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21.
张晓青 《河南广播电视大学学报》2011,(3):30-32
建国后,在译介与斯蒂芬·茨威格相关作品的过程中,出现了茨威格的国籍、茨威格与其第一任夫人的结识、茨威格及其作品在中国的首次译介以及作品的出版时间等译介错误。本文依据德文原版资料,采用史料分析的方法,对这些错误进行指正,以期使读者能更准确地了解茨威格及其作品。 相似文献
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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
25.
为提高园林绿植地被植物引种成功率,在高维数据聚类中采用相似性度量算法分析地被植物引种气候指标间相似度。选取原产于我国新疆维吾尔自治区的皱叶剪秋罗作为地被植物引种品种,新疆哈密地区为引种源地,兰州、武汉、北京、广州等市为目标引种地。以 5 座城市 2015 年气候年值数据中的 8 项气候指标作为分析指标,采用高维数据聚类分析相似性度量算法计算引种地和引种源地间气候环境相似度,依据相似度大小次序,分析遴选出与哈密地区气候环境接近的目标引种地。实验结果表明,基于高维数据聚类分析的相似性度量算法在地被植物引种气候相似性分析中可较好体现引种源地与目标引种地气候相似度,实验结果与实际情况相符。相似性度量算法可为地被植物异地引种提供辅助决策分析,使园林绿植引种更科学。 相似文献
26.
拉萨河下游河谷区三叶草引种品比试验研究 总被引:5,自引:0,他引:5
针对拉萨河谷的自然气候条件, 选择了9种三叶草品种进行集中品比试验, 观察各种牧草的越冬率、生育期、高生长速率和产草量等生产形状。结果表明, 拉萨河谷下游河谷区适合引种栽培三叶草,三叶草能够顺利越冬,能够取得与其它地区相似气候条件下的相当产量。在参试品种中,Zgrk8802 红三叶、Beskyd红三叶和Vesna 红三叶是适宜于拉萨河谷下游的优良牧草品种,在越冬率、产草量、生长期和生长速率方面表现都是优良的品种,值得在拉萨河谷下游区推广。 相似文献
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Describing students of the African Diaspora: Understanding micro and meso level science learning as gateways to standards based discourse 总被引:1,自引:1,他引:0
Ed Lehner 《Cultural Studies of Science Education》2007,2(2):441-473
In much of the educational literature, researchers make little distinction between African-American students and students
of the African Diaspora who immigrated to the United States. Failing to describe these salient student differences serves
to perpetuate an inaccurate view of African-American school life. In today’s large cities, students of the African Diaspora
are frequently learning science in settings that are devoid of the resources and tools to fully support their success. While
much of the scholarship unites these disparate groups, this article details the distinctive learning culture created when
students from several groups of the African Diaspora learn biology together in a Brooklyn Suspension Center. Specifically
this work explains how one student, Gabriel, functions in a biology class. A self-described black-Panamanian, Gabriel had
tacitly resigned to not learning science, which then, in effect, precluded him from any further associated courses of study
in science, and may have excluded him from the possibility of a science related career. This ethnography follows Gabriel’s
science learning as he engaged in cogenerative dialogue with teachers to create aligned learning and teaching practices. During
the 5 months of this research, Gabriel drew upon his unique lifeworld and the depth of his hybridized cultural identity to
produce limited, but nonetheless important demonstrations of science. Coexistent with his involvement in cogenerative dialogue,
Gabriel helped to construct many classroom practices that supported a dynamic learning environment which produced small yet
concrete examples of standards based biology. This study supports further investigation by the science education community
to consider ways that students’ lifeworld experiences can serve to structure and transform the urban science classroom.
相似文献
Ed LehnerEmail: |
29.
Gwowen Shieh 《Journal of Experimental Education》2019,87(2):238-259
The analysis of covariance (ANCOVA) is a useful statistical procedure that incorporates covariate features into the adjustment of treatment effects. The consequences of omitted prognostic covariates on the statistical inferences of ANCOVA are well documented in the literature. However, the corresponding influence on sample-size calculations for precise interval estimation has not been fully evaluated. This article aims to explicate the deficiency of approximate methods for ignoring the stochastic nature of covariate variables and to present exact approaches for precise interval estimation of treatment contrasts under the assumption that the covariate variables have a joint multinormal distribution. The desired precision of a confidence interval is assessed with respect to the control of expected half-width and to the assurance probability of interval half-width within a designated value. Numerical appraisals show that the suggested approaches outperform the approximate formulas for the two precision considerations. 相似文献
30.
张艳 《宁波广播电视大学学报》2011,9(4):79-81
本文从高职英语教学目标及高职英语教学现状出发,探讨高职英语教学文化导入的教学中的教师角色的定位,提出高职英语教师应成为课堂教学活动的组织者、引导者、促进者、帮助者和评价者. 相似文献