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

管业鹏  顾伟康 《Journal of Zhejiang University. Science. B》2004,(7)

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…  相似文献   

边疆地区高校经济困难生心理健康及人格特点的调查分析     

胡发稳  李辉  丁颢  李丽菊 《民族教育研究》2006,17(3):85-90

贫困大学生的心理健康问题备受关注，引起了大量的相关研究。由于地缘的差异性，贫困生心理问题体现出多样性特点。该文使用症状自评量表（SCL-90）和大学生现实感量表（艾森克现实性-幻想性测验）对滇南边疆民族地区两高校762名经济困难大学生进行团体测查，分析表明他们的心理健康水平较全国青年常模低，存在性别和经济状况等差异，其人格特质倾向于现实性，其中与他们的心理健康有因果关系的人格特征有实际性、男子气-女子气、攻击性和自信力。因此在对他们进行心理解困时，应有系统观理念，认知优化意识和“问题中心”的策略。  相似文献   

体育专业大学生身体成分与心肺功能的相关性研究     

聂环玲  宋光杰  何兴国  韩学良 《河南职业技术师范学院学报》2011,(5):106-108

以身体成分与心肺功能之间的相关性为研究目的,对本单位社会体育专业09级64名男生进行了身体成分、心率及肺活量测试,研究结果表明：各项身体成分同心率之间相关性不显著;体重与肺活量之间呈显著正相关（P〈0.01）,体脂百分比、肌肉百分比同肺活量之间的相关性不显著;体重、体脂百分比与肺活量体重指数之间呈极显著负相关（P〈0.01）,肌肉百分比与肺活量体重指数之间呈极显著正相关（P〈0.01）.  相似文献   

一元线性回归系数比值不确定度的评定     

罗颖 《赣南师范学院学报》2011,32(6):92-95

分析一元线性回归系数的相关性,导出一元线性回归系数比值不确定度的计算公式,指出了某些文献中有关回归系数比值不确定度评定存在的问题.  相似文献   

FARMER: A novel approach to file access correlation mining and evaluation reference model     

夏鹏  冯丹  王芳 《上海大学学报(英文版)》2011,15(6):574-588

File semantic has proven effective in optimizing large scale distributed file system. As a consequence of the elaborate and rich I/O interfaces between upper layer applications and file systems, file system can provide useful and insightful information about semantic. Hence, file semantic mining has become an increasingly important practice in both engineering and research community. Unfortunately, it is a challenge to exploit file semantic knowledge because a variety of factors could affect this information exploration process. Even worse, the challenges are exacerbated due to the intricate interdependency between these factors, and make it difficult to fully exploit the potentially important correlation among various semantic knowledges. This article proposes a file access correlation miming and evaluation reference (FARMER) model, where file is treated as a multivariate vector space, and each item within the vector corresponds a separate factor of the given file. The selection of factor depends on the application, examples of factors are file path, creator and executing program. If one particular factor occurs in both files, its value is non-zero. It is clear that the extent of inter-file relationships can be measured based on the likeness of their factor values in the semantic vectors. Benefit from this model, FARMER represents files as structured vectors of identifiers, and basic vector operations can be leveraged to quantify file correlation between two file vectors. FARMER model leverages linear regression model to estimate the strength of the relationship between file correlation and a set of influencing factors so that the “bad knowledge” can be filtered out. To demonstrate the ability of new FARMER model, FARMER is incorporated into a real large-scale object-based storage system as a case study to dynamically infer file correlations. In addition FARMER-enabled optimize service for metadata prefetching algorithm and object data layout algorithm is implemented. Experimental results show that is FARMER-enabled prefetching algorithm is shown to reduce the metadata operations latency by approximately 30%–40% when compared to a state-of-the-art metadata prefetching algorithm and a commonly used replacement policy.  相似文献   

教学管理的层次-灰色关联分析评价     

苏俊民 《天津工程师范学院学报》2003,13(1):30-32

在建立了教学管理评价指标体系的基础上,引入层次分析和灰色关联分析相结合的综合评价模型对教学管理进行评价,模型中利用层次分析法确定各评价指标的合理权重,应用灰色关联分析法对定性信息进行量化处理和比较,减少了主观因素的影响,提高了评价结论的准确性,为教学管理评价提供了一种新方法。  相似文献   

三种样本相关系数之内在联系     

孙贺琦 《三明学院学报》2001,18(2):1-4

论证了积差相关系数、点二列相关系数和等级相关系数等三种样本相关系数,都是同一概念和公式的不同应用和表现.所述的三种相关系数的使用条件要从它们的原始来源中来理解和要求.  相似文献   

概率方法建模预测分数线     

刘金伟 《平原大学学报》2004,21(3):50-51

结合建模的步骤，运用回归分析、假设检验、正态分布等工具预测分数线。  相似文献   

环云南地区入境旅游与经济发展的空间溢出及门槛效应     

范嘉琪 《宜春学院学报》2020,(2):42-49

随着云南成为我国入境旅游中心,本文基于2006-2017年云、贵、川、渝、藏、桂六个地区面板数据,综合运用空间计量回归和门槛面板回归模型深入分析了六个地区入境旅游的空间相关性、空间外溢和门槛效应入境旅游对经济发展存在着非线性的空间入境旅游收入增长、入境旅游人数增长对经济增长有着显著的门槛效应。随着增长率提高,其对经济发展的弹性在减少。因此,对于经济发展水平相对低的云南、贵州,可以通过发展入境旅游来促进其经济快速增长,但对于四川、贵州、西藏,由于门槛效应的存在,需要优化旅游产品和旅游空间结构,以促进入境旅游对经济发展的作用。  相似文献   

营养胁迫下枝梗颖花分化、退化与生理性状的相关     

王永锐  谭远德 《中山大学学报论丛》1989,(5)

在营养胁迫下,发现水稻穗部枝梗和颖花一些主要生理性状,如N、P、K、叶和鞘、可溶性糖、叶绿素等都存在极显著的遗传差异,表明它们分别受到不同的基因型控制。但枝梗和颖花的分化,除了与P和主茎干物重/分蘖干物重,有显著和极显著的正遗传相关外,与其它生理性状都没有达到显著遗传相关性,但如果不考虑相关显著,仅考虑它们的相关系数的大小,显然是P>N>K,这与一般理论不相符。穗部的枝梗及颖花退化数,与所有这些生理性状均无遗传相关性。为了解释这一试验结果,我们提出了关于水稻幼穗枝梗颖花分化发育过程中,对植株体内或土壤中N、P和K因需求量不同,而引起的反应强度和敏感性不同的假说。  相似文献