共查询到20条相似文献,搜索用时 171 毫秒
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本文主要探讨了共用物流信息平台中的两方面的关键技术:平台的通信网络和平台的安全性能设计技术.在平台的通信网络技术的探讨中,本文主要从目前的有线通信和无线通信的分析比较入手,据此得出平台通信方式选择原则;平台的安全性能设计中,本文探讨了平台的网络防病毒技术、防火墙技术、数据加密技术以及身份验证技术. 相似文献
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随着软件无线电技术的快速发展和实践应用,原本数量众多且种类多样的美军军用卫星
通信终端也即将迎来更新换代和整合。在介绍美三军最新一代卫星通信终端研制现状的基础
上,研究了美军新一代卫星通信终端发展的特点,分析了美军卫星通信终端的未来发展趋势
,总结了从中获得的启示。 相似文献
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通过对民航ACARS数据链通信系统物理层的深入研究,采用通用信号处理开发平台,设计
开发了DSB-AM/MSK调制解调器,引入CSMA忙闲检测及信道质量检测机制,结合实际
工程应用,实现了与国际民航电台的可靠互通,为民航ACARS通信系统的自主工程研制奠定
了基础。 相似文献
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Pan Guanghua 《国际商务研究》1990,(5)
航空卫星通信最近发展较快,其原因是航线增加、航路拥挤.为了保证飞行安全,提高航运效率,为旅客提供优质的服务,许多国家的民航公司都想尽早应用卫星通信.本文介绍民用航空卫星通信的现状与未来发展趋势,并阐述实现卫星通信必须解决的一些关键技术. 相似文献
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卫星通信以其独特的技术优势,已成为现代通信传输的重要手段之一,然而由于卫星通信系统的开放性,也决定了其易受到干扰的特性,本文总结了卫星通信系统常见的干扰,以及常见干扰的判断方法和应对措施” 相似文献
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Kim Willems Gilbert Swinnen 《International Review of Retail, Distribution & Consumer Research》2013,23(5):513-539
This study examines whether consumer perceptions of store personality (SP) differ according to the store's format (hard-discount versus soft-discount and value retailing). A consumer survey (n?=?306) is conducted in which respondents are asked to rate these retail formats on five SP dimensions and in terms of self-congruity (SC). The findings of both repeated measures ANOVA and hypothesis testing of proportion difference indicate that the three formats differ significantly in terms of all five SP dimensions. Moreover, consumers perceive a greater match between their self-concept and the value retailer's personality than the discounter's. A PLS model is estimated linking SP and SC to store loyalty and word-of-mouth intentions (WOM). The SP measurement model is only partially confirmed by the data. The effect of SC is found to dominate in explaining loyalty and WOM. These results provide valuable insights for optimising retail positioning strategies. 相似文献
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Two new methods for estimating structural equation models: An illustration and a comparison with two established methods 总被引:1,自引:0,他引:1
Irene R.R. Lu 《International Journal of Research in Marketing》2011,28(3):258-268
The application of structural equation models (SEMs) is common in marketing and the behavioral sciences. Accordingly, the exploration of more effective methods to estimate SEMs is also a popular area of research.
[Croon, 2002] and [Skrondal and Laake, 2001] have each proposed a new method for estimating SEMs, but since these proposals nearly a decade ago, these methods have been mostly overlooked by applied researchers. We suggest that reasons for this oversight may include not only a lack of guidance in implementing these new methods but also the absence of a formal comparison to review these new methods relative to the more familiar maximum likelihood structural equation modeling (MLSEM) and partial least squares (PLS). In this paper, our goal was to make the Croon and Skrondal-Laake (SL) methods more accessible to applied researchers. We first provide a step-by-step illustration of how to implement the Croon and SL methods. We also present the first comprehensive evaluation of the new methods relative to MLSEM and PLS. From this evaluation, we can better appreciate the circumstances under which these new methods are preferable to MLSEM and PLS. Thus, we intend to help readers understand how and when to apply these new methods. 相似文献
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服务链概念、模型及其应用 总被引:19,自引:0,他引:19
对服务链的特点、分类、模型以及服务链与供应链、客户链和需求链之间的关系作了全面和深入 的分析与研究。指出服务链是解决企业为消费者提供全方位、全过程、全时间服务问题的最有效方法。 以汽车消费服务为例,对服务链的应用作了阐述。 相似文献
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主要客户和主要供应商交易比例这两项年度报告指标分别反映了上市公司销售供应链和采购供应链的集成度,通过聚类法可分析上市公司供应链集成度的高低。聚类结果和相关案例表明,少数上市公司有较高供应链集成度并达到较高的供应链管理水平,但多数上市公司供应链集成度仍然较低。 相似文献
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在移动通信中,分集技术是一种最有效的抗衰落技术。本文对3种常见的线性合并分集技术进行简要分析,给出它们的基带表示和合并器输出信噪比的概率密度函数(pdf),由此给出它们的合并增益。针对系统采用MPSK调制的情况,对瑞利衰落信道的3种合并分集系统的比特误码率(BER)性能进行理论研究,分别给出选择性合并(SC)和最大比率合并(MRC)系统的理论比特误码率表达式;对于等增益合并(EGC)分集,给出了一种近似的EGC系统的输出信噪比的pdf,由此导出EGC的一种近似的BER表达式,由蒙特卡罗仿真结果可以看出此近似的BER数值结果是准确的。数值结果显示:MRC性能最好,EGC性能稍差,而SC性能较差。文中给出的分析方法对于实际分集系统的理论研究具有普遍的指导意义。 相似文献
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零售企业主导型供应链的管理特征研究 总被引:7,自引:0,他引:7
在零售企业主导型供应链中,大型零售企业凭借其资金、信息、渠道等优势,对整个供应链的运营和管理拥有主导权,成为整个供应链网络的协调中心。由于零售企业主导型供应链呈现的结构特点,这一类供应链的管理与制造企业主导型供应链管理在核心内容和管理方法上都有很大的不同,本文对此进行了初步研究并提出了若干观点。 相似文献
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The interest conflict is an important factor affecting the supply chain (SC) performance, so it is very important to set up a reasonable coordination mechanism to eliminate the SC conflicts. Considering the fact that suppliers' effort performance level and fairness concern behavior are important factors affecting SC performance, we can develop SC models to analyze and compare SC decisions under the centralized decision and decentralized decision, and then we design a SC coordination mechanism through cost sharing. The results show that the designed coordination mechanism can effectively solve the conflict problem of SC, mobilize SC members’ motivation and initiative without damaging their profits, and realize the long-term cooperation between the retailer and multi-suppliers. It also can achieve the Pareto improvement and the sustainable development of SC. 相似文献