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信息比率
相关语句
  information ratio
     Information Ratio and Empirical Study of Security Funds Performance Evaluation
     信息比率及其在基金绩效评价中的应用
短句来源
     It demonstrates the connectionbetween an information ratio and a sharp ratio, designates the applying conditions andchoosing tenets of differential composite performance evaluation methods.
     文章论证了信息比率与夏普比率之间的关系,指明了不同合并表现评价方法的适用条件和选择原则。
短句来源
     Information ratio is a powerful tool for security investment funds performance evaluation.
     信息比率是证券投资基金绩效评价的一种得力工具 .
短句来源
     This article introduces the calculating methods and meanings of information ratio, studies the relationship between information ratio and Sharp ratio, analyzes the connection existing between the statistical significance of excess returns and an information ratio, and points out some questions should be warned when evaluating security investment funds performance by information ratio.
     介绍了信息比率的计算方法 ,解释了信息比率的含义 ,研究了信息比率与夏普比率之间的关系 ,分析了超额收益率统计显著性检验与信息比率统计显著性之间的联系 ,指出了利用信息比率进行基金绩效评价时需要注意的事项 .
短句来源
  相似匹配句对
     Information model of construction machinery CAID
     信息
短句来源
     information and benefit.
     信息
短句来源
     Information Ratio and Empirical Study of Security Funds Performance Evaluation
     信息比率及其在基金绩效评价中的应用
短句来源
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  information ratio
Numerical simulations reveal that the portfolio rankings produced with this measure are more precise and more stable than the ones provided by Jensen's alpha and the Information Ratio.
      
The Bayesian regression procedure is similar to weighted least square in that it uses an information ratio to weight the priors.
      
A fund that had the same excess return and 400 basis points of tracking error would have an information ratio of 0.25.
      
A central measurement for active management, value added is propor tional to the square of the information ratio.
      
All too often, the best simulated information ratio depends on one or two strings of truly exceptional performance.
      
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The 15 characters were surveyed for 50 local pepper varieties. The 15 characters were classified as 5 groups: fruit yield per plant (PFY), fruit character (FYC), plant character (PMC), resistance to disease (RDC) and fruit nutrition content (FNC). The canonical correlation coefficient between two groups each other among the 5 character groups was estimated. The results indicate that PMC has biggest correlation with FYC, the next is the correlation between FNC and PMC, FYC, the third is the correlation between...

The 15 characters were surveyed for 50 local pepper varieties. The 15 characters were classified as 5 groups: fruit yield per plant (PFY), fruit character (FYC), plant character (PMC), resistance to disease (RDC) and fruit nutrition content (FNC). The canonical correlation coefficient between two groups each other among the 5 character groups was estimated. The results indicate that PMC has biggest correlation with FYC, the next is the correlation between FNC and PMC, FYC, the third is the correlation between RDC and FNC and the smallest one is that between RDC and PMC, FYC. The canonical correlation coefficients were larger between multiple character groups than between single character group, but the largest canonical correlation coefficient contained smaller ratio of genetic correlation information to total genetic correlation information between multiple character groups than between single character group.

研究了 5 0个辣椒地方品种的单株产量 (PFY)、果实性状 (FYC)、植株性状 (PMC)、抗病性 (RDC)和果实营养含量(FNC)两两间的典型相关关系。结果表明 ,植株性状与果实性状间的相关性最密切 ,其次是果实营养含量和植株性状、果实性状间 ,再次是抗病性与果实营养含量间 ,抗病性与植株性状、果实性状间的相关性最小。一般与多个性状组间的典型相关系数大于与单个性状组间的典型相关系数 ,但最大的典型相关系数包含的遗传信息占总相关信息的比率反而减小。

Information ratio is a powerful tool for security investment funds performance evaluation. This article introduces the calculating methods and meanings of information ratio, studies the relationship between information ratio and Sharp ratio, analyzes the connection existing between the statistical significance of excess returns and an information ratio, and points out some questions should be warned when evaluating security investment funds performance by information ratio.

信息比率是证券投资基金绩效评价的一种得力工具 .介绍了信息比率的计算方法 ,解释了信息比率的含义 ,研究了信息比率与夏普比率之间的关系 ,分析了超额收益率统计显著性检验与信息比率统计显著性之间的联系 ,指出了利用信息比率进行基金绩效评价时需要注意的事项 .

As for the common LSB steganography,SPA(Sample Pair Analysis) method can estimate the embedding rate in image with high precision.This paper presents a novel kind of LSB steganalytical method against SPA,which major in compensating image after embedding.Using the proposed algorithm,SPA steganalysis will get a very small estimate value close to 0 even when the embedding rate is near 100%,which is an incorrect judgement. Moreover,some compensation parameters can be used as part of secret key to improve the system...

As for the common LSB steganography,SPA(Sample Pair Analysis) method can estimate the embedding rate in image with high precision.This paper presents a novel kind of LSB steganalytical method against SPA,which major in compensating image after embedding.Using the proposed algorithm,SPA steganalysis will get a very small estimate value close to 0 even when the embedding rate is near 100%,which is an incorrect judgement. Moreover,some compensation parameters can be used as part of secret key to improve the system security.Experimental results show that this method also can defeat the RS analysis and many kinds of improved version of SPA and RS steganalysis.

针对常用的LSB信息隐藏,SPA(Sample Pair Analysis)分析方法能以很高的精度估计出图像中隐藏信息的比率.文章通过对隐藏信息后的图像进行动态补偿,给出了一类可抵御SPA分析的LSB信息隐藏方法.该方法使得即使嵌入比率接近于100%,使用SPA方法分析仍将得到一个接近于0的低于判决门限的估计值,从而做出错误的判决.同时,将动态补偿的相关参数作为密钥的一部分,进一步提高了隐藏系统的安全性.实验表明:该方法同时还能有效抵抗RS分析及SPA和RS的多种改进方法的攻击.

 
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