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目的:本文通过对客观记录的受试者脑电图数据进行Bayes判别分析,判断其能否应用于脑电数据特征提取和分类决策。为脑电图研究的其它分析做基础分析。方法:根据α波的强弱不同将21导电极分为四类,分别对63例正常状态下受试者21导联电极的脑电图数据进行Bayes判别分析,并利用误判率回代估计法检验判别准确率。数据处理和统计分析采用独立设计的脑电图分析工具箱和Bayes判别分析程序。结果:表明对63例正常状态下受试者的脑电图数据进行Bayes判别分析,预测各电极分类准确率75.4%。结论:Bayes判别法预测准确率较高,脑电特征(主要为α波)提取较为准确,能较好的应用于脑电数据特征提取和分类决策中,从而辅助脑电图的检查和定量分析,为脑电图的检验提供有效的分析手段。 相似文献
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This work presents the participation factor and the valuation of a first-generation structured product with European call options on the Eurostoxx, when the uncertainty of the yields is modeled through log-stable processes. The basic statistics of the index yields are also exposed, the α-stable parameters are estimated, and the valuation of the of the structured models is compared through the log-stable and log-Gaussian models using inputs from the bond markets; concluding that investors obtain higher yields than those of the bond market through both models, and that the differences of the yields depend on the participation factor and on the value of the index at the time of liquidation. 相似文献
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针时统计数据缺乏的预测问题,提出引入灰色系统理论来解决,以连云港2003—2007年港口吞吐量的数据为基础建立了非线性灰色GM(1,1,α)模型,详细阐述了灰色预测法的应用过程。结果表明,非线性灰色模型对样本的适应性强,预测精度高,简单易行,能够有效解决港口吞吐量预测问题。 相似文献
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Fuzziness in a fuzzy set is determined by its membership function (m.f) which translates the reality of a problem. Accordingly, the shapes of membership functions (m.fs) are important for a particular problem such as poverty since they effect on a fuzzy inference system. Some authors have used to visualize the behaviour of poverty, different shapes like triangular, trapezoidal. In this paper, a specific (m.f), named modified logistic membership function better illustrating the complicated reality, is proposed to measure poverty. The modified logistic membership function is first formulated for several states of poverty and its flexibility in taking up vagueness in poverty is established by an analytical approach using aggregate operators in order to infer a logical conclusion measuring poverty. An application based on individual well-being data from Tunisian households in 2010 is presented to illustrate use of proposed concepts. 相似文献
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目的探讨LEEP刀联合α-干扰素栓治疗宫颈糜烂的临床疗效及优越性。方法将96例宫颈糜烂患者分为观察组(54例)和对照组(42例),对照组给予LEEP治疗,观察组给予LEEP联合α-干扰素治疗,观察两组患者治疗效果。结果观察组术后出血持续时间、创面愈合时间均明显早于对照组(P<0.05);观察组治疗总有效率为98.15%,明显高于对照组的80.95%(P<0.05)。结论 LEEP联合α-干扰素栓治疗宫颈糜烂疗效好、恢复快,值得临床推广应用。 相似文献
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目的:本文通过对客观记录的受试者脑电图数据进行马氏距离判别分析,判断其能否应用于脑电数据特征提取和分类决策。为脑电图研究的其它分析做基础分析。方法:根据α波的强弱不同将21导电极分为四类,分别对63例正常状态下受试者21导联电极的脑电图数据进行马氏距离判别分析,并利用误判率回代估计法检验判别准确率。数据处理和统计分析采用独立设计的脑电图分析工具箱和马氏距离判别分析程序。结果:表明对63例正常状态下受试者的脑电图数据进行马氏距离判别分析,预测各电极分类准确率84.4%。结论:马氏判别法预测准确率较高,脑电特征(主要为α波)提取较为准确,能较好的应用于脑电数据特征提取和分类决策中,从而辅助脑电图的检查和定量分析,为脑电图的检验提供有效的分析手段。 相似文献
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We report the participation level, we pricing a first generation's European call options on the Eurostoxx structured product, when returns’ uncertainty is modeled by log-stable processes, we present the basic statistics of the index's returns, we estimate the α-estable parameters, and we compare the structured products pricing by the both log-stable and log-Gaussian models using inputs of the debt markets. We conclude that investors get higher returns than debt markets using both models and returns’ differences depend of the participation level and the maturity. 相似文献
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引进了局部(α,β,γ)-对角占优矩阵的相关概念,在不可约局部(α,β,γ)-对角占优矩阵的条件下,获得了非奇异H-矩阵及非奇异M-矩阵的实用判别准则,推广了已有的相关结果。 相似文献
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