搜索结果: 1-15 共查到“知识库 统计调查分析理论”相关记录245条 . 查询时间(5.016 秒)
Assessing the significance of global and local correlations under spatial autocorrelation;a nonparametric approach
Geostatistics Monte-Carlo methods Resampling Spatial autocorrelation Spatial statistics Variogram
2015/8/21
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...
机构投资者持股压力下证券分析师乐观倾向研究
证券分析师 荐股评级 机构投资者 乐观倾向
2016/11/11
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...
集对分析在毕业论文指导满意度研究中的应用
满意度 集对分析
2011/8/29
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。
县级统计分析方法与应用分析
县级统计分析 方法 步骤
2011/8/30
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。
Thermal conductivity of mass-graded graphene flakes
mass-graded graphene flakes Thermal conductivity
2011/7/19
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 ...
Spectral Methods for Learning Multivariate Latent Tree Structure
Multivariate Latent Spectral Methods
2011/7/19
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 ...
A CLT for Information-theoretic statistics of Non-centered Gram random matrices
Random Matrix Spectral measure Stieltjes Transform
2011/7/19
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...
On the Weakenesses of Correlation Measures used for Search Engines' Results (Unsupervised Comparison of Search Engine Rankings)
Search Engines Correlation Measures Search Engine Rankings
2011/7/19
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...
Variance Decomposition and Replication In Scrabble: When You Can Blame Your Tiles?
Variance Decomposition eplication In Scrabble
2011/7/19
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...
An EM Algorithm for Continuous-time Bivariate Markov Chains
Parameter estimation EM algorithm Continuous-time bivariate Markov chain
2011/7/19
We study properties and parameter estimation of finite-state homogeneous continuous-time bivariate Markov chains.
A procedure for the change point problem in parametric models based on phi-divergence test-statistics
Change point Information criterion Divergence Wald test-statistic
2011/7/19
This paper studies the change point problem for a general parametric, univariate or multivariate family of distributions.
Approximate group context tree: applications to dynamic programming and dynamic choice models
categorical time series group context tree
2011/7/19
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.
Revealing Sub-Optimality Conditions of Strategic Decisions
Strategic decision making Fitness landscape theory
2011/7/19
Conceptual view of fitness and fitness measurement of strategic decisions on information systems, technological systems and innovation are becoming more important in recent years.
The Lasso, correlated design, and improved oracle inequalities
compatibility correlation entropy high-dimensional model
2011/7/19
We study high-dimensional linear models and the $\ell_1$-penalized least squares estimator, also known as the Lasso estimator.