排序方式: 共有49条查询结果,搜索用时 15 毫秒
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试论电信业与传媒业的融合与结构转型 总被引:3,自引:0,他引:3
本文论述了电信业和传媒业如何融合为大传媒产业,以及大媒体产业的形成对我国产业结构转型产生的多方面影响。 相似文献
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Anthony G. Wilhelm 《The Information Society》2003,19(4):279-286
Bridging the digital divide between information and technology haves and have-nots has waned from the top of the national policy agenda in the United States during a time in which the sunken investments of the 1990s need to be leveraged. A national information network now exists yet this infrastructure--largely hardware--needs to be continually modernized and parlayed with commitments to building human capacity, developing relevant content, and scaling socially beneficial technology applications, such as telemedicine, in order to optimize these initial multi-billion-dollar outlays. This article makes the case that sidestepping public-private initiatives aimed at accelerating digital opportunity is imprudent, given the mounting empirical evidence highlighting the payoffs of information and communications technologies, when properly integrated and applied, especially in enhancing the life chances of underserved Americans. Policy next steps should advance the goals of expanding universal service initiatives, including hastening broadband deployment to homes and learning institutions, and deepening programs which leverage the utility of the existing infrastructure, such as expanding human-capital development, producing relevant content, and innovating socially beneficial technology applications. 相似文献
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论述了建设传输综合网管的必要性,在系统分析传输综合网络管理系统的难点,提出了切合实际解决方案;综合考虑上海电信实际现状,从建设目标、系统架构等方面制定了传输综合网管的技术路线并成功部署了该系统。 相似文献
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Tomoko Kanayama 《The Information Society》2003,19(2):185-194
This article examines whether Section 255 of the 1996 Telecommunications Act achieves accessibility for people with disabilities. Taking the interest group approach, it shows that the Federal Communications Commission (FCC) implemented Section 255 in a way that is favorable to the telecommunications industry and not to people with disabilities. The FCC's regulations only encourage the telecommunication industry to consider accessibility issues for people with disabilities. This proindustry regulatory bias is in keeping with the established pattern of policymaking in other areas concerning people with disabilities. The paper argues that if the FCC continues to rely on the voluntary efforts of the industry, people with disabilities will not enjoy benefits of access to telecommunications systems. 相似文献
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In this paper, we address the issue of sparse signal recovery in wireless sensor networks (WSNs) based on Bayesian learning. We first formulate a compressed sensing (CS)-based signal recovery problem for the detection of sparse event in WSNs. Then, from the perspective of energy saving and communication overhead reduction of the WSNs, we develop an optimal sensor selection algorithm by employing a lower-bound of the mean square error (MSE) for the MMSE estimator. To tackle the nonconvex difficulty of the optimum sensor selection problem, a convex relaxation is introduced to achieve a suboptimal solution. Both uncorrelated and correlated noises are considered and a low-complexity realization of the sensor selection algorithm is also suggested. Based on the selected subset of sensors, the sparse Bayesian learning (SBL) is utilized to reconstruct the sparse signal. Simulation results illustrate that our proposed approaches lead to a superior performance over the reference methods in comparison. 相似文献
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移动流媒体业务在3G通信时代的应用 总被引:1,自引:0,他引:1
在3G的发展进程中,移动流媒体业务是其中最重要的一项。介绍了流媒体技术,分析了移动流媒体业务发展中存在的问题,提出了解决问题的办法。 相似文献