A virtual loop model was built by the transmission analysis with virtual ground method to assist the negative-resistance oscillator design, providing more perspectives on output power and phase-noise optimization. In ...A virtual loop model was built by the transmission analysis with virtual ground method to assist the negative-resistance oscillator design, providing more perspectives on output power and phase-noise optimization. In this work, the virtual loop described the original circuit successfully and the optimizations were effective. A 10 GHz high-efficiency low phase-noise oscillator utilizing an InGaP/GaAs HBT was achieved. The 10.028 GHz oscillator delivered an output power of over 15 dBm with a phase-noise of lower than -107 dBc/Hz at 100 kHz offset. The efficiency of DC to RF transformation was 35 %. The results led to a good oscillator figure of merit of-188 dBc/Hz. The measurement results agreed well with those of the simulations.展开更多
同步经颅磁刺激-脑电图(transcranial magnetic stimulation-electroencephalography,TMS-EEG)是一种将经颅磁刺激与脑电记录同步整合的技术。一方面,EEG能够记录TMS脉冲引起的瞬时神经电生理反应,另一方面,TMS脉冲的施加也能基于所记录...同步经颅磁刺激-脑电图(transcranial magnetic stimulation-electroencephalography,TMS-EEG)是一种将经颅磁刺激与脑电记录同步整合的技术。一方面,EEG能够记录TMS脉冲引起的瞬时神经电生理反应,另一方面,TMS脉冲的施加也能基于所记录的EEG信号来进行状态依赖的精准调控。本文结合这两个特点提出并系统梳理了同步TMS-EEG在心理学研究中的三种主要应用模式:神经生理评估、因果性揭示神经机制以及大脑闭环调控。文章将围绕这三条主线,区分并比较不同模式在工作机制、实验方案与应用目标上的差异,并结合近10年的心理学相关研究,梳理各模式已有研究的主要发现,以期为应用同步TMS-EEG技术提供清晰的理论框架与实践指南。展开更多
By building a turbine charged diesel engine model and a proportional electromagnet-rack model in Matlab/Simulink and using dSPACE,a hardware-in-loop(HIL) simulation platform for the electronic governor is constructed....By building a turbine charged diesel engine model and a proportional electromagnet-rack model in Matlab/Simulink and using dSPACE,a hardware-in-loop(HIL) simulation platform for the electronic governor is constructed.A developed electronic governor is simulated in this platform.The comparison between the experiment and simulation results indicates that the built models can meet the HIL requirements.The control parameters obtained from virtual calibration and the control algorithm validated by HIL simulation can be applied in real bench experiments directly.展开更多
文摘A virtual loop model was built by the transmission analysis with virtual ground method to assist the negative-resistance oscillator design, providing more perspectives on output power and phase-noise optimization. In this work, the virtual loop described the original circuit successfully and the optimizations were effective. A 10 GHz high-efficiency low phase-noise oscillator utilizing an InGaP/GaAs HBT was achieved. The 10.028 GHz oscillator delivered an output power of over 15 dBm with a phase-noise of lower than -107 dBc/Hz at 100 kHz offset. The efficiency of DC to RF transformation was 35 %. The results led to a good oscillator figure of merit of-188 dBc/Hz. The measurement results agreed well with those of the simulations.
文摘同步经颅磁刺激-脑电图(transcranial magnetic stimulation-electroencephalography,TMS-EEG)是一种将经颅磁刺激与脑电记录同步整合的技术。一方面,EEG能够记录TMS脉冲引起的瞬时神经电生理反应,另一方面,TMS脉冲的施加也能基于所记录的EEG信号来进行状态依赖的精准调控。本文结合这两个特点提出并系统梳理了同步TMS-EEG在心理学研究中的三种主要应用模式:神经生理评估、因果性揭示神经机制以及大脑闭环调控。文章将围绕这三条主线,区分并比较不同模式在工作机制、实验方案与应用目标上的差异,并结合近10年的心理学相关研究,梳理各模式已有研究的主要发现,以期为应用同步TMS-EEG技术提供清晰的理论框架与实践指南。
文摘By building a turbine charged diesel engine model and a proportional electromagnet-rack model in Matlab/Simulink and using dSPACE,a hardware-in-loop(HIL) simulation platform for the electronic governor is constructed.A developed electronic governor is simulated in this platform.The comparison between the experiment and simulation results indicates that the built models can meet the HIL requirements.The control parameters obtained from virtual calibration and the control algorithm validated by HIL simulation can be applied in real bench experiments directly.
