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1.
本文主要讨论了多协议标签交换MPLS技术在ATM网络实现中的一些特殊问题,例如标签融合问题,标签交换机“孤岛”互联问题等等,并提出了相应的解决方法,对于MPLS的研究与开发有一定的指导与参考价值。  相似文献   

2.
为了实现网络中端到端的可靠传输,在基于TDMA的Ad Hoc网络里引入一种虚电路建立协议.该协议采用分布式的资源预约方式建立虚电路,对于网络拓扑变化所引起的链路故障,能够及时发现和处理,且具有相对较小的开销和较高的可靠性,比较适合Ad Hoc网络.  相似文献   

3.
数据碰撞是影响射频识别(RFID)系统识别效率的主要因素。目前,常用的防碰撞算法是ALOHA算法和二进制树搜索算法,但这两类算法都还不能完全解决标签碰撞问题,尤其是当待识别的标签数量较大且标签ID序列号较长时,识别速度相当慢。为此提出一种多枝查询树协议,采用均衡不完全区组设计(BIBD)对标签ID进行编码,并用16位的BIBD码作为读写器查询前缀符号。理论分析和仿真结果表明,这种协议的性能较传统的防碰撞协议有明显改善。  相似文献   

4.
汪萌  朱文娟 《中国市场》2009,(49):16-19
网格是利用互联网把地理上广泛分布的各种资源(包括计算资源、存储资源、带宽资源、软件资源、数据资源、信息资源、知识资源等)连成一个逻辑整体,就像一台超级计算机一样,为用户提供一体化信息和应用服务。对网格的研究始于美国,纵观网格相关组织的各个网格项目,Globus是最有影响的网格研究计划,其力图实现计算网格结构提供对高性能远程计算资源普遍的、可靠的、一致性的访问。在网格的所有服务当中,对于数据的传输服务处于很重要的地位,一切的存储和计算都需要传输服务的支持。网格环境需要一种快速、安全、有效并可靠的传输机制。网格项目在通盘考虑了当前可用的协议与技术和已经实现的一些原型基础上,确定以FTP协议为基础,并对FTP协议进行了必要的扩展,增加了一些网格计算必要的功能,从而提出了GridFTP协议。在FTP协议的基础上,GridFTP协议及基于其上的工具集为网格数据传输提供了一些其他特征,支持第三方控制的数据传输,支持并行数据传输,支持带状数据传输等。本文重点研究Globus网格平台下的网格数据传输机制,从GridFTP协议的概念、原理、传输功能以及安全性和新的传输机制到其实现,同时对网格的基本概念以及研究所基于的GlobusToolkit4平台进行了介绍。  相似文献   

5.
多协议标签交换的虚拟交换网是一种基于MPLS技术的IP虚拟专用网络(IPVPN).该技术是在网络路由和交换设备上应用MPLS技术。它在一组互联的路由器之间提供了高效的可扩展的交换功能.可用于构造宽带的Intranet、Extranet,满足多种灵活的业务需求。  相似文献   

6.
本文提出一种在无线信道上利用MPLS的标签转发原理建立双向的虚电路的方案。为适应无线的特点,本文对MPLS的相关内容作了一些改动。当建立起虚电路以后每个节点就利用建立好的标签转发表(FTN)转发进入本网的IP数据报。  相似文献   

7.
通过对全球最大的品牌传播公司之一的星传媒体(Starcom MediaVest Group,隶属于法国阳狮集团)全媒介库标签结构及应用的系统介绍,同时结合实际案例对全媒介标签库技术的具体应用进行了阐述,为有效提高传播媒介投放效率与收益提供了具有可操作性的实用方法。  相似文献   

8.
随着射频识别(RFID)技术的广泛应用,隐私安全问题引起了人们的极大关注。首先从安全性和实用性方面讨论了现有的RFID安全协议存在的不足,然后对一种基于动态密钥的低成本RFID标签安全方案进行了分析,较好地解决了在认证协议中容易出现的数据不同步和重传攻击问题。  相似文献   

9.
《现代商业》2005,(4):50-51
2005年3月22日,国内领先的自动识别技术提供商——维深集团和享誉世界最高品牌之一的日本佐藤株式会社(SATO)公司(TSE,交易代号:6287)战略合作伙伴协议签字仪式暨新闻发布会在北京举行,强强联合,共同推进自动识别技术在中国的应用和发展。根据协议,维深集团将成为日本佐藤株式会社(SATO)在中国市场上唯一的本土战略合作伙伴,独家代理SATO公司系列条码标签打印机等主力产品及相应的服务。  相似文献   

10.
<正>国内优秀的自动识别技术提供商——维深集团和享誉世界最高品牌之一的日本佐藤株式会社(SATO)公司战略合作伙伴协议签字仪式暨新闻发布会于2005年3月22日在北京举行,强强联合,共同推进自动识别技术在中国的应用和发展。根据协议,维深集团将成为日本佐藤株式会社(SATO)在中国市场上惟一的本土战略合作伙伴,独家代理SATO公司系列条码标签打印机等主力产品及相应的服务。  相似文献   

11.
12.
《Journal of Retailing》2021,97(3):424-438
Customization of food products has increased substantially in recent years while the desire for healthiness and an emphasis on understanding and providing calorie information continues to dynamically change the landscape of restaurant retail. The authors report four studies demonstrating that different customization routes (i.e., rejecting alternatives from a full product offering versus adding alternatives to a basic product offering) lead to systematic, but predictable, differences in consumers’ estimations of calories. In particular, this research finds that a rejection (vs. selection) customization process leads consumers to persistently estimate lower calories in the final product, which then improves evaluations of the retailer and leads to unhealthier food choices. These findings occur when consumers estimate calories of the exact same final product using the different paths to customization as well as when they create their own customized final product, while accounting for differences in the quantity and type of ingredients selected, suggesting a very general difference in estimations. This research has important implications for consumers who want to manage their weight and for firms that need to manage consumers’ health perceptions.  相似文献   

13.
America's preference for homogeneous, bland-tasting beer may have been largely derived not from an efficient, market-clearing equilibrium, but rather as a result of a series of interesting historical processes and events. The authors argue that the U.S. market may have become locked in a sub-optimal equilibrium in which most consumers are no longer familiar with the full range of what beer is and can be. As a result, most competition in this market concerns advertising campaigns designed to differentiate between increasingly generic beers. Although the concepts of path dependency, switching costs, and lock-in have been employed principally in studies discussing technology standards, these ideas may be usefully extended to consumer branded products, including foods and beverages.  相似文献   

14.
The pursuit of a thriving European “knowledge economy” is hampered by a onedimensional conception of what it is. The authors of the following article conceptualise three types of knowledge society and outline the consequences of this analysis for the leaders of the EU and the Lisbon Agenda. The authors would like to express their gratitude to Gert-Jan Hospers (University of Twente, The Netherlands) for his comments on earlier drafts of this article.  相似文献   

15.
Today's consumers are immersed in a vast and complex array of networks. Each network features an interconnected mesh of people and firms, and now, with the rise of the Internet of Things (IoT), also objects. Technology (particularly mobile devices) enables such connections, and facilitates many kinds of interactions in these networks—from transactions, to social information sharing, to people interfacing with connected devices (e.g., wearable technology).We introduce the POP-framework, discuss how People, Objects and the Physical world inter-connect with each other and how it results in an increasing amount of connected data, and briefly summarize existing knowledge on these inter-connections. We also provide an agenda for future research focused on examining potential impact of IoT and smart products on consumer behavior and firm strategies.  相似文献   

16.
This research examines the effects of the establishment mode of foreign subsidiaries (greenfield vs acquisition) on the type of network relationships (social vs business) they develop in local markets. The authors use the network approach to better understand the role played by local subsidiaries for the development of networks in multinational enterprises. The empirical study is based on a dataset covering 120 foreign-owned subsidiaries in Italy. The findings show that acquired subsidiaries are more directly involved in business relationships, whereas greenfield subsidiaries pay more attention to social relationships before building business networks. The establishment mode thus affects the type of network relationships developed by local subsidiaries, which can help them to overcome the liabilities of foreignness and outsidership.  相似文献   

17.
The significant growth of Private Labels (PLs) has led to a growing competition between National Brand (NB) manufacturers, on the one hand, and retailers, on the other; while manufacturers strive to achieve enhanced customer loyalty through such measures as innovation and advertising, retailers focus their efforts on offering high-quality products. This paper considers for the first time a supply chain consisting of one NB manufacturer and a population of retailers under two scenarios. In the first, each retailer sells NB and chooses either to introduce an Economy Private Label (EPL) or not. In the second scenario, each retailer chooses either to introduce a Premium Private Label (PPL) or not. To solve the problem, an evolutionary game is introduced and the retailers’ behavior is analyzed. Using two numerical examples, parametric analysis and managerial insights are also provided. It is found that the entire population chooses the strategy of introducing a private label (EPL or PPL) and that this strategy yields greater profits for both the manufacturer and the retailers than other strategy profiles might do. In addition, it is shown that both the retailers and the manufacturer gain more profits by introducing a PPL rather than an EPL.  相似文献   

18.
Large numbers of traffic accidents were experienced on the road networks of Arab Gulf Countries including United Arab Emirates (UAE). This had resulted in enormous loss of lives and economy. This article through using Abu Dhabi city, UAE capital as a case study is aiming to understand the reasons behind such safety problem through analysing a large accidents data-set extending over the period from 2008 to 2013. The traffic accidents data-set was obtained from Abu Dhabi traffic police department records and covers wide range of accident's attributes. A wide spectrum of accident attributes was analysed in the paper including but not limited to the time of accident, accident location, type of accident, reasons behind the accident, driver characteristics, road conditions, and many other accident attributes. A specific reasoning for each of these attributes was given by authors. Furthermore, recommendations to enhance the safety levels were introduced.  相似文献   

19.
高效、安全的路由机制是保证无线网状网络(WMN)正常工作的一个重要因素。对WMN中的多径路由(MPR)算法进行了研究。由于MPR算法存在路由分离性约束,提出了一种基于转移概率的随机路由(SR)算法,并对这两种算法进行了仿真。仿真结果表明:在节点转发次数的标准方差和最高截获率两个性能指标方面,SR算法均优于MPR算法,这说明与MPR算法相比,所提算法进一步增强了WMN网络的路由安全性。  相似文献   

20.
随着高强度绝缘绳的出现,利用铁塔作为支撑体的无跨越架不停电封网跨越技术得到了推广应用。本文结合工程实例针对该类施工过程中监理需在现场着重控制点进行了论述。  相似文献   

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