无线宽带通信发展对西部社会经济影响的综合评价体系构建

全球通信向宽带化、无线化、个人化及分组化趋势发展,无线宽带代表最新的发展趋势.宽带移动化和移动宽带化正成为无线宽带通信发展的两个主要方向.文章从经济和社会两个角度分析无线宽带通信发展对西部的影响,建立影响因素图,并进一步构建综合评价指标体系及评价模型.     

宽带接入技术探讨

接入网面临从窄带到宽带,从电路方式到分组方式转型,本文从接入路径和接入技术方 面,提出了对发展宽带接入网的一些认识和看法.     

宽带网的带宽及传输技术

从模拟条件下定义的“宽带”入手,利用付里叶级数和付氏变换这一工具,说明数字通信中用到的宽带的含义指的是数据的传输速率同时利用仙农定理进一步说明信道宽带与速率的区别和联系.也论述了构成网络的几个主要部分入手,从宏观上指出了宽带网的传输途径.     

实现宽带共享INTERNET的方法

当前宽带共享上网有多种方法，从中可以选择适合自己的上网方式。     

The Continuing Digital Divide in the United States

Mapping the digital divide in America is a multifaceted issue; however, the influence of underlying socioeconomic causes, the shift in the conversation to new divides including broadband accessibility and digital literacy, and the importance of the library in narrowing the divide are all prominent points of focus in the literature today. As conversations surrounding the digital divide begin to shift from a divide in access to a divide in skills and/or literacy, attention must be drawn to meeting those needs in equal measure to maintaining access as the primary means of closing the digital divide in America.     

中小型高新技术企业薪酬管理问题与对策

以Z公司基于宽带薪酬机制的薪酬体系改革为切入点,详细分析了我国中小型高新技术企业薪酬管理中存在的问题并提出了相应对策。运用宽带薪酬体系的中小型高新技术企业更能提高人力资本效能,增强公司整体绩效,削弱工资向上刚性,提升公司市场竞争力。     

基于时延抽头模型的宽带信号方位谱估计

讨论了均匀圆阵中宽带信号的谱估计问题.将目标带宽分成若干个不重叠的子频带,并将时延抽头模型方法用于均匀圆阵宽带信号的采集中,然后用MUSIC算法估计信号的来波方向.仿真结果表明该方法的有效性.     

模块化掺饵光纤宽带光源驱动电路设计

为了提高模块化宽带光源的稳定性,采用自动温度控制ATC电路和自动功率控制APC电路驱动泵浦激光器。实验结果表明,光源驱动电路可靠,输出光谱和光功率稳定,达到了预定的技术指标要求。该电路集成度高、体积小,能够满足宽带光源模块化需求。     

金属管道探测无缆微机器人无线供电系统的设计

设计一个金属管道中无缆探测微机器人微波供电系统,系统利用微波在圆波导中的传输基本原理,解决微波在工业不锈钢管道（直径20 mm）传输中的极化和能量传输的不稳定性问题.管道中微机器人供电单元——整流天线接收微波能量并转换成直流作为其电源,接收天线采用圆极化微带贴片天线,整流电路采用倍压电路以提高输出功率,最终试验测得在24.5 dBm输入功率下（直流负载为300Ω）,整流输出86.8 mW直流功率,能够保证机器人驱动电机正常工作。     

Understanding the Role of ICT Networks in a Biotechnology Cluster: An Exploratory Study of Medicon Valley

Based on a wide-ranging literature review, we argue that the information and communications technology (ICT) infrastructure has not received adequate attention for its role in the development and maintenance of industrial clusters. This article develops expectations for how firms in an industrial cluster make use of a public, broadband ICT infrastructure, particularly in support of e-commerce applications. We further address the question of whether ICT use, by enabling stronger ties to non-cluster partners, can weaken clusters. A case study of a successful biotechnology cluster in Denmark and Sweden—the Medicon Valley—is used to explore ICT use in a knowledge-intensive cluster context. We conclude that ICT use appears to strengthen rather than weaken the Medicon Valley cluster, and that firms located within a cluster appear to gain some unique advantages from their ICT usage that are not necessarily available to firms outside the cluster.