因子分析方法研究渭河水质     

王丙参  魏艳华  夏鸿鸣 《宁夏师范学院学报》2014,35(3):55-62

选取不同的水质指标和样本,分别对甘肃省天水市境内渭河水质进行因子分析,给出每个样本的水质类别,并通过对结果分析比较,找出区别和联系,从而使人们在选取指标和样本时,减少盲目性和随意性,把因子分析方法更好地用于水质评价.  相似文献   

图示法与要素组合方式在法学教学中的应用分析     

周丽 《钦州学院学报》2013,(11):62-66

法学传统教学方法与手段难以引起学生的学习兴趣,在法学教育改革浪潮中,以建构主义理论、双重编码理论作为基础,关注、研究图示法与要素组合方式在法学教学中应用,重点探讨“看、听、讲、想、做、动、静”七大要素之间轮换对法学相应知识进行辅助讲解的现实效果,以求优化法学课堂教学质量.  相似文献   

百越古道民族关系及其对现代社会的影响     

凌绍崇 《梧州学院学报》2013,(4)

“百越古道”是岭南百越民族居住地区的一条古道,云集着壮、汉等20多个民族及其先民。他们之间的关系是这片疆土政治稳定和经济发展的社会基础。该文以百越古道交汇点横山寨为例,论述了百越古道民族关系中经济、政治、文化等方面内在因素以及民族关系对现代社会的深远影响。  相似文献   

Examining the factor structure of the Family Child Care Environment Rating Scale—Revised     

Diana Schaack  Vi-Nhuan Le  Claude Messan Setodji 《Early childhood research quarterly》2013

The purpose of this study was to examine the factor structure of the Family Child Care Environment Rating Scale—Revised (FCCERS-R) in high-stakes contexts. The results of an exploratory factor analysis revealed three dimensions of quality on the FCCERS-R: (1) Activities/Materials, (2) Language/Interaction, and (3) Organization. This study also explored whether abridged versions of the FCCERS-R could serve as a proxy for the full instrument. In addition to subsets of FCCERS-R items created from the factor structure, purposively and randomly chosen item subsets were created. The purposively chosen subsets included 6-, 9-, and 12-item scales comprised of the items with the highest factor loading across the three factors, whereas the randomly chosen subsets consisted of 12 items. Results of a discriminant analysis showed that the factor subsets were poorer proxies for the total FCCERS-R score than were the other subsets, which demonstrated comparable internal consistencies and discriminant power as the full FCCERS-R when classifying homes into general quality categories. Implications for adopting shorter versions of the FCCERS-R are discussed.  相似文献   

Addressing the Lack of Measurement Invariance for the Measure of Acceptance of the Theory of Evolution     

Amy Wagler  Ron Wagler 《International Journal of Science Education》2013,35(13):2278-2298

The Measure of Acceptance of the Theory of Evolution (MATE) was constructed to be a single-factor instrument that assesses an individual's overall acceptance of evolutionary theory. The MATE was validated and the scores resulting from the MATE were found to be reliable for the population of inservice high school biology teachers. However, many studies have utilized the MATE for different populations, such as university students enrolled in a biology or genetics course, high school students, and preservice teachers. This is problematic because the dimensionality and reliability of the MATE may not be consistent across populations. It is not uncommon in science education research to find examples where scales are applied to novel populations without proper assessment of the validity and reliability. In order to illustrate this issue, a case study is presented where the dimensionality of the MATE is evaluated for a population of non-science major preservice elementary teachers. With this objective in mind, factor analytic and item response models are fit to the observed data to provide evidence for or against a one-dimensional latent structure and to detect which items do not conform to the theoretical construct for this population. The results of this study call into question any findings and conclusions made using the MATE for a Hispanic population of preservice teachers and point out the error of assuming invariance across substantively different populations.  相似文献   

Measuring the complexity of upper primary school children’s self-regulated learning: A multi-component approach     

Sabrina Vandevelde  Hilde Van Keer  Yves Rosseel 《Contemporary educational psychology》2013

Balancing theoretical and practical issues in the measurement of SRL remains a challenge. This is especially the case for large-scale studies among primary school children’s SRL. In this respect, the present study describes the development and validation of the Children’s Perceived use of Self-Regulated Learning Inventory (CP-SRLI) consisting of nine components. A multistep process was used to develop the questionnaire, including reviews by a teacher and expert panel, cognitive interviews with upper primary school children, and a large-scale administration. The original 109-item questionnaire was then presented to 504 fifth and 463 sixth graders (sample 1). Subsequent to exploratory factor analyses on each component, the factor structure of each component was confirmed by confirmatory factor analyses using an independent second sample (409 fifth and 314 sixth graders), leading to a questionnaire of 75 items. Further, the factor structure of the different components is found to be invariant across boys and girls. The implications of the results and potential avenues for future research are presented and discussed.  相似文献   

使用Q值提升技术的增益可调GSM低噪声放大器的设计     

王辉  陈兵 《人天科学研究》2009,(2)

现代CMOS工艺的发展使得在CMOS工艺上设计射频IC前端成为可能。但在传统CMOS工艺集成的片上螺旋电感品质因数(Q)偏低,大大影响其性能。通过引入负电导实现螺旋电感Q值提升,并将其应用于共栅低噪声放大器的设计。  相似文献   

广东各地市科技竞争力评价研究     

安宁 《科技成果管理与研究》2008,(5):5-8

用SPSS软件对广东省21个地市的8项主要科技竞争力指标进行因子分析,得出影响科技竞争力的5个关键因子,分别为科技效果因子,科技投入因子,经济基础因子。计算出各地区相应因子综合绩效的得分和排名,并对结果给出了相应的分析和评价。  相似文献   

土地市场运行对经济增长的影响：作用机理与实证评价   总被引：2，自引：1，他引：1  

王青  陈志刚  陈逸  叶依广 《资源科学》2008,30(10):1497-1502

本文基于一个城市土地市场运行对经济增长影响的理论框架,系统探讨和实证评价了中国土地市场运行对经济增长的作用机理和影响程度。研究结果指出,土地市场运行对经济增长的影响主要是通过经济要素投入与配置的改变展现出来的,包括土地一级市场运行对经济要素投入的规模扩张效应,土地二级市场运行对经济要素配置的结构优化效应,以及土地市场化程度发展对经济要素利用的经济激励效应。这三大效应在目前中国土地市场的运行过程中存在着明显的结构差异,其对经济增长的贡献率分别为5.07%、0.20%和2.65%,即规模扩张效应>经济激励效应>结构优化效应。因此,为更好地促进土地市场运行的经济增长作用效应的发挥,中国政府仍需采取必要的政策措施,以进一步完善土地市场结构和规范土地市场的运行。  相似文献   

求最大公因式的矩阵变换法     

吕效国 《南通职业大学学报》2000,14(2):37-39

求多项式的最大公因式教材中都是运用辗转相除法,运算的过程比较复杂。本介绍的矩阵变换法,使求解过程简洁明了,尤其对多于2个的多项式的最大公因式可一并求出,更显其优越性。  相似文献