The time-history responses of the surface were obtained for a linear elastic half-plane including regularly distributed enormous embedded circular cavities subjected to propagating obliquely incident plane SH-waves. A...The time-history responses of the surface were obtained for a linear elastic half-plane including regularly distributed enormous embedded circular cavities subjected to propagating obliquely incident plane SH-waves. An advanced numerical approach named half-plane time-domain boundary element method（BEM）, which only located the meshes around the cavities, was used to create the model. By establishing the modified boundary integral equation（BIE）independently for each cavity and forming the matrices, the final coupled equation was solved step-by-step in the timedomain to obtain the boundary values. The responses were developed for a half-plane with 512 cavities. The amplification patterns were also obtained to illustrate the frequencydomain responses for some cases. According to the results,the presence of enormous cavities affects the scattering and diffraction of the waves arrived to the surface. The introduced method can be recommended for geotechnical/mechanical engineers to model structures in the fields of earthquake engineering and composite materials.展开更多
分析家庭宽带PON(passive optical network,无源光网络)接入网络中OLT(optical line terminal,光线路终端)用户的承载能力,计算PON端口接入距离。依据理论计算,结合PON实例,给出了PON结构优化的参考方案。同时,在考虑对现网资源节约的...分析家庭宽带PON(passive optical network,无源光网络)接入网络中OLT(optical line terminal,光线路终端)用户的承载能力,计算PON端口接入距离。依据理论计算,结合PON实例,给出了PON结构优化的参考方案。同时,在考虑对现网资源节约的前提下,通过对OLT承载用户数的分裂及用户接入距离的优化,来提升用户感知度。展开更多
随着互联网用户数量的迅猛增长和物联网设备的普及,全球范围内的网络运营商和服务提供商逐步开始向网际互连协议第6版(Internet Protocol Version 6,IPv6)过渡。在这一背景下,广电网络作为重要的通信基础设施,也面临着向IPv6过渡的迫切...随着互联网用户数量的迅猛增长和物联网设备的普及,全球范围内的网络运营商和服务提供商逐步开始向网际互连协议第6版(Internet Protocol Version 6,IPv6)过渡。在这一背景下,广电网络作为重要的通信基础设施,也面临着向IPv6过渡的迫切需求。基于此,深入分析广电网络向IPv6过渡的技术挑战并提出针对性的解决方案,为未来的广电网络发展提供参考。展开更多
文摘The time-history responses of the surface were obtained for a linear elastic half-plane including regularly distributed enormous embedded circular cavities subjected to propagating obliquely incident plane SH-waves. An advanced numerical approach named half-plane time-domain boundary element method（BEM）, which only located the meshes around the cavities, was used to create the model. By establishing the modified boundary integral equation（BIE）independently for each cavity and forming the matrices, the final coupled equation was solved step-by-step in the timedomain to obtain the boundary values. The responses were developed for a half-plane with 512 cavities. The amplification patterns were also obtained to illustrate the frequencydomain responses for some cases. According to the results,the presence of enormous cavities affects the scattering and diffraction of the waves arrived to the surface. The introduced method can be recommended for geotechnical/mechanical engineers to model structures in the fields of earthquake engineering and composite materials.
文摘分析家庭宽带PON(passive optical network,无源光网络)接入网络中OLT(optical line terminal,光线路终端)用户的承载能力,计算PON端口接入距离。依据理论计算,结合PON实例,给出了PON结构优化的参考方案。同时,在考虑对现网资源节约的前提下,通过对OLT承载用户数的分裂及用户接入距离的优化,来提升用户感知度。
文摘随着互联网用户数量的迅猛增长和物联网设备的普及,全球范围内的网络运营商和服务提供商逐步开始向网际互连协议第6版(Internet Protocol Version 6,IPv6)过渡。在这一背景下,广电网络作为重要的通信基础设施,也面临着向IPv6过渡的迫切需求。基于此,深入分析广电网络向IPv6过渡的技术挑战并提出针对性的解决方案,为未来的广电网络发展提供参考。
