The visualization operation of railway four-electric engineering construction is an important part in railway′s construction,which plays a critical role in improving operation efficiency and it is smoothly finished o...The visualization operation of railway four-electric engineering construction is an important part in railway′s construction,which plays a critical role in improving operation efficiency and it is smoothly finished on railway four-electric majors′professional construction.According to the typical high-speed railway project construction′s technology,these four-electric professional construction′s technology scheme are made into construction method′s video,according to the technology plan′s characteristics of professional,visualization and information,under the premise of improving the efficiency about professional project management and construction of the railway four-electric project,the critical technology problems of railway four-electric project are solved.At the same time,it also improves efficiency of BIM model′s construction,the cooperation management′s efficiency of construction process,and the ability of integrating model information.展开更多
为探讨机器学习方法在电子病历领域应用的研究现状、研究热点与前沿,以2000~2022年中国知网数据库和Web of Science核心合集数据库中关于机器学习在电子病历中应用的相关文献为数据来源,运用CiteSpace软件绘制国家/地区、作者、机构、...为探讨机器学习方法在电子病历领域应用的研究现状、研究热点与前沿,以2000~2022年中国知网数据库和Web of Science核心合集数据库中关于机器学习在电子病历中应用的相关文献为数据来源,运用CiteSpace软件绘制国家/地区、作者、机构、关键词共现以及关键词突现5个方面科学知识图谱进行可视化对比分析,以便了解国内外研究的差异,为该领域的研究和发展提供参考。展开更多
为了解决电磁感应式非接触电能传输(ICPT)系统输出电压的可控动态调节问题,提出一种基于LCL谐振变换器的动态调压控制方法。发射端采用具有恒流输出特性的LCL谐振结构,使得流过发射端耦合线圈的电流呈现恒流特性。在接收端LCL谐振变换...为了解决电磁感应式非接触电能传输(ICPT)系统输出电压的可控动态调节问题,提出一种基于LCL谐振变换器的动态调压控制方法。发射端采用具有恒流输出特性的LCL谐振结构,使得流过发射端耦合线圈的电流呈现恒流特性。在接收端LCL谐振变换器输出侧并联一个用于调节电能输出的可控开关管,通过控制开关管的开关状态,实现电能的可控输出。当开关管关断时,接收端LCL谐振变换器输出电能给负载,输出电压上升;当开关管开通时,负载侧电能输出被切断,输出电压下降。通过检测输出电压,对可控开关管进行负反馈控制,可以动态调节电能输出功率,实现输出电压的动态调节。该方法只调节接收端,无需使用无线信道与发射端通信,电路结构及控制方法较为简单、易于实现,且适用于一个发射端对多个接收端无线供电。最后,搭建了2k W ICPT系统原理样机。通过实验验证了所提方法的可行性和正确性。展开更多
文摘The visualization operation of railway four-electric engineering construction is an important part in railway′s construction,which plays a critical role in improving operation efficiency and it is smoothly finished on railway four-electric majors′professional construction.According to the typical high-speed railway project construction′s technology,these four-electric professional construction′s technology scheme are made into construction method′s video,according to the technology plan′s characteristics of professional,visualization and information,under the premise of improving the efficiency about professional project management and construction of the railway four-electric project,the critical technology problems of railway four-electric project are solved.At the same time,it also improves efficiency of BIM model′s construction,the cooperation management′s efficiency of construction process,and the ability of integrating model information.
文摘为探讨机器学习方法在电子病历领域应用的研究现状、研究热点与前沿,以2000~2022年中国知网数据库和Web of Science核心合集数据库中关于机器学习在电子病历中应用的相关文献为数据来源,运用CiteSpace软件绘制国家/地区、作者、机构、关键词共现以及关键词突现5个方面科学知识图谱进行可视化对比分析,以便了解国内外研究的差异,为该领域的研究和发展提供参考。
文摘为了解决电磁感应式非接触电能传输(ICPT)系统输出电压的可控动态调节问题,提出一种基于LCL谐振变换器的动态调压控制方法。发射端采用具有恒流输出特性的LCL谐振结构,使得流过发射端耦合线圈的电流呈现恒流特性。在接收端LCL谐振变换器输出侧并联一个用于调节电能输出的可控开关管,通过控制开关管的开关状态,实现电能的可控输出。当开关管关断时,接收端LCL谐振变换器输出电能给负载,输出电压上升;当开关管开通时,负载侧电能输出被切断,输出电压下降。通过检测输出电压,对可控开关管进行负反馈控制,可以动态调节电能输出功率,实现输出电压的动态调节。该方法只调节接收端,无需使用无线信道与发射端通信,电路结构及控制方法较为简单、易于实现,且适用于一个发射端对多个接收端无线供电。最后,搭建了2k W ICPT系统原理样机。通过实验验证了所提方法的可行性和正确性。