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近几十年来，在信息通信技术（ICT）快速进步的推动下，信息化对社会运行和人类生活方方面面的影响正在日益深化。文章基于数字化、网络化和智能化的发展水平，对信息化发展历程进行了回顾，并提出数字孪生阶段之后将是数字智驱和数字超越阶段。随着信息化上升为未来网络演进的最主要驱动力，文章提出了网算协同、接入协同、光电协同和智能化4个网络演进特征，并强调了光通信在其中的关键作用和挑战。

运营商迫切需要通过网络固移融合化解全业务竞争压力,而为应对成本、带宽和生存性等接入域固移融合的挑战,中国联通在ITU-T（国际电信联盟-电信组织）推动了G.metro建议。针对G.metro需求,文章提出了一种固移融合接入网架构,基于NFV（网络功能虚拟化）实现固移处理资源共享,基于波分复用环路和PON（无源光网络）的结合平衡固、移接入差异,以满足接入域简单和低成本的要求。

针对光纤通信领域技术热点Tbit/s高速光传输开展研究,分析了其关键的信道内复用技术。基于频谱效率、性能和可实现性,在对Nyquist波分复用、正交频分复用和Super-Nyquist三种技术进行比较后给出了对信道内复用技术的具体选择,并提出具有指导意义的Tbit/s高速光传输商用技术解决方案。

基于对OTN（光传送网络）技术发展方向的分析,指出SDN（软件定义网络）技术会直接或间接影响OTN未来五大发展方向中的三项,具体体现在软件定义传送平面、软件定义控制平面、IP与光跨层协同融合和光网络资源虚拟化四大方面。研究表明,OTN的SDN化将是超100Gbit/s时代的重要发展趋势。

全业务竞争压力使得运营商迫切需要实现网络的FMC（固移融合）。中国联通在ITU-T推动G.metro建议,以应对接入域FMC面临的带宽、生存性和成本等挑战。针对G.metro需求,提出一种具有自愈功能的新型WDM（波分复用）接入环,并进行了性能和生存性验证。结果表明,该接入环成本低、可靠性高。

Copyright of Acta Prataculturae Sinica is the property of Acta Prataculturae Sinica Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Study on Optical Communications / Guangtongxin Yanjiu is the property of Study on Optical Communications Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Acta Prataculturae Sinica is the property of Acta Prataculturae Sinica Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Acta Prataculturae Sinica is the property of Acta Prataculturae Sinica Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Acta Prataculturae Sinica is the property of Acta Prataculturae Sinica Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Study on Optical Communications / Guangtongxin Yanjiu is the property of Study on Optical Communications Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Acta Prataculturae Sinica is the property of Acta Prataculturae Sinica Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Acta Prataculturae Sinica is the property of Acta Prataculturae Sinica Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Acta Prataculturae Sinica is the property of Acta Prataculturae Sinica Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Functional Materials / Gongneng Cailiao is the property of Chongqing Functional Materials Periodical Press and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Southwest China Journal of Agricultural Sciences is the property of Editorial Department of Southwest China Journal of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

By the methods of phenotypic identification and SRAP markers amplif cation, the genetic diversities of fourty wild H. compressa clones from southwest China were assessed and classified. The results showed as follows: The phenotypic variations were rich among H. com pressa clones, and the variation coefficient of the phenotypic traits ranged from 12. 9 % - 57. 0 % . Through the cluster analysis based on phenotypic traits, the clones with obvious genetic differences could be distinguished. The tested 40 H. compressa clones could be clustered into three groups, two cloners( H019 and H054) in A group without earring and flower, two cloners( H002 and H050) in B group with long intemode, long stem, long inflorescence, other 36 clones in C group. After the amplication with 15 pairs of SRAP primers, a total of 314 fragments were detected, among which, 290 fragments were polymorphic, accounting for 92. 4 % of the total. The amplified fragments and polymorphic fragments per pair primer combination were averagely 20. 9 and 19. 0, respectively. Polymorphic information content ( PIC) was from 0. 351 to 0. 499, with average of 0. 443, and the similarity coefficient of 40 accessions ranged from 0. 639 to 0. 949. These results suggested that there was rich genetic diversity among the wild resources of H. compressa clones tested. At the genetic similarity coefficient of 0. 730, the H. compressa clones could be classified into three classes, 36 clones belonged to C class, B class included three clones, namely H050, H052 and H053 , and A class had H029 only. The relationship between morphological and SRAP-based genetic distance wasn ' t significant by mental test. [ABSTRACT FROM AUTHOR]