O484.1 2003064264基于遗传算法的光学膜系初始结构优化设计=Originalstructure optimization of optical multilayer using genetic algorithm[刊,中]/范志刚(哈尔滨工业大学电子科学与技术系.黑龙江,哈尔滨(150001)),张爱红…∥光学技...O484.1 2003064264基于遗传算法的光学膜系初始结构优化设计=Originalstructure optimization of optical multilayer using genetic algorithm[刊,中]/范志刚(哈尔滨工业大学电子科学与技术系.黑龙江,哈尔滨(150001)),张爱红…∥光学技术.-2002,28(6).-513-514,517针对多膜料设计,提出了一种新的膜系初始结构优化设计算法。将膜系的初始设计视为组合优化问题,采用遗传算法,求得组合的最优解。给出了算法的原理,并给出了相应的设计实例。结果表明,本算法是一种简单、有效、通用性强的膜系初始化设计方法。图4参5(于晓光)展开更多
A recently released XMM-Newton note revealed a significant calibration issue between nuclear spectroscopic telescope array(NuSTAR)and XMM-Newton European Photon Imaging Camera(EPIC)and provided an empirical correction...A recently released XMM-Newton note revealed a significant calibration issue between nuclear spectroscopic telescope array(NuSTAR)and XMM-Newton European Photon Imaging Camera(EPIC)and provided an empirical correction to the EPIC effective area.To quantify the bias caused by the calibration issue in the joint analysis of XMM-NuSTAR spectra and verify the effectiveness of the correction,in this work,we perform joint-fitting of the NuSTAR and EPIC-pn spectra for a large sample of 104 observation pairs of 44 X-ray bright active galactic nuclei(AGN).The spectra were extracted after requiring perfect simultaneity between the XMM-Newton and NuSTAR exposures(merging good time intervals(GTIs)from two missions)to avoid bias due to the rapid spectral variability of the AGN.Before the correction,the EPIC-pn spectra are systematically harder than the corresponding NuSTAR spectra by■subsequently yielding significantly underestimated cutoff energy E_(cut)and the strength of reflection component R when performing joint-fitting.We confirm that the correction is highly effective and can commendably erase the discrepancy in best-fitΓ,E_(cut),and R.We thus urge the community to apply the correction when joint-fitting XMM-NuSTAR spectra,but note that the correction is limited to 3–12 keV and therefore not applicable when the soft X-ray band data are included.Besides,we show that as merging GTIs from two missions would cause severe loss of NuSTAR net exposure time,in many cases,joint-fitting yields no advantage compared with utilizing NuSTAR data alone.Finally,We present a technical note on filtering periods of high background flares for XMM-Newton EPIC-pn exposures in the small window(SW)mode.展开更多
TB43 98031873保偏光纤偏振器的介质—金属复合光学膜系=Filmsystem of composite dielectric buffer and met-al layers in a polarizer of polarization main-taining fiber[刊,中]/陈哲,胡永明,曾淳,王纪武(国防科技大学应用物理系....TB43 98031873保偏光纤偏振器的介质—金属复合光学膜系=Filmsystem of composite dielectric buffer and met-al layers in a polarizer of polarization main-taining fiber[刊,中]/陈哲,胡永明,曾淳,王纪武(国防科技大学应用物理系.湖南.长沙(410073))展开更多
TB43 97031921 多层介质光学膜系的误差分析:膜层厚度变化的灵敏度因子=Error analysis of dielectric optical multilayer-variation of sensitivity factor with layerthickness[刊,中]/范志刚(哈尔滨工业大学航天工程与力学系.黑龙江...TB43 97031921 多层介质光学膜系的误差分析:膜层厚度变化的灵敏度因子=Error analysis of dielectric optical multilayer-variation of sensitivity factor with layerthickness[刊,中]/范志刚(哈尔滨工业大学航天工程与力学系.黑龙江,哈尔滨(150001))//激光技术.-1996,20(4).展开更多
文摘O484.1 2003064264基于遗传算法的光学膜系初始结构优化设计=Originalstructure optimization of optical multilayer using genetic algorithm[刊,中]/范志刚(哈尔滨工业大学电子科学与技术系.黑龙江,哈尔滨(150001)),张爱红…∥光学技术.-2002,28(6).-513-514,517针对多膜料设计,提出了一种新的膜系初始结构优化设计算法。将膜系的初始设计视为组合优化问题,采用遗传算法,求得组合的最优解。给出了算法的原理,并给出了相应的设计实例。结果表明,本算法是一种简单、有效、通用性强的膜系初始化设计方法。图4参5(于晓光)
基金supported by the National Natural Science Foundation of China(12033006,12192221,123B2042).
文摘A recently released XMM-Newton note revealed a significant calibration issue between nuclear spectroscopic telescope array(NuSTAR)and XMM-Newton European Photon Imaging Camera(EPIC)and provided an empirical correction to the EPIC effective area.To quantify the bias caused by the calibration issue in the joint analysis of XMM-NuSTAR spectra and verify the effectiveness of the correction,in this work,we perform joint-fitting of the NuSTAR and EPIC-pn spectra for a large sample of 104 observation pairs of 44 X-ray bright active galactic nuclei(AGN).The spectra were extracted after requiring perfect simultaneity between the XMM-Newton and NuSTAR exposures(merging good time intervals(GTIs)from two missions)to avoid bias due to the rapid spectral variability of the AGN.Before the correction,the EPIC-pn spectra are systematically harder than the corresponding NuSTAR spectra by■subsequently yielding significantly underestimated cutoff energy E_(cut)and the strength of reflection component R when performing joint-fitting.We confirm that the correction is highly effective and can commendably erase the discrepancy in best-fitΓ,E_(cut),and R.We thus urge the community to apply the correction when joint-fitting XMM-NuSTAR spectra,but note that the correction is limited to 3–12 keV and therefore not applicable when the soft X-ray band data are included.Besides,we show that as merging GTIs from two missions would cause severe loss of NuSTAR net exposure time,in many cases,joint-fitting yields no advantage compared with utilizing NuSTAR data alone.Finally,We present a technical note on filtering periods of high background flares for XMM-Newton EPIC-pn exposures in the small window(SW)mode.
文摘TB43 98031873保偏光纤偏振器的介质—金属复合光学膜系=Filmsystem of composite dielectric buffer and met-al layers in a polarizer of polarization main-taining fiber[刊,中]/陈哲,胡永明,曾淳,王纪武(国防科技大学应用物理系.湖南.长沙(410073))
文摘TB43 97031921 多层介质光学膜系的误差分析:膜层厚度变化的灵敏度因子=Error analysis of dielectric optical multilayer-variation of sensitivity factor with layerthickness[刊,中]/范志刚(哈尔滨工业大学航天工程与力学系.黑龙江,哈尔滨(150001))//激光技术.-1996,20(4).
