The present paper aims at giving some general ideas concerning the micromechanical approach of the strength of a porous material. It is shown that its determination theoretically amounts to solving a nonlinear boundar...The present paper aims at giving some general ideas concerning the micromechanical approach of the strength of a porous material. It is shown that its determination theoretically amounts to solving a nonlinear boundary value problem defined on a representative elementary volume(REV). The principle of nonlinear homogenization is illustrated based on the case of a solid phase having a Green’s strength criterion. An original refinement of the so-called secant method(based on two reference strains) is also provided. The paper also describes the main feature of the Gurson’s model which implements the principle of limit analysis on a conceptual model of hollow sphere. The last part of the paper gives some ideas concerning poromechanical couplings.展开更多
5G时代,为了提升用户感知、缩短呼叫建立时延、增强实时语音通信的清晰度,3GPP标准引入了5G新通话(voice over new radio,VoNR)。VoNR是让语音、视频和数据业务都承载在5G网络上,让用户体验到VoNR带来的更加高清优质的音/视频通话服务,...5G时代,为了提升用户感知、缩短呼叫建立时延、增强实时语音通信的清晰度,3GPP标准引入了5G新通话(voice over new radio,VoNR)。VoNR是让语音、视频和数据业务都承载在5G网络上,让用户体验到VoNR带来的更加高清优质的音/视频通话服务,并且能在拨打电话的同时畅享5G高速数据上网业务。从语音通信技术发展历程、VoNR技术特点等方面,对VoNR语音解决方案和实施效果进行了深入剖析,并指出了VoNR语音解决方案当前面临的挑战,为后继VoNR语音全国实施提供了技术借鉴。展开更多
文摘The present paper aims at giving some general ideas concerning the micromechanical approach of the strength of a porous material. It is shown that its determination theoretically amounts to solving a nonlinear boundary value problem defined on a representative elementary volume(REV). The principle of nonlinear homogenization is illustrated based on the case of a solid phase having a Green’s strength criterion. An original refinement of the so-called secant method(based on two reference strains) is also provided. The paper also describes the main feature of the Gurson’s model which implements the principle of limit analysis on a conceptual model of hollow sphere. The last part of the paper gives some ideas concerning poromechanical couplings.
文摘5G时代,为了提升用户感知、缩短呼叫建立时延、增强实时语音通信的清晰度,3GPP标准引入了5G新通话(voice over new radio,VoNR)。VoNR是让语音、视频和数据业务都承载在5G网络上,让用户体验到VoNR带来的更加高清优质的音/视频通话服务,并且能在拨打电话的同时畅享5G高速数据上网业务。从语音通信技术发展历程、VoNR技术特点等方面,对VoNR语音解决方案和实施效果进行了深入剖析,并指出了VoNR语音解决方案当前面临的挑战,为后继VoNR语音全国实施提供了技术借鉴。
