基于多运营商的CTI(Call Processing Platform)呼叫处理平台,以对SS7(Signaling System No.7)信令的解析为基础,在技术上实现了业务层与呼叫控制层以及呼叫控制层与媒体接入层的分离。通过以上分离,使业务层独立于网络层,为用户灵活地实...基于多运营商的CTI(Call Processing Platform)呼叫处理平台,以对SS7(Signaling System No.7)信令的解析为基础,在技术上实现了业务层与呼叫控制层以及呼叫控制层与媒体接入层的分离。通过以上分离,使业务层独立于网络层,为用户灵活地实现CTI业务提供奠定了基础。由于业务层可以完全独立,因此通过TCP/IP协议互连,可将应用服务程序放置在网络的任何地方。展开更多
A coupled expression system for plants was established in this study. The 5’-terminal of T7 RNA poly-merase gene was modified by addition of the coding sequence of nuclear location signal from SV40 large T antigen. P...A coupled expression system for plants was established in this study. The 5’-terminal of T7 RNA poly-merase gene was modified by addition of the coding sequence of nuclear location signal from SV40 large T antigen. Plant expression vector pBBT7 was constructed with the modified T7 RNA polymerase gene under the control of CaMV35S promoter. Another expression vector pBTG contained cassette of gusA controlled by T7 promoter. The two vectors were co-transformed into tobacco via the Agrobecte-rium -mediated method. Results of GUS activity indicated that the co-transformed plant with pBBT7 and pBTG showed a high level of GUS activity. The results demonstrated that the coupled expression system of T7 polymerase and T7 promoter was workable in plants.展开更多
文摘基于多运营商的CTI(Call Processing Platform)呼叫处理平台,以对SS7(Signaling System No.7)信令的解析为基础,在技术上实现了业务层与呼叫控制层以及呼叫控制层与媒体接入层的分离。通过以上分离,使业务层独立于网络层,为用户灵活地实现CTI业务提供奠定了基础。由于业务层可以完全独立,因此通过TCP/IP协议互连,可将应用服务程序放置在网络的任何地方。
基金This work was supported by the National Natural Science Foundation of China (Grant Nos. 39989001, 39980024 and 39880023) the High Technology Research and Development Program of China (Grant Nos. 2001AA212041, 2001AA222251 and 101-06-01-06)the Nationa
文摘A coupled expression system for plants was established in this study. The 5’-terminal of T7 RNA poly-merase gene was modified by addition of the coding sequence of nuclear location signal from SV40 large T antigen. Plant expression vector pBBT7 was constructed with the modified T7 RNA polymerase gene under the control of CaMV35S promoter. Another expression vector pBTG contained cassette of gusA controlled by T7 promoter. The two vectors were co-transformed into tobacco via the Agrobecte-rium -mediated method. Results of GUS activity indicated that the co-transformed plant with pBBT7 and pBTG showed a high level of GUS activity. The results demonstrated that the coupled expression system of T7 polymerase and T7 promoter was workable in plants.
