面向企业客户市场的电信价值链整合

伴随着“移动梦网”、“互联星空”等的出现,旨在广泛利用社会资源以形成新价值链的电信价值链整合成为电信业界共同关注的热门话题,产业联盟、生态圈、宽带价值链等层出不穷的新名词也吸引着众多的眼球。毫无疑问,以“移动梦网”为代表的电信价值链整合获得了很大程度的成功,这一点从其构建的交易平台的用户人数、参与的SP个数、交易次数和成交金额,还有对基础电信业务的拉动及客户满意度、忠诚度的全面提升等各个方面可以得到验证。事实胜于雄辩,电信价值链整合是正确和有益的,在以后的发展中也必将进行下去,将会有更多的运作模式、业务形态被创造和激活。但目前电信价值链整合的尝试都是在公众客户市场中,那么在同样具有巨大商业价值和开发潜力的企业客户市场,电信营运商可否进行类似的整合,实现赢利模式的创新,从而推出具有市场前景的新应用、新服务,进而形成竞争优势呢?     

原子力显微术轻敲模式中探针样品接触过程及相位衬度研究

借助简单的有阻尼受迫振子模型，研究了原子力显微术轻敲模式中探针与样品接触时间t_c、样品的表面形变D_z和相位衬度对探针设置高度z_c及样品杨氏模量E_s的依赖关系.结果发现,t_c与D_z均随E_s及z_c的增大而减小，同时探针与样品作用过程伴随很小的能量耗散.对轻敲过程中相移量φ的研究表明，E_s较大的样品有较小的φ，且φ随 关键词： 原子力显微术 轻敲模式 相位衬度     

一种新型有机电致微腔结构的双模发射

采用结构Glass／DBR／ITO／NPB／NPB：Alq／Alq／Al制作了有机微腔电致发光器件。将空穴传输材料与发光材料以一定比例混合作为发光层，为了便于对比，在不改变有机层的膜厚的情况下同时制作了传统的异质结微腔器件，发现两种器件的发光光谱有很大不同，器件的复合效率与传统的异质结器件相比也得到了很大提高，这是因为将两种有机材料混合能消除界面势垒，提高器件的复合效率，从而提高了器件的发光性能，实现了微腔双模发射，且两个模式的半峰全宽分别为8nm和12nm。通过进一步优化器件结构可以实现微腔白光发射。     

Raman Spectra of Proton-Exchanged LiNbO3 Optical Waveguides

Based on the Raman spectrum measurement, we investigate the mechanism of proton exchange, by which the optical waveguides are formed in the LiNbO3 crystal which are proton doped. The proton source is formed by a mixture of benzoic and adipic acids. The experimental results show that there is a Raman formant peak of optical waveguide at 650cm^-1, and the higher the relative percentage of the mol ratio of adipic acid dilution, the higher the intensity of the Raman formant peak.     

An approach to the detection of underwater remote target

An approach to the detection of underwater remote target by estimating its backscattering coefficient is presented. The key to this approach is that the echo signal is represented in state-variable model and the back-scattering coefficients of target are contained in dynamic noise of this model, thus underwater target can be detected by estimating this dynamic noise, i.e., deconvolving this model. When all noise statistics are a priori known, an optimum deconvolution algorithm based on the optimum state filter is derived, or else, an adaptive deconvolution algorithm based on the adaptive state filter of alternatively estimating the vector state and the noise statistics is developed. In the final simulation test, an echo signal with SNR equal to -6.1 dB is proceeded using the aforementioned two deconvolution algorithms, respectively, and the results demonstrate good performance of the approach.     

Supercontinuum Generation in a Photonic Crystal Fibre

Nearly 1000-nm broad continuum from 390 nm to 1370 nm is generated in a 2-m long photonic crystal fibre. The maximum total power of supercontinuum is measured to be 60mW with the pumping power of 800mW output from a 200-fs Ti:sapphire laser. The evolution of the pumping light into supercontinuum is experimentally studied in detail. It is found that the mechanism for supercontinuum generation has direct relations with Raman effect and soliton effect, and the four-wave mixing plays an important role in the last phase of the supercontinuum generation.     

Auger图示对锰原子共振结构的影响

使用多体微扰理论(many-body perturbation theory，MBPT)计算了锰原子的3p^63d^54s^2→3p^53d^54s^2nd系列里德堡共振结构。在耦合方程方法中考虑了Auger图式，计算表明，Auger图式有效地抑制了3p→nd系列共振结构的发散。     

立于软件产业高度的连邦

早在130年前,连锁经营就已在发达国家兴起,连锁经营的市场份额占全球零售市场的30％。时至今日,我国也已有150多家连锁公司,2500多个连锁网点。然而,将连锁经营模式引入软件行业,连邦首开先河。这标志着我国软件行业的发展已出现更为细致的内部分工,软件流通已经成为一种新兴而专门的行业。继连邦之后,赛乐氏紧随其后,雄心勃勃,今年计划将连锁店发展到70家。而以制作游戏著称的北京前导软件有限公司日前也宣布成立前导软件连锁组织,专门进行游戏的连锁销售。可以说,软件连锁销售方式在国内市场的崛起,实际上是一场软件领域的流通革命,它推动了中国软件产业的健康成长和高速发展。本刊将分三期分别介绍连邦、赛乐氏和前导这三家具有代表性的软件连锁销售组织,以期通过它们,使读者对我国软件的连锁销售有一比较全面的了解。     

帧中继技术及其应用

本文介绍帧中继（ＦＲ）技术的特点，以及帧中继的应用和发展趋势、帧中继与ＡＴＭ骨干网互连的方法。