基于负载平衡的无线传感器网络路由算法

为了提高无线传感器网络的能量利用率和延长网络的生命周期,本文提出了基于负载平衡的无线传感器网络路由算法。首先,将网络划分成多个网格,根据网格内节点的负载情况定义网格的状态,结合网格的地理位置和网格负载状态选择路由网格;其次,根据节点剩余能量和负载大小在选择的网格内选取一个合适的节点开始数据的收发工作;最后,通过模拟实验将本文算法与GPSR算法和GEAR算法进行比较。仿真结果表明,该算法有效改善了网络的负载均衡,延长了网络的生存期,并提高了网络的吞吐量。     

基于无线网络技术的职教师资移动教育平台研究

随着无线移动通讯技术的快速发展及移动设备的交替更新,移动教育便捷有效地解决了职业教育中教师队伍力量薄弱、培训时间和空间不确定、培训内容特殊、培训方式单一等困难。本文针对职教师资培训的特色,将移动教育引入培训中,构建基于无线网络技术的移动教育平台,促进职教师资培训的成效。     

The evolution of innovation capability in multinational enterprise subsidiaries: Dual network embeddedness and the divergence of subsidiary specialisation in Taiwan

This paper examines how innovation-related capabilities for production, design and marketing develop at the subsidiary level within multinational enterprises (MNEs). We focus on how subsidiary autonomy and changing opportunities to access external (host country) sources of capability contribute to the accumulation of specialist capabilities in five Taiwan-based MNE subsidiaries in the semiconductor industry. Longitudinal analysis shows how the accumulation process is subject to discontinuities, as functional divisions are (re)opened and closed during the lifetime of the subsidiary. A composite set of innovation output measures also shows significant variations in within-function levels of capability across our sample. We conclude that subsidiary specialisation and unique subsidiary-specific advantages have evolved in a way that is strongly influenced by the above factors.     

Say Goodbye…Let's Roll: The Social Dynamics of Wireless Networks on September 11

This article describes the use of wireless telecommunication media within the different locations directly affected by the hijackings on September 11. Comparisons across these different contexts provides an empirical anchor to more general themes concerning the social dynamics of wireless in the unfolding events of this day. An indication is given of how the important social role of wireless phones in this crisis could redefine public views on wireless media and thereby shape policy and regulation in the years ahead.     

The Crisis of communication: Videotext,the internet and innovation in France and the United States

This article compares videotext in France and the United States, the two advanced industrialized countries where videotext was the most and least successful, respectively, in order to demonstrate how videotext as a techno-political project foreshadows the explosive growth of the Internet as the dominant global communications platform. It draws upon the theory of network effects, in combination with a comparative analysis of both the institutional settings for research and development and political discourse, to explain how the interaction between state, market, and culture shaped network development and policy outcomes. Data are drawn primarily from official policy documents and trade journals from the era.     

基于分布式聚合RSS的文件传输技术研究

针对在无线网络中传输大规模数据时存在出错率高等问题,提出了一种基于改进型RSS算法的高效率文件传输算法。该技术基于分布式无线通信模式,服务器端建立基于Feed的分布式文件传输架构,通过协作通信的方式向客户端广播RSS更新消息,在无线文件传输控制信息的端到端时延和网络吞吐率上进行优化。实验表明所提出的技术与原RSS技术相比在无线文件传输的可靠性、实时性、资源利用率等方面具有良好的性能。     

基于贝叶斯网络的人力资源管理模型

贝叶斯网络(Bayesian Networks)是人工智能和数据挖掘领域中对不确定性问题进行推理和数据分析的一种工具,贝叶斯网络在人力资源中的应用也非常广,基于贝叶斯网络,分析人力资源管理中的主要因素,提出人力资源管理的贝叶斯网络构造方法,构建贝叶斯网络模型。     

基于链路层切换技术的网络层快速切换方法

提出了一种新的网络层快速切换方法,该方法在链路层同步转发切换方法的基础上通过增加两个网络层切换实体来实现网络层快速切换,实现了IP移动检测的零时延。仿真结果表明,该基于链路层切换技术的网络层快速切换能够减少结点在子网间切换带来的时延,从而满足了实时应用的要求。     

Can intermunicipal collaboration help the diffusion of E-Government in peripheral areas? Evidence from Italy

This paper analyzes the implementation of new intermunicipal structures in Italy to support the development of E-Government in the country's peripheral areas. Our exploratory case study, conducted in the Piedmont Region, shows that intermunicipal collaborations can facilitate the coordination of interdependent subjects, rationalize existing resources (e.g., through the reuse of application software solutions), and prevent the dispersion of federal government funds. Nevertheless, intermunicipal collaborations alone do not seem to have the power needed to ensure that decisions made at the central level will automatically translate into concrete and binding commitments for the municipalities involved. From a methodological standpoint, the article makes use of the analytical frameworks offered by organization science to interpret the effects of collaborative arrangements on E-Government implementation.     

Strengthening Agricultural Education and Training in sub-Saharan Africa from an Innovation Systems Perspective: A Case Study of Mozambique

Abstract

This paper examines how post-secondary agricultural education and training (AET) in sub-Saharan Africa can contribute to agricultural development by strengthening the capacity to innovate—to introduce new products and processes that are socially or economically relevant to smallholder farmers and other agents. Using the AET system in Mozambique as a case study, this paper examines the role of AET within the context of an agricultural innovation system. This innovation systems perspective offers an analytical framework to examine technological change in agriculture as a complex process of interactions among diverse actors who generate, exchange, and use knowledge, conditioned by complex social and economic institutions. The paper argues that while AET is conventionally viewed as key to the development of human capital, it also has a vital role to play in building the capacity of organizations and individuals to transmit and adapt information, products and processes, and new organizational cultures and behaviors. The paper emphasizes the importance of improving AET systems by strengthening the capabilities of organizations and professionals; changing organizational cultures, behaviors, and incentives; and building innovation networks and linkages. The paper offers several recommendations to enhance the effectiveness of AET for agricultural innovation and development. Key reforms include aligning the mandates of AET organizations with national development aspirations; inducing change in the cultures of AET organizations through the introduction of educational programs and linkages beyond the AET system; and enhancing innovative individual and organizational capacity by improving incentives to forge stronger links between AET and other stakeholders.