LIGO-Virgo has observed the gravitational waves(GWs)from the coalescence of binary black hole(BBH)and binary neutron star(BNS)during O1 and O2,and the ones from NS-BH are expected to be hunted in the operating O3 run....LIGO-Virgo has observed the gravitational waves(GWs)from the coalescence of binary black hole(BBH)and binary neutron star(BNS)during O1 and O2,and the ones from NS-BH are expected to be hunted in the operating O3 run.The population properties and mass distribution of NS-BH mergers are poorly understood now,thus researchers simulated their chirp mass(M)distribution by a synthetic model,in which the BHs and NSs were inferred by LIGO-Virgo(O1/O2),and obtained the values in the range of 2.1 M_(⊙)<M<7.3 M_(⊙).In this paper,we further simulate the GW frequency(fGW)distribution of NS-BH mergers by the above-stated synthetic model,with a basic binary system model through the Monte Carlo method.Our results predict that the median with 90%credible intervals is 165+475-64 Hz in the case of Schwarzschild BH when the system just before merger,and this GW frequency is expected to increase several times in the merger stage,which is lying in the frequency band of LIGO-Virgo,i.e.,about 15 Hz to a few kHz.Our results provide an important reference for hunting the NS-BH mergers by the on-going O3 run of LIGO-Virgo.展开更多
太阳能界面海水淡化无需复杂的基础设施和额外的能源消耗,是一种解决全球淡水危机的有效方法.尽管现在已经开发了许多的太阳能蒸发器,但大多采用了不可持续的合成材料或(且)难以进行精确的微观结构定制,这使得其海水淡化应用的可持续性...太阳能界面海水淡化无需复杂的基础设施和额外的能源消耗,是一种解决全球淡水危机的有效方法.尽管现在已经开发了许多的太阳能蒸发器,但大多采用了不可持续的合成材料或(且)难以进行精确的微观结构定制,这使得其海水淡化应用的可持续性和性能的进一步提升受到了限制.为了解决这些问题,本文采用了两种天然分子(单宁酸和铁离子),构筑了一种轻质价廉、功能性好的界面海水淡化蒸发器.通过3D打印技术,本研究可以轻松地制备表面具有不同高度锥形阵列结构的蒸发器.该结构可以让照射到蒸发器表面的光发生多重反射,进而增加光吸收,提升光热效率,从而使其海水淡化性能进一步提升,最终在1标准太阳光下实现了1.96 kg m–2h–1的蒸发速率和94.4%的蒸发效率.此外,该蒸发器还具有优异的抗盐性能、重复利用稳定性、抗油污性能及吸附有机染料的能力,可以作为一种绿色、环保、高效的多功能水处理器件.展开更多
基金Project supported by the National Natural Science Foundation of China(Grant Nos.11988101,11773005,U2031203,U1631236,11703001,U1731238,U1938117,11725313,and 11721303)the International Partnership Program of Chinese Academy of Sciences(Grant No.114A11KYSB20160008)+1 种基金the National Key R&D Program of China(Grant No.2016YFA0400702)the Subsidy Project of the National Natural Science Foundation of China(Grant No.2021GZJ006)。
文摘LIGO-Virgo has observed the gravitational waves(GWs)from the coalescence of binary black hole(BBH)and binary neutron star(BNS)during O1 and O2,and the ones from NS-BH are expected to be hunted in the operating O3 run.The population properties and mass distribution of NS-BH mergers are poorly understood now,thus researchers simulated their chirp mass(M)distribution by a synthetic model,in which the BHs and NSs were inferred by LIGO-Virgo(O1/O2),and obtained the values in the range of 2.1 M_(⊙)<M<7.3 M_(⊙).In this paper,we further simulate the GW frequency(fGW)distribution of NS-BH mergers by the above-stated synthetic model,with a basic binary system model through the Monte Carlo method.Our results predict that the median with 90%credible intervals is 165+475-64 Hz in the case of Schwarzschild BH when the system just before merger,and this GW frequency is expected to increase several times in the merger stage,which is lying in the frequency band of LIGO-Virgo,i.e.,about 15 Hz to a few kHz.Our results provide an important reference for hunting the NS-BH mergers by the on-going O3 run of LIGO-Virgo.
基金supported by the National Natural Science Foundation of China(21975167,52225311,and 52003179)the Fundamental Research Funds for Central Universities。
文摘太阳能界面海水淡化无需复杂的基础设施和额外的能源消耗,是一种解决全球淡水危机的有效方法.尽管现在已经开发了许多的太阳能蒸发器,但大多采用了不可持续的合成材料或(且)难以进行精确的微观结构定制,这使得其海水淡化应用的可持续性和性能的进一步提升受到了限制.为了解决这些问题,本文采用了两种天然分子(单宁酸和铁离子),构筑了一种轻质价廉、功能性好的界面海水淡化蒸发器.通过3D打印技术,本研究可以轻松地制备表面具有不同高度锥形阵列结构的蒸发器.该结构可以让照射到蒸发器表面的光发生多重反射,进而增加光吸收,提升光热效率,从而使其海水淡化性能进一步提升,最终在1标准太阳光下实现了1.96 kg m–2h–1的蒸发速率和94.4%的蒸发效率.此外,该蒸发器还具有优异的抗盐性能、重复利用稳定性、抗油污性能及吸附有机染料的能力,可以作为一种绿色、环保、高效的多功能水处理器件.
