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In this paper we present a method to assess the significance of the correlation coefficient when at least one of the variables is spatially autocorrelated. The standard test assumes independence of th...
荐股评级出现乐观倾向,是当前全球证券分析师行业存在的一个突出问题。基于欺诈三角理论,本研究从压力、机会和合理化解释三方面对分析师荐股评级乐观倾向成因进行了理论分析,并以2010~2012年间中国证券分析师发布的21054个荐股评级数据为研究对象进行了实证检验。结果表明机构投资者持股比例越高,证券分析师越倾向于发布乐观的评级报告,而且在乐观评级情况下,分析师所推荐股票达到或者超过其预测的概率越高。本...
For the evaluation of information flow in bivariate time series, information measures have been employed, such as the transfer entropy (TE), the symbolic transfer entropy (STE), defined similarly to T...
老师指导水平是影响经济类本科毕业论文质量的重要因素,本文根据学生对导师指导满意度的调查数据,运用集对分析方法对导师指导满意度进行分析。挖掘和利用集对分析法在满意度评价中的价值对于提高毕业论文指导满意度具有十分重要的意义。
县级统计分析在统计工作中具有重要的地位与作用,必须遵循县级统计分析的方法与步骤对统计调查与整理的数据进行科学分析,正确揭示现象的发展特征和规律。
In this letter we investigate thermal conductions in mass-graded graphene flakes by nonequilibrium molecular dynamics simulations. It shows mass-graded graphene flakes reveal no thermal rectification ...
This work considers the problem of learning the structure of a broad class of multivariate latent variable tree models, which include a variety of continuous and discrete models (including the widely ...
In this article, we study the fluctuations of the random variable: $$ {\mathcal I}_n(\rho) = \frac 1N \log\det(\Sigma_n \Sigma_n^* + \rho I_N),\quad (\rho>0) $$ where $\Sigma_n= n^{-1/2} D_n^{1/2} X_n...
The correlation of the result lists provided by search engines is fundamental and it has deep and multidisciplinary ramifications. Here, we present automatic and unsupervised methods to assess whether...
In the game of Scrabble, letter tiles are drawn uniformly at random from a bag. The variability of possible draws as the game progresses is a source of variation that makes it more likely for an infer...
We study properties and parameter estimation of finite-state homogeneous continuous-time bivariate Markov chains.
This paper studies the change point problem for a general parametric, univariate or multivariate family of distributions.
The paper considers a variable length Markov chain model associated with a group of stationary processes that share the same context tree but potentially different conditional probabilities.
Conceptual view of fitness and fitness measurement of strategic decisions on information systems, technological systems and innovation are becoming more important in recent years.
We study high-dimensional linear models and the $\ell_1$-penalized least squares estimator, also known as the Lasso estimator.

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