基于改进灰色关联度的火灾致因分析

通过对灰色关联度模型机理进行分析,引入符号函数重定关联系数,并给出了一种新的关联度定义方法.改进后的关联度模型能够反映时间序列的正、负相关关系.实例验证表明,改进的灰色关联度能够更真实地反映时间序列曲线的关联程度,所得关联分析结果客观可靠,并且易于上机实现.     

统计中利用Excel进行相关分析

Excel具有强大的计算功能，利用它可以进行专业的统计运算，在相关分析中，可以利用它制作相关图和相关表，计算相关系数和进行回归分析。     

统计中利用Excel进行相关分析

Excel具有强大的计算功能,利用它可以进行专业的统计运算,在相关分析中,可以利用它制作相关图和相关表,计算相关系数和进行回归分析。     

关于偏相关系数的计算公式的一点注记

首先对偏相关系数的常用的定义与计算方法作了归纳,然后从多元正态分布理论中的条件分布的结论出发,推导得出通过相关系数阵或协方差阵求逆的方法来计算偏相关系数的公式,从而对利用相关系数阵求逆方法计算偏相关系数的公式给出了合理的解释。     

Common Elements Correlation

This work demonstrates common elements correlation, its extension to negative correlation, and the production of bivariate normal samples for a specified correlation matrix.     

自我效能、兴趣水平与学习策略等八因素的相关性——以英语高职生为研究样本

本研究主要运用相关分析法及个人访谈法对来源于高职院校三大类学生的归因倾向、学校环境、兴趣水平、焦虑水平、学习策略水平、动机水平、动机行为、自我效能感水平分别与他们的自我效能感水平、兴趣水平作了相关分析。结果发现:三类不同学生归因倾向、学校环境、兴趣水平、焦虑水平、学习策略水平、动机水平、动机行为、自我效能感之间两两相关。对厌学者而言,自我效能与学习策略、动机行为达到非常显著的相关,与兴趣水平达到显著的相关,与学校环境存在不显著的负相关。兴趣水平与焦虑水平、自我效能达到非常显著的相关,与学校环境达到显著相关,与归因存在负相关。对次厌学者而言,自我效能与学习策略达到非常显著的相关,与动机行为达到显著相关,与学校环境、归因倾向呈现低等程度的负相关。乐学类学生的自我效能与动机行为产生了显著的正相关,与学校环境、归因方式产生低度负相关;他们的兴趣水平与动机水平、焦虑水平、自我效能、动机行为产生了中低度相关,与归因、学校环境、学习策略产生了中低程度的负相关。     

大学生英、日语言学习迁移中的影响因素和因素结构分析

以210名大学生为对象开展问卷调查,并据此进行因素分析,抽取作为第二外语学习的日语学习过程中影响学习迁移的主要因素,将9个主因素之间的相关通过AMOS4．0做结构模型,验证从英语学习到日语学习的学习迁移过程中9因素之间的相关,并根据相关系数具体分析各因素之间相关得出的结论。     

经理人报酬业绩关联性实证研究

经理人报酬业绩关联性是设计以业绩为基础的经理人报酬契约的前提条件。较强的关联性将有利于系统化地引导企业业绩趋好。文章运用实证分析方法。考察我国上市公司经理人报酬业绩的关联性。验证公司性质、业绩的差异对谊关联性的影响。以期对已有的研究成果做一些有益的补充。研究结果表明：经理人报酬与业绩之问存在统计上的相关关系；国有性质上市公司的关联性弱于非国有性质的样本公司；业绩表现较好的上市公司较之业绩偏差的公司。经理人报酬业绩关联性更强。     

含油制冷剂R600a管内两相流动摩擦压降研究

基于文献含油制冷剂R600a两相流动摩擦压降实验数据,采用文献中6种关联式模型对含油制冷剂R600a两相摩擦压降的实验数据进行预测判断。结果表明:油影响因子模型Schlager关联式和Eckel关联式的预测值与实验值平均绝对偏差分别为27.3%和24.4%;混合物性的两相增强因子模型Zurcher关联式和Hu关联式的预测值与实验值的平均绝对偏差分别为33.8%和34.0%,上述关联式预测值普遍低于实验值。     

Regularized canonical correlation analysis with unlabeled data

In standard canonical correlation analysis （CCA）, the data from definite datasets are used to estimate their canonical correlation. In real applications, for example in bilingual text retrieval, it may have a great portion of data that we do not know which set it belongs to. This part of data is called unlabeled data, while the rest from definite datasets is called labeled data. We propose a novel method called regularized canonical correlation analysis （RCCA）, which makes use of both labeled and unlabeled samples. Specifically, we learn to approximate canonical correlation as if all data were labeled. Then, we describe a generalization of RCCA for the multi-set situation. Experiments on four real world datasets, Yeast, Cloud, Iris, and Haberman, demonstrate that, by incorporating the unlabeled data points, the accuracy of correlation coefficients can be improved by over 30%.     

A matching algorithm based on hybrid matricesconsisting of reference differences and disparities

INTRODUCTION A common method for extracting depth in-formation from intensity images is based on theprinciples of stereovision. In this method, a pair ofimages is obtained using two cameras displacedfrom each other by a known distance. After deter-mining the stereo correspondence, the distance ofvarious points is computed using triangulation(Jeon et al., 2001). Stereo correspondence is theproblem of finding corresponding points in two ormore images of the same scene, usually assumin…     

静态代码属性与软件模块缺陷数的偏相关分析

为了解决因选择不同的静态代码属性子集而带来的不同软件缺陷预测性能的分歧,采用偏相关分析法,分析了静态代码属性之间的相关性,以及该相关性对预测算法的影响。在Eclipse数据集（包括发布前与发布后的缺陷数据）上的实验结果表明,静态代码属性之间存在偏相关。同时,也证实了偏相关是软件质量分析的非常重要的因素,为建立软件缺陷预测模型提供了可靠的分析方法。     

大学生网络交往动机与行为特点研究

为探究大学生网络交往动机与网络行为特点之间的关系,文章采用大学生网络交往动机问卷和大学生网络交往行为量表,对687名大学生进行问卷调查,结果显示:获取信息与上传下载、信息查询、网络教育呈显著正相关;辅助学业与上传下载、信息查询、网络教育呈显著正相关;便利生活与上传下载、网络游戏、网络购物呈显著正相关;表达情感与电子信箱和聊天的使用频率呈显著正相关;确认自我与上网时间及聊天呈显著正相关。因此结论为大学生网络交往动机与网络行为特点存在显著相关。     

A matching algorithm based on hybrid matrices consisting of reference differences and disparities

Unique correct correspondence cannot be obtained only by use of gray correlation technique,which describes gray similar degree of feature points between the left and right images too unilaterally.The gray correlation technique is adopted to extract gray correlation peaks as a coarse matching set called multi-peak set.The disparity gradient limited constraint is utilized to optimize the multi-peak set.Unique match will be obtained by calculating the correlation of hybrid matrices consisting of reference differences and disparities from the multi-peak set.Two of the known corresponding points in the left and right images,respectively,are set as a pair of reference points to determine search direction and search scope at first.After the unique correspondence is obtained by calculating the correlation of the hybrid matrices from the multi-peak set,the obtained match is regarded as a new reference point till all feature points in the left(or right)image have been processed.Experimental results proved that the proposed algorithm was feasible and accurate.     

择业观念对大学毕业生就业的影响——基于2007届大学毕业生的实证研究

择业观念是影响大学毕业生就业的一个重要因素。实证研究结果表明:大学毕业生择业时,其对单位性质和职业类型的要求与就业机会获得和地位获得后的月收入水平呈负相关;求职主动性与就业机会呈正相关;工资水平期望与地位获得后的月收入呈正相关;职业苦乐意识与职业满意度呈负相关。因此,高等学校必须大力加强就业形势教育,引导大学毕业生树立正确的择业竞争观、职业地位观、职业苦乐观,端正择业态度,转变择业观念,从而有利于其职业地位的获得。     

What is Strong Correlation?

Interpretation of correlation is often based on rules of thumb in which some boundary values are given to help decide whether correlation is non‐important, weak, strong or very strong. This article shows that such rules of thumb may do more harm than good, and instead of supporting interpretation of correlation – which is their aim – they teach a schematic approach to statistics. Therefore they should be avoided in a statistics course.     

An empirical study of the influence of the concept of “job-hunting” on graduates’ employment

The concept of job-hunting is an important factor affecting university students’ employment. This empirical study shows that while hunting for a job, graduates witness negative correlation between their expectation of the nature of work and the demand for occupational types and the accessibility to a post and monthly income; positive correlation between students’ initiative and employment opportunities; positive correlation between salary expectation and real income; negative correlation between mental preparation for hardship and job satisfaction. Therefore, institutions of higher learning must strengthen their employment education, guiding students to foster a sound sense of competition, the concept of occupational position, mental preparation for vocational hardship so that students can rectify their attitude towards employment and adjust their employment concept, thus benefiting them in gaining a position.     

Rats’ responses to molar and local schedule constraints

Three experiments explored responses to molar and local schedule constraints. Thirsty rats pressed a lever for access to a water spout. In Experiment 1, response totals were unaffected by two local schedule characteristics—the variability of the instrumental requirement and the variability of the magnitude of contingent reward. Experiment 2 manipulated the correlation between the instrumental requirement and the magnitude of reward. This correlation did not affect the behavioral price ratio (presses per lick) at a molar level. At a local level, the positive correlation created a lower mean lick price than did the negative correlation. The rats licked more, and licked less efficiently, under the positive correlation than under the negative correlation. Experiment 3 compared two ways of manipulating the molar presses/lick ratio: The instrumental (contingent) series varied the instrumental (contingent) requirement, but held the other requirement constant. As the ratio increased, total leverpresses increased, and total licks decreased linearly; the two series did not differ significantly. At higher lick prices, the rats licked more efficiently and made more extra licks at the spout as it closed. The results help delimit the applicability of molar models of the organism’s response to schedule constraints.     

Further Study of the Choice of Anchor Tests in Equating

In this study, we describe what factors influence the observed score correlation between an (external) anchor test and a total test. We show that the anchor to full‐test observed score correlation is based on two components: the true score correlation between the anchor and total test, and the reliability of the anchor test. Findings using an analytical approach suggest that making an anchor test a miditest does not generally maximize the anchor to total test correlation. Results are discussed in the context of what conditions maximize the correlations between the anchor and total test.     

我国居民消费的典型相关分析

本介绍了典型相关的基本思想，对居民消费的收入和支出之间的相关关系作典型分析，并就其相互之间的影响因数进行讨论。