传统的能量路由器能量管理策略未考虑多台设备之间的柔性互联关系,且在港口应用中港机负荷的冲击性和新能源发电的波动性,使区域电网的可靠供电和经济运行面临挑战。为此,基于模糊逻辑控制提出了一种适用于集群式岸电能量路由器的供能...传统的能量路由器能量管理策略未考虑多台设备之间的柔性互联关系,且在港口应用中港机负荷的冲击性和新能源发电的波动性,使区域电网的可靠供电和经济运行面临挑战。为此,基于模糊逻辑控制提出了一种适用于集群式岸电能量路由器的供能精细化就地管控策略。该方法考虑了互联岸电能量路由器之间输出功率的耦合影响,并依据并网模式下可能的功率流向制定了保证电力用户经济效益的模糊控制规则,使储能输出电流根据电池荷电状态(state of charge, SOC)、电网电价以及各台岸电能量路由器净输出功率的变化进行动态调整。该方法计及了互联系统间的协同作用,构建了互联系统间各端口传输功率关系,有利于分布式能源跨台区协同消纳,且不需要上层调度控制,减少了对通信的依赖。仿真结果验证了所提控制策略的有效性和可行性。展开更多
基于医学影像学住院医师规范化培训的教学特点及培训学员构成的复杂性,针对目前医学图像存储与传输系统(picture archiving and communication system,PACS)病例库系统及网络多媒体建设应用在住培教学中所面临的问题,文章主要讨论了PAC...基于医学影像学住院医师规范化培训的教学特点及培训学员构成的复杂性,针对目前医学图像存储与传输系统(picture archiving and communication system,PACS)病例库系统及网络多媒体建设应用在住培教学中所面临的问题,文章主要讨论了PACS病例库及网络多媒体开发建设在医学影像住培与教学中的应用。文章重点介绍了PACS病例库、网络多媒体开发建设和案例教学法在医学影像规范化培训教学过程中的优势,同时,文章也对如何完善PACS病例库联合网络多媒体案例教学法对住院医师规范化培训的考核评价体系进行了详细讨论。此外,在前人研究的基础上提出了如何进一步解决目前PACS病例库系统及网络多媒体建设所面临的问题的方法,对医学影像学住培教学中所面临的现实问题有一定指导价值。展开更多
Bipolar junction transistors(BJTs) are often used in spacecraft due to their excellent working characteristics. However,the complex space radiation environment induces primary knock-on atoms(PKAs) in BJTs through coll...Bipolar junction transistors(BJTs) are often used in spacecraft due to their excellent working characteristics. However,the complex space radiation environment induces primary knock-on atoms(PKAs) in BJTs through collisions, resulting in hard-to-recover displacement damage and affecting the performance of electronic components. In this paper, the properties of PKAs induced by typical space heavy ions(C, N, O, Fe) in BJTs are investigated using Monte Carlo simulations. The simulated results show that the energy spectrum of ion-induced PKAs is primarily concentrated in the low-energy range(17eV–100eV) and displays similar features across all tested ions. The PKAs induced by the collision of energetic ions have large forward scattering angles, mainly around 88°. Moreover, the distribution of PKAs within a transistor as a function of depth displays a peak characteristic, and the peak position is linearly proportional to the incident energy at a certain energy range. These simulation outcomes serve as crucial theoretical support for long-term semiconductor material defect evolution and ground testing of semiconductor devices.展开更多
文摘传统的能量路由器能量管理策略未考虑多台设备之间的柔性互联关系,且在港口应用中港机负荷的冲击性和新能源发电的波动性,使区域电网的可靠供电和经济运行面临挑战。为此,基于模糊逻辑控制提出了一种适用于集群式岸电能量路由器的供能精细化就地管控策略。该方法考虑了互联岸电能量路由器之间输出功率的耦合影响,并依据并网模式下可能的功率流向制定了保证电力用户经济效益的模糊控制规则,使储能输出电流根据电池荷电状态(state of charge, SOC)、电网电价以及各台岸电能量路由器净输出功率的变化进行动态调整。该方法计及了互联系统间的协同作用,构建了互联系统间各端口传输功率关系,有利于分布式能源跨台区协同消纳,且不需要上层调度控制,减少了对通信的依赖。仿真结果验证了所提控制策略的有效性和可行性。
文摘基于医学影像学住院医师规范化培训的教学特点及培训学员构成的复杂性,针对目前医学图像存储与传输系统(picture archiving and communication system,PACS)病例库系统及网络多媒体建设应用在住培教学中所面临的问题,文章主要讨论了PACS病例库及网络多媒体开发建设在医学影像住培与教学中的应用。文章重点介绍了PACS病例库、网络多媒体开发建设和案例教学法在医学影像规范化培训教学过程中的优势,同时,文章也对如何完善PACS病例库联合网络多媒体案例教学法对住院医师规范化培训的考核评价体系进行了详细讨论。此外,在前人研究的基础上提出了如何进一步解决目前PACS病例库系统及网络多媒体建设所面临的问题的方法,对医学影像学住培教学中所面临的现实问题有一定指导价值。
基金Project supported by the National Natural Science Foundation of China (Grant Nos.11974091,51973046,U22B2044,and 21673025)the Open Projects of State Key Laboratory of Intense Pulsed Radiation Simulation and Effect (Grant No.SKLIPR2020)。
文摘Bipolar junction transistors(BJTs) are often used in spacecraft due to their excellent working characteristics. However,the complex space radiation environment induces primary knock-on atoms(PKAs) in BJTs through collisions, resulting in hard-to-recover displacement damage and affecting the performance of electronic components. In this paper, the properties of PKAs induced by typical space heavy ions(C, N, O, Fe) in BJTs are investigated using Monte Carlo simulations. The simulated results show that the energy spectrum of ion-induced PKAs is primarily concentrated in the low-energy range(17eV–100eV) and displays similar features across all tested ions. The PKAs induced by the collision of energetic ions have large forward scattering angles, mainly around 88°. Moreover, the distribution of PKAs within a transistor as a function of depth displays a peak characteristic, and the peak position is linearly proportional to the incident energy at a certain energy range. These simulation outcomes serve as crucial theoretical support for long-term semiconductor material defect evolution and ground testing of semiconductor devices.
