The neutron star as a supernova remnant is attracting high attention recently due to the gravitation wave detection and precise measurements about its mass and radius.In particular,the compact object with a mass of 2....The neutron star as a supernova remnant is attracting high attention recently due to the gravitation wave detection and precise measurements about its mass and radius.In particular,the compact object with a mass of 2.50-2.67 M_(⊙)observed by LIGO Scientific and Virgo collaborations in GW190814,as well as the recent report of a light compact object with a mass and radius of M=0.77_(-0.17)^(+0.20)M_(⊙)and R=10.4_(-0.78)^(+0.86)km within the supernova remnant HESS J1731-347,have posed a great challenge to the investigations into the supranuclear matter.In the inner core of a neutron star,the strangeness degrees of freedom,such as the hyperons,can be present to form a hyperon star.In this work,the neutron star consisting of nucleons and leptons,and the hyperonic star including the hyperons will be studied in the framework of the density-dependent relativistic mean-field(DDRMF)model.Some popular DDRMF parameterizations will be adopted to investigate the properties of nuclear matter and the mass,radius,tidal deformability,and other properties of neutron star and hyperonic stars.We find that the maximum masses of neutron star calculated by DD-MEX,DD-MEX1,DD-MEX2,DD-MEXY and DD-LZ1 sets can be around 2.5-2.6 MM_(⊙)because they can produce quite stiff equations of state(EOSs)due to the strong repulsive contributions from vector potentials at high densities.Moreover,by investigating the influence of the crust EOS and core EOS on the neutron stars,we find that the observational data from HESS J1731-347 suggest the requirement of a crust EOS with a higher L parameter and a core EOS with a lower L parameter,and the M-R relations from the constructed EOSs can also be consistent with the observables of PSR J0740+6620,PSR J0030+0451 from NICER and the GW170817 event.With the inclusion of hyperons,the hyperonic star matter becomes softer compared to the neutron star matter,but the massive hyperonic star can also be obtained with DDRMF parameter sets if the vector meson coupling constants are strong.展开更多
随着系统复杂度的不断提高,传统封装技术已不能满足多芯片、多器件的高性能互联。而三维系统级封装(3D-system in package,3D-SiP)通过多层堆叠和立体互联实现了芯片和器件的高性能集成。其中,硅通孔(Throughsiliconvia,TSV)结构在3D-S...随着系统复杂度的不断提高,传统封装技术已不能满足多芯片、多器件的高性能互联。而三维系统级封装(3D-system in package,3D-SiP)通过多层堆叠和立体互联实现了芯片和器件的高性能集成。其中,硅通孔(Throughsiliconvia,TSV)结构在3D-Si P中发挥着极为关键的作用。系统性的回顾了TSV技术的研究进展,包括TSV的技术背景、生产制造、键合工艺和应用特色,同时对比并总结了不同制造工艺和键合工艺的优缺点,如制造工艺中的刻蚀、激光钻孔、沉积薄膜和金属填充,键合工艺中的焊锡凸点制备、铜柱凸点制备和混合键合,讨论了TSV当前面临的挑战,展望了TSV未来的发展趋势。展开更多
文摘The neutron star as a supernova remnant is attracting high attention recently due to the gravitation wave detection and precise measurements about its mass and radius.In particular,the compact object with a mass of 2.50-2.67 M_(⊙)observed by LIGO Scientific and Virgo collaborations in GW190814,as well as the recent report of a light compact object with a mass and radius of M=0.77_(-0.17)^(+0.20)M_(⊙)and R=10.4_(-0.78)^(+0.86)km within the supernova remnant HESS J1731-347,have posed a great challenge to the investigations into the supranuclear matter.In the inner core of a neutron star,the strangeness degrees of freedom,such as the hyperons,can be present to form a hyperon star.In this work,the neutron star consisting of nucleons and leptons,and the hyperonic star including the hyperons will be studied in the framework of the density-dependent relativistic mean-field(DDRMF)model.Some popular DDRMF parameterizations will be adopted to investigate the properties of nuclear matter and the mass,radius,tidal deformability,and other properties of neutron star and hyperonic stars.We find that the maximum masses of neutron star calculated by DD-MEX,DD-MEX1,DD-MEX2,DD-MEXY and DD-LZ1 sets can be around 2.5-2.6 MM_(⊙)because they can produce quite stiff equations of state(EOSs)due to the strong repulsive contributions from vector potentials at high densities.Moreover,by investigating the influence of the crust EOS and core EOS on the neutron stars,we find that the observational data from HESS J1731-347 suggest the requirement of a crust EOS with a higher L parameter and a core EOS with a lower L parameter,and the M-R relations from the constructed EOSs can also be consistent with the observables of PSR J0740+6620,PSR J0030+0451 from NICER and the GW170817 event.With the inclusion of hyperons,the hyperonic star matter becomes softer compared to the neutron star matter,but the massive hyperonic star can also be obtained with DDRMF parameter sets if the vector meson coupling constants are strong.
文摘随着系统复杂度的不断提高,传统封装技术已不能满足多芯片、多器件的高性能互联。而三维系统级封装(3D-system in package,3D-SiP)通过多层堆叠和立体互联实现了芯片和器件的高性能集成。其中,硅通孔(Throughsiliconvia,TSV)结构在3D-Si P中发挥着极为关键的作用。系统性的回顾了TSV技术的研究进展,包括TSV的技术背景、生产制造、键合工艺和应用特色,同时对比并总结了不同制造工艺和键合工艺的优缺点,如制造工艺中的刻蚀、激光钻孔、沉积薄膜和金属填充,键合工艺中的焊锡凸点制备、铜柱凸点制备和混合键合,讨论了TSV当前面临的挑战,展望了TSV未来的发展趋势。
