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31.
32.
林小静 《体育科技文献通报》2008,16(4):47-48
通过调查问卷和走访、咨询部分篮球界专家,结果发现裁判员在临场中的判罚尺度和准确性与裁判员的心理有直接的关系。裁判员的心理变化受到临场执法经验不足、篮球规则裁判法的掌握程度、情绪不稳定、自信心不足、职业道德等问题的影响,本文试对此进行分析并探究对策,希望能为今后篮球裁判员在执法中提高心理调控能力提供参考依据。 相似文献
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广西约有100多家Ⅳ类密封放射源核技术应用单位,300多人处于这些核技术应用单位的辐射工作岗位。文章通过对多年监测数据与国家标准限值比对分析,表明辐射工作人员因辐射工作受照射的剂量远低于国家标准。 相似文献
35.
给出了Bernoulli分布中未知参数的4种不同形式的近似置信区间,包括基于Hoeffding不等式和Bernstein不等式两种新的置信区间,并通过模拟比较了置信区间在大样本和小样本情形下的优劣. 相似文献
36.
Optical radiation is capable of altering the spectral reflectance of layers of colorants. Light damage is of particular importance in respect to unique historical objects in exhibitions. The major parameter governing this process is the spectral irradiance applied to the surface. As this may vary significantly for different light sources, an experimental investigation of the damage potential of the numerous illuminants available is a cumbersome task. In this work a numerical algorithm for the prediction of modifications of the spectral reflectance of colorants subject to a given arbitrary spectral irradiance over a given time is presented. It uses the temporal evolution of the spectral reflectance of the dye or pigment at issue when irradiated by a set of narrowband light sources as input data. The predicted reflectance spectra and the resulting color changes are compared to those measured for samples irradiated with common polychromatic light sources. The concept described in this work aims at the implementation of a standardized procedure and database for the prediction of radiative damage for a comprehensive range of pigments and dyes. 相似文献
37.
本文以美国全国性大学为样本,对大学筹资结构与办学绩效的关系进行了实证分析。结果表明,大学经费来源结构对大学办学绩效不构成显著影响,竞争性经费结构对大学办学绩效则构成显著影响。具体到各项经费上,政府拨款比例对大学办学绩效构成显著负向影响,政府补助与合同、个人捐赠与合同比例、投资收益比例、其他核心收益比例均对大学办学绩效构成显著正向影响,学费比例不构成显著影响。我国应该鼓励大学筹资结构多元化和民办大学的发展,促进大学基金会和社会捐赠制度建设,培育和挖掘企业或校友资源,增强政府经费的竞争性和选择性,从而促进大学为赢得更多经费支持而不断完善内部的治理结构,提高自身办学绩效。 相似文献
38.
段知壮 《广东广播电视大学学报》2015,(1)
1959-1961年中国大饥荒是人类历史上最为严重的饥荒之一,对这次大饥荒的成因不同的学者有不同的见解,但究其根本原因,乃是集权与计划失误所造成的。各位学者在论证大饥荒成因时的不同视角,从根本上讲并没有否定这一根源,无论是“退社权”、“退堂权”还是“集体积累”说等等,如果抛开这个根本性因素便无法完整地解释大饥荒的成因。 相似文献
39.
Gwowen Shieh 《Journal of Experimental Education》2015,83(2):203-217
Analysis of variance is one of the most frequently used statistical analyses in the behavioral, educational, and social sciences, and special attention has been paid to the selection and use of an appropriate effect size measure of association in analysis of variance. This article presents the sample size procedures for precise interval estimation of eta-squared and partial eta-squared in fixed-effects analysis of variance designs. The desired precision of a confidence interval is assessed with respect to (a) the control of expected width and (b) the tolerance probability of interval width within a designated value. In addition, sample size calculations for standardized contrasts of treatment effects and corresponding partial strength of association effect sizes are also considered. 相似文献
40.
Jeroen J.H. Dekker 《Paedagogica Historica: International Journal of the History of Education》2015,51(6):702-715
The challenge of using images for the history of education and childhood will be addressed in this article by looking at them as representations. Central is the relationship between representations and reality. The focus is on the power of paintings as representations of aspects of realities. First the meaning of representation for images as sources for the history of education and childhood – mirrors of realities, complex symbol systems or representations – is explained. A distinction is made between images of real people and images of patterns of human behaviour and the value of the phenomenon of historical sensation as a methodological instrument for insight in that relationship is dealt with. Second, a specific genre of paintings from the seventeenth century, namely portraits of dead children, will be described and analysed to make clear that their value for the history of education and childhood can be studied adequately only by using those images as representations and by interpreting them within the cultural rules and regulations of time and place. This analysis results in the conclusion that images should be considered in their function as representations of aspects of educational and childhood reality. 相似文献