不断进取的AXE10

有近２０年历史的爱立信ＡＸＥ１０交换机在信息时代到来之际再放异彩，目前，它作为公共平台广泛应用于ＰＳＴＮ、ＩＳＤＮ、ＩＮ，ＰＬＭＮ、信令网和商务通信等。     

Pressure control for complete denture impressions

Pressures produced during a final impression have been discussed from the standpoint of where they should be applied and where they should be reduced. Areas of the edentulous mouth requiring little pressure are: the palate, residual ridges, and areas of easily displaced gingiva. More pressure is needed in the border seal, on the buccal shelf, and against the retromylohyoid fossa. A clear processed acrylic resin tray with escape holes has been shown to meet the requirements for selective pressure application. Zinc oxide paste is the final impression material of choice in most instances.     

电信网络管理的望族——TMOS

电信管理及运营支撑是爱立信公司为公用电信网提供的有关管理及运营支撑功能的综合方案，本文介绍了其中的公网管理系统和蜂窝移动网络管理系统。     

Ca(2+)-dependent kinase and phosphatase control inositol 1,4,5-trisphosphate-mediated Ca2+ release. Modification by agonist stimulation

A permeable cell system in which Ca2+ release can be evoked by inositol 1,4,5-trisphosphate (IP3) or agonist stimulation was used to study the regulation of Ca2+ release by Ca2+ itself. At low concentrations, Ca2+ activated IP3-mediated Ca2+ release (IMCR) with half-maximal effect at about 15 nM. At high concentrations, Ca2+ inhibited IMCR giving rise to a biphasic [Ca2+] dependence of IMCR. The activation of IMCR by Ca2+ appears to be mediated by a kinase, probably the Ca(2+)-and calmodulin-dependent protein kinase (CaMKII). Thus, the activation required MgATP, completely blocked at 0 degrees C, required Ca2+, and was inhibited by the CaMKII inhibitors KT5926 and KN62. The inhibition of IMCR seems to be mediated by a protein phosphatase, probably the Ca(2+)-dependent protein phosphatase 2B. Hence, the inhibition required Ca2+, was prevented by the general protein phosphatase inhibitor pyrophosphate and by the immunosuppressants cyclosporin A and FK506, but not by okadaic acid or VO4(2-), and was modified by chelating agents such as EGTA. Stimulation with agonists modified the activities of the kinase and phosphatase to make the release independent of [Ca2+]. This appears to be due to an increase in the apparent affinity for Ca2+ in stimulating IMCR and inhibition of the phosphatase. We suggest that agonist-dependent modification of the kinase/phosphatase activity ratio can be the biochemical pathway responsible for regulation of Ca2+ release and in turn [Ca2+]i oscillations.     

Finite element analysis of the indentation stress characteristics of the thin film/substrate systems by flat cylindrical indenters

The indentation stress characteristics of thin film/substrate systems by the flat cylindrical indenters have been simulated by means of the finite element method (FEM). The emphasis was put on the stress distribution ahead of the indenters. The influences of the friction coefficient between the indenter and the thin film, the thickness and hardening modulus of the thin film have been considered. It is found that the stress distribution was not affected by the friction coefficient. But the influence of the thickness and hardening modulus of the thin film on the stress distribution was obvious. At small indentation depth, the plastic deformation occurs at the edge of the indenter only, and the zone will propagation both vertically and laterally with the indentation depth increasing. When the indentation depth reaches a certain value, the thin film at the interface will occur the deformation plastic zone for the case studied in this paper. At lager depths, the two plastic zones will connect, and then the plastic zone propagates along the lateral direction. Beside, it is also found that the maximum of the Mises stress and the shearing stress on the interface occur at 0.8r and r(r is the radius of the indenter), respectively.     

爱立信电信能源新概念

能源系统作为民信系统的心谖，其地位举足轻重，爱立信能源新概念为用户提供了包括电源系统、气候控制系统、ＡＣ电源接口、备用系统、不间断ＡＣ电源及能源管理系统在内的综合电信能源系统。