Little information is available about the effects of exposure to pulsed microwaves on neuronal Ca2+signaling under non‐thermal conditions.In this study,rat pheochromocytoma(PC12)cells were exposed to pulsed microwave...Little information is available about the effects of exposure to pulsed microwaves on neuronal Ca2+signaling under non‐thermal conditions.In this study,rat pheochromocytoma(PC12)cells were exposed to pulsed microwaves for 6 min at a specific absorption rate(SAR)of 4 W/kg to assess possible real‐time effects.During microwave exposure,free calcium dynamics in the cytosol,mitochondria,and nucleus of cells were monitored by time‐lapse microfluorimetry using a展开更多
本研究在WACCM+DART(Whole Atmosphere Community Climate Model,Data Assimilation Research TestBed)临近空间资料同化预报系统中加入SABER(Sounding of the Atmosphere using Broadband Emission Radiometry)和MLS(Microwave Limb So...本研究在WACCM+DART(Whole Atmosphere Community Climate Model,Data Assimilation Research TestBed)临近空间资料同化预报系统中加入SABER(Sounding of the Atmosphere using Broadband Emission Radiometry)和MLS(Microwave Limb Sounder)臭氧观测同化接口,并以2016年2月一次平流层爆发性增温(SSW)过程为模拟个例进行了SABER和MLS臭氧观测同化试验,得出以下结论:同化SABER和MLS臭氧体积浓度观测得出的WACCM+DART臭氧分析场能够较真实反映SSW期间北极上空平流层臭氧廓线随时间的演变特征,且与ERA5(Fifth Generation of ECMWF Reanalyses)再分析资料描述的臭氧变化特征具有很好的一致性;基于SABER和MLS臭氧观测的WACCM臭氧6 h预报检验表明同化臭氧观测对臭氧分析和预报误差的改善效果主要体现在南半球高纬平流层和北半球中高纬平流层中上层—中间层底部;基于ERA5再分析资料的WACCM+DART分析场检验表明同化SABER和MLS臭氧体积浓度资料可在提高北半球高纬地区上平流层—中间层底部臭氧场分析质量的同时减小该地区上平流层—中间层底部温度场和中间层底部纬向风场的分析误差;基于MLS臭氧资料的臭氧中期预报检验表明相对控制试验同化SABER和MLS臭氧体积浓度资料能更好改善0~5 d下平流层和中间层底部臭氧的预报效果。展开更多
We demonstrate significantly improved performance of a microwave true time delay line based on an integrated optical frequency comb source. The broadband micro-comb(over 100 nm wide) features a record low free spectra...We demonstrate significantly improved performance of a microwave true time delay line based on an integrated optical frequency comb source. The broadband micro-comb(over 100 nm wide) features a record low free spectral range(FSR) of 49 GHz, resulting in an unprecedented record high channel number(81 over the C band)—the highest number of channels for an integrated comb source used for microwave signal processing. We theoretically analyze the performance of a phased array antenna and show that this large channel count results in a high angular resolution and wide beam-steering tunable range. This demonstrates the feasibility of our approach as a competitive solution toward implementing integrated photonic true time delays in radar and communications systems.展开更多
We present and demonstrate experimentally a new method for measuring the polarization-mode-dispersion(PMD) of a Chirped Fiber Bragg Grating. The technique has also been applied to accurate chromatic dispersion evaluat...We present and demonstrate experimentally a new method for measuring the polarization-mode-dispersion(PMD) of a Chirped Fiber Bragg Grating. The technique has also been applied to accurate chromatic dispersion evaluation by removing the influence of PMD.展开更多
基金supported by the National Natural Science Foundation of China[No.31400716 and No.61401497]
文摘Little information is available about the effects of exposure to pulsed microwaves on neuronal Ca2+signaling under non‐thermal conditions.In this study,rat pheochromocytoma(PC12)cells were exposed to pulsed microwaves for 6 min at a specific absorption rate(SAR)of 4 W/kg to assess possible real‐time effects.During microwave exposure,free calcium dynamics in the cytosol,mitochondria,and nucleus of cells were monitored by time‐lapse microfluorimetry using a
文摘本研究在WACCM+DART(Whole Atmosphere Community Climate Model,Data Assimilation Research TestBed)临近空间资料同化预报系统中加入SABER(Sounding of the Atmosphere using Broadband Emission Radiometry)和MLS(Microwave Limb Sounder)臭氧观测同化接口,并以2016年2月一次平流层爆发性增温(SSW)过程为模拟个例进行了SABER和MLS臭氧观测同化试验,得出以下结论:同化SABER和MLS臭氧体积浓度观测得出的WACCM+DART臭氧分析场能够较真实反映SSW期间北极上空平流层臭氧廓线随时间的演变特征,且与ERA5(Fifth Generation of ECMWF Reanalyses)再分析资料描述的臭氧变化特征具有很好的一致性;基于SABER和MLS臭氧观测的WACCM臭氧6 h预报检验表明同化臭氧观测对臭氧分析和预报误差的改善效果主要体现在南半球高纬平流层和北半球中高纬平流层中上层—中间层底部;基于ERA5再分析资料的WACCM+DART分析场检验表明同化SABER和MLS臭氧体积浓度资料可在提高北半球高纬地区上平流层—中间层底部臭氧场分析质量的同时减小该地区上平流层—中间层底部温度场和中间层底部纬向风场的分析误差;基于MLS臭氧资料的臭氧中期预报检验表明相对控制试验同化SABER和MLS臭氧体积浓度资料能更好改善0~5 d下平流层和中间层底部臭氧的预报效果。
基金Australian Research Council(ARC)Discovery Projects Program(DP150104327)Strategic,Discovery and Acceleration Grants Schemes of Natural Sciences and Engineering Research Council of Canada(NSERC)+4 种基金MESI PSR-SIIRI Initiative in QuebecCanada Research Chairs ProgramITMO Fellowship and Professorship Program of the Government of the Russian Federation(074-U 01)1000 Talents Sichuan Program in ChinaStrategic Priority Research Program of the Chinese Academy of Sciences(CAS)(XDB24030000)
文摘We demonstrate significantly improved performance of a microwave true time delay line based on an integrated optical frequency comb source. The broadband micro-comb(over 100 nm wide) features a record low free spectral range(FSR) of 49 GHz, resulting in an unprecedented record high channel number(81 over the C band)—the highest number of channels for an integrated comb source used for microwave signal processing. We theoretically analyze the performance of a phased array antenna and show that this large channel count results in a high angular resolution and wide beam-steering tunable range. This demonstrates the feasibility of our approach as a competitive solution toward implementing integrated photonic true time delays in radar and communications systems.
文摘We present and demonstrate experimentally a new method for measuring the polarization-mode-dispersion(PMD) of a Chirped Fiber Bragg Grating. The technique has also been applied to accurate chromatic dispersion evaluation by removing the influence of PMD.
