Basic components of Provider Backbone Bridge (PBB) network models were constructed: PBB interior switch, PBB edge switch—with the dynamic filling up of address tables. The modeling of PBB networks was implemented. Th...Basic components of Provider Backbone Bridge (PBB) network models were constructed: PBB interior switch, PBB edge switch—with the dynamic filling up of address tables. The modeling of PBB networks was implemented. The results of simulation reveal definite imperfections of PBB technology caused by the broad-casting and sensitivity to the ageing time of the address tables’ records, which complicates the guaranteeing of a given QoS. The preliminary comparison confirms definite advantages of E6 addressing before PBB.展开更多
The thermal diffusivities of new PbB4O7, crystal determined by the optical beam deflection (OBD) technique at room temperature are provided. The experimental results indicate that the thermal diffusivities of this cry...The thermal diffusivities of new PbB4O7, crystal determined by the optical beam deflection (OBD) technique at room temperature are provided. The experimental results indicate that the thermal diffusivities of this crystal in the orientations of the three main axes are anisotropic; there is an elliptical distribution of the thermal diffusivities versus the detecting angle in the X-Z plane for the 0° Y-cut plate. This result agrees with the theoretical estimation.展开更多
文摘Basic components of Provider Backbone Bridge (PBB) network models were constructed: PBB interior switch, PBB edge switch—with the dynamic filling up of address tables. The modeling of PBB networks was implemented. The results of simulation reveal definite imperfections of PBB technology caused by the broad-casting and sensitivity to the ageing time of the address tables’ records, which complicates the guaranteeing of a given QoS. The preliminary comparison confirms definite advantages of E6 addressing before PBB.
文摘The thermal diffusivities of new PbB4O7, crystal determined by the optical beam deflection (OBD) technique at room temperature are provided. The experimental results indicate that the thermal diffusivities of this crystal in the orientations of the three main axes are anisotropic; there is an elliptical distribution of the thermal diffusivities versus the detecting angle in the X-Z plane for the 0° Y-cut plate. This result agrees with the theoretical estimation.
