研究、医学数据挖掘方法及其应用研究、医学信息系统在医学领域的应用与开发、决策支持系统在医疗领域中的应用研究等5个方面,并指出电子健康档案、医学信息系统的管理、新兴信息技术在医学信息系统领域的应用在未来几年仍是研究的热点主题。
文摘提出1种描述微控制器直接功率注入(direct power injection,DPI)测量电磁传导抗扰度特性的模型.该模型在国际已有模型的基础上,在PDN模块中增加了内核网络、PLL,A/D网络等模型,能更精确的反映PDN的物理情况,同时能实现集成电路电磁兼容模型的标准化建模.最后,在不同频率的射频电磁干扰下对微控制器被测I/O端口抗扰度进行仿真分析,并与测量结果对比,结果表明在500 MHz以下,模型预测抗扰度的不确定度在允许范围内.该模型应用于PCB级别,可精确仿真PCB板的电磁兼容情况,仿真精度远高于使用IBIS模型.
基金Project(2007dfa71250) supported by the International Science and Technology Cooperative Program of ChinaProject(20062250) supported by the Doctor Fund of North China Electric Power University, China
文摘To promote the modeling standardization process of the integrated circuits, an improved electrical simulation model for a direct power injection （DPI） setup which was used to measure the conducted immunity of a 16-bit microcontroller to radio frequency aggression was investigated. Based on the existing model of the same microcontroller, the PDN module was modified by adding the core, PLL and MD network models, which could reflect the actual electric distribution situation within the microcontroller more accurately. By comparing the simulation results with the measurement results, the effectiveness of the modified model can be improved to 500 MHz, and its uncertainty is within ＋1.8 dB （＋2 dB is acceptable）. Then, to improve the simulation accuracy of the complete model in the high frequency range, the I/O model which contained the dynamic and nonlinear characteristics reflecting the variation of the internal impedance of the microcontroller with increasing the frequency of the external noise was introduced. By comparing the simulation results with the measurement results, the effectiveness of the second modified model can be improved up to 1.4 GHz with the uncertainty of ~1.8 dB. Thus, a conclusion can be reached that the proposed model can be applied to a much wider frequency range with a smaller uncertainty than the latest model of the similar type. Furthermore, associated with the electromagnetic emission testing platform model, the PDN module can also be used to predict the electromagnetic conducted and radiated emission characteristics. This modeling method can also be applied to other integrated circuits, which is very helpful to the standardization of the IC electromagnetic compatibility （EMC） modeling process.
