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ABSTRACTDue to the advances in medical technology, popularity of education, and increase of public self-consciousness. The World Health Organization (WHO) has promoted the use of e-health tools. The digitalization of patients’ personal health records enables doctors to review parients’ complete medical records and enhance medical efficiency. A personal health record system is established in the cloud to achieve these above goals.Therefore, the aim of this study is to construct an authority management mechanism by incorporating bilinear pairing and time-constraint. The proposed scheme will ensure that an authorized medical personnel can obtain an decryption key only in the legal time interval. 相似文献
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针对协同问答模式下无线电信号配对关系分析的需求,提出了一种基于信号时间序列匹配的询问应答信号配对方法。该方法提取侦察传感器获取的信号模式、到达时间、节点位置等参数,反向推算信号发射时间序列,通过时序匹配算法对询问和应答信号进行准确配对,从而提取节点间问答关系。计算机仿真验证了方法的有效性,在一定的条件下配对正确率超过95%。 相似文献
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本文运用微观经济学方法分析了引发热议的两种搭售现象--公路年票与天价月饼中的厂商行为与福利效应,创立了"伪搭售"这一概念以及在二维平面图中分析两种商品组合的消费者剩余与生产者剩余的图示法. 相似文献
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Chang-Dae Ham 《国际广告杂志》2013,32(2):327-349
This study explores the personality of Internet media and develops a multidimensional measurement scale to assess personality across diverse entities, including social networking sites, search engines, portals, and shopping sites. Through a series of qualitative and quantitative methods, including exploratory factor analysis and confirmatory factor analysis, the present study identifies a set of 30 personality traits that represent five unique dimensions of Internet media personality: Intelligent, Amusing, Convenient, Sociable, and Confusing. This study found that different pairs of brand and Internet media personality dimensions yield different effects on attitude toward advertising brands. Practical implications for marketers and advertisers, as well as theoretical implications for advertising researchers, are discussed. 相似文献
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第三代合作伙伴计划(3GPP)在长期演进(LTE)上行传输中引入了虚拟多输入多输出(V-MIMO)技术,能够提升频谱效率,改善无线链路传输性能。用户配对是V-MIMO技术必不可少的环节。针对现有的正交配对算法由于不能准确衡量两用户的正交性而导致的性能恶化问题进行了理论分析,并提出更具有一般性的正交性定义。为适应LTE-Advanced上行最大支持4流、下行最大支持8流的特点,结合贪婪思想将正交配对的应用情形由两用户推广至多用户。为了进一步改善系统性能,提出基于范数的贪婪正交配对算法。仿真结果与复杂度分析表明,基于范数的贪婪正交配对算法与穷举的最优算法性能接近,且在计算复杂度上要远低于最优算法,对于V-MIMO技术的发展具有重要意义。 相似文献
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